# Common application properties

## Appendix A: Common application properties

Various properties can be specified inside your `application.properties` file, inside your `application.yml` file, or as command line switches. This appendix provides a list of common Spring Cloud Commons properties and references to the underlying classes that consume them.

| Property contributions can come from additional jar files on your classpath, so you should not consider this an exhaustive list. Also, you can define your own properties.

Name | Default | Description
--- | --- | ---
spring.cloud.compatibility-verifier.compatible-boot-versions |  | Default accepted versions for the Spring Boot dependency. You can set {@code x} for the patch version if you don’t want to specify a concrete value. Example: {@code 3.4.x}
spring.cloud.compatibility-verifier.enabled | false | Enables creation of Spring Cloud compatibility verification.
spring.cloud.config.allow-override | true | Flag to indicate that {@link #isOverrideSystemProperties() systemPropertiesOverride} can be used. Set to false to prevent users from changing the default accidentally. Default true.
spring.cloud.config.override-none | false | Flag to indicate that when {@link #setAllowOverride(boolean) allowOverride} is true, external properties should take lowest priority and should not override any existing property sources (including local config files). Default false.
spring.cloud.config.override-system-properties | true | Flag to indicate that the external properties should override system properties. Default true.
spring.cloud.discovery.client.composite-indicator.enabled | true | Enables discovery client composite health indicator.
spring.cloud.discovery.client.health-indicator.enabled | true |
spring.cloud.discovery.client.health-indicator.include-description | false |
spring.cloud.discovery.client.simple.instances |  |
spring.cloud.discovery.client.simple.local.instance-id |  | The unique identifier or name for the service instance.
spring.cloud.discovery.client.simple.local.metadata |  | Metadata for the service instance. Can be used by discovery clients to modify their behaviour per instance, e.g. when load balancing.
spring.cloud.discovery.client.simple.local.service-id |  | The identifier or name for the service. Multiple instances might share the same service ID.
spring.cloud.discovery.client.simple.local.uri |  | The URI of the service instance. Will be parsed to extract the scheme, host, and port.
spring.cloud.discovery.client.simple.order |  |
spring.cloud.discovery.enabled | true | Enables discovery client health indicators.
spring.cloud.features.enabled | true | Enables the features endpoint.
spring.cloud.httpclientfactories.apache.enabled | true | Enables creation of Apache Http Client factory beans.
spring.cloud.httpclientfactories.ok.enabled | true | Enables creation of OK Http Client factory beans.
spring.cloud.hypermedia.refresh.fixed-delay | 5000 |
spring.cloud.hypermedia.refresh.initial-delay | 10000 |
spring.cloud.inetutils.default-hostname | localhost | The default hostname. Used in case of errors.
spring.cloud.inetutils.default-ip-address | 127.0.0.1 | The default IP address. Used in case of errors.
spring.cloud.inetutils.ignored-interfaces |  | List of Java regular expressions for network interfaces that will be ignored.
spring.cloud.inetutils.preferred-networks |  | List of Java regular expressions for network addresses that will be preferred.
spring.cloud.inetutils.timeout-seconds | 1 | Timeout, in seconds, for calculating hostname.
spring.cloud.inetutils.use-only-site-local-interfaces | false | Whether to use only interfaces with site local addresses. See {@link InetAddress#isSiteLocalAddress()} for more details.
spring.cloud.loadbalancer.cache.caffeine.spec |  | The spec to use to create caches. See CaffeineSpec for more details on the spec format.
spring.cloud.loadbalancer.cache.capacity | 256 | Initial cache capacity expressed as int.
spring.cloud.loadbalancer.cache.enabled | true | Enables Spring Cloud LoadBalancer caching mechanism.

spring.cloud.loadbalancer.cache.ttl

35s

Time To Live - time counted from writing of the record, after which cache entries are expired, expressed as a {@link Duration}. The property {@link String} has to be in keeping with the appropriate syntax as specified in Spring Boot <code>StringToDurationConverter</code>. @see <a href= "https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/StringToDurationConverter.java">StringToDurationConverter.java</a>

spring.cloud.loadbalancer.health-check.initial-delay |  | Initial delay value for the HealthCheck scheduler.
spring.cloud.loadbalancer.health-check.interval | 25s | Interval for rerunning the HealthCheck scheduler.
spring.cloud.loadbalancer.health-check.path |  |
spring.cloud.loadbalancer.retry.enabled | true |
spring.cloud.loadbalancer.ribbon.enabled | true | Causes `RibbonLoadBalancerClient` to be used by default.
spring.cloud.loadbalancer.service-discovery.timeout |  | String representation of Duration of the timeout for calls to service discovery.
spring.cloud.loadbalancer.zone |  | Spring Cloud LoadBalancer zone.
spring.cloud.refresh.enabled | true | Enables autoconfiguration for the refresh scope and associated features.
spring.cloud.refresh.extra-refreshable | true | Additional class names for beans to post process into refresh scope.
spring.cloud.refresh.never-refreshable | true | Comma separated list of class names for beans to never be refreshed or rebound.
spring.cloud.service-registry.auto-registration.enabled | true | Whether service auto-registration is enabled. Defaults to true.
spring.cloud.service-registry.auto-registration.fail-fast | false | Whether startup fails if there is no AutoServiceRegistration. Defaults to false.
spring.cloud.service-registry.auto-registration.register-management | true | Whether to register the management as a service. Defaults to true.
spring.cloud.util.enabled | true | Enables creation of Spring Cloud utility beans.