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Remove duplicated examples, remove JKube dependency (#1137)

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Co-authored-by: Ryan Baxter <524254+ryanjbaxter@users.noreply.github.com>
This commit is contained in:
Ryan Baxter
2022-11-11 07:58:51 -05:00
committed by GitHub
parent ec9ecb2818
commit 812ddf1967
40 changed files with 83 additions and 1678 deletions
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1
pom.xml
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@@ -73,7 +73,6 @@
<maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
<maven-failsafe-plugin.version>2.22.2</maven-failsafe-plugin.version>
<maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
<kubernetes.maven.plugin.version>1.6.0</kubernetes.maven.plugin.version>
<groovy.version>2.4.12</groovy.version>
<restassured.version>3.0.2</restassured.version>

0
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/.jdk8
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58
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/README.md
View File

@@ -1,58 +0,0 @@
# Setting up the Environment
To play with these examples, you can install locally Kubernetes & Docker using [Minikube](https://minikube.sigs.k8s.io/docs/start/) within a Virtual Machine
managed by a hypervisor (Xhyve, Virtualbox or KVM) if your machine is not a native Unix operating system.
When the minikube is installed on your machine, you can start kubernetes using this command:
```
minikube start
```
You also probably want to configure your Docker client to point the minikube Docker daemon with:
```
eval $(minikube docker-env)
```
This will make sure the Docker images that you build are available to the minikube environment.
# Hello World Example
This Spring Boot application exposes an endpoint that we can call to receive a `Hello World` message as response. The application is configured using the
@RestController, and the method returning the message is annotated with `@RequestMapping("/")`.
The uberjar of the Spring Boot application is packaged within a Docker image using the [Fabric8 Maven plugin](https://maven.fabric8.io) and next deployed top of the Kubernetes management platform as a pod
using the replication controller created by the plugin.
Once you have the environment set up (minikube or kubectl configured against a kubernetes cluster), you can play with this Spring Boot application in the cloud using the following maven command to deploy it:
```
mvn clean package fabric8:deploy -Pkubernetes
```
**Note**: Unfortunately, when you deploy using the fabric8 plugin, the readiness and liveness probes fail to point to the right actuator URL due a lack of support for Spring Boot.
This push you to edit the generated deployment inside kubernetes and change these probes which points to "path": "/health" to "path": "/actuator/health".
This will make your deployment go green. This issue is already reported into the fabric8 community: https://github.com/fabric8io/fabric8-maven-plugin/issues/1178
When the application has been deployed, you can access its service or endpoint url using this command:
```
minikube service kubernetes-hello-world --url
```
And next you can curl the endpoint using the url returned by the previous command
```
curl https://IP_OR_HOSTNAME/
```
then
```
curl https://IP_OR_HOSTNAME/services
```
Should return you the list of available services discovered by the DiscoveryClient
```
mvn clean install -Pintegration
```

231
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/pom.xml
View File

@@ -1,231 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spring-cloud-kubernetes-examples</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>3.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>kubernetes-hello-world</artifactId>
<name>Spring Cloud Kubernetes :: Examples :: Hello World</name>
<description>A simple example that demonstrates how to build and test a basic spring
cloud kubernetes app
</description>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<type>pom</type>
<scope>import</scope>
<version>${spring-boot.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-kubernetes-fabric8-autoconfig</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-kubernetes-fabric8-discovery</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-commons</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- Testing -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<!--skip deploy -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>${maven-deploy-plugin.version}</version>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<skipTests>true</skipTests>
<!-- Workaround for https://issues.apache.org/jira/browse/SUREFIRE-1588 -->
<useSystemClassLoader>false</useSystemClassLoader>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>kubernetes</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
<configuration>
<enricher>
<config>
<jkube-service>
<type>NodePort</type>
</jkube-service>
</config>
</enricher>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>release</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>helm</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<executions>
<execution>
<id>run-integration-tests</id>
<phase>integration-test</phase>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<skipTests>false</skipTests>
<skipITs>false</skipITs>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>

34
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/src/main/java/org/springframework/cloud/kubernetes/examples/App.java
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@@ -1,34 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
*
*/
@SpringBootApplication
@EnableDiscoveryClient
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}

47
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/src/main/java/org/springframework/cloud/kubernetes/examples/HelloController.java
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@@ -1,47 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
private static final Log log = LogFactory.getLog(HelloController.class);
@Autowired
private DiscoveryClient discoveryClient;
@RequestMapping("/")
public String hello() {
return "Hello World";
}
@RequestMapping("/services")
public List<String> services() {
return this.discoveryClient.getServices();
}
}

1
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/src/main/resources/application.properties
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@@ -1 +0,0 @@
spring.application.name=hello-world-example

45
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/src/test/java/org/springframework/cloud/kubernetes/examples/ApplicationTestIT.java
View File

@@ -1,45 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;
import static org.assertj.core.api.Assertions.assertThat;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = App.class)
public class ApplicationTestIT {
@Autowired
private ApplicationContext context;
/*
* This test proves that the application can be loaded successful and that
* all @configurations and dependencies are there
*/
@Test
public void contextLoads() throws Exception {
assertThat(this.context).isNotNull();
}
}

15
spring-cloud-kubernetes-examples/kubernetes-hello-world-example/src/test/resources/logback-test.xml
View File

@@ -1,15 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoders are assigned the type
ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<root level="info">
<appender-ref ref="STDOUT"/>
</root>
</configuration>

85
spring-cloud-kubernetes-examples/kubernetes-leader-election-example/README.md
View File

@@ -35,9 +35,90 @@ kubectl apply -f leader-role.yml
kubectl apply -f leader-rolebinding.yml
```
Now build and deploy the application:
Build an image using the Spring Boot Build Image Plugin
```
mvn clean fabric8:deploy -Pkubernetes
./mvnw spring-boot:build-image -Dspring-boot.build-image.imageName=org/kubernetes-leader-election-example
```
You can then deploy the application using the following yaml.
```yaml
---
apiVersion: v1
kind: List
items:
- apiVersion: v1
kind: Service
metadata:
labels:
app: kubernetes-leader-election-example
name: kubernetes-leader-election-example
spec:
ports:
- name: http
port: 80
targetPort: 8080
selector:
app: kubernetes-leader-election-example
type: ClusterIP
- apiVersion: v1
kind: ServiceAccount
metadata:
labels:
app: kubernetes-leader-election-example
name: kubernetes-leader-election-example
- apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
app: kubernetes-leader-election-example
name: kubernetes-leader-election-example:view
roleRef:
kind: Role
apiGroup: rbac.authorization.k8s.io
name: namespace-reader
subjects:
- kind: ServiceAccount
name: kubernetes-leader-election-example
- apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
namespace: default
name: namespace-reader
rules:
- apiGroups: ["", "extensions", "apps"]
resources: ["configmaps", "pods", "services", "endpoints", "secrets"]
verbs: ["get", "list", "watch"]
- apiVersion: apps/v1
kind: Deployment
metadata:
name: kubernetes-leader-election-example
spec:
selector:
matchLabels:
app: kubernetes-leader-election-example
template:
metadata:
labels:
app: kubernetes-leader-election-example
spec:
serviceAccountName: kubernetes-leader-election-example
containers:
- name: kubernetes-leader-election-example
image: org/kubernetes-leader-election-example:latest
imagePullPolicy: IfNotPresent
readinessProbe:
httpGet:
port: 8080
path: /actuator/health/readiness
livenessProbe:
httpGet:
port: 8080
path: /actuator/health/liveness
ports:
- containerPort: 8080
```
This will deploy a single application instance to the cluster and that instance will automatically become a leader.

36
spring-cloud-kubernetes-examples/kubernetes-leader-election-example/pom.xml
View File

@@ -59,11 +59,6 @@
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
@@ -94,35 +89,4 @@
</plugins>
</build>
<profiles>
<profile>
<id>kubernetes</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
<configuration>
<enricher>
<config>
<jkube-service>
<type>NodePort</type>
</jkube-service>
</config>
</enricher>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>

99
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/README.md
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@@ -1,99 +0,0 @@
## Kubernetes Spring Cloud LoadBalancer Example
This example demonstrates how to use [Spring Cloud LoadBalancer](https://github.com/spring-cloud-incubator/spring-cloud-loadbalancer). In our example the REST `greeting service` calls the `name service`.
As the Spring Cloud LoadBalancer for Kubernetes is configured within this example, it will fetch from the Kubernetes API Server the list of the endpoints available for the name service and load-balance the request between the IP addresses available.
### Running the example
This project example runs on ALL the Kubernetes or OpenShift environments, but for development purposes you can use [Minikube - Kubernetes](https://minikube.sigs.k8s.io/docs/start/) tool
to install the platform locally within a virtual machine managed by VirtualBox, Xhyve or KVM, with no fuss.
IMPORTANT: In order for this setup to work, you need to grant permissions to retrieve "pods", "services" and "endpoints" to the serviceaccount that will be used with the greeting-service.
### Build/Deploy using Minikube
First, create a new virtual machine provisioned with Kubernetes on your laptop using the command `minikube start`.
You also probably want to configure your Docker client to point the minikube Docker daemon with:
```
eval $(minikube docker-env)
```
Next, you can compile your project and generate the Kubernetes resources (yaml files containing the definition of the pod, deployment, build, service and route to be created)
like also to deploy the application on Kubernetes in one maven line by running:
```
mvn clean install fabric8:deploy -Dfabric8.generator.from=fabric8/java-jboss-openjdk8-jdk -Pkubernetes
```
### Call the Greeting service
When maven has finished to compile the code but also to call the platform in order to deploy the yaml files generated and tell to the platform to start the process
to build/deploy the docker image and create the containers where the Spring Boot application will run 'greeting-service" and "name-service", you will be able to
check if the pods have been created using this command :
```
kc get pods
```
If the status of the Spring Boot pod application is `running` and ready state `1`, then you can
get the external address IP/Hostname to be used to call the service from your laptop
```
minikube service --url greeting-service
```
and then call the service using the curl client
```
curl https://IP_OR_HOSTNAME/greeting
```
to get a response as such
```
Hello from name-service-1-0dzb4!d
```
### Verify the load balancing
First, scale the number of pods of the `name service` to 2
```
kc scale --replicas=2 deployment name-service
```
Wait a few minutes before to issue the curl request to call the Greeting Service to let the platform to create the new pod.
```
kc get pods --selector=project=name-service
NAME READY STATUS RESTARTS AGE
name-service-1652024859-fsnfw 1/1 Running 0 33s
name-service-1652024859-wrzjs 1/1 Running 0 6m
```
If you issue the curl request to access the greeting service, you should see that the message response
contains a different id end of the message which corresponds to the name of the pod.
```
Hello from name-service-1-0ss0r!
```
As Spring Cloud LoadBalancer will question the Kubernetes API to get, base on the `name-service` name, the list of IP Addresses assigned to the service as endpoints,
you should see that you will get a response from one of the 2 pods running
```
kc get endpoints/name-service
NAME ENDPOINTS AGE
name-service 172.17.0.5:8080,172.17.0.6:8080 40m
```
Here is an example about what you will get
```
curl https://IP_OR_HOSTNAME/greeting
Hello from name-service-1652024859-hf3xv!
curl https://IP_OR_HOSTNAME/greeting
Hello from name-service-1652024859-426kv!
...
```

92
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/pom.xml
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@@ -1,92 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>kubernetes-loadbalancer-example</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>3.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>greeting-service</artifactId>
<name>Spring Cloud LoadBalancer :: Greeting Service</name>
<description>Spring Cloud LoadBalancer :: Greeting Service</description>
<build>
<plugins>
<plugin>
<!--skip deploy -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<type>pom</type>
<scope>import</scope>
<version>${spring-boot.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-kubernetes-fabric8-loadbalancer</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-kubernetes-fabric8</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
</dependency>
</dependencies>
</project>

10
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/src/main/fabric8/route.yml
View File

@@ -1,10 +0,0 @@
apiVersion: v1
kind: Route
metadata:
name: greeting-service
spec:
port:
targetPort: 8080
to:
kind: Service
name: greeting-service

57
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/src/main/java/org/springframework/cloud/kubernetes/examples/GreetingController.java
View File

@@ -1,57 +0,0 @@
/*
* Copyright 2020-2020 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.cloud.kubernetes.examples;
import reactor.core.publisher.Mono;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
/**
* Greeting service controller.
*
* @author Gytis Trikleris
* @author Olga Maciaszek-Sharma
*/
@RestController
public class GreetingController {
private final NameService nameService;
public GreetingController(NameService nameService) {
this.nameService = nameService;
}
/**
* Endpoint to get a greeting. This endpoint uses a name server to get a name for the
* greeting.
*
* Request to the name service is guarded with a circuit breaker. Therefore if a name
* service is not available or is too slow to response fallback name is used.
*
* Delay parameter can me used to make name service response slower.
* @param delay Milliseconds for how long the response from name service should be
* delayed.
* @return Greeting string.
*/
@GetMapping("/greeting")
public Mono<String> getGreeting(@RequestParam(value = "delay", defaultValue = "0") int delay) {
return nameService.getName(delay).map(name -> String.format("Hello from %s!", name));
}
}

46
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/src/main/java/org/springframework/cloud/kubernetes/examples/GreetingServiceApplication.java
View File

@@ -1,46 +0,0 @@
/*
* Copyright 2020-2020 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.cloud.kubernetes.examples;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.reactive.function.client.WebClient;
/**
* Entry point to the application.
*
* @author Gytis Trikleris
* @author Olga Maciaszek-Sharma
*/
@SpringBootApplication
@EnableDiscoveryClient
public class GreetingServiceApplication {
public static void main(String[] args) {
SpringApplication.run(GreetingServiceApplication.class, args);
}
@LoadBalanced
@Bean
WebClient.Builder loadBalancedWebClientBuilder() {
return WebClient.builder();
}
}

44
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/src/main/java/org/springframework/cloud/kubernetes/examples/NameService.java
View File

@@ -1,44 +0,0 @@
/*
* Copyright 2020-2020 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.cloud.kubernetes.examples;
import reactor.core.publisher.Mono;
import org.springframework.stereotype.Service;
import org.springframework.web.reactive.function.client.WebClient;
/**
* Service invoking name-service via REST and guarded by Hystrix.
*
* @author Gytis Trikleris
* @author Olga Maciaszek-Sharma
*/
@Service
public class NameService {
private final WebClient webClient;
public NameService(WebClient.Builder webClientBuilder) {
webClient = webClientBuilder.build();
}
public Mono<String> getName(int delay) {
return webClient.get().uri(String.format("http://name-service/name?delay=%d", delay)).retrieve()
.bodyToMono(String.class);
}
}

10
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/greeting-service/src/main/resources/application.yml
View File

@@ -1,10 +0,0 @@
spring:
application:
name: greeting-service
cloud:
loadbalancer:
ribbon:
enabled: false
server:
port: 8080

67
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/name-service/pom.xml
View File

@@ -1,67 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>kubernetes-loadbalancer-example</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>3.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>name-service</artifactId>
<name>Spring Cloud LoadBalancer :: Name Service</name>
<description>Spring Cloud LoadBalancer :: Name Service</description>
<build>
<plugins>
<plugin>
<!--skip deploy -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>

10
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/name-service/src/main/fabric8/route.yml
View File

@@ -1,10 +0,0 @@
apiVersion: v1
kind: Route
metadata:
name: name-service
spec:
port:
targetPort: 8080
to:
kind: Service
name: name-service

68
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/name-service/src/main/java/org/springframework/cloud/kubernetes/examples/NameController.java
View File

@@ -1,68 +0,0 @@
/*
* Copyright 2020-2020 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.cloud.kubernetes.examples;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Mono;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
/**
* Name service controller.
*
* @author Gytis Trikleris
* @author Olga Maciaszek-Sharma
*/
@RestController
public class NameController {
private static final Logger LOG = LoggerFactory.getLogger(NameController.class);
private final String hostName = System.getenv("HOSTNAME");
@GetMapping("/")
public String ribbonPing() {
LOG.info("Ribbon ping");
return hostName;
}
/**
* Endpoint to get a name with a capability to delay a response for some number of
* milliseconds.
* @param delayValue Milliseconds for how long the response should be delayed.
* @return Host name.
*/
@GetMapping("/name")
public Mono<String> getName(@RequestParam(value = "delay", defaultValue = "0") int delayValue) {
LOG.info(String.format("Returning a name '%s' with a delay '%d'", hostName, delayValue));
delay(delayValue);
return Mono.just(hostName);
}
private void delay(int delayValue) {
try {
Thread.sleep(delayValue);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}

34
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/name-service/src/main/java/org/springframework/cloud/kubernetes/examples/NameServiceApplication.java
View File

@@ -1,34 +0,0 @@
/*
* Copyright 2020-2020 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.cloud.kubernetes.examples;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* Entry point to the application.
*
* @author Gytis Trikleris
*/
@SpringBootApplication
public class NameServiceApplication {
public static void main(String[] args) {
SpringApplication.run(NameServiceApplication.class, args);
}
}

6
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/name-service/src/main/resources/application.yml
View File

@@ -1,6 +0,0 @@
spring:
application:
name: name-service
server:
port: 8080

115
spring-cloud-kubernetes-examples/kubernetes-loadbalancer-example/pom.xml
View File

@@ -1,115 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spring-cloud-kubernetes-examples</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>3.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>kubernetes-loadbalancer-example</artifactId>
<name>Spring Cloud LoadBalancer Example</name>
<packaging>pom</packaging>
<profiles>
<profile>
<id>kubernetes</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
<configuration>
<enricher>
<config>
<jkube-service>
<type>NodePort</type>
</jkube-service>
</config>
</enricher>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>release</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>helm</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<executions>
<execution>
<id>run-integration-tests</id>
<phase>integration-test</phase>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<skipTests>false</skipTests>
<skipITs>false</skipITs>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<modules>
<module>name-service</module>
<module>greeting-service</module>
</modules>
</project>

0
spring-cloud-kubernetes-examples/kubernetes-reload-example/.jdk8
View File

103
spring-cloud-kubernetes-examples/kubernetes-reload-example/README.md
View File

@@ -1,103 +0,0 @@
# Setting up the Environment
To play with these examples, you can install locally Kubernetes & Docker using [Minikube](https://minikube.sigs.k8s.io/docs/start/) within a Virtual Machine
managed by a hypervisor (Xhyve, Virtualbox or KVM) if your machine is not a native Unix operating system.
When the Minikube is installed on your machine, you can start kubernetes using this command:
```
minikube start
```
You also probably want to configure your docker client to point the Minikube docker daemon with:
```
eval $(minikube docker-env)
```
This will make sure that the docker images that you build are available to the Minikube environment.
## Kubernetes Reload Example
This example demonstrate how to use the reload feature to change the configuration of a spring-boot application at runtime.
The application consists of a timed bean that periodically prints a message to the console.
The message can be changed using a config map.
### Running the example
Once you have your environment set up, you can deploy the application using the fabric8 maven plugin:
```
mvn clean install fabric8:build fabric8:deploy -Pintegration
```
### Changing the configuration
Create a yaml file with the following contents:
```yml
apiVersion: v1
kind: ConfigMap
metadata:
name: reload-example
data:
application.properties: |-
bean.message=Hello World!
another.property=value
```
A sample config map is provided with this example in the *config-map.yml* file.
To deploy the config map, just run the following command on Kubernetes:
```
kubectl create -f config-map.yml
```
As soon as the config map is deployed, the output of the application changes accordingly.
The config map can be now edited with the following command:
```
kubectl edit configmap reload-example
```
Changes are applied immediately when using the *event* reload mode.
The name of the config map (*"reload-example"*) matches the name of the application as declared in the *application.properties* file.
**Note**: If you are running in a Kubernetes environment where [RBAC](https://kubernetes.io/docs/reference/access-authn-authz/rbac/) is enabled, you need to make sure that your pod has the right level of authorizations to access the K8s APIs or resources.
To help you get started, a sample `ServiceAccount` and `RoleBinding` configuration is provided in `src/k8s` directory. These configuration needs to be applied to your K8s cluster and the newly created `ServiceAccount` needs to be attached to your pod spec like this:
```yml
spec:
containers:
image: <image_loc>
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /actuator/health
port: 8080
scheme: HTTP
initialDelaySeconds: 180
successThreshold: 1
name: spring-boot
ports:
- containerPort: 8080
name: http
protocol: TCP
- containerPort: 9779
name: prometheus
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /actuator/health
port: 8080
scheme: HTTP
initialDelaySeconds: 10
successThreshold: 1
securityContext:
privileged: false
serviceAccountName: <service_account_name>
```

8
spring-cloud-kubernetes-examples/kubernetes-reload-example/config-map.yml
View File

@@ -1,8 +0,0 @@
apiVersion: v1
kind: ConfigMap
metadata:
name: reload-example
data:
application.properties: |-
bean.message=Hello World!
another.property=value

230
spring-cloud-kubernetes-examples/kubernetes-reload-example/pom.xml
View File

@@ -1,230 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--
~ Copyright 2013-2018 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.
~
--><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spring-cloud-kubernetes-examples</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>3.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-cloud-kubernetes-example-reload</artifactId>
<name>Spring Cloud Kubernetes :: Examples :: Reload ConfigMap</name>
<description>Example demonstrating how to use the configuration reload feature.
</description>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<type>pom</type>
<scope>import</scope>
<version>${spring-boot.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<hibernate-validator.version>6.0.19.Final</hibernate-validator.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-kubernetes-fabric8-config</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate-validator.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<!--skip deploy -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>${maven-deploy-plugin.version}</version>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
</goals>
</execution>
</executions>
<configuration>
<enricher>
<config>
<jkube-controller>
<name>spring-cloud-reload</name>
</jkube-controller>
<jkube-service>
<name>spring-cloud-reload</name>
</jkube-service>
</config>
</enricher>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>kubernetes</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
<configuration>
<enricher>
<config>
<jkube-controller>
<name>spring-cloud-reload</name>
</jkube-controller>
<jkube-service>
<name>spring-cloud-reload</name>
<type>NodePort</type>
</jkube-service>
</config>
</enricher>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>release</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>helm</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jkube</groupId>
<artifactId>kubernetes-maven-plugin</artifactId>
<version>${kubernetes.maven.plugin.version}</version>
<executions>
<execution>
<id>fmp</id>
<goals>
<goal>resource</goal>
<goal>helm</goal>
<goal>build</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<executions>
<execution>
<id>run-integration-tests</id>
<phase>integration-test</phase>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<skipTests>false</skipTests>
<skipITs>false</skipITs>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>

13
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/k8s/rb.yml
View File

@@ -1,13 +0,0 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: pod-reader
namespace: default
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: pod-reader
subjects:
- kind: ServiceAccount
name: config-reader
namespace: default

9
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/k8s/role.yml
View File

@@ -1,9 +0,0 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
namespace: default
name: pod-reader
rules:
- apiGroups: [""]
resources: ["pods","configmaps"]
verbs: ["get", "watch", "list"]

5
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/k8s/sa.yml
View File

@@ -1,5 +0,0 @@
apiVersion: v1
kind: ServiceAccount
metadata:
name: config-reader
namespace: default

31
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/java/org/springframework/cloud/kubernetes/examples/App.java
View File

@@ -1,31 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableScheduling
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}

36
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/java/org/springframework/cloud/kubernetes/examples/DummyConfig.java
View File

@@ -1,36 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
@Configuration(proxyBeanMethods = false)
@ConfigurationProperties(prefix = "dummy")
public class DummyConfig {
private String message = "this is a dummy message";
public String getMessage() {
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
}

38
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/java/org/springframework/cloud/kubernetes/examples/MyBean.java
View File

@@ -1,38 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Component
public class MyBean {
@Autowired
private MyConfig myConfig;
@Autowired
private DummyConfig dummyConfig;
@Scheduled(fixedDelay = 5000)
public void hello() {
System.out.println("The first message is: " + this.myConfig.getMessage());
System.out.println("The other message is: " + this.dummyConfig.getMessage());
}
}

36
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/java/org/springframework/cloud/kubernetes/examples/MyConfig.java
View File

@@ -1,36 +0,0 @@
/*
* Copyright 2013-2019 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.cloud.kubernetes.examples;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
@Configuration(proxyBeanMethods = false)
@ConfigurationProperties(prefix = "bean")
public class MyConfig {
private String message = "a message that can be changed live";
public String getMessage() {
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
}

8
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/resources/application.yaml
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@@ -1,8 +0,0 @@
management:
endpoint:
restart:
enabled: true
health:
enabled: true
info:
enabled: true

13
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/resources/bootstrap.yaml
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@@ -1,13 +0,0 @@
spring:
application:
name: reload-example
cloud:
kubernetes:
reload:
enabled: true
mode: polling
period: 5000
config:
sources:
- name: other
- name: ${spring.application.name}

7
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/resources/logback.xml
View File

@@ -1,7 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<logger name="org.hibernate.validator"
level="info"/> <!-- Validator prints a lot of debug messages during integration tests -->
<logger name="org.springframework.cloud.kubernetes" level="debug"/>
</configuration>

10
spring-cloud-kubernetes-examples/kubernetes-reload-example/src/main/resources/old-application.properties
View File

@@ -1,10 +0,0 @@
spring.application.name=reload-example
management.endpoint.health.enabled=true
management.endpoint.info.enabled=true
management.endpoint.restart.enabled=true
spring.cloud.kubernetes.reload.enabled=true
#spring.cloud.kubernetes.reload.strategy=restart_context
#spring.cloud.kubernetes.reload.mode=polling
#spring.cloud.kubernetes.reload.period=5000
#spring.cloud.kubernetes.reload.monitoring-config-maps=false
#spring.cloud.kubernetes.reload.monitoring-secrets=true

3
spring-cloud-kubernetes-examples/pom.xml
View File

@@ -34,10 +34,7 @@
</description>
<modules>
<module>kubernetes-reload-example</module>
<module>kubernetes-hello-world-example</module>
<module>kubernetes-leader-election-example</module>
<module>kubernetes-loadbalancer-example</module>
</modules>
<build>