kubernetes集群搭建（6）：kubernetes基本使用演示

以简单部署访问来演示kubernetes的基本使用

流程：用户访问client应用，client应用中调用server应用，由于部署了多节点，client在访问server时应该配置server 暴露的虚拟IP地址

由于DNS暂未配置成功，在client调用server时配置的是server的cluster ip而不是服务名

server端与client端均为springboot web应用

1.代码示例：

server端代码：打包为server.jar

 @RestController

 public class PermissionController {

     @RequestMapping("/permission/check")

     public Result permissionCheck(@RequestBody PermissionParam permissionParam) {

         System.out.println("接收到验证请求："+JSON.toJSONString(permissionParam));

         if(permissionParam.getRequestURI().equals("/permission/test")){

             return new Result();

         } else {

             return new Result("x00001","无权限进行此操作");

         }

     }

     @RequestMapping("/test")

     public Result test() {

         return new Result("访问成功 "+System.currentTimeMillis());

     }

 }

client端代码:打包为client.jar

 @RestController

 public class PermissionController {

     @Value("${server_url}")

     private String permissionServerUrl;

     @Autowired

     PermissionCheckService permissionService;

     @RequestMapping("/permission/test")

     public Result permissionTest() {

         return new Result("有权限，访问成功。运行参数为："+ permissionServerUrl);

     }

     @RequestMapping("/test")

     public Result test() {

         return new Result("访问成功 "+System.currentTimeMillis());

     }

 }

Controller

 @Service

 public class PermissionCheckService {

     @Value("${server_url}")

     private String permissionServerUrl;

     @Autowired

     private RestTemplate restTemplate;

     public Result permissionCheck(Long userId, Integer appId, String uri) throws RestClientException, URISyntaxException {

         ResponseEntity<Result> result = restTemplate.postForEntity(new URI(permissionServerUrl + "/permission/check"),

                 new PermissionParam(userId, appId, uri), Result.class);

         return result.getBody();

     }

 }

service

client端拦截器：用于在接收到请求时，调用server端接口验证是否有权限访问

 package com.phicomm.permission.client.config;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.springframework.beans.factory.annotation.Autowired;

 import org.springframework.context.annotation.Bean;

 import org.springframework.context.annotation.Configuration;

 import org.springframework.web.servlet.HandlerInterceptor;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

 import com.alibaba.fastjson.JSON;

 import com.phicomm.permission.client.service.PermissionCheckService;

 import com.phicomm.permission.lib.Result;

 @Configuration

 public class InterceptorConfig extends WebMvcConfigurerAdapter {

     @Bean

     public PermissionCheckInterceptor getPermissionCheckInterceptor() {

         return new PermissionCheckInterceptor();

     }

     @Override

     public void addInterceptors(InterceptorRegistry registry) {

         registry.addInterceptor(getPermissionCheckInterceptor()).addPathPatterns("/**").excludePathPatterns("/test");

         super.addInterceptors(registry);

     }

     class PermissionCheckInterceptor implements HandlerInterceptor {

         @Autowired

         PermissionCheckService permissionCheckService;

         @Override

         public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)

                 throws Exception {

         }

         @Override

         public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)

                 throws Exception {

         }

         @Override

         public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj) throws Exception {

             String uri = request.getRequestURI();

             Integer appId = 1;

             System.out.println("开始权限验证："+ uri);

             Result result = permissionCheckService.permissionCheck(1L, appId, uri);

             if (result.getStatus().equals(Result.Status.SUCCESS.code())) {

                 return true;

             } else {

                 response.setContentType("application/json;charset=utf-8");

                 response.getWriter().write(JSON.toJSONString(result));

                 return false;

             }

         }

     }

 }

PermissionCheckInterceptor

2.docker镜像制作：

　　a.上传server.jar 和 client.jar 及jdk到docker私服待用（jdk已解压并重命名目录，目的是为了让镜像中的jdk路径清晰易记）

 [root@localhost ~]# ls -l

 总用量 231344

 -rw-------. 1 root root      1231 4月   9 21:24 anaconda-ks.cfg

 -rw-r--r--. 1 root root   9420658 4月  17 15:29 apache-tomcat-8.0.51.tar.gz

 -rw-r--r--. 1 root root  22102842 4月  20 15:08 client.jar

 -rw-r--r--. 1 root root       474 4月  19 09:04 Dockerfile_bak

 -rw-r--r--. 1 root root       382 4月  20 14:29 DockerfileClient

 -rw-r--r--. 1 root root       386 4月  23 11:19 DockerfileServer

 drwxr-xr-x. 8   10  143       255 12月 13 2016 jdk

 -rw-r--r--. 1 root root 183246769 4月  17 15:26 jdk-8u121-linux-x64.tar.gz

 -rw-r--r--. 1 root root  22102433 4月  20 13:23 server.jar

 drwxr-xr-x. 9 root root       160 4月  17 15:29 tomcat

 [root@localhost ~]#

镜像所需文件

　　b.编写镜像制作用Dockerfile

 [root@localhost ~]# vi DockerfileServer 

 FROM centos

 MAINTAINER changw.xiao@qq.com

 COPY ./jdk /usr/local/jdk

 COPY ./server.jar /root/server.jar

 ENV JAVA_HOME /usr/local/jdk

 ENV JRE_HOME $JAVA_HOME/jre

 ENV CLASSPATH .:$JAVA_HOME/lib:$JRE_HOME/lib

 ENV PATH $PATH:$JAVA_HOME/bin

 ENV CATALINA_OPTS -Xms128m -Xmx1024m -XX:PermSize=64M -XX:MaxPermSize=512M

 ENTRYPOINT ["java", "-jar",  "/root/server.jar", "--server.port=9999"]

DockerfileServer

 [root@localhost ~]# vi DockerfileClient 

 FROM centos

 MAINTAINER changw.xiao@qq.com

 COPY ./jdk /usr/local/jdk

 COPY ./client.jar /root/client.jar

 ENV JAVA_HOME /usr/local/jdk

 ENV JRE_HOME $JAVA_HOME/jre

 ENV CLASSPATH .:$JAVA_HOME/lib:$JRE_HOME/lib

 ENV PATH $PATH:$JAVA_HOME/bin

 ENV CATALINA_OPTS -Xms128m -Xmx1024m -XX:PermSize=64M -XX:MaxPermSize=512M

 ENTRYPOINT ["java","-jar","/root/client.jar","--server.port=9998"]

DockerfileClient

　　c.制作镜像并push到docker私库上

 [root@localhost ~]# docker build -f DockerfileServer  -t server:v2 --rm=true .

 Sending build context to Docker daemon 622.6 MB

 Step 1/10 : FROM centos

  ---> e934aafc2206

 Step 2/10 : MAINTAINER changw.xiao@qq.com

  ---> Using cache

  ---> 72ab25d99688

 Step 3/10 : COPY ./jdk /usr/local/jdk

  ---> Using cache

  ---> 527d6efcf1eb

 Step 4/10 : COPY ./server.jar /root/server.jar

  ---> Using cache

  ---> 7d6ad5d000af

 Step 5/10 : ENV JAVA_HOME /usr/local/jdk

  ---> Using cache

  ---> 99a7bfe20a2c

 Step 6/10 : ENV JRE_HOME $JAVA_HOME/jre

  ---> Using cache

  ---> 65fa863798ba

 Step 7/10 : ENV CLASSPATH .:$JAVA_HOME/lib:$JRE_HOME/lib

  ---> Using cache

  ---> 4884da8b0a46

 Step 8/10 : ENV PATH $PATH:$JAVA_HOME/bin

  ---> Using cache

  ---> 342ae4b430ce

 Step 9/10 : ENV CATALINA_OPTS -Xms128m -Xmx1024m -XX:PermSize=64M -XX:MaxPermSize=512M

  ---> Using cache

  ---> 9f4f69bba1a8

 Step 10/10 : ENTRYPOINT java -jar /root/server.jar --server.port=9999

  ---> Using cache

  ---> adba02d66112

 Successfully built adba02d66112

 [root@localhost ~]# docker tag server:v2 127.0.0.1:5000/server:v2

 [root@localhost ~]# docker push 127.0.0.1:5000/server:v2

 The push refers to a repository [127.0.0.1:5000/server]

 d791b1f51432: Layer already exists

 3d8fe6c21563: Layer already exists

 43e653f84b79: Layer already exists

 v2: digest: sha256:0cdc81e870c533efb7d60be2452fdfce2f0b0186d0568537e9a67d205262e7c6 size: 954

 [root@localhost ~]# docker images |grep server

 127.0.0.1:5000/server                                                    v1                  adba02d66112        2 days ago          591 MB

 127.0.0.1:5000/server                                                    v2                  adba02d66112        2 days ago          591 MB

 server                                                                   v1                  adba02d66112        2 days ago          591 MB

 server                                                                   v2                  adba02d66112        2 days ago          591 MB

 [root@localhost ~]#

server端镜像server:v2制作

 [root@localhost ~]# docker build -f DockerfileClient  -t client:v2 --rm=true .

 Sending build context to Docker daemon 622.6 MB

 Step 1/10 : FROM centos

  ---> e934aafc2206

 Step 2/10 : MAINTAINER changw.xiao@qq.com

  ---> Using cache

  ---> 72ab25d99688

 Step 3/10 : COPY ./jdk /usr/local/jdk

  ---> Using cache

  ---> 527d6efcf1eb

 Step 4/10 : COPY ./client.jar /root/client.jar

  ---> Using cache

  ---> 397a279f72b9

 Step 5/10 : ENV JAVA_HOME /usr/local/jdk

  ---> Using cache

  ---> e553d3e47099

 Step 6/10 : ENV JRE_HOME $JAVA_HOME/jre

  ---> Using cache

  ---> 019ed6b62619

 Step 7/10 : ENV CLASSPATH .:$JAVA_HOME/lib:$JRE_HOME/lib

  ---> Using cache

  ---> 9fa826201e2b

 Step 8/10 : ENV PATH $PATH:$JAVA_HOME/bin

  ---> Using cache

  ---> 5922592036e7

 Step 9/10 : ENV CATALINA_OPTS -Xms128m -Xmx1024m -XX:PermSize=64M -XX:MaxPermSize=512M

  ---> Using cache

  ---> c563bf822200

 Step 10/10 : ENTRYPOINT java -jar /root/client.jar --server.port=9998

  ---> Using cache

  ---> 6b9a0358f207

 Successfully built 6b9a0358f207

 [root@localhost ~]# docker tag client:v2 127.0.0.1:5000/client:v2

 [root@localhost ~]# docker push 127.0.0.1:5000/client:v2

 The push refers to a repository [127.0.0.1:5000/client]

 8e2aa24bef0a: Layer already exists

 3d8fe6c21563: Layer already exists

 43e653f84b79: Layer already exists

 v2: digest: sha256:a3d77ff85edb5272eb22d57b6bfd5ae6052b5903eaf7b09b256de2304207b905 size: 954

 [root@localhost ~]# docker images |grep client

 127.0.0.1:5000/client                                                    v1                  6b9a0358f207        2 days ago          591 MB

 127.0.0.1:5000/client                                                    v2                  6b9a0358f207        2 days ago          591 MB

 client                                                                   v1                  6b9a0358f207        2 days ago          591 MB

 client                                                                   v2                  6b9a0358f207        2 days ago          591 MB

 [root@localhost ~]#

client端镜像client:v2制作

3.server端rc配置与部署

　　3.1.创建server-rc.yaml配置文件

 [root@k8s-master ~]# vi server-rc.yaml 

 apiVersion: v1

 kind: ReplicationController   #指名类型为rc

 metadata:

   name: serverrc #rc 名字，创建后的pod名字为  serverrc-随机字符

 spec:

   replicas: 2　　#指定副本数量，会一直维持这个数量的副本，如果某节点挂掉，又会立即构建新的来替代　　

   template:

     metadata:

       labels:

         app: server　　#app名字，相同的名字代表是同一个应用，service会按这个名字来做负载

     spec:

       containers:

       - name: server　　

         image: 192.168.100.6:5000/server:v1 #镜像源

         ports:

         - containerPort: 9999　　#容器端口

　　3.2.启动server-rc

kubectl create -f /root/server-rc.yaml

　　3.3.确认启动是否成功

[root@k8s-master ~]# kubectl get pods --all-namespaces | grep serverrc

default       serverrc-3qprz              1/1       Running            0          3h

default       serverrc-8s274              1/1       Running            0          3h

　　注意：kubectl get pods默认只显示namespace为default下的，要显示全部需加上 --all-namespances

　　3.4.查看详情或错误信息

[root@k8s-master ~]# kubectl describe pod serverrc-3qprz

Name:        serverrc-3qprz

Namespace:    default

Node:        k8s-node1/192.168.100.5  #在哪个节点上部署的

Start Time:    Mon, 23 Apr 2018 08:53:06 +0800

Labels:        app=server

Status:        Running

IP:        172.16.49.2 #容器内对应的ip信息（之前master上   etcdctl mk /atomic.io/network/config '{"Network":"172.16.0.0/16"}'  配置的ip范围内）

Controllers:    ReplicationController/serverrc

Containers:

  server:

    Container ID:        docker://00a7c4c588f2d7593bf0bbe6fd07350903f96e00f6e75278283e054580731a4f

    Image:            192.168.100.6:5000/server:v1 #使用的镜像

    Image ID:            docker-pullable://192.168.100.6:5000/server@sha256:0cdc81e870c533efb7d60be2452fdfce2f0b0186d0568537e9a67d205262e7c6

    Port:            9999/TCP #端口信息

    State:            Running

      Started:            Mon, 23 Apr 2018 08:53:06 +0800

    Ready:            True

    Restart Count:        0

    Volume Mounts:        <none>

    Environment Variables:    <none>

Conditions:

  Type        Status

  Initialized     True

  Ready     True

  PodScheduled     True

No volumes.

QoS Class:    BestEffort

Tolerations:    <none>

No events.#如果没启动成功，这里会有错误信息，根据错误信息不断修改配置最终才会成功

[root@k8s-master ~]#

　　3.5.测试应用是否部署成功

[root@k8s-master ~]# curl 172.16.49.2:9999/test

{"content":"访问成功 1524458561072","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]#

[root@k8s-master ~]#

4.server端service配置与部署

　　4.1. 由于server端部署的节点可以为多个（本示例仅2个），怎么给client调用方提供唯一的请求地址呢？

　　　　传统部署方式一般会在前段做一个负载均衡，提供唯一的地址供调用方使用

　　　　但由于kubernets部署环境下，node会因各种情况重建，ip信息也会变化，传统方式已经不再满足需要

　　　　可喜的是kubernets提供了service，service就是将同一名字的app信息收集后在前端提供了cluster_ip（重建会变化）和服务名（重建不会变化），

　　　　功能和负载均衡一样，但node的销毁、重建不需要用户关心，调用方也只需要知道服务名即可，无需知道node节点任何信息

　　4.2. 创建server-svc.yaml文件

[root@k8s-master ~]# vi server-svc.yaml 

apiVersion: v1

kind: Service  #指定种类为service

metadata:

  name: serversvc  #service 名字 提供给调用方使用，调用方无需知道ip  由dns解析服务名为cluster ip

  labels:

    app: server  #rc的名字，service将同一名字的rc作为后端node进行负载

spec:

  ports:

  - port: 9001　　　　　　#service暴露在cluster ip上的端口，clusterIP:port 是提供给集群内部客户访问service的入口

    targetPort: 9999　　 #pod上的端口，从port和nodePort上到来的数据最终经过kube-proxy流入到后端pod的targetPort上进入容器，和rc中的containerPort一致
    nodePort: 30001　　 #提供给集群外部客户访问service的入口
    protocol: TCP
　　selector: 
　　  app: server
   type: NodePort

　　4.3.创建service 并确认创建成功

kubectl create -f server-svc.yaml

[root@k8s-master ~]# kubectl get svc --all-namespaces

NAMESPACE     NAME         CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE

default       kubernetes   10.254.0.1      <none>        443/TCP          4h

default       serversvc    10.254.77.154   <nodes>       9001:30001/TCP   4h

kube-system   kube-dns     10.254.0.2      <none>        53/UDP,53/TCP    2d

[root@k8s-master ~]#

　　4.4.查看svc详情

[root@k8s-master ~]# kubectl describe svc serversvc

Name:            serversvc  #服务名，调用方就根据服务名来调用，因为随着svc重建，cluster_ip也会变更的

Namespace:        default

Labels:            app=server

Selector:        app=server

Type:            NodePort

IP:            10.254.77.154  #这个即为cluster_ip，相当于nginx做负载均衡时 nginx的ip地址

Port:            <unset>    9001/TCP

NodePort:        <unset>    30001/TCP

Endpoints:        172.16.20.2:9999,172.16.49.2:9999 #这个为service负载的节点ip和端口

Session Affinity:    None

No events.   #如果有错，这里会有很多行日志

[root@k8s-master ~]#

　　4.5.测试访问

[root@k8s-master ~]# curl 172.16.49.2:9999/test  #直接通过nodeIP：port 访问成功

{"content":"访问成功 1524460721254","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]#

[root@k8s-master ~]# curl 172.16.20.2:9999/test #访问另一节点也成功

{"content":"访问成功 1524460728456","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]#

[root@k8s-master ~]# curl 10.254.77.154:9001/test  #直接访问cluster_ip 没成功？  其实这里必须要到容器内部才能访问

curl: (7) Failed connect to 10.254.77.154:9001; 拒绝连接

[root@k8s-master ~]#

[root@k8s-master ~]# kubectl exec -it clientrc-8qk3z /bin/bash

[root@clientrc-8qk3z /]# curl 10.254.77.154:9001/test    #进入容器内部访问cluster_ip 成功

{"content":"访问成功 1524460861212","status":"OK","errorCode":null,"errorMsg":null}
[root@clientrc-8qk3z /]#

[root@clientrc-8qk3z /]# exit

exit

[root@k8s-master ~]#

5.client端rc创建并调用server端接口

　　5.1.client-rc.yaml

 apiVersion: v1

 kind: ReplicationController

 metadata:

   name: clientrc

 spec:

   replicas: 2  #节点数量

   template:

     metadata:

       labels:

         app: client

     spec:

       containers:

       - name: client

         image: 192.168.100.6:5000/client:v1

         ports:

         - containerPort: 9998   #容器端口

         env:　　　　　　　　　　　　#增加了环境变量，用来配置server端地址　　　　　　

         - name: server_url　　　 #变量名

           value: 'http://10.254.77.154:9001/'  #变量值，由于我的dns没配置好，所以这里使用了server端的service cluster_ip，如果配置好了dns 这里应该为  value: 'http://serversvc:9001/'

　　5.2.创建client rc

kubectl create -f client-rc.yaml

　　5.3.确认启动状态

[root@k8s-master ~]# kubectl get pods --all-namespaces |grep client

default       clientrc-8qk3z              1/1       Running            0          4h

default       clientrc-hqs06              1/1       Running            0          4h

[root@k8s-master ~]#

[root@k8s-master ~]# kubectl get pods -l app=client -o json | grep podIP

                "podIP": "172.16.60.3",

                "podIP": "172.16.20.3",

[root@k8s-master ~]#

　　5.4.client两个节点访问

[root@k8s-master ~]# curl 172.16.60.3:9998/test

{"content":"访问成功 1524461788548","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]#

[root@k8s-master ~]# curl 172.16.20.3:9998/test

{"content":"访问成功 1524461800005","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]#

　　5.5.client端调用server端服务

　　在client端发送需要被拦截器拦截的请求，从而达到调用server端接口的目的

[root@k8s-master ~]# curl 172.16.60.3:9998/permission/test

{"content":"有权限，访问成功。运行参数为：http://10.254.77.154:9001/","status":"OK","errorCode":null,"errorMsg":null}
[root@k8s-master ~]# curl 172.16.60.3:9998/permission/test2

{"errorCode":"x00001","errorMsg":"无权限进行此操作","status":"ERROR"}[root@k8s-master ~]#

　　通过logs来查看各容器的输出log

kubectl logs serverrc-8s274

　　server端的日志为：

 [root@k8s-master ~]# kubectl logs serverrc-8s274

   .   ____          _            __ _ _

  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \

 ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )

   '  |____| .__|_| |_|_| |_\__, | / / / /

  =========|_|==============|___/=/_/_/_/

  :: Spring Boot ::        (v2.0.1.RELEASE)

 2018-04-23 00:53:11.716  INFO 1 --- [           main] c.p.p.s.PermissionServerApplication      : Starting PermissionServerApplication v0.0.1-SNAPSHOT on serverrc-8s274 with PID 1 (/root/server.jar started by root in /)

 2018-04-23 00:53:11.737  INFO 1 --- [           main] c.p.p.s.PermissionServerApplication      : No active profile set, falling back to default profiles: default

 2018-04-23 00:53:11.993  INFO 1 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@574caa3f: startup date [Mon Apr 23 00:53:11 UTC 2018]; root of context hierarchy

 2018-04-23 00:53:16.425  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 9999 (http)

 2018-04-23 00:53:16.500  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

 2018-04-23 00:53:16.501  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.29

 2018-04-23 00:53:16.569  INFO 1 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]

 2018-04-23 00:53:16.864  INFO 1 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

 2018-04-23 00:53:16.864  INFO 1 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4932 ms

 2018-04-23 00:53:17.107  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet statViewServlet mapped to [/druid/*]

 2018-04-23 00:53:17.111  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]

 2018-04-23 00:53:17.114  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]

 2018-04-23 00:53:17.114  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

 2018-04-23 00:53:17.114  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]

 2018-04-23 00:53:17.114  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]

 2018-04-23 00:53:17.114  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'webStatFilter' to urls: [/*]

 2018-04-23 00:53:17.873  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:53:18.366  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@574caa3f: startup date [Mon Apr 23 00:53:11 UTC 2018]; root of context hierarchy

 2018-04-23 00:53:18.542  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/permission/check]}" onto public com.phicomm.permission.lib.Result com.phicomm.permission.server.controller.PermissionController.permissionCheck(com.phicomm.permission.lib.PermissionParam)

 2018-04-23 00:53:18.543  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public com.phicomm.permission.lib.Result com.phicomm.permission.server.controller.PermissionController.test()

 2018-04-23 00:53:18.556  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

 2018-04-23 00:53:18.557  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)

 2018-04-23 00:53:18.610  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:53:18.610  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:53:19.002  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup

 2018-04-23 00:53:19.003  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'druidDataSource' has been autodetected for JMX exposure

 2018-04-23 00:53:19.018  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean 'druidDataSource': registering with JMX server as MBean [com.alibaba.druid.pool:name=druidDataSource,type=DruidDataSource]

 2018-04-23 00:53:19.357  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 9999 (http) with context path ''

 2018-04-23 00:53:19.373  INFO 1 --- [           main] c.p.p.s.PermissionServerApplication      : Started PermissionServerApplication in 8.942 seconds (JVM running for 12.022)

 2018-04-23 00:55:59.133  INFO 1 --- [nio-9999-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'

 2018-04-23 00:55:59.135  INFO 1 --- [nio-9999-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started

 2018-04-23 00:55:59.157  INFO 1 --- [nio-9999-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 22 ms

 ????????{"appId":1,"requestURI":"/permission/test","userId":1}

 ????????{"appId":1,"requestURI":"/permission/test2","userId":1}

 [root@k8s-master ~]#

server端其中一个node日志

 [root@k8s-master ~]# kubectl logs clientrc-8qk3z

   .   ____          _            __ _ _

  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \

 ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )

   '  |____| .__|_| |_|_| |_\__, | / / / /

  =========|_|==============|___/=/_/_/_/

  :: Spring Boot ::        (v2.0.1.RELEASE)

 2018-04-23 00:57:36.442  INFO 1 --- [           main] c.p.p.c.PermissionClientApplication      : Starting PermissionClientApplication v0.0.1-SNAPSHOT on clientrc-8qk3z with PID 1 (/root/client.jar started by root in /)

 2018-04-23 00:57:36.493  INFO 1 --- [           main] c.p.p.c.PermissionClientApplication      : No active profile set, falling back to default profiles: default

 2018-04-23 00:57:37.023  INFO 1 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@6d1e7682: startup date [Mon Apr 23 00:57:36 UTC 2018]; root of context hierarchy

 2018-04-23 00:57:41.401  WARN 1 --- [           main] o.m.s.mapper.ClassPathMapperScanner      : No MyBatis mapper was found in '[com.phicomm.permission.client]' package. Please check your configuration.

 2018-04-23 00:57:44.780  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 9998 (http)

 2018-04-23 00:57:44.850  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

 2018-04-23 00:57:44.851  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.29

 2018-04-23 00:57:44.863  INFO 1 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]

 2018-04-23 00:57:45.035  INFO 1 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

 2018-04-23 00:57:45.042  INFO 1 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 8176 ms

 2018-04-23 00:57:45.312  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]

 2018-04-23 00:57:45.316  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]

 2018-04-23 00:57:45.316  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

 2018-04-23 00:57:45.316  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]

 2018-04-23 00:57:45.316  INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]

 2018-04-23 00:57:45.872  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:57:46.873  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@6d1e7682: startup date [Mon Apr 23 00:57:36 UTC 2018]; root of context hierarchy

 2018-04-23 00:57:47.121  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/permission/test]}" onto public com.phicomm.permission.lib.Result com.phicomm.permission.client.controller.PermissionController.permissionTest()

 2018-04-23 00:57:47.124  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public com.phicomm.permission.lib.Result com.phicomm.permission.client.controller.PermissionController.test()

 2018-04-23 00:57:47.128  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

 2018-04-23 00:57:47.128  INFO 1 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)

 2018-04-23 00:57:47.186  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:57:47.186  INFO 1 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

 2018-04-23 00:57:48.796  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup

 2018-04-23 00:57:48.799  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'dataSource' has been autodetected for JMX exposure

 2018-04-23 00:57:48.870  INFO 1 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean 'dataSource': registering with JMX server as MBean [com.alibaba.druid.pool:name=dataSource,type=DruidDataSource]

 2018-04-23 00:57:49.367  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 9998 (http) with context path ''

 2018-04-23 00:57:49.378  INFO 1 --- [           main] c.p.p.c.PermissionClientApplication      : Started PermissionClientApplication in 16.264 seconds (JVM running for 22.435)

 2018-04-23 01:00:25.246  INFO 1 --- [nio-9998-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'

 2018-04-23 01:00:25.246  INFO 1 --- [nio-9998-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started

 2018-04-23 01:00:25.283  INFO 1 --- [nio-9998-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 37 ms

 ???????/permission/test

 ???????/permission/test2

cient端某一个node日志

至此，在kubernetes中应用间相互调用基本演示完毕（dns配置服务发现暂未成功）

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