spring-cloud-k8s fegin

作者: 与诗小睡 | 来源:发表于2020-07-25 16:35 被阅读0次

服务提供者: pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-parent</artifactId>
       <version>2.3.2.RELEASE</version>
       <relativePath/> <!-- lookup parent from repository -->
   </parent>
   <groupId>com.example.demo</groupId>
   <artifactId>provider</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>provider</name>
   <description>Demo project for Spring Boot</description>

   <properties>
       <java.version>1.8</java.version>
   </properties>

   <dependencies>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-devtools</artifactId>
           <scope>runtime</scope>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-test</artifactId>
           <scope>test</scope>
           <exclusions>
               <exclusion>
                   <groupId>org.junit.vintage</groupId>
                   <artifactId>junit-vintage-engine</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
   </dependencies>

   <build>
       <plugins>
           <plugin>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-maven-plugin</artifactId>
           </plugin>

           <plugin>
               <groupId>io.fabric8</groupId>
               <artifactId>fabric8-maven-plugin</artifactId>
               <version>4.0.0</version>
               <executions>
                   <execution>
                       <goals>
                           <goal>resource</goal>
                           <goal>build</goal>
                       </goals>
                   </execution>
               </executions>
           </plugin>

       </plugins>
   </build>

</project>

提供者启动类:

package com.example.demo.provider;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ProviderApplication {

    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }

}

提供者控制器:

  package com.example.demo.provider;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping
public class DemoController {

    @GetMapping("hello")
    public String hello() {
        return "hello k8s";
    }


}

消费方接口:

package com.example.demo.consuner;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(name = "http://provider:8080")
public interface DemoInterface {

    @RequestMapping("/hello")
    String services();
}

消费方控制器

package com.example.demo.consuner;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping
public class DemoController {

    @Autowired
    private DiscoveryClient dc;

    @Autowired
    private DemoInterface di;

    @GetMapping("services")
    public String getServices() {

        return dc.getServices().toString();
    }
    @GetMapping("api")
    public String getApi() {

        return di.services();
    }
}

消费方启动类:

package com.example.demo.consuner;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ConsunerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConsunerApplication.class, args);
    }

}

消费方法pom,xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.3.BUILD-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example.demo</groupId>
    <artifactId>consuner</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>consuner</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>


    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-kubernetes -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes</artifactId>
            <version>1.1.4.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-kubernetes-ribbon -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes-ribbon</artifactId>
            <version>1.1.4.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-commons</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>

        <dependency>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            <groupId>org.springframework.cloud</groupId>
            <version>2.2.3.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>



        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>


    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.BUILD-SNAPSHOT</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>



    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludeDevtools>false</excludeDevtools>
                </configuration>
            </plugin>
            <plugin>
                <groupId>io.fabric8</groupId>
                <artifactId>fabric8-maven-plugin</artifactId>
                <version>4.0.0</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>resource</goal>
                            <goal>build</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>


    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

一键部署k8s应用采用fabric8-maven-plugin插件
提示:
由于k8s的RBAC权限的控制关系,要想实现请求成功,还需要配置角色绑定,此处为图方便,绑定在default命名空间中的default sa上

默认的sa:

 kubectl  get sa -o yaml
apiVersion: v1
items:
- apiVersion: v1
  kind: ServiceAccount
  metadata:
    creationTimestamp: "2020-06-26T09:20:24Z"
    name: default
    namespace: default
    resourceVersion: "401"
    selfLink: /api/v1/namespaces/default/serviceaccounts/default
    uid: 430be5ca-d724-4e75-82c3-b6039984d3eb
  secrets:
  - name: default-token-hxg7p
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""
[root@master ~]#

role:

[root@slave ~]# kubectl  get Role -o yaml
apiVersion: v1
items:
- apiVersion: rbac.authorization.k8s.io/v1
  kind: Role
  metadata:
    annotations:
      kubectl.kubernetes.io/last-applied-configuration: |
        {"apiVersion":"rbac.authorization.k8s.io/v1","kind":"Role","metadata":{"annotations":{},"creationTimestamp":null,"name":"defaultRole","namespace":"default"},"rules":[{"apiGroups":[""],"resources":["services"],"verbs":["get","list","watch"]}]}
    creationTimestamp: "2020-07-25T06:59:21Z"
    name: defaultRole
    namespace: default
    resourceVersion: "219646"
    selfLink: /apis/rbac.authorization.k8s.io/v1/namespaces/default/roles/defaultRole
    uid: d23a5d72-f61a-4434-9f60-d111dfc03b5a
  rules:
  - apiGroups:
    - ""
    resources:
    - services
    - pods
    - endpoints
    verbs:
    - get
    - list
    - watch
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""
[root@slave ~]#

rolebinding:

[root@slave ~]# kubectl  get rolebinding  -o yaml
apiVersion: v1
items:
- apiVersion: rbac.authorization.k8s.io/v1
  kind: RoleBinding
  metadata:
    annotations:
      kubectl.kubernetes.io/last-applied-configuration: |
        {"apiVersion":"rbac.authorization.k8s.io/v1","kind":"RoleBinding","metadata":{"annotations":{},"creationTimestamp":null,"name":"defaultRoleBinding","namespace":"default"},"roleRef":{"apiGroup":"rbac.authorization.k8s.io","kind":"Role","name":"defaultRole"},"subjects":[{"kind":"ServiceAccount","name":"default","namespace":"default"}]}
    creationTimestamp: "2020-07-25T06:57:25Z"
    name: defaultRoleBinding
    namespace: default
    resourceVersion: "212552"
    selfLink: /apis/rbac.authorization.k8s.io/v1/namespaces/default/rolebindings/defaultRoleBinding
    uid: 26d3af0c-e780-41ed-9c15-4b7acc33fca6
  roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: Role
    name: defaultRole
  subjects:
  - kind: ServiceAccount
    name: default
    namespace: default
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""
[root@slave ~]#

spring-cloud-k8s fegin

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