spring-cloud-kubernetes官方demo运行实战 (2)

进入目录spring-cloud-kubernetes-1.0.1.RELEASE/spring-cloud-kubernetes-examples/kubernetes-hello-world-example,这里面就是官方的入门demo，执行以下命令开始构建并且会部署到minikube：

mvn clean package fabric8:deploy -Pkubernetes

构建和部署完成后，控制台输出以下信息：

... [INFO] Installing /usr/local/work/demo/spring-cloud-kubernetes-1.0.1.RELEASE/spring-cloud-kubernetes-examples/kubernetes-hello-world-example/target/kubernetes-hello-world-1.0.1.RELEASE-sources.jar to /root/.m2/repository/org/springframework/cloud/kubernetes-hello-world/1.0.1.RELEASE/kubernetes-hello-world-1.0.1.RELEASE-sources.jar [INFO] [INFO] <<< fabric8-maven-plugin:3.5.37:deploy (default-cli) < install @ kubernetes-hello-world <<< [INFO] [INFO] [INFO] --- fabric8-maven-plugin:3.5.37:deploy (default-cli) @ kubernetes-hello-world --- [INFO] F8: Using Kubernetes at https://192.168.121.133:8443/ in namespace default with manifest /usr/local/work/demo/spring-cloud-kubernetes-1.0.1.RELEASE/spring-cloud-kubernetes-examples/kubernetes-hello-world-example/target/classes/META-INF/fabric8/kubernetes.yml [INFO] Using namespace: default [INFO] Creating a Service from kubernetes.yml namespace default name kubernetes-hello-world [INFO] Created Service: spring-cloud-kubernetes-examples/kubernetes-hello-world-example/target/fabric8/applyJson/default/service-kubernetes-hello-world.json [INFO] Using namespace: default [INFO] Creating a Deployment from kubernetes.yml namespace default name kubernetes-hello-world [INFO] Created Deployment: spring-cloud-kubernetes-examples/kubernetes-hello-world-example/target/fabric8/applyJson/default/deployment-kubernetes-hello-world.json [INFO] F8: HINT: Use the command `kubectl get pods -w` to watch your pods start up [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 16.047 s [INFO] Finished at: 2019-06-08T19:50:50+08:00 [INFO] ------------------------------------------------------------------------

查看服务，已经创建了，类型是NodePort ,并且将8080端口映射到宿主机的30700端口，说明可以用宿主机IP:30700来访问此服务：

[root@minikube kubernetes-hello-world-example]# kubectl get services NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 10h kubernetes-hello-world NodePort 10.108.214.207 <none> 8080:30700/TCP 4m

查看部署，发现始终未能进入READY状态：

[root@minikube kubernetes-hello-world-example]# kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE kubernetes-hello-world 0/1 1 0 4m46s

查看pod，发现新建的pod始终未能进入READY状态：

[root@minikube kubernetes-hello-world-example]# kubectl get pods NAME READY STATUS RESTARTS AGE kubernetes-hello-world-7578f45c5d-hr4r7 0/1 Running 1 6m

从上面的信息可以看出，部署虽然已经完成，但是pod是不可用的，访问网页试试，如下图，果然无法访问：

检查问题

执行命令kubectl describe pod kubernetes-hello-world-7578f45c5d-hr4r7检查pod的具体情况，如下图红框所示，两个探针检查都失败了：

再看看控制台输出的pod基本情况，里面有探针的信息，如下图所示，两个探针的地址都是/health：

打开demo的源码，如下所示，根本就没有路径为/health的服务：

@RestController public class HelloController { private static final Log log = LogFactory.getLog(HelloController.class); @Autowired private DiscoveryClient discoveryClient; @RequestMapping("http://www.likecs.com/") public String hello() { return "Hello World"; } @RequestMapping("/services") public List<String> services() { return this.discoveryClient.getServices(); } }

现在真相大白了：部署到minikube上的pod，配置了探针地址是/health，但是服务中并没有此路径，因此探针检查一直无法通过；

解决问题