• 微服务之springCloud和docker-provide(二)


    简介

    通过上一节我们已经通过docker-compose在swarm中部署了有三个实例的高可用eureka服务注册中心,本节我们讨论一下,怎么在创建一个spring cloud生产者,并用docker部署,注册到上一节的eureka集群中。

    一、创建服务提供者模块(microservice-provider-user)

    代码结构如下:

    二、pom.xml文件

    <?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>microservice-consumer-movie</artifactId>
            <groupId>com.jacky</groupId>
            <version>1.0-SNAPSHOT</version>
            <relativePath>../microservice-consumer-movie/pom.xml</relativePath>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>microservice-provider-user</artifactId>
        <packaging>jar</packaging>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
            <!--spring boot使用jpa需要引入的包-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>com.h2database</groupId>
                <artifactId>h2</artifactId>
                <scope>runtime</scope>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-eureka</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-zipkin</artifactId>
            </dependency>-->
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>com.spotify</groupId>
                    <artifactId>docker-maven-plugin</artifactId>
                    <executions>
                        <!--设置在执行maven 的install时构建镜像-->
                        <execution>
                            <id>build-image</id>
                            <phase>install</phase>
                            <goals>
                                <goal>build</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <!--安装了docker的主机,并且打开了api remote接口设置-->
                        <dockerHost>http://192.168.6.130:5678</dockerHost>
                        <pushImage>true</pushImage><!--设置上传镜像到私有仓库,需要docker设置指定私有仓库地址-->
                        <!--镜像名称-->
                        <imageName>${docker.repostory}/${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
                        <!--镜像的基础版本-->
                        <baseImage>java:openjdk-8-jdk-alpine</baseImage>
                        <!--镜像启动参数-->
                        <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
                        <resources>
                            <resource>
                                <targetPath>/</targetPath>
                                <directory>${project.build.directory}</directory>
                                <include>${project.build.finalName}.jar</include>
                            </resource>
                        </resources>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>

    三、配置文件:application.yml

    server:
      port: 7900
    spring:
      datasource:
        url: jdbc:mysql://192.168.6.131:53306/sping-cloud-demo?useUnicode=true&characterEncoding=UTF-8
        username: root
        password: admin
        schema: classpath:schema.sql
        data: classpath:data.sql
      jpa:
          hibernate:
            ddl-auto: none #每次启动时不根据实体自动构建数据库结构
            naming:
              strategy: org.hibernate.cfg.ImprovedNamingStrategy #实体和表的映射策略
          properties:
            hibernate:
              dialect: org.hibernate.dialect.MySQL5Dialect  #数据库方言
          show-sql: true
      application:
        name: microservice-provider-user           #虚拟IP名称 virtual Ip
      #zipkin:
        #base-url: http://127.0.0.1:7788
    #日志配置开始
    logging:
      level:
        root: INFO
        org.hibernate: INFO
        org.hibernate.type.descriptor.sql.BasicBinder: TRACE
        org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
        com.itmuch: DEBUG
    #日志配置结束
    #eureka配置开始
    eureka:
      client:
        healthcheck:
          enabled: true            # 开启健康检查(需要spring-boot-starter-actuator依赖)
        serviceUrl:
          defaultZone: http://jacky:admin@peer1:8761/eureka/,http://jacky:admin@peer2:8762/eureka/,http://jacky:admin@peer3:8763/eureka/
      instance:
        prefer-ip-address: true                   # 开启健康检查(需要spring-boot-starter-actuator依赖)
        lease-expiration-duration-in-seconds: 90  #续约到期时间(单位 S)默认是90S
        lease-renewal-interval-in-seconds: 30     # 续约更新时间间隔(默认30秒)
        instance-id: ${spring.application.name}:${spring.cloud.client.ipAddress}:${spring.application.instance_id:${server.port}}
        metadata-map:
          zone: ABC      # eureka可以理解的元数据
          lilizhou: BBC  # 不会影响客户端行为
    #eureka配置结束

    四、用户建表语句(schema.sql)

    DROP TABLE IF EXISTS user;
    create table user(
     id INT NOT NULL AUTO_INCREMENT,
     username varchar(40),
     name varchar(20),
     age int(3),
     balance decimal(10,2),
     primary key(id)
    );

    五、测试数据(data.sql)

    insert into user(id,username, name, age, balance) values(1,'user1', '张三', 20, 100.00);
    insert into user(id,username, name, age, balance) values(2,'user2', '李四', 20, 100.00);
    insert into user(id,username, name, age, balance) values(3,'user3', '王五', 20, 100.00);
    insert into user(id,username, name, age, balance) values(4,'user4', '马六', 20, 100.00);

    六、实体类(User.java)

    package com.jacky.cloud.entity;
    
    import java.math.BigDecimal;
    
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;
    import javax.persistence.Id;
    
    @Entity
    public class User {
    
      public User(Long id, String username) {
        super();
        this.id = id;
        this.username = username;
      }
    
      public User() {
        super();
      }
    
      @Id
      @GeneratedValue(strategy = GenerationType.AUTO)
      private Long id;
    
      @Column
      private String username;
    
      @Column
      private String name;
    
      @Column
      private Short age;
    
      @Column
      private BigDecimal balance;
    
      public Long getId() {
        return this.id;
      }
    
      public void setId(Long id) {
        this.id = id;
      }
    
      public String getUsername() {
        return this.username;
      }
    
      public void setUsername(String username) {
        this.username = username;
      }
    
      public String getName() {
        return this.name;
      }
    
      public void setName(String name) {
        this.name = name;
      }
    
      public Short getAge() {
        return this.age;
      }
    
      public void setAge(Short age) {
        this.age = age;
      }
    
      public BigDecimal getBalance() {
        return this.balance;
      }
    
      public void setBalance(BigDecimal balance) {
        this.balance = balance;
      }
    }

    七、jpa-Repository类

    package com.jacky.cloud.repository;
    
    import com.jacky.cloud.entity.User;
    import org.springframework.data.jpa.repository.JpaRepository;
    import org.springframework.stereotype.Repository;
    
    
    
    @Repository
    public interface UserRepository extends JpaRepository<User, Long> {
    
    }

    八、编写UserController.java

    package com.jacky.cloud.controller;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import com.jacky.cloud.entity.User;
    import com.jacky.cloud.repository.UserRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cloud.client.ServiceInstance;
    import org.springframework.cloud.client.discovery.DiscoveryClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.google.common.collect.Lists;
    
    
    import com.netflix.appinfo.InstanceInfo;
    import com.netflix.discovery.EurekaClient;
    
    @RestController
    public class UserController {
    
      @Autowired
      private UserRepository userRepository;
    
      @Autowired
      private EurekaClient eurekaClient;
    
      @Autowired
      private DiscoveryClient discoveryClient;
    
      @GetMapping("/simple/{id}")
      public User findById(@PathVariable Long id) {
        return this.userRepository.findOne(id);
      }
    
      @GetMapping("/eureka-instance")
      public String serviceUrl() {
        InstanceInfo instance = this.eurekaClient.getNextServerFromEureka("MICROSERVICE-PROVIDER-USER", false);
        return instance.getHomePageUrl();
      }
    
      @GetMapping("/instance-info")
      public ServiceInstance showInfo() {
        ServiceInstance localServiceInstance = this.discoveryClient.getLocalServiceInstance();
        return localServiceInstance;
      }
    
      @PostMapping("/user")
      public User postUser(@RequestBody User user) {
        return user;
      }
    
      // 该请求不会成功
      @GetMapping("/get-user")
      public User getUser(User user) {
        return user;
      }
    
      @GetMapping("list-all")
      public List<User> listAll() {
        ArrayList<User> list = Lists.newArrayList();
        User user = new User(1L, "zhangsan");
        User user2 = new User(2L, "zhangsan");
        User user3 = new User(3L, "zhangsan");
        list.add(user);
        list.add(user2);
        list.add(user3);
        return list;
      }
    }

    九、修改docker-compose.yml文件

    version: "3"
    services:
      peer1:      # 默认情况下,其他服务可以使用服务名称连接到该服务。因此,对于eurekaService1的节点,它需要连接http://eurekaService2/3:951X/eureka/,因此需要配置该服务的名称是eurekaService1。
        image: 192.168.6.132:5000/jacky/microservice-discovery-eureka-ha:1.0-SNAPSHOT
        deploy:
          replicas: 1   #定义 replicated 模式的服务的复本数量
          update_config:
            parallelism: 1    #每次更新复本数量
            delay: 2s       #每次更新间隔
          restart_policy:
            condition: on-failure     #定义服务的重启条件
        networks:
          - eureka-net
        ports:
          - "8761:8761"
        environment:
          - spring.profiles.active=peer1
      peer2:    # 高可用eureka注册节点2
        image: 192.168.6.132:5000/jacky/microservice-discovery-eureka-ha:1.0-SNAPSHOT
        deploy:
          replicas: 1   #定义 replicated 模式的服务的复本数量
          update_config:
            parallelism: 1    #每次更新复本数量
            delay: 2s       #每次更新间隔
          restart_policy:
            condition: on-failure     #定义服务的重启条件
        networks:
          - eureka-net
        ports:
          - "8762:8762"
        environment:
          - spring.profiles.active=peer2
      peer3:    # 高可用eureka注册节点3
        image: 192.168.6.132:5000/jacky/microservice-discovery-eureka-ha:1.0-SNAPSHOT
        deploy:
          replicas: 1   #定义 replicated 模式的服务的复本数量
          update_config:
            parallelism: 1    #每次更新复本数量
            delay: 2s       #每次更新间隔
          restart_policy:
            condition: on-failure     #定义服务的重启条件
        networks:
          - eureka-net
        ports:
          - "8763:8763"
        environment:
          - spring.profiles.active=peer3
      userService:
        image: 192.168.6.132:5000/jacky/microservice-provider-user:1.0-SNAPSHOT
        deploy:
           replicas: 1   #定义 replicated 模式的服务的复本数量
           update_config:
              parallelism: 1    #每次更新复本数量
              delay: 2s       #每次更新间隔
           restart_policy:
              condition: on-failure     #如果某个实例失败,立即重启容器
        networks:
           - eureka-net
        ports:
           - "7900:7900"
    networks:
      eureka-net:            #网络名称
        driver: overlay

    、父项目引入microservice-provider-user模块

    十一、启动类(MicroserviceSimpleProviderUserApplication.java

    package com.jacky.cloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    @SpringBootApplication
    @EnableEurekaClient
    public class MicroserviceSimpleProviderUserApplication {
    
      public static void main(String[] args) {
        SpringApplication.run(MicroserviceSimpleProviderUserApplication.class, args);
      }
    }

    十二、打包

    然后在docker中就可以看到打包成功的镜像

    十三、利用docker-compose启动服务提供者镜像

    把docker-compose.yml上传到linux中,然后

    [root@node1 docker-compose]# docker stack deploy -c docker-compose.yml eureka

    注意:这样执行不会影响到原来运行的eureka集群服务,觉得这点docker做的很人性化

    十四、测试

     

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  • 原文地址:https://www.cnblogs.com/520playboy/p/8057500.html
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