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DockerSwarm 微服务部署
来源：cnblogs　　作者：程序员果果　　时间：2019/5/16 9:28:05　　对本文有异议

一、简介

之前《服务Docker化》中，使用 docker-compose.yml 来一次配置启动多个容器，在 Swarm 集群中也可以使用 compose 文件 （docker-compose.yml） 来配置、启动多个服务。
在《DockerSwarm集群环境搭建》中，我们使用docker service create 来部署服务时，一次只能部署一个服务，这一节就讲解 DockerSwarm 集群环境中， 使用 docker-compose.yml 一次启动多个关联的服务。

二、创建 SpringCloud 项目

创建一个springcloud项目 ，包含eureka-server、service-hi、service-ribbon。

1. eureka-server 项目

pom.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <groupId>com.gf</groupId>
  7.     <artifactId>eureka-server</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  11.     <name>eureka-server</name>
  12.     <description>Demo project for Spring Boot</description>
  14.     <parent>
  15.         <groupId>com.gf</groupId>
  16.         <artifactId>chapter02</artifactId>
  17.         <version>0.0.1-SNAPSHOT</version>
  18.     </parent>
  20.     <dependencies>
  21.         <dependency>
  22.             <groupId>org.springframework.boot</groupId>
  23.             <artifactId>spring-boot-starter-web</artifactId>
  24.         </dependency>
  25.         <dependency>
  26.             <groupId>org.springframework.cloud</groupId>
  27.             <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
  28.         </dependency>
  30.         <dependency>
  31.             <groupId>org.springframework.boot</groupId>
  32.             <artifactId>spring-boot-starter-test</artifactId>
  33.             <scope>test</scope>
  34.         </dependency>
  35.     </dependencies>
  37.     <build>
  38.         <plugins>
  39.             <plugin>
  40.                 <groupId>org.springframework.boot</groupId>
  41.                 <artifactId>spring-boot-maven-plugin</artifactId>
  42.                 <executions>
  43.                     <execution>
  44.                         <goals>
  45.                             <goal>repackage</goal>
  46.                         </goals>
  47.                     </execution>
  48.                 </executions>
  49.             </plugin>
  50.         </plugins>
  51.     </build>
  54. </project>

application.yml

  1. server:
  2.   port: 8761
  3. spring:
  4.   application:
  5.     name: eureka-server
  6. eureka:
  7.   client:
  8.     register-with-eureka: false
  9.     fetch-registry: false
  10.     service-url:
  11.       defaultZone: http://eureka-server:8761/eureka/
  12.   instance:
  13.     prefer-ip-address: true
  14.     instance-id: eureka-server:8761

EurekaServerApplication

  1. @EnableEurekaServer
  2. @SpringBootApplication
  3. public class EurekaServerApplication {
  5.     public static void main(String[] args) {
  6.         SpringApplication.run(EurekaServerApplication.class, args);
  7.     }
  8. }

2. service-hi 项目

pom.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <groupId>com.gf</groupId>
  7.     <artifactId>service-hi</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  11.     <name>service-hi</name>
  12.     <description>Demo project for Spring Boot</description>
  14.     <parent>
  15.         <groupId>com.gf</groupId>
  16.         <artifactId>chapter02</artifactId>
  17.         <version>0.0.1-SNAPSHOT</version>
  18.     </parent>
  20.     <dependencies>
  21.         <dependency>
  22.             <groupId>org.springframework.boot</groupId>
  23.             <artifactId>spring-boot-starter-web</artifactId>
  24.         </dependency>
  25.         <dependency>
  26.             <groupId>org.springframework.cloud</groupId>
  27.             <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
  28.         </dependency>
  30.         <dependency>
  31.             <groupId>org.springframework.boot</groupId>
  32.             <artifactId>spring-boot-starter-test</artifactId>
  33.             <scope>test</scope>
  34.         </dependency>
  35.     </dependencies>
  37.     <build>
  38.         <plugins>
  39.             <plugin>
  40.                 <groupId>org.springframework.boot</groupId>
  41.                 <artifactId>spring-boot-maven-plugin</artifactId>
  42.                 <executions>
  43.                     <execution>
  44.                         <goals>
  45.                             <goal>repackage</goal>
  46.                         </goals>
  47.                     </execution>
  48.                 </executions>
  49.             </plugin>
  50.         </plugins>
  51.     </build>
  54. </project>

application.yml

  1. server:
  2.   port: 8763
  3. spring:
  4.   application:
  5.     name: service-hi
  6. eureka:
  7.   client:
  8.     serviceUrl:
  9.       defaultZone: http://eureka-server:8761/eureka/
  10.   instance:
  11.     prefer-ip-address: true
  12.     instance-id: service-hi:8763

ServiceHiApplication

  1. @EnableEurekaClient
  2. @SpringBootApplication
  3. @RestController
  4. public class ServiceHiApplication {
  6.     public static void main(String[] args) {
  7.         SpringApplication.run(ServiceHiApplication.class, args);
  8.     }
  10.     @Value( "${server.port}" )
  11.     private String port;
  13.     @GetMapping("/hi")
  14.     public String hi() {
  15.         return "hello , port is " + port;
  16.     }
  18. }

3. service-ribbon 项目

pom.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <groupId>com.gf</groupId>
  7.     <artifactId>service-ribbon</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  11.     <name>service-ribbon</name>
  12.     <description>Demo project for Spring Boot</description>
  14.     <parent>
  15.         <groupId>com.gf</groupId>
  16.         <artifactId>chapter02</artifactId>
  17.         <version>0.0.1-SNAPSHOT</version>
  18.     </parent>
  20.     <dependencies>
  21.         <dependency>
  22.             <groupId>org.springframework.boot</groupId>
  23.             <artifactId>spring-boot-starter-web</artifactId>
  24.         </dependency>
  25.         <dependency>
  26.             <groupId>org.springframework.cloud</groupId>
  27.             <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
  28.         </dependency>
  29.         <dependency>
  30.             <groupId>org.springframework.cloud</groupId>
  31.             <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
  32.         </dependency>
  34.         <dependency>
  35.             <groupId>org.springframework.boot</groupId>
  36.             <artifactId>spring-boot-starter-test</artifactId>
  37.             <scope>test</scope>
  38.         </dependency>
  39.     </dependencies>
  41.     <build>
  42.         <plugins>
  43.             <plugin>
  44.                 <groupId>org.springframework.boot</groupId>
  45.                 <artifactId>spring-boot-maven-plugin</artifactId>
  46.                 <executions>
  47.                     <execution>
  48.                         <goals>
  49.                             <goal>repackage</goal>
  50.                         </goals>
  51.                     </execution>
  52.                 </executions>
  53.             </plugin>
  54.         </plugins>
  55.     </build>
  58. </project>

application.yml

  1. server:
  2.   port: 8764
  3. spring:
  4.   application:
  5.     name: service-ribbon
  6. eureka:
  7.   client:
  8.     serviceUrl:
  9.       defaultZone: http://eureka-server:8761/eureka/
  10.   instance:
  11.     prefer-ip-address: true
  12.     instance-id: eureka-server:8764

HelloService

  1. @Service
  2. public class HelloService {
  4.     @Autowired
  5.     private RestTemplate restTemplate;
  7.     public String hiService() {
  8.         return restTemplate.getForObject( "http://service-hi:8763/hi" , String.class );
  9.     }
  11. }

HelloControler

  1. @RestController
  2. public class HelloControler {
  4.     @Autowired
  5.     private HelloService helloService;
  7.     @GetMapping(value = "/hi")
  8.     public String hi() {
  9.         return helloService.hiService();
  10.     }
  12. }

ServiceRibbonApplication

  1. @SpringBootApplication
  2. @EnableEurekaClient
  3. @EnableDiscoveryClient
  4. public class ServiceRibbonApplication {
  6.     public static void main(String[] args) {
  7.         SpringApplication.run(ServiceRibbonApplication.class, args);
  8.     }
  10.     @Bean
  11.     @LoadBalanced
  12.     RestTemplate restTemplate() {
  13.         return new RestTemplate();
  14.     }
  15. }

三、构建镜像

1. Dockerfile

编写Dockerfile ，把项目构建成镜像，需要把 项目jar包 复制到 镜像中，而且镜像中要有java的运行环境，所以现在给每个项目都创建一个Dockerfile，内容如下：

eureka-server 项目的 Dockerfile

  1. FROM hub.gf.com:9090/jdk/openjdk:8-jre
  3. MAINTAINER gf gf@163.com
  5. COPY target/eureka-server-0.0.1-SNAPSHOT.jar /eureka-server-0.0.1-SNAPSHOT.jar
  7. ENTRYPOINT ["java" , "-jar" , "/eureka-server-0.0.1-SNAPSHOT.jar"]

service-hi 项目的 Dockerfile

  1. FROM hub.gf.com:9090/jdk/openjdk:8-jre
  3. MAINTAINER gf gf@163.com
  5. COPY target/service-hi-0.0.1-SNAPSHOT.jar /service-hi-0.0.1-SNAPSHOT.jar
  7. ENTRYPOINT ["java" , "-jar" , "/service-hi-0.0.1-SNAPSHOT.jar"]

service-ribbon 项目的 Dockerfile

  1. #!/usr/bin/env bash
  3. mvn package -Dmaven.test.skip=true
  5. docker build -t hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest .
  7. docker login -u admin -p Harbor12345 hub.gf.com:9090
  9. docker push hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest

2. 创建 build.sh

为了方便，三个项目根目录下创建 build.sh 脚本，来一键执行项目的打jar包、构建镜像、推送到私有仓库。

eureka-server 项目的 build.sh

  1. #!/usr/bin/env bash
  3. mvn package -Dmaven.test.skip=true
  6. docker build -t hub.gf.com:9090/springboot-ribbon/eureka-server:latest .
  8. docker login -u admin -p Harbor12345 hub.gf.com:9090
  10. docker push hub.gf.com:9090/springboot-ribbon/eureka-server:latest

service-hi 项目的 build.sh

  1. #!/usr/bin/env bash
  3. mvn package -Dmaven.test.skip=true
  5. docker build -t hub.gf.com:9090/springboot-ribbon/service-hi:latest .
  7. docker login -u admin -p Harbor12345 hub.gf.com:9090
  9. docker push hub.gf.com:9090/springboot-ribbon/service-hi:latest

service-ribbon 项目的 build.sh

  1. #!/usr/bin/env bash
  3. mvn package -Dmaven.test.skip=true
  5. docker build -t hub.gf.com:9090/springboot-ribbon/service-ribbon:latest .
  7. docker login -u admin -p Harbor12345 hub.gf.com:9090
  9. docker push hub.gf.com:9090/springboot-ribbon/service-ribbon:latest

分别执行三个 build.sh 脚本，这样私有仓库就有三个项目的镜像了，如图：

三、部署服务

1. 启动集群环境

启动之前搭建好的 docker swarm 集群环境：

  1. docker-machine start myvm-1 myvm-2 myvm-3

要在管理节点下部署服务，所以需要知道哪台是管理节点，随便连接一台机器，通过 docker node 命令查看节点信息：

  1. docker-machine ssh myvm-1
  1. docker node ls
  2. ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
  3. ib1498ex2q18i7gznb2zgicqq *   myvm-1              Ready               Active              Leader              18.09.1-beta2
  4. vels0fe3eh5s5cxj1s573v9wx     myvm-2              Ready               Active              Reachable           18.09.1-beta2
  5. obxnnqelh4p16wajrwvyn6j8v     myvm-3              Ready               Active              Reachable           18.09.1-beta2

myvm-1 就是管理节点，不需要切换节点了。

2. 编写 services.yml

之后用 docker stack 部署服务，所以需要编写服务编排文件，内容如下：

  1. version: "3.4"
  2. services:
  3.   eureka-server:
  4.     image: hub.gf.com:9090/springcloud-ribbon/eureka-server:latest
  5.     deploy:
  6.       endpoint_mode: vip
  7.       resources:
  8.         limits:
  9.           cpus: "0.5"
  10.           memory: "1024M"
  11.     ports:
  12.       - "8761:8761"
  14.   service-hi:
  15.     image: hub.gf.com:9090/springcloud-ribbon/service-hi:latest
  16.     deploy:
  17.       endpoint_mode: vip
  18.       resources:
  19.         limits:
  20.           cpus: "0.5"
  21.           memory: "1024M"
  22.     ports:
  23.       - "8763:8763"
  24.     depends_on:
  25.       - eureka-server
  27.   service-ribbon:
  28.     image: hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest
  29.     deploy:
  30.       endpoint_mode: vip
  31.       resources:
  32.         limits:
  33.           cpus: "0.5"
  34.           memory: "1024M"
  35.     ports:
  36.       - "8764:8764"
  37.     depends_on:
  38.       - eureka-server
  39.       - service-hi
  41. networks:
  42.   default:
  43.     external:
  44.       name: my-overlay

文件详细说明，这里就不说了，可以网上查一下。

3. 启动服务

通过 docker stack deploy 命令 启动服务：

  1. docker stack deploy -c services.yml ms

通过 docker service ls 查看服务启动状态：

  1. docker service ls
  2. ID                  NAME                MODE                REPLICAS            IMAGE                                                      PORTS
  3. q99gd5rquv3f        ms_eureka-server    replicated          1/1                 hub.gf.com:9090/springcloud-ribbon/eureka-server:latest    *:8761->8761/tcp
  4. wjsv5s6fce6k        ms_service-hi       replicated          1/1                 hub.gf.com:9090/springcloud-ribbon/service-hi:latest       *:8763->8763/tcp
  5. zjwe7cnpn42y        ms_service-ribbon   replicated          1/1                 hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest   *:8764->8764/tcp

服务启动后 ，访问 192.168.99.100:8761 , 192.168.99.100:8763/hi , 192.168.99.100:8764/hi ，都可以正常访问，说明已经部署成功了。

原文链接：http://www.cnblogs.com/huanchupkblog/p/10870844.html

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