Add support for health indicator groups

Update the `HealthEndpoint` to support health groups. The
`HealthEndpointSettings` interface has been replaced with
`HealthEndpointGroups` which provides access to the primary group
as well as an optional set of additional groups.

Groups can be configured via properties and may have custom
`StatusAggregator` and `HttpCodeStatusMapper` settings.

Closes gh-14022
Co-authored-by: Stephane Nicoll <snicoll@pivotal.io>

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthContributorRegistry.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.Collection;
+import java.util.Map;
+
+import org.springframework.boot.actuate.health.DefaultHealthContributorRegistry;
+import org.springframework.boot.actuate.health.HealthContributor;
+import org.springframework.boot.actuate.health.HealthContributorRegistry;
+import org.springframework.util.Assert;
+
+/**
+ * An auto-configured {@link HealthContributorRegistry} that ensures registered indicators
+ * do not clash with groups names.
+ *
+ * @author Phillip Webb
+ */
+class AutoConfiguredHealthContributorRegistry extends DefaultHealthContributorRegistry {
+
+	private final Collection<String> groupNames;
+
+	AutoConfiguredHealthContributorRegistry(Map<String, HealthContributor> contributors,
+			Collection<String> groupNames) {
+		super(contributors);
+		this.groupNames = groupNames;
+		contributors.keySet().forEach(this::assertDoesNotClashWithGroup);
+	}
+
+	@Override
+	public void registerContributor(String name, HealthContributor contributor) {
+		assertDoesNotClashWithGroup(name);
+		super.registerContributor(name, contributor);
+	}
+
+	private void assertDoesNotClashWithGroup(String name) {
+		Assert.state(!this.groupNames.contains(name),
+				() -> "HealthContributor with name \"" + name + "\" clashes with group");
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthEndpointSettings.java → spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthEndpointGroup.java

@@ -17,22 +17,24 @@
 package org.springframework.boot.actuate.autoconfigure.health;
 
 import java.util.Collection;
+import java.util.function.Predicate;
 
-import org.springframework.boot.actuate.autoconfigure.health.HealthEndpointProperties.ShowDetails;
+import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.ShowDetails;
 import org.springframework.boot.actuate.endpoint.SecurityContext;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroup;
 import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
 import org.springframework.boot.actuate.health.StatusAggregator;
 import org.springframework.util.CollectionUtils;
 
 /**
- * Auto-configured {@link HealthEndpointSettings} backed by
- * {@link HealthEndpointProperties}.
+ * Auto-configured {@link HealthEndpointGroup} backed by {@link HealthProperties}.
  *
  * @author Phillip Webb
  * @author Andy Wilkinson
  */
-class AutoConfiguredHealthEndpointSettings implements HealthEndpointSettings {
+class AutoConfiguredHealthEndpointGroup implements HealthEndpointGroup {
+
+	private final Predicate<String> members;
 
 	private final StatusAggregator statusAggregator;
 
@@ -43,20 +45,27 @@ class AutoConfiguredHealthEndpointSettings implements HealthEndpointSettings {
 	private final Collection<String> roles;
 
 	/**
-	 * Create a new {@link AutoConfiguredHealthEndpointSettings} instance.
+	 * Create a new {@link AutoConfiguredHealthEndpointGroup} instance.
+	 * @param members a predicate used to test for group membership
 	 * @param statusAggregator the status aggregator to use
 	 * @param httpCodeStatusMapper the HTTP code status mapper to use
 	 * @param showDetails the show details setting
 	 * @param roles the roles to match
 	 */
-	AutoConfiguredHealthEndpointSettings(StatusAggregator statusAggregator, HttpCodeStatusMapper httpCodeStatusMapper,
-			ShowDetails showDetails, Collection<String> roles) {
+	AutoConfiguredHealthEndpointGroup(Predicate<String> members, StatusAggregator statusAggregator,
+			HttpCodeStatusMapper httpCodeStatusMapper, ShowDetails showDetails, Collection<String> roles) {
+		this.members = members;
 		this.statusAggregator = statusAggregator;
 		this.httpCodeStatusMapper = httpCodeStatusMapper;
 		this.showDetails = showDetails;
 		this.roles = roles;
 	}
 
+	@Override
+	public boolean isMember(String name) {
+		return this.members.test(name);
+	}
+
 	@Override
 	public boolean includeDetails(SecurityContext securityContext) {
 		ShowDetails showDetails = this.showDetails;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthEndpointGroups.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryUtils;
+import org.springframework.beans.factory.ListableBeanFactory;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils;
+import org.springframework.boot.actuate.autoconfigure.health.HealthEndpointProperties.Group;
+import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.ShowDetails;
+import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.Status;
+import org.springframework.boot.actuate.health.HealthEndpointGroup;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
+import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
+import org.springframework.boot.actuate.health.SimpleHttpCodeStatusMapper;
+import org.springframework.boot.actuate.health.SimpleStatusAggregator;
+import org.springframework.boot.actuate.health.StatusAggregator;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.ObjectUtils;
+
+/**
+ * Auto-configured {@link HealthEndpointGroups}.
+ *
+ * @author Phillip Webb
+ */
+class AutoConfiguredHealthEndpointGroups implements HealthEndpointGroups {
+
+	private static Predicate<String> ALL = (name) -> true;
+
+	private final HealthEndpointGroup primaryGroup;
+
+	private final Map<String, HealthEndpointGroup> groups;
+
+	/**
+	 * Create a new {@link AutoConfiguredHealthEndpointGroups} instance.
+	 * @param applicationContext the application context used to check for override beans
+	 * @param properties the health endpoint properties
+	 */
+	AutoConfiguredHealthEndpointGroups(ApplicationContext applicationContext, HealthEndpointProperties properties) {
+		ListableBeanFactory beanFactory = (applicationContext instanceof ConfigurableApplicationContext)
+				? ((ConfigurableApplicationContext) applicationContext).getBeanFactory() : applicationContext;
+		ShowDetails showDetails = properties.getShowDetails();
+		Set<String> roles = properties.getRoles();
+		StatusAggregator statusAggregator = getNonQualifiedBean(beanFactory, StatusAggregator.class);
+		if (statusAggregator == null) {
+			statusAggregator = new SimpleStatusAggregator(properties.getStatus().getOrder());
+		}
+		HttpCodeStatusMapper httpCodeStatusMapper = getNonQualifiedBean(beanFactory, HttpCodeStatusMapper.class);
+		if (httpCodeStatusMapper == null) {
+			httpCodeStatusMapper = new SimpleHttpCodeStatusMapper(properties.getStatus().getHttpMapping());
+		}
+		this.primaryGroup = new AutoConfiguredHealthEndpointGroup(ALL, statusAggregator, httpCodeStatusMapper,
+				showDetails, roles);
+		this.groups = createGroups(properties.getGroup(), beanFactory, statusAggregator, httpCodeStatusMapper,
+				showDetails, roles);
+	}
+
+	private Map<String, HealthEndpointGroup> createGroups(Map<String, Group> groupProperties, BeanFactory beanFactory,
+			StatusAggregator defaultStatusAggregator, HttpCodeStatusMapper defaultHttpCodeStatusMapper,
+			ShowDetails defaultShowDetails, Set<String> defaultRoles) {
+		Map<String, HealthEndpointGroup> groups = new LinkedHashMap<String, HealthEndpointGroup>();
+		groupProperties.forEach((groupName, group) -> {
+			Status status = group.getStatus();
+			ShowDetails showDetails = (group.getShowDetails() != null) ? group.getShowDetails() : defaultShowDetails;
+			Set<String> roles = !CollectionUtils.isEmpty(group.getRoles()) ? group.getRoles() : defaultRoles;
+			StatusAggregator statusAggregator = getQualifiedBean(beanFactory, StatusAggregator.class, groupName, () -> {
+				if (!CollectionUtils.isEmpty(status.getOrder())) {
+					return new SimpleStatusAggregator(status.getOrder());
+				}
+				return defaultStatusAggregator;
+			});
+			HttpCodeStatusMapper httpCodeStatusMapper = getQualifiedBean(beanFactory, HttpCodeStatusMapper.class,
+					groupName, () -> {
+						if (!CollectionUtils.isEmpty(status.getHttpMapping())) {
+							return new SimpleHttpCodeStatusMapper(status.getHttpMapping());
+						}
+						return defaultHttpCodeStatusMapper;
+					});
+			Predicate<String> members = new IncludeExcludeGroupMemberPredicate(group.getInclude(), group.getExclude());
+			groups.put(groupName, new AutoConfiguredHealthEndpointGroup(members, statusAggregator, httpCodeStatusMapper,
+					showDetails, roles));
+		});
+		return Collections.unmodifiableMap(groups);
+	}
+
+	private <T> T getNonQualifiedBean(ListableBeanFactory beanFactory, Class<T> type) {
+		List<String> candidates = new ArrayList<>();
+		for (String beanName : BeanFactoryUtils.beanNamesForTypeIncludingAncestors(beanFactory, type)) {
+			String[] aliases = beanFactory.getAliases(beanName);
+			if (!BeanFactoryAnnotationUtils.isQualifierMatch(
+					(qualifier) -> !qualifier.equals(beanName) && !ObjectUtils.containsElement(aliases, qualifier),
+					beanName, beanFactory)) {
+				candidates.add(beanName);
+			}
+		}
+		if (candidates.isEmpty()) {
+			return null;
+		}
+		if (candidates.size() == 1) {
+			return beanFactory.getBean(candidates.get(0), type);
+		}
+		return beanFactory.getBean(type);
+	}
+
+	private <T> T getQualifiedBean(BeanFactory beanFactory, Class<T> type, String qualifier, Supplier<T> fallback) {
+		try {
+			return BeanFactoryAnnotationUtils.qualifiedBeanOfType(beanFactory, type, qualifier);
+		}
+		catch (NoSuchBeanDefinitionException ex) {
+			return fallback.get();
+		}
+	}
+
+	@Override
+	public HealthEndpointGroup getPrimary() {
+		return this.primaryGroup;
+	}
+
+	@Override
+	public Set<String> getNames() {
+		return this.groups.keySet();
+	}
+
+	@Override
+	public HealthEndpointGroup get(String name) {
+		return this.groups.get(name);
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredReactiveHealthContributorRegistry.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.Collection;
+import java.util.Map;
+
+import org.springframework.boot.actuate.health.DefaultReactiveHealthContributorRegistry;
+import org.springframework.boot.actuate.health.HealthContributorRegistry;
+import org.springframework.boot.actuate.health.ReactiveHealthContributor;
+import org.springframework.util.Assert;
+
+/**
+ * An auto-configured {@link HealthContributorRegistry} that ensures registered indicators
+ * do not clash with groups names.
+ *
+ * @author Phillip Webb
+ */
+class AutoConfiguredReactiveHealthContributorRegistry extends DefaultReactiveHealthContributorRegistry {
+
+	private final Collection<String> groupNames;
+
+	AutoConfiguredReactiveHealthContributorRegistry(Map<String, ReactiveHealthContributor> contributors,
+			Collection<String> groupNames) {
+		super(contributors);
+		this.groupNames = groupNames;
+		contributors.keySet().forEach(this::assertDoesNotClashWithGroup);
+	}
+
+	@Override
+	public void registerContributor(String name, ReactiveHealthContributor contributor) {
+		assertDoesNotClashWithGroup(name);
+		super.registerContributor(name, contributor);
+	}
+
+	private void assertDoesNotClashWithGroup(String name) {
+		Assert.state(!this.groupNames.contains(name),
+				() -> "ReactiveHealthContributor with name \"" + name + "\" clashes with group");
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.java

@@ -18,17 +18,16 @@ package org.springframework.boot.actuate.autoconfigure.health;
 
 import java.util.Map;
 
-import org.springframework.beans.factory.ObjectProvider;
-import org.springframework.boot.actuate.health.DefaultHealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthContributor;
 import org.springframework.boot.actuate.health.HealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
 import org.springframework.boot.actuate.health.SimpleHttpCodeStatusMapper;
 import org.springframework.boot.actuate.health.SimpleStatusAggregator;
 import org.springframework.boot.actuate.health.StatusAggregator;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -55,27 +54,22 @@ class HealthEndpointConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
-	HealthEndpointSettings healthEndpointSettings(HealthEndpointProperties properties,
-			ObjectProvider<StatusAggregator> statusAggregatorProvider,
-			ObjectProvider<HttpCodeStatusMapper> httpCodeStatusMapperProvider) {
-		StatusAggregator statusAggregator = statusAggregatorProvider
-				.getIfAvailable(() -> new SimpleStatusAggregator(properties.getStatus().getOrder()));
-		HttpCodeStatusMapper httpCodeStatusMapper = httpCodeStatusMapperProvider
-				.getIfAvailable(() -> new SimpleHttpCodeStatusMapper(properties.getStatus().getHttpMapping()));
-		return new AutoConfiguredHealthEndpointSettings(statusAggregator, httpCodeStatusMapper,
-				properties.getShowDetails(), properties.getRoles());
+	HealthEndpointGroups healthEndpointGroups(ApplicationContext applicationContext,
+			HealthEndpointProperties properties) {
+		return new AutoConfiguredHealthEndpointGroups(applicationContext, properties);
 	}
 
 	@Bean
 	@ConditionalOnMissingBean
-	HealthContributorRegistry healthContributorRegistry(Map<String, HealthContributor> healthContributors) {
-		return new DefaultHealthContributorRegistry(healthContributors);
+	HealthContributorRegistry healthContributorRegistry(Map<String, HealthContributor> healthContributors,
+			HealthEndpointGroups groups) {
+		return new AutoConfiguredHealthContributorRegistry(healthContributors, groups.getNames());
 	}
 
 	@Bean
 	@ConditionalOnMissingBean
-	HealthEndpoint healthEndpoint(HealthContributorRegistry registry, HealthEndpointSettings settings) {
-		return new HealthEndpoint(registry, settings);
+	HealthEndpoint healthEndpoint(HealthContributorRegistry registry, HealthEndpointGroups groups) {
+		return new HealthEndpoint(registry, groups);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointProperties.java

@@ -16,9 +16,7 @@
 
 package org.springframework.boot.actuate.autoconfigure.health;
 
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
+import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Set;
 
@@ -32,93 +30,47 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @since 2.0.0
  */
 @ConfigurationProperties("management.endpoint.health")
-public class HealthEndpointProperties {
-
-	private final Status status = new Status();
-
-	/**
-	 * When to show full health details.
-	 */
-	private ShowDetails showDetails = ShowDetails.NEVER;
+public class HealthEndpointProperties extends HealthProperties {
 
 	/**
-	 * Roles used to determine whether or not a user is authorized to be shown details.
-	 * When empty, all authenticated users are authorized.
+	 * Health endpoint groups.
 	 */
-	private Set<String> roles = new HashSet<>();
+	private Map<String, Group> group = new LinkedHashMap<>();
 
-	public Status getStatus() {
-		return this.status;
-	}
-
-	public ShowDetails getShowDetails() {
-		return this.showDetails;
-	}
-
-	public void setShowDetails(ShowDetails showDetails) {
-		this.showDetails = showDetails;
-	}
-
-	public Set<String> getRoles() {
-		return this.roles;
-	}
-
-	public void setRoles(Set<String> roles) {
-		this.roles = roles;
+	public Map<String, Group> getGroup() {
+		return this.group;
 	}
 
 	/**
-	 * Status properties for the group.
+	 * A health endpoint group.
 	 */
-	public static class Status {
+	public static class Group extends HealthProperties {
 
 		/**
-		 * Comma-separated list of health statuses in order of severity.
+		 * The health indicator IDs to include. Use '*' if you want to include all.
 		 */
-		private List<String> order = null;
+		private Set<String> include;
 
 		/**
-		 * Mapping of health statuses to HTTP status codes. By default, registered health
-		 * statuses map to sensible defaults (for example, UP maps to 200).
+		 * The health indicator IDs to exclude. Use '*' if you want to exclude all.
 		 */
-		private final Map<String, Integer> httpMapping = new HashMap<>();
+		private Set<String> exclude;
 
-		public List<String> getOrder() {
-			return this.order;
+		public Set<String> getInclude() {
+			return this.include;
 		}
 
-		public void setOrder(List<String> statusOrder) {
-			if (statusOrder != null && !statusOrder.isEmpty()) {
-				this.order = statusOrder;
-			}
+		public void setInclude(Set<String> include) {
+			this.include = include;
 		}
 
-		public Map<String, Integer> getHttpMapping() {
-			return this.httpMapping;
+		public Set<String> getExclude() {
+			return this.exclude;
 		}
 
-	}
-
-	/**
-	 * Options for showing details in responses from the {@link HealthEndpoint} web
-	 * extensions.
-	 */
-	public enum ShowDetails {
-
-		/**
-		 * Never show details in the response.
-		 */
-		NEVER,
-
-		/**
-		 * Show details in the response when accessed by an authorized user.
-		 */
-		WHEN_AUTHORIZED,
-
-		/**
-		 * Always show details in the response.
-		 */
-		ALWAYS
+		public void setExclude(Set<String> exclude) {
+			this.exclude = exclude;
+		}
 
 	}
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointReactiveWebExtensionConfiguration.java

@@ -17,7 +17,7 @@
 package org.springframework.boot.actuate.autoconfigure.health;
 
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.ReactiveHealthContributorRegistry;
 import org.springframework.boot.actuate.health.ReactiveHealthEndpointWebExtension;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -42,8 +42,8 @@ class HealthEndpointReactiveWebExtensionConfiguration {
 	@ConditionalOnMissingBean
 	@ConditionalOnBean(HealthEndpoint.class)
 	ReactiveHealthEndpointWebExtension reactiveHealthEndpointWebExtension(
-			ReactiveHealthContributorRegistry reactiveHealthContributorRegistry, HealthEndpointSettings settings) {
-		return new ReactiveHealthEndpointWebExtension(reactiveHealthContributorRegistry, settings);
+			ReactiveHealthContributorRegistry reactiveHealthContributorRegistry, HealthEndpointGroups groups) {
+		return new ReactiveHealthEndpointWebExtension(reactiveHealthContributorRegistry, groups);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointWebExtensionConfiguration.java

@@ -18,7 +18,7 @@ package org.springframework.boot.actuate.autoconfigure.health;
 
 import org.springframework.boot.actuate.health.HealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.HealthEndpointWebExtension;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -42,8 +42,8 @@ class HealthEndpointWebExtensionConfiguration {
 	@ConditionalOnBean(HealthEndpoint.class)
 	@ConditionalOnMissingBean
 	HealthEndpointWebExtension healthEndpointWebExtension(HealthContributorRegistry healthContributorRegistry,
-			HealthEndpointSettings settings) {
-		return new HealthEndpointWebExtension(healthContributorRegistry, settings);
+			HealthEndpointGroups groups) {
+		return new HealthEndpointWebExtension(healthContributorRegistry, groups);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthProperties.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.springframework.boot.actuate.health.HealthEndpoint;
+
+/**
+ * Properties used to configure the health endpoint and endpoint groups.
+ *
+ * @author Stephane Nicoll
+ * @author Phillip Webb
+ * @since 2.2.0
+ */
+public abstract class HealthProperties {
+
+	private final Status status = new Status();
+
+	/**
+	 * When to show full health details.
+	 */
+	private ShowDetails showDetails = ShowDetails.NEVER;
+
+	/**
+	 * Roles used to determine whether or not a user is authorized to be shown details.
+	 * When empty, all authenticated users are authorized.
+	 */
+	private Set<String> roles = new HashSet<>();
+
+	public Status getStatus() {
+		return this.status;
+	}
+
+	public ShowDetails getShowDetails() {
+		return this.showDetails;
+	}
+
+	public void setShowDetails(ShowDetails showDetails) {
+		this.showDetails = showDetails;
+	}
+
+	public Set<String> getRoles() {
+		return this.roles;
+	}
+
+	public void setRoles(Set<String> roles) {
+		this.roles = roles;
+	}
+
+	/**
+	 * Status properties for the group.
+	 */
+	public static class Status {
+
+		/**
+		 * Comma-separated list of health statuses in order of severity.
+		 */
+		private List<String> order = null;
+
+		/**
+		 * Mapping of health statuses to HTTP status codes. By default, registered health
+		 * statuses map to sensible defaults (for example, UP maps to 200).
+		 */
+		private final Map<String, Integer> httpMapping = new HashMap<>();
+
+		public List<String> getOrder() {
+			return this.order;
+		}
+
+		public void setOrder(List<String> statusOrder) {
+			if (statusOrder != null && !statusOrder.isEmpty()) {
+				this.order = statusOrder;
+			}
+		}
+
+		public Map<String, Integer> getHttpMapping() {
+			return this.httpMapping;
+		}
+
+	}
+
+	/**
+	 * Options for showing details in responses from the {@link HealthEndpoint} web
+	 * extensions.
+	 */
+	public enum ShowDetails {
+
+		/**
+		 * Never show details in the response.
+		 */
+		NEVER,
+
+		/**
+		 * Show details in the response when accessed by an authorized user.
+		 */
+		WHEN_AUTHORIZED,
+
+		/**
+		 * Always show details in the response.
+		 */
+		ALWAYS
+
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/ReactiveHealthEndpointConfiguration.java

@@ -21,9 +21,9 @@ import java.util.Map;
 
 import reactor.core.publisher.Flux;
 
-import org.springframework.boot.actuate.health.DefaultReactiveHealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthContributor;
 import org.springframework.boot.actuate.health.HealthEndpoint;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.ReactiveHealthContributor;
 import org.springframework.boot.actuate.health.ReactiveHealthContributorRegistry;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -47,11 +47,11 @@ class ReactiveHealthEndpointConfiguration {
 	@ConditionalOnMissingBean
 	ReactiveHealthContributorRegistry reactiveHealthContributorRegistry(
 			Map<String, HealthContributor> healthContributors,
-			Map<String, ReactiveHealthContributor> reactiveHealthContributors) {
+			Map<String, ReactiveHealthContributor> reactiveHealthContributors, HealthEndpointGroups groups) {
 		Map<String, ReactiveHealthContributor> allContributors = new LinkedHashMap<>(reactiveHealthContributors);
 		healthContributors.forEach((name, contributor) -> allContributors.computeIfAbsent(name,
 				(key) -> ReactiveHealthContributor.adapt(contributor)));
-		return new DefaultReactiveHealthContributorRegistry(allContributors);
+		return new AutoConfiguredReactiveHealthContributorRegistry(allContributors, groups.getNames());
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebEndpointDiscovererTests.java

@@ -37,7 +37,7 @@ import org.springframework.boot.actuate.endpoint.web.WebOperation;
 import org.springframework.boot.actuate.endpoint.web.annotation.EndpointWebExtension;
 import org.springframework.boot.actuate.health.HealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -112,8 +112,8 @@ class CloudFoundryWebEndpointDiscovererTests {
 		@Bean
 		HealthEndpoint healthEndpoint() {
 			HealthContributorRegistry registry = mock(HealthContributorRegistry.class);
-			HealthEndpointSettings settings = mock(HealthEndpointSettings.class);
-			return new HealthEndpoint(registry, settings);
+			HealthEndpointGroups groups = mock(HealthEndpointGroups.class);
+			return new HealthEndpoint(registry, groups);
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/HealthEndpointDocumentationTests.java

@@ -18,6 +18,7 @@ package org.springframework.boot.actuate.autoconfigure.endpoint.web.documentatio
 
 import java.io.File;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -33,7 +34,8 @@ import org.springframework.boot.actuate.health.Health;
 import org.springframework.boot.actuate.health.HealthContributor;
 import org.springframework.boot.actuate.health.HealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroup;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.HealthIndicator;
 import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
 import org.springframework.boot.actuate.health.SimpleHttpCodeStatusMapper;
@@ -104,8 +106,9 @@ class HealthEndpointDocumentationTests extends MockMvcEndpointDocumentationTests
 		@Bean
 		HealthEndpoint healthEndpoint(Map<String, HealthContributor> healthContributors) {
 			HealthContributorRegistry registry = new DefaultHealthContributorRegistry(healthContributors);
-			HealthEndpointSettings settings = new TestHealthEndpointSettings();
-			return new HealthEndpoint(registry, settings);
+			HealthEndpointGroup primary = new TestHealthEndpointGroup();
+			HealthEndpointGroups groups = HealthEndpointGroups.of(primary, Collections.emptyMap());
+			return new HealthEndpoint(registry, groups);
 		}
 
 		@Bean
@@ -128,12 +131,17 @@ class HealthEndpointDocumentationTests extends MockMvcEndpointDocumentationTests
 
 	}
 
-	private static class TestHealthEndpointSettings implements HealthEndpointSettings {
+	private static class TestHealthEndpointGroup implements HealthEndpointGroup {
 
 		private final StatusAggregator statusAggregator = new SimpleStatusAggregator();
 
 		private final HttpCodeStatusMapper httpCodeStatusMapper = new SimpleHttpCodeStatusMapper();
 
+		@Override
+		public boolean isMember(String name) {
+			return true;
+		}
+
 		@Override
 		public boolean includeDetails(SecurityContext securityContext) {
 			return true;

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthContributorRegistryTests.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.health.HealthContributor;
+import org.springframework.boot.actuate.health.HealthContributorRegistry;
+
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link AutoConfiguredHealthContributorRegistry}.
+ *
+ * @author Phillip Webb
+ */
+class AutoConfiguredHealthContributorRegistryTests {
+
+	@Test
+	void createWhenContributorsClashesWithGroupNameThrowsException() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> new AutoConfiguredHealthContributorRegistry(
+						Collections.singletonMap("boot", mock(HealthContributor.class)),
+						Arrays.asList("spring", "boot")))
+				.withMessage("HealthContributor with name \"boot\" clashes with group");
+	}
+
+	@Test
+	void registerContributorWithGroupNameThrowsException() {
+		HealthContributorRegistry registry = new AutoConfiguredHealthContributorRegistry(Collections.emptyMap(),
+				Arrays.asList("spring", "boot"));
+		assertThatIllegalStateException()
+				.isThrownBy(() -> registry.registerContributor("spring", mock(HealthContributor.class)))
+				.withMessage("HealthContributor with name \"spring\" clashes with group");
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthEndpointSettingsTests.java → spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredHealthEndpointGroupTests.java

@@ -25,7 +25,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import org.springframework.boot.actuate.autoconfigure.health.HealthEndpointProperties.ShowDetails;
+import org.springframework.boot.actuate.autoconfigure.health.HealthProperties.ShowDetails;
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
 import org.springframework.boot.actuate.health.StatusAggregator;
@@ -34,11 +34,11 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.BDDMockito.given;
 
 /**
- * Tests for {@link AutoConfiguredHealthEndpointSettings}.
+ * Tests for {@link AutoConfiguredHealthEndpointGroup}.
  *
  * @author Phillip Webb
  */
-class AutoConfiguredHealthEndpointSettingsTests {
+class AutoConfiguredHealthEndpointGroupTests {
 
 	@Mock
 	private StatusAggregator statusAggregator;
@@ -57,66 +57,84 @@ class AutoConfiguredHealthEndpointSettingsTests {
 		MockitoAnnotations.initMocks(this);
 	}
 
+	@Test
+	void isMemberWhenMemberPredicateMatchesAcceptsTrue() {
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> name.startsWith("a"),
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
+		assertThat(group.isMember("albert")).isTrue();
+		assertThat(group.isMember("arnold")).isTrue();
+	}
+
+	@Test
+	void isMemberWhenMemberPredicateRejectsReturnsTrue() {
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> name.startsWith("a"),
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
+		assertThat(group.isMember("bert")).isFalse();
+		assertThat(group.isMember("ernie")).isFalse();
+	}
+
 	@Test
 	void includeDetailsWhenShowDetailsIsNeverReturnsFalse() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.NEVER, Collections.emptySet());
-		assertThat(settings.includeDetails(SecurityContext.NONE)).isFalse();
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.NEVER, Collections.emptySet());
+		assertThat(group.includeDetails(SecurityContext.NONE)).isFalse();
 	}
 
 	@Test
 	void includeDetailsWhenShowDetailsIsAlwaysReturnsTrue() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
-		assertThat(settings.includeDetails(SecurityContext.NONE)).isTrue();
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
+		assertThat(group.includeDetails(SecurityContext.NONE)).isTrue();
 	}
 
 	@Test
 	void includeDetailsWhenShowDetailsIsWhenAuthorizedAndPrincipalIsNullReturnsFalse() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Collections.emptySet());
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Collections.emptySet());
 		given(this.securityContext.getPrincipal()).willReturn(null);
-		assertThat(settings.includeDetails(this.securityContext)).isFalse();
+		assertThat(group.includeDetails(this.securityContext)).isFalse();
 	}
 
 	@Test
 	void includeDetailsWhenShowDetailsIsWhenAuthorizedAndRolesAreEmptyReturnsTrue() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Collections.emptySet());
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Collections.emptySet());
 		given(this.securityContext.getPrincipal()).willReturn(this.principal);
-		assertThat(settings.includeDetails(this.securityContext)).isTrue();
+		assertThat(group.includeDetails(this.securityContext)).isTrue();
 	}
 
 	@Test
 	void includeDetailsWhenShowDetailsIsWhenAuthorizedAndUseIsInRoleReturnsTrue() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Arrays.asList("admin", "root", "bossmode"));
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED,
+				Arrays.asList("admin", "root", "bossmode"));
 		given(this.securityContext.getPrincipal()).willReturn(this.principal);
 		given(this.securityContext.isUserInRole("root")).willReturn(true);
-		assertThat(settings.includeDetails(this.securityContext)).isTrue();
+		assertThat(group.includeDetails(this.securityContext)).isTrue();
 	}
 
 	@Test
 	void includeDetailsWhenShowDetailsIsWhenAuthorizedAndUseIsNotInRoleReturnsFalse() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED, Arrays.asList("admin", "rot", "bossmode"));
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.WHEN_AUTHORIZED,
+				Arrays.asList("admin", "rot", "bossmode"));
 		given(this.securityContext.getPrincipal()).willReturn(this.principal);
 		given(this.securityContext.isUserInRole("root")).willReturn(true);
-		assertThat(settings.includeDetails(this.securityContext)).isFalse();
+		assertThat(group.includeDetails(this.securityContext)).isFalse();
 	}
 
 	@Test
 	void getStatusAggregatorReturnsStatusAggregator() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
-		assertThat(settings.getStatusAggregator()).isSameAs(this.statusAggregator);
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
+		assertThat(group.getStatusAggregator()).isSameAs(this.statusAggregator);
 	}
 
 	@Test
 	void getHttpCodeStatusMapperReturnsHttpCodeStatusMapper() {
-		AutoConfiguredHealthEndpointSettings settings = new AutoConfiguredHealthEndpointSettings(this.statusAggregator,
-				this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
-		assertThat(settings.getHttpCodeStatusMapper()).isSameAs(this.httpCodeStatusMapper);
+		AutoConfiguredHealthEndpointGroup group = new AutoConfiguredHealthEndpointGroup((name) -> true,
+				this.statusAggregator, this.httpCodeStatusMapper, ShowDetails.ALWAYS, Collections.emptySet());
+		assertThat(group.getHttpCodeStatusMapper()).isSameAs(this.httpCodeStatusMapper);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/AutoConfiguredReactiveHealthContributorRegistryTests.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.health;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.health.ReactiveHealthContributor;
+import org.springframework.boot.actuate.health.ReactiveHealthContributorRegistry;
+
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link AutoConfiguredReactiveHealthContributorRegistry}.
+ *
+ * @author Phillip Webb
+ */
+class AutoConfiguredReactiveHealthContributorRegistryTests {
+
+	@Test
+	void createWhenContributorsClashesWithGroupNameThrowsException() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> new AutoConfiguredReactiveHealthContributorRegistry(
+						Collections.singletonMap("boot", mock(ReactiveHealthContributor.class)),
+						Arrays.asList("spring", "boot")))
+				.withMessage("ReactiveHealthContributor with name \"boot\" clashes with group");
+	}
+
+	@Test
+	void registerContributorWithGroupNameThrowsException() {
+		ReactiveHealthContributorRegistry registry = new AutoConfiguredReactiveHealthContributorRegistry(
+				Collections.emptyMap(), Arrays.asList("spring", "boot"));
+		assertThatIllegalStateException()
+				.isThrownBy(() -> registry.registerContributor("spring", mock(ReactiveHealthContributor.class)))
+				.withMessage("ReactiveHealthContributor with name \"spring\" clashes with group");
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointAutoConfigurationTests.java

@@ -16,10 +16,10 @@
 
 package org.springframework.boot.actuate.autoconfigure.health;
 
+import java.util.Collections;
 import java.util.List;
 
 import org.junit.jupiter.api.Test;
-import org.mockito.Mockito;
 import reactor.core.publisher.Mono;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
@@ -32,7 +32,7 @@ import org.springframework.boot.actuate.health.HealthAggregator;
 import org.springframework.boot.actuate.health.HealthComponent;
 import org.springframework.boot.actuate.health.HealthContributorRegistry;
 import org.springframework.boot.actuate.health.HealthEndpoint;
-import org.springframework.boot.actuate.health.HealthEndpointSettings;
+import org.springframework.boot.actuate.health.HealthEndpointGroups;
 import org.springframework.boot.actuate.health.HealthEndpointWebExtension;
 import org.springframework.boot.actuate.health.HealthIndicator;
 import org.springframework.boot.actuate.health.HealthStatusHttpMapper;
@@ -50,6 +50,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
 
 /**
@@ -75,7 +76,7 @@ class HealthEndpointAutoConfigurationTests {
 		this.contextRunner.withPropertyValues("management.endpoint.health.enabled=false").run((context) -> {
 			assertThat(context).doesNotHaveBean(StatusAggregator.class);
 			assertThat(context).doesNotHaveBean(HttpCodeStatusMapper.class);
-			assertThat(context).doesNotHaveBean(HealthEndpointSettings.class);
+			assertThat(context).doesNotHaveBean(HealthEndpointGroups.class);
 			assertThat(context).doesNotHaveBean(HealthContributorRegistry.class);
 			assertThat(context).doesNotHaveBean(HealthEndpoint.class);
 			assertThat(context).doesNotHaveBean(ReactiveHealthContributorRegistry.class);
@@ -152,19 +153,21 @@ class HealthEndpointAutoConfigurationTests {
 	}
 
 	@Test
-	void runCreatesHealthEndpointSettings() {
-		this.contextRunner.run((context) -> {
-			HealthEndpointSettings settings = context.getBean(HealthEndpointSettings.class);
-			assertThat(settings).isInstanceOf(AutoConfiguredHealthEndpointSettings.class);
+	void runCreatesHealthEndpointGroups() {
+		this.contextRunner.withPropertyValues("management.endpoint.health.group.ready.include=*").run((context) -> {
+			HealthEndpointGroups groups = context.getBean(HealthEndpointGroups.class);
+			assertThat(groups).isInstanceOf(AutoConfiguredHealthEndpointGroups.class);
+			assertThat(groups.getNames()).containsOnly("ready");
 		});
 	}
 
 	@Test
-	void runWhenHasHealthEndpointSettingsBeanDoesNotCreateAdditionalHealthEndpointSettings() {
-		this.contextRunner.withUserConfiguration(HealthEndpointSettingsConfiguration.class).run((context) -> {
-			HealthEndpointSettings settings = context.getBean(HealthEndpointSettings.class);
-			assertThat(Mockito.mockingDetails(settings).isMock()).isTrue();
-		});
+	void runWhenHasHealthEndpointGroupsBeanDoesNotCreateAdditionalHealthEndpointGroups() {
+		this.contextRunner.withUserConfiguration(HealthEndpointGroupsConfiguration.class)
+				.withPropertyValues("management.endpoint.health.group.ready.include=*").run((context) -> {
+					HealthEndpointGroups groups = context.getBean(HealthEndpointGroups.class);
+					assertThat(groups.getNames()).containsOnly("mock");
+				});
 	}
 
 	@Test
@@ -340,11 +343,13 @@ class HealthEndpointAutoConfigurationTests {
 	}
 
 	@Configuration(proxyBeanMethods = false)
-	static class HealthEndpointSettingsConfiguration {
+	static class HealthEndpointGroupsConfiguration {
 
 		@Bean
-		HealthEndpointSettings healthEndpointSettings() {
-			return mock(HealthEndpointSettings.class);
+		HealthEndpointGroups healthEndpointGroups() {
+			HealthEndpointGroups groups = mock(HealthEndpointGroups.class);
+			given(groups.getNames()).willReturn(Collections.singleton("mock"));
+			return groups;
 		}
 
 	}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpoint.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.health;
 
 import java.util.Map;
+import java.util.Set;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
@@ -43,7 +44,7 @@ public class HealthEndpoint extends HealthEndpointSupport<HealthContributor, Hea
 	 * healthIndicator} to generate its response.
 	 * @param healthIndicator the health indicator
 	 * @deprecated since 2.2.0 in favor of
-	 * {@link #HealthEndpoint(HealthContributorRegistry, HealthEndpointSettings)}
+	 * {@link #HealthEndpoint(HealthContributorRegistry, HealthEndpointGroups)}
 	 */
 	@Deprecated
 	public HealthEndpoint(HealthIndicator healthIndicator) {
@@ -52,10 +53,10 @@ public class HealthEndpoint extends HealthEndpointSupport<HealthContributor, Hea
 	/**
 	 * Create a new {@link HealthEndpoint} instance.
 	 * @param registry the health contributor registry
-	 * @param settings the health endpoint settings
+	 * @param groups the health endpoint groups
 	 */
-	public HealthEndpoint(HealthContributorRegistry registry, HealthEndpointSettings settings) {
-		super(registry, settings);
+	public HealthEndpoint(HealthContributorRegistry registry, HealthEndpointGroups groups) {
+		super(registry, groups);
 	}
 
 	@ReadOperation
@@ -65,7 +66,8 @@ public class HealthEndpoint extends HealthEndpointSupport<HealthContributor, Hea
 
 	@ReadOperation
 	public HealthComponent healthForPath(@Selector(match = Match.ALL_REMAINING) String... path) {
-		return getHealth(SecurityContext.NONE, true, path);
+		HealthResult<HealthComponent> result = getHealth(SecurityContext.NONE, true, path);
+		return (result != null) ? result.getHealth() : null;
 	}
 
 	@Override
@@ -75,8 +77,8 @@ public class HealthEndpoint extends HealthEndpointSupport<HealthContributor, Hea
 
 	@Override
 	protected HealthComponent aggregateContributions(Map<String, HealthComponent> contributions,
-			StatusAggregator statusAggregator, boolean includeDetails) {
-		return getCompositeHealth(contributions, statusAggregator, includeDetails);
+			StatusAggregator statusAggregator, boolean includeDetails, Set<String> groupNames) {
+		return getCompositeHealth(contributions, statusAggregator, includeDetails, groupNames);
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointSettings.java → spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointGroup.java

@@ -19,12 +19,20 @@ package org.springframework.boot.actuate.health;
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 
 /**
- * Setting for a {@link HealthEndpoint}.
+ * A logical grouping of {@link HealthContributor health contributors} that can be exposed
+ * by the {@link HealthEndpoint}.
  *
  * @author Phillip Webb
  * @since 2.2.0
  */
-public interface HealthEndpointSettings {
+public interface HealthEndpointGroup {
+
+	/**
+	 * Returns {@code true} if the given contributor is a member of this group.
+	 * @param name the contributor name
+	 * @return {@code true} if the contributor is a member of this group
+	 */
+	boolean isMember(String name);
 
 	/**
 	 * Returns if {@link Health#getDetails() health details} should be included in the
@@ -35,13 +43,13 @@ public interface HealthEndpointSettings {
 	boolean includeDetails(SecurityContext securityContext);
 
 	/**
-	 * Returns the status agreggator that should be used for the endpoint.
-	 * @return the status aggregator
+	 * Returns the status agreggator that should be used for this group.
+	 * @return the status aggregator for this group
 	 */
 	StatusAggregator getStatusAggregator();
 
 	/**
-	 * Returns the {@link HttpCodeStatusMapper} that should be used for the endpoint.
+	 * Returns the {@link HttpCodeStatusMapper} that should be used for this group.
 	 * @return the HTTP code status mapper
 	 */
 	HttpCodeStatusMapper getHttpCodeStatusMapper();

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointGroups.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.health;
+
+import java.util.Map;
+import java.util.Set;
+
+import org.springframework.util.Assert;
+
+/**
+ * A collection of {@link HealthEndpointGroup groups} for use with a health endpoint.
+ *
+ * @author Phillip Webb
+ * @since 2.2.0
+ */
+public interface HealthEndpointGroups {
+
+	/**
+	 * Return the primary group used by the endpoint.
+	 * @return the primary group (never {@code null})
+	 */
+	HealthEndpointGroup getPrimary();
+
+	/**
+	 * Return the names of any additional groups.
+	 * @return the additional group names
+	 */
+	Set<String> getNames();
+
+	/**
+	 * Return the group with the specified name or {@code null} if the name is not known.
+	 * @param name the name of the group
+	 * @return the {@link HealthEndpointGroup} or {@code null}
+	 */
+	HealthEndpointGroup get(String name);
+
+	/**
+	 * Factory method to create a {@link HealthEndpointGroups} instance.
+	 * @param primary the primary group
+	 * @param additional the additional groups
+	 * @return a new {@link HealthEndpointGroups} instance
+	 */
+	static HealthEndpointGroups of(HealthEndpointGroup primary, Map<String, HealthEndpointGroup> additional) {
+		Assert.notNull(primary, "Primary must not be null");
+		Assert.notNull(additional, "Additional must not be null");
+		return new HealthEndpointGroups() {
+
+			@Override
+			public HealthEndpointGroup getPrimary() {
+				return primary;
+			}
+
+			@Override
+			public Set<String> getNames() {
+				return additional.keySet();
+			}
+
+			@Override
+			public HealthEndpointGroup get(String name) {
+				return additional.get(name);
+			}
+
+		};
+	}
+
+}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointSupport.java

@@ -18,6 +18,7 @@ package org.springframework.boot.actuate.health;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
@@ -34,7 +35,7 @@ abstract class HealthEndpointSupport<C, T> {
 
 	private final ContributorRegistry<C> registry;
 
-	private final HealthEndpointSettings settings;
+	private final HealthEndpointGroups groups;
 
 	/**
 	 * Throw a new {@link IllegalStateException} to indicate a constructor has been
@@ -49,37 +50,39 @@ abstract class HealthEndpointSupport<C, T> {
 	/**
 	 * Create a new {@link HealthEndpointSupport} instance.
 	 * @param registry the health contributor registry
-	 * @param settings the health settings
+	 * @param groups the health endpoint groups
 	 */
-	HealthEndpointSupport(ContributorRegistry<C> registry, HealthEndpointSettings settings) {
+	HealthEndpointSupport(ContributorRegistry<C> registry, HealthEndpointGroups groups) {
 		Assert.notNull(registry, "Registry must not be null");
-		Assert.notNull(settings, "Settings must not be null");
+		Assert.notNull(groups, "Groups must not be null");
 		this.registry = registry;
-		this.settings = settings;
+		this.groups = groups;
 	}
 
-	/**
-	 * Return the health endpoint settings.
-	 * @return the settings
-	 */
-	protected final HealthEndpointSettings getSettings() {
-		return this.settings;
+	HealthResult<T> getHealth(SecurityContext securityContext, boolean alwaysIncludeDetails, String... path) {
+		HealthEndpointGroup group = (path.length > 0) ? this.groups.get(path[0]) : null;
+		if (group != null) {
+			return getHealth(group, securityContext, alwaysIncludeDetails, path, 1);
+		}
+		return getHealth(this.groups.getPrimary(), securityContext, alwaysIncludeDetails, path, 0);
 	}
 
-	T getHealth(SecurityContext securityContext, boolean alwaysIncludeDetails, String... path) {
-		boolean includeDetails = alwaysIncludeDetails || this.settings.includeDetails(securityContext);
-		boolean isRoot = path.length == 0;
+	private HealthResult<T> getHealth(HealthEndpointGroup group, SecurityContext securityContext,
+			boolean alwaysIncludeDetails, String[] path, int pathOffset) {
+		boolean includeDetails = alwaysIncludeDetails || group.includeDetails(securityContext);
+		boolean isSystemHealth = group == this.groups.getPrimary() && pathOffset == 0;
+		boolean isRoot = path.length - pathOffset == 0;
 		if (!includeDetails && !isRoot) {
 			return null;
 		}
-		Object contributor = getContributor(path);
-		return getContribution(contributor, includeDetails);
+		Object contributor = getContributor(path, pathOffset);
+		T health = getContribution(group, contributor, includeDetails, isSystemHealth ? this.groups.getNames() : null);
+		return (health != null) ? new HealthResult<T>(health, group) : null;
 	}
 
 	@SuppressWarnings("unchecked")
-	private Object getContributor(String[] path) {
+	private Object getContributor(String[] path, int pathOffset) {
 		Object contributor = this.registry;
-		int pathOffset = 0;
 		while (pathOffset < path.length) {
 			if (!(contributor instanceof NamedContributors)) {
 				return null;
@@ -91,37 +94,70 @@ abstract class HealthEndpointSupport<C, T> {
 	}
 
 	@SuppressWarnings("unchecked")
-	private T getContribution(Object contributor, boolean includeDetails) {
+	private T getContribution(HealthEndpointGroup group, Object contributor, boolean includeDetails,
+			Set<String> groupNames) {
 		if (contributor instanceof NamedContributors) {
-			return getAggregateHealth((NamedContributors<C>) contributor, includeDetails);
+			return getAggregateHealth(group, (NamedContributors<C>) contributor, includeDetails, groupNames);
 		}
 		return (contributor != null) ? getHealth((C) contributor, includeDetails) : null;
 	}
 
-	private T getAggregateHealth(NamedContributors<C> namedContributors, boolean includeDetails) {
+	private T getAggregateHealth(HealthEndpointGroup group, NamedContributors<C> namedContributors,
+			boolean includeDetails, Set<String> groupNames) {
 		Map<String, T> contributions = new LinkedHashMap<>();
 		for (NamedContributor<C> namedContributor : namedContributors) {
 			String name = namedContributor.getName();
-			T contribution = getContribution(namedContributor.getContributor(), includeDetails);
-			contributions.put(name, contribution);
+			if (group.isMember(name)) {
+				T contribution = getContribution(group, namedContributor.getContributor(), includeDetails, null);
+				contributions.put(name, contribution);
+			}
 		}
 		if (contributions.isEmpty()) {
 			return null;
 		}
-		return aggregateContributions(contributions, this.settings.getStatusAggregator(), includeDetails);
+		return aggregateContributions(contributions, group.getStatusAggregator(), includeDetails, groupNames);
 	}
 
 	protected abstract T getHealth(C contributor, boolean includeDetails);
 
 	protected abstract T aggregateContributions(Map<String, T> contributions, StatusAggregator statusAggregator,
-			boolean includeDetails);
+			boolean includeDetails, Set<String> groupNames);
 
 	protected final CompositeHealth getCompositeHealth(Map<String, HealthComponent> components,
-			StatusAggregator statusAggregator, boolean includeDetails) {
+			StatusAggregator statusAggregator, boolean includeDetails, Set<String> groupNames) {
 		Status status = statusAggregator.getAggregateStatus(
 				components.values().stream().map(HealthComponent::getStatus).collect(Collectors.toSet()));
 		Map<String, HealthComponent> includedComponents = includeDetails ? components : null;
+		if (groupNames != null) {
+			return new SystemHealth(status, includedComponents, groupNames);
+		}
 		return new CompositeHealth(status, includedComponents);
 	}
 
+	/**
+	 * A health result containing health and the group that created it.
+	 *
+	 * @param <T> the contributed health component
+	 */
+	static class HealthResult<T> {
+
+		private final T health;
+
+		private final HealthEndpointGroup group;
+
+		HealthResult(T health, HealthEndpointGroup group) {
+			this.health = health;
+			this.group = group;
+		}
+
+		T getHealth() {
+			return this.health;
+		}
+
+		HealthEndpointGroup getGroup() {
+			return this.group;
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.health;
 
 import java.util.Map;
+import java.util.Set;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
@@ -47,7 +48,7 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<HealthCont
 	 * @param delegate the delegate endpoint
 	 * @param responseMapper the response mapper
 	 * @deprecated since 2.2.0 in favor of
-	 * {@link #HealthEndpointWebExtension(HealthContributorRegistry, HealthEndpointSettings)}
+	 * {@link #HealthEndpointWebExtension(HealthContributorRegistry, HealthEndpointGroups)}
 	 */
 	@Deprecated
 	public HealthEndpointWebExtension(HealthEndpoint delegate, HealthWebEndpointResponseMapper responseMapper) {
@@ -56,10 +57,10 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<HealthCont
 	/**
 	 * Create a new {@link HealthEndpointWebExtension} instance.
 	 * @param registry the health contributor registry
-	 * @param settings the health endpoint settings
+	 * @param groups the health endpoint groups
 	 */
-	public HealthEndpointWebExtension(HealthContributorRegistry registry, HealthEndpointSettings settings) {
-		super(registry, settings);
+	public HealthEndpointWebExtension(HealthContributorRegistry registry, HealthEndpointGroups groups) {
+		super(registry, groups);
 	}
 
 	@ReadOperation
@@ -75,11 +76,13 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<HealthCont
 
 	public WebEndpointResponse<HealthComponent> health(SecurityContext securityContext, boolean alwaysIncludeDetails,
 			String... path) {
-		HealthComponent health = getHealth(securityContext, alwaysIncludeDetails, path);
-		if (health == null) {
+		HealthResult<HealthComponent> result = getHealth(securityContext, alwaysIncludeDetails, path);
+		if (result == null) {
 			return new WebEndpointResponse<>(WebEndpointResponse.STATUS_NOT_FOUND);
 		}
-		int statusCode = getSettings().getHttpCodeStatusMapper().getStatusCode(health.getStatus());
+		HealthComponent health = result.getHealth();
+		HealthEndpointGroup group = result.getGroup();
+		int statusCode = group.getHttpCodeStatusMapper().getStatusCode(health.getStatus());
 		return new WebEndpointResponse<>(health, statusCode);
 	}
 
@@ -90,8 +93,8 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<HealthCont
 
 	@Override
 	protected HealthComponent aggregateContributions(Map<String, HealthComponent> contributions,
-			StatusAggregator statusAggregator, boolean includeDetails) {
-		return getCompositeHealth(contributions, statusAggregator, includeDetails);
+			StatusAggregator statusAggregator, boolean includeDetails, Set<String> groupNames) {
+		return getCompositeHealth(contributions, statusAggregator, includeDetails, groupNames);
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.health;
 
 import java.util.Map;
+import java.util.Set;
 
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
@@ -47,7 +48,7 @@ public class ReactiveHealthEndpointWebExtension
 	 * @param delegate the delegate health indicator
 	 * @param responseMapper the response mapper
 	 * @deprecated since 2.2.0 in favor of
-	 * {@link #ReactiveHealthEndpointWebExtension(ReactiveHealthContributorRegistry, HealthEndpointSettings)}
+	 * {@link #ReactiveHealthEndpointWebExtension(ReactiveHealthContributorRegistry, HealthEndpointGroups)}
 	 */
 	@Deprecated
 	public ReactiveHealthEndpointWebExtension(ReactiveHealthIndicator delegate,
@@ -57,11 +58,10 @@ public class ReactiveHealthEndpointWebExtension
 	/**
 	 * Create a new {@link ReactiveHealthEndpointWebExtension} instance.
 	 * @param registry the health contributor registry
-	 * @param settings the health endpoint settings
+	 * @param groups the health endpoint groups
 	 */
-	public ReactiveHealthEndpointWebExtension(ReactiveHealthContributorRegistry registry,
-			HealthEndpointSettings settings) {
-		super(registry, settings);
+	public ReactiveHealthEndpointWebExtension(ReactiveHealthContributorRegistry registry, HealthEndpointGroups groups) {
+		super(registry, groups);
 	}
 
 	@ReadOperation
@@ -77,12 +77,13 @@ public class ReactiveHealthEndpointWebExtension
 
 	public Mono<WebEndpointResponse<? extends HealthComponent>> health(SecurityContext securityContext,
 			boolean alwaysIncludeDetails, String... path) {
-		Mono<? extends HealthComponent> result = getHealth(securityContext, alwaysIncludeDetails, path);
+		HealthResult<Mono<? extends HealthComponent>> result = getHealth(securityContext, alwaysIncludeDetails, path);
 		if (result == null) {
 			return Mono.just(new WebEndpointResponse<>(WebEndpointResponse.STATUS_NOT_FOUND));
 		}
-		return result.map((health) -> {
-			int statusCode = getSettings().getHttpCodeStatusMapper().getStatusCode(health.getStatus());
+		HealthEndpointGroup group = result.getGroup();
+		return result.getHealth().map((health) -> {
+			int statusCode = group.getHttpCodeStatusMapper().getStatusCode(health.getStatus());
 			return new WebEndpointResponse<>(health, statusCode);
 		});
 	}
@@ -95,10 +96,10 @@ public class ReactiveHealthEndpointWebExtension
 	@Override
 	protected Mono<? extends HealthComponent> aggregateContributions(
 			Map<String, Mono<? extends HealthComponent>> contributions, StatusAggregator statusAggregator,
-			boolean includeDetails) {
+			boolean includeDetails, Set<String> groupNames) {
 		return Flux.fromIterable(contributions.entrySet()).flatMap(NamedHealthComponent::create)
 				.collectMap(NamedHealthComponent::getName, NamedHealthComponent::getHealth)
-				.map((components) -> this.getCompositeHealth(components, statusAggregator, includeDetails));
+				.map((components) -> this.getCompositeHealth(components, statusAggregator, includeDetails, groupNames));
 	}
 
 	/**

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/SystemHealth.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.health;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+
+/**
+ * A {@link HealthComponent} that represents the overall system health and the available
+ * groups.
+ *
+ * @author Phillip Webb
+ * @since 2.2.0
+ */
+public final class SystemHealth extends CompositeHealth {
+
+	private final Set<String> groups;
+
+	SystemHealth(Status status, Map<String, HealthComponent> instances, Set<String> groups) {
+		super(status, instances);
+		this.groups = (groups != null) ? new TreeSet<>(groups) : null;
+	}
+
+	@JsonInclude(Include.NON_EMPTY)
+	public Set<String> getGroups() {
+		return this.groups;
+	}
+
+}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/HealthEndpointGroupsTests.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.health;
+
+import java.util.Collections;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link HealthEndpointGroups}.
+ *
+ * @author Phillip Webb
+ */
+class HealthEndpointGroupsTests {
+
+	@Test
+	void ofWhenPrimaryIsNullThrowsException() {
+		assertThatIllegalArgumentException().isThrownBy(() -> HealthEndpointGroups.of(null, Collections.emptyMap()))
+				.withMessage("Primary must not be null");
+	}
+
+	@Test
+	void ofWhenAdditionalIsNullThrowsException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> HealthEndpointGroups.of(mock(HealthEndpointGroup.class), null))
+				.withMessage("Additional must not be null");
+	}
+
+	@Test
+	void ofReturnsHealthEndpointGroupsInstance() {
+		HealthEndpointGroup primary = mock(HealthEndpointGroup.class);
+		HealthEndpointGroup group = mock(HealthEndpointGroup.class);
+		HealthEndpointGroups groups = HealthEndpointGroups.of(primary, Collections.singletonMap("group", group));
+		assertThat(groups.getPrimary()).isSameAs(primary);
+		assertThat(groups.getNames()).containsExactly("group");
+		assertThat(groups.get("group")).isSameAs(group);
+		assertThat(groups.get("missing")).isNull();
+	}
+
+}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/HealthEndpointSupportTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.actuate.health;
 
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -24,6 +25,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.MockitoAnnotations;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
+import org.springframework.boot.actuate.health.HealthEndpointSupport.HealthResult;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
@@ -44,7 +46,12 @@ abstract class HealthEndpointSupportTests<R extends ContributorRegistry<C>, C, T
 
 	final Health down = Health.down().build();
 
-	final TestHealthEndpointSettings settings = new TestHealthEndpointSettings();
+	final TestHealthEndpointGroup primaryGroup = new TestHealthEndpointGroup();
+
+	final TestHealthEndpointGroup allTheAs = new TestHealthEndpointGroup((name) -> name.startsWith("a"));
+
+	final HealthEndpointGroups groups = HealthEndpointGroups.of(this.primaryGroup,
+			Collections.singletonMap("alltheas", this.allTheAs));
 
 	HealthEndpointSupportTests() {
 		this.registry = createRegistry();
@@ -57,65 +64,76 @@ abstract class HealthEndpointSupportTests<R extends ContributorRegistry<C>, C, T
 
 	@Test
 	void createWhenRegistryIsNullThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> create(null, this.settings))
+		assertThatIllegalArgumentException().isThrownBy(() -> create(null, this.groups))
 				.withMessage("Registry must not be null");
 	}
 
 	@Test
-	void createWhenSettingsIsNullThrowsException() {
+	void createWhenGroupsIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> create(this.registry, null))
-				.withMessage("Settings must not be null");
+				.withMessage("Groups must not be null");
 	}
 
 	@Test
-	void getHealthWhenPathIsEmptyReturnsHealth() {
+	void getHealthResultWhenPathIsEmptyUsesPrimaryGroup() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, false);
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false);
+		assertThat(result.getGroup()).isEqualTo(this.primaryGroup);
 		assertThat(getHealth(result)).isNotSameAs(this.up);
 		assertThat(getHealth(result).getStatus()).isEqualTo(Status.UP);
 	}
 
 	@Test
-	void getHealthWhenHasPathReturnsSubResult() {
+	void getHealthResultWhenPathIsNotGroupReturnsResultFromPrimaryGroup() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, false, "test");
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false, "test");
+		assertThat(result.getGroup()).isEqualTo(this.primaryGroup);
 		assertThat(getHealth(result)).isEqualTo(this.up);
 
 	}
 
 	@Test
-	void getHealthWhenAlwaysIncludesDetailsIsFalseAndSettingsIsTrueIncludesDetails() {
+	void getHealthResultWhenPathIsGroupReturnsResultFromGroup() {
+		this.registry.registerContributor("atest", createContributor(this.up));
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false, "alltheas",
+				"atest");
+		assertThat(result.getGroup()).isEqualTo(this.allTheAs);
+		assertThat(getHealth(result)).isEqualTo(this.up);
+	}
+
+	@Test
+	void getHealthResultWhenAlwaysIncludesDetailsIsFalseAndGroupIsTrueIncludesDetails() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, false, "test");
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false, "test");
 		assertThat(((Health) getHealth(result)).getDetails()).containsEntry("spring", "boot");
 	}
 
 	@Test
-	void getHealthWhenAlwaysIncludesDetailsIsFalseAndSettingsIsFalseIncludesNoDetails() {
-		this.settings.setIncludeDetails(false);
+	void getHealthResultWhenAlwaysIncludesDetailsIsFalseAndGroupIsFalseIncludesNoDetails() {
+		this.primaryGroup.setIncludeDetails(false);
 		this.registry.registerContributor("test", createContributor(this.up));
-		HealthEndpointSupport<C, T> endpoint = create(this.registry, this.settings);
-		T rootResult = endpoint.getHealth(SecurityContext.NONE, false);
-		T componentResult = endpoint.getHealth(SecurityContext.NONE, false, "test");
+		HealthEndpointSupport<C, T> endpoint = create(this.registry, this.groups);
+		HealthResult<T> rootResult = endpoint.getHealth(SecurityContext.NONE, false);
+		HealthResult<T> componentResult = endpoint.getHealth(SecurityContext.NONE, false, "test");
 		assertThat(((CompositeHealth) getHealth(rootResult)).getStatus()).isEqualTo(Status.UP);
 		assertThat(componentResult).isNull();
 	}
 
 	@Test
-	void getHealthWhenAlwaysIncludesDetailsIsTrueIncludesDetails() {
-		this.settings.setIncludeDetails(false);
+	void getHealthResultWhenAlwaysIncludesDetailsIsTrueIncludesDetails() {
+		this.primaryGroup.setIncludeDetails(false);
 		this.registry.registerContributor("test", createContributor(this.up));
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, true, "test");
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, true, "test");
 		assertThat(((Health) getHealth(result)).getDetails()).containsEntry("spring", "boot");
 	}
 
 	@Test
-	void getHealthWhenCompositeReturnsAggregateResult() {
+	void getHealthResultWhenCompositeReturnsAggregateResult() {
 		Map<String, C> contributors = new LinkedHashMap<>();
 		contributors.put("a", createContributor(this.up));
 		contributors.put("b", createContributor(this.down));
 		this.registry.registerContributor("test", createCompositeContributor(contributors));
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, false);
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false);
 		CompositeHealth root = (CompositeHealth) getHealth(result);
 		CompositeHealth component = (CompositeHealth) root.getDetails().get("test");
 		assertThat(root.getStatus()).isEqualTo(Status.DOWN);
@@ -124,12 +142,26 @@ abstract class HealthEndpointSupportTests<R extends ContributorRegistry<C>, C, T
 	}
 
 	@Test
-	void getHealthWhenPathDoesNotExistReturnsNull() {
-		T result = create(this.registry, this.settings).getHealth(SecurityContext.NONE, false, "missing");
+	void getHealthResultWhenPathDoesNotExistReturnsNull() {
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false, "missing");
 		assertThat(result).isNull();
 	}
 
-	protected abstract HealthEndpointSupport<C, T> create(R registry, HealthEndpointSettings settings);
+	@Test
+	void getHealthResultWhenPathIsEmptyIncludesGroups() {
+		this.registry.registerContributor("test", createContributor(this.up));
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false);
+		assertThat(((SystemHealth) getHealth(result)).getGroups()).containsOnly("alltheas");
+	}
+
+	@Test
+	void getHealthResultWhenPathIsGroupDoesNotIncludesGroups() {
+		this.registry.registerContributor("atest", createContributor(this.up));
+		HealthResult<T> result = create(this.registry, this.groups).getHealth(SecurityContext.NONE, false, "alltheas");
+		assertThat(getHealth(result)).isNotInstanceOf(SystemHealth.class);
+	}
+
+	protected abstract HealthEndpointSupport<C, T> create(R registry, HealthEndpointGroups groups);
 
 	protected abstract R createRegistry();
 
@@ -137,6 +169,6 @@ abstract class HealthEndpointSupportTests<R extends ContributorRegistry<C>, C, T
 
 	protected abstract C createCompositeContributor(Map<String, C> contributors);
 
-	protected abstract HealthComponent getHealth(T result);
+	protected abstract HealthComponent getHealth(HealthResult<T> result);
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/HealthEndpointTests.java

@@ -20,6 +20,8 @@ import java.util.Map;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.actuate.health.HealthEndpointSupport.HealthResult;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
 import static org.mockito.Mockito.mock;
@@ -42,30 +44,30 @@ class HealthEndpointTests
 	}
 
 	@Test
-	void healthReturnsCompositeHealth() {
+	void healthReturnsSystemHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		HealthComponent health = create(this.registry, this.settings).health();
+		HealthComponent health = create(this.registry, this.groups).health();
 		assertThat(health.getStatus()).isEqualTo(Status.UP);
-		assertThat(health).isInstanceOf(CompositeHealth.class);
+		assertThat(health).isInstanceOf(SystemHealth.class);
 	}
 
 	@Test
 	void healthWhenPathDoesNotExistReturnsNull() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		HealthComponent health = create(this.registry, this.settings).healthForPath("missing");
+		HealthComponent health = create(this.registry, this.groups).healthForPath("missing");
 		assertThat(health).isNull();
 	}
 
 	@Test
 	void healthWhenPathExistsReturnsHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		HealthComponent health = create(this.registry, this.settings).healthForPath("test");
+		HealthComponent health = create(this.registry, this.groups).healthForPath("test");
 		assertThat(health).isEqualTo(this.up);
 	}
 
 	@Override
-	protected HealthEndpoint create(HealthContributorRegistry registry, HealthEndpointSettings settings) {
-		return new HealthEndpoint(registry, settings);
+	protected HealthEndpoint create(HealthContributorRegistry registry, HealthEndpointGroups groups) {
+		return new HealthEndpoint(registry, groups);
 	}
 
 	@Override
@@ -84,8 +86,8 @@ class HealthEndpointTests
 	}
 
 	@Override
-	protected HealthComponent getHealth(HealthComponent result) {
-		return result;
+	protected HealthComponent getHealth(HealthResult<HealthComponent> result) {
+		return result.getHealth();
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/HealthEndpointWebExtensionTests.java

@@ -22,6 +22,7 @@ import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 import org.springframework.boot.actuate.endpoint.web.WebEndpointResponse;
+import org.springframework.boot.actuate.health.HealthEndpointSupport.HealthResult;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
@@ -49,19 +50,18 @@ class HealthEndpointWebExtensionTests
 	@Test
 	void healthReturnsSystemHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<HealthComponent> response = create(this.registry, this.settings)
-				.health(SecurityContext.NONE);
+		WebEndpointResponse<HealthComponent> response = create(this.registry, this.groups).health(SecurityContext.NONE);
 		HealthComponent health = response.getBody();
 		assertThat(health.getStatus()).isEqualTo(Status.UP);
-		assertThat(health).isInstanceOf(CompositeHealth.class);
+		assertThat(health).isInstanceOf(SystemHealth.class);
 		assertThat(response.getStatus()).isEqualTo(200);
 	}
 
 	@Test
 	void healthWhenPathDoesNotExistReturnsHttp404() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<HealthComponent> response = create(this.registry, this.settings)
-				.health(SecurityContext.NONE, "missing");
+		WebEndpointResponse<HealthComponent> response = create(this.registry, this.groups).health(SecurityContext.NONE,
+				"missing");
 		assertThat(response.getBody()).isNull();
 		assertThat(response.getStatus()).isEqualTo(404);
 	}
@@ -69,15 +69,15 @@ class HealthEndpointWebExtensionTests
 	@Test
 	void healthWhenPathExistsReturnsHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<HealthComponent> response = create(this.registry, this.settings)
-				.health(SecurityContext.NONE, "test");
+		WebEndpointResponse<HealthComponent> response = create(this.registry, this.groups).health(SecurityContext.NONE,
+				"test");
 		assertThat(response.getBody()).isEqualTo(this.up);
 		assertThat(response.getStatus()).isEqualTo(200);
 	}
 
 	@Override
-	protected HealthEndpointWebExtension create(HealthContributorRegistry registry, HealthEndpointSettings settings) {
-		return new HealthEndpointWebExtension(registry, settings);
+	protected HealthEndpointWebExtension create(HealthContributorRegistry registry, HealthEndpointGroups groups) {
+		return new HealthEndpointWebExtension(registry, groups);
 	}
 
 	@Override
@@ -96,8 +96,8 @@ class HealthEndpointWebExtensionTests
 	}
 
 	@Override
-	protected HealthComponent getHealth(HealthComponent result) {
-		return result;
+	protected HealthComponent getHealth(HealthResult<HealthComponent> result) {
+		return result.getHealth();
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/HealthEndpointWebIntegrationTests.java

@@ -156,28 +156,30 @@ class HealthEndpointWebIntegrationTests {
 
 		@Bean
 		HealthEndpoint healthEndpoint(HealthContributorRegistry healthContributorRegistry,
-				HealthEndpointSettings healthEndpointSettings) {
-			return new HealthEndpoint(healthContributorRegistry, healthEndpointSettings);
+				HealthEndpointGroups healthEndpointGroups) {
+			return new HealthEndpoint(healthContributorRegistry, healthEndpointGroups);
 		}
 
 		@Bean
 		@ConditionalOnWebApplication(type = Type.SERVLET)
 		HealthEndpointWebExtension healthWebEndpointExtension(HealthContributorRegistry healthContributorRegistry,
-				HealthEndpointSettings healthEndpointSettings) {
-			return new HealthEndpointWebExtension(healthContributorRegistry, healthEndpointSettings);
+				HealthEndpointGroups healthEndpointGroups) {
+			return new HealthEndpointWebExtension(healthContributorRegistry, healthEndpointGroups);
 		}
 
 		@Bean
 		@ConditionalOnWebApplication(type = Type.REACTIVE)
 		ReactiveHealthEndpointWebExtension reactiveHealthWebEndpointExtension(
 				ReactiveHealthContributorRegistry reactiveHealthContributorRegistry,
-				HealthEndpointSettings healthEndpointSettings) {
-			return new ReactiveHealthEndpointWebExtension(reactiveHealthContributorRegistry, healthEndpointSettings);
+				HealthEndpointGroups healthEndpointGroups) {
+			return new ReactiveHealthEndpointWebExtension(reactiveHealthContributorRegistry, healthEndpointGroups);
 		}
 
 		@Bean
-		HealthEndpointSettings healthEndpointSettings() {
-			return new TestHealthEndpointSettings();
+		HealthEndpointGroups healthEndpointGroups() {
+			TestHealthEndpointGroup primary = new TestHealthEndpointGroup();
+			TestHealthEndpointGroup allTheAs = new TestHealthEndpointGroup((name) -> name.startsWith("a"));
+			return HealthEndpointGroups.of(primary, Collections.singletonMap("alltheas", allTheAs));
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtensionTests.java

@@ -23,6 +23,7 @@ import reactor.core.publisher.Mono;
 
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 import org.springframework.boot.actuate.endpoint.web.WebEndpointResponse;
+import org.springframework.boot.actuate.health.HealthEndpointSupport.HealthResult;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
@@ -50,18 +51,18 @@ class ReactiveHealthEndpointWebExtensionTests extends
 	@Test
 	void healthReturnsSystemHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.settings)
+		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.groups)
 				.health(SecurityContext.NONE).block();
 		HealthComponent health = response.getBody();
 		assertThat(health.getStatus()).isEqualTo(Status.UP);
-		assertThat(health).isInstanceOf(CompositeHealth.class);
+		assertThat(health).isInstanceOf(SystemHealth.class);
 		assertThat(response.getStatus()).isEqualTo(200);
 	}
 
 	@Test
 	void healthWhenPathDoesNotExistReturnsHttp404() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.settings)
+		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.groups)
 				.health(SecurityContext.NONE, "missing").block();
 		assertThat(response.getBody()).isNull();
 		assertThat(response.getStatus()).isEqualTo(404);
@@ -70,7 +71,7 @@ class ReactiveHealthEndpointWebExtensionTests extends
 	@Test
 	void healthWhenPathExistsReturnsHealth() {
 		this.registry.registerContributor("test", createContributor(this.up));
-		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.settings)
+		WebEndpointResponse<? extends HealthComponent> response = create(this.registry, this.groups)
 				.health(SecurityContext.NONE, "test").block();
 		assertThat(response.getBody()).isEqualTo(this.up);
 		assertThat(response.getStatus()).isEqualTo(200);
@@ -78,8 +79,8 @@ class ReactiveHealthEndpointWebExtensionTests extends
 
 	@Override
 	protected ReactiveHealthEndpointWebExtension create(ReactiveHealthContributorRegistry registry,
-			HealthEndpointSettings settings) {
-		return new ReactiveHealthEndpointWebExtension(registry, settings);
+			HealthEndpointGroups groups) {
+		return new ReactiveHealthEndpointWebExtension(registry, groups);
 	}
 
 	@Override
@@ -99,8 +100,8 @@ class ReactiveHealthEndpointWebExtensionTests extends
 	}
 
 	@Override
-	protected HealthComponent getHealth(Mono<? extends HealthComponent> result) {
-		return result.block();
+	protected HealthComponent getHealth(HealthResult<Mono<? extends HealthComponent>> result) {
+		return result.getHealth().block();
 	}
 
 }

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/SystemHealthTests.java

+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.health;
+
+import java.util.Arrays;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Set;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link SystemHealth}.
+ *
+ * @author Phillip Webb
+ */
+class SystemHealthTests {
+
+	@Test
+	void serializeWithJacksonReturnsValidJson() throws Exception {
+		Map<String, HealthComponent> components = new LinkedHashMap<>();
+		components.put("db1", Health.up().build());
+		components.put("db2", Health.down().withDetail("a", "b").build());
+		Set<String> groups = new LinkedHashSet<>(Arrays.asList("liveness", "readiness"));
+		CompositeHealth health = new SystemHealth(Status.UP, components, groups);
+		ObjectMapper mapper = new ObjectMapper();
+		String json = mapper.writeValueAsString(health);
+		assertThat(json).isEqualTo("{\"status\":\"UP\",\"details\":{" + "\"db1\":{\"status\":\"UP\"},"
+				+ "\"db2\":{\"status\":\"DOWN\",\"details\":{\"a\":\"b\"}}},"
+				+ "\"groups\":[\"liveness\",\"readiness\"]}");
+	}
+
+}

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/TestHealthEndpointSettings.java → spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/health/TestHealthEndpointGroup.java

@@ -16,21 +16,38 @@
 
 package org.springframework.boot.actuate.health;
 
+import java.util.function.Predicate;
+
 import org.springframework.boot.actuate.endpoint.SecurityContext;
 
 /**
- * Test implementation of {@link HealthEndpointSettings}.
+ * Test implementation of {@link HealthEndpointGroups}.
  *
  * @author Phillip Webb
  */
-class TestHealthEndpointSettings implements HealthEndpointSettings {
+class TestHealthEndpointGroup implements HealthEndpointGroup {
 
 	private final StatusAggregator statusAggregator = new SimpleStatusAggregator();
 
 	private final HttpCodeStatusMapper httpCodeStatusMapper = new SimpleHttpCodeStatusMapper();
 
+	private final Predicate<String> memberPredicate;
+
 	private boolean includeDetails = true;
 
+	TestHealthEndpointGroup() {
+		this((name) -> true);
+	}
+
+	TestHealthEndpointGroup(Predicate<String> memberPredicate) {
+		this.memberPredicate = memberPredicate;
+	}
+
+	@Override
+	public boolean isMember(String name) {
+		return this.memberPredicate.test(name);
+	}
+
 	@Override
 	public boolean includeDetails(SecurityContext securityContext) {
 		return this.includeDetails;

spring-boot-project/spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -951,6 +951,42 @@ TIP: If necessary, reactive indicators replace the regular ones. Also, any
 
 
 
+==== Health Groups
+It's sometimes useful to organize health indicators into groups that can be used for
+different purposes. For example, if you deploy your application to Kubernetes, you may
+want one different sets of health indicators for your "`liveness`" and "`readiness`"
+probes.
+
+To create a health indicator group you can use the `management.endpoint.health.group.<name>`
+property and specify a list of health indicator IDs to `include` or `exclude`. For example,
+to create a group that includes only database indicators you can define the following:
+
+[source,properties,indent=0]
+----
+	management.endpoint.health.group.custom.include=db
+----
+
+You can then check the result by hitting `http://localhost:8080/actuator/health/custom`.
+
+By default groups will inherit the same `StatusAggregator` and `HttpCodeStatusMapper`
+settings as the system health, however, these can also be defined on a per-group
+basis. It's also possible to override the `show-details` and `roles` properties
+if required:
+
+[source,properties,indent=0]
+----
+	management.endpoint.health.group.custom.show-details=when-authorized
+	management.endpoint.health.group.custom.roles=admin
+	management.endpoint.health.group.custom.status.order=fatal,up
+	management.endpoint.health.group.custom.status.http-mapping.fatal=500
+
+----
+
+TIP: You can use `@Qualifier("groupname")` if you need to register custom
+`StatusAggregator` or `HttpCodeStatusMapper` beans for use with the group.
+
+
+
 [[production-ready-application-info]]
 === Application Information
 Application information exposes various information collected from all

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-actuator/src/main/resources/application.properties

@@ -19,3 +19,8 @@ spring.jmx.enabled=true
 spring.jackson.serialization.write_dates_as_timestamps=false
 
 management.trace.http.include=request-headers,response-headers,principal,remote-address,session-id
+
+management.endpoint.health.show-details=always
+management.endpoint.health.group.ready.include=db,diskSpace
+management.endpoint.health.group.live.include=example,hello,db
+management.endpoint.health.group.live.show-details=never

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-actuator/src/test/java/smoketest/actuator/ManagementPortAndPathSampleActuatorApplicationTests.java

@@ -75,7 +75,7 @@ class ManagementPortAndPathSampleActuatorApplicationTests {
 		ResponseEntity<String> entity = new TestRestTemplate().withBasicAuth("user", getPassword())
 				.getForEntity("http://localhost:" + this.managementPort + "/admin/health", String.class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-		assertThat(entity.getBody()).isEqualTo("{\"status\":\"UP\"}");
+		assertThat(entity.getBody()).isEqualTo("{\"status\":\"UP\",\"groups\":[\"live\",\"ready\"]}");
 	}
 
 	@Test