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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

<?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"><modelVersion>4.0.0</modelVersion><groupId>com.gf</groupId><artifactId>eureka-server</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>eureka-server</name><description>Demo project for Spring Boot</description><parent><groupId>com.gf</groupId><artifactId>chapter02</artifactId><version>0.0.1-SNAPSHOT</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>

application.yml

server:port: 8761
spring:application:name: eureka-server
eureka:client:register-with-eureka: falsefetch-registry: falseservice-url:defaultZone: http://eureka-server:8761/eureka/instance:prefer-ip-address: trueinstance-id: eureka-server:8761

EurekaServerApplication

@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {public static void main(String[] args) {SpringApplication.run(EurekaServerApplication.class, args);}
}

2. service-hi 项目

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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.gf</groupId><artifactId>service-hi</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>service-hi</name><description>Demo project for Spring Boot</description><parent><groupId>com.gf</groupId><artifactId>chapter02</artifactId><version>0.0.1-SNAPSHOT</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>

application.yml

server:port: 8763
spring:application:name: service-hi
eureka:client:serviceUrl:defaultZone: http://eureka-server:8761/eureka/instance:prefer-ip-address: trueinstance-id: service-hi:8763

ServiceHiApplication

@EnableEurekaClient
@SpringBootApplication
@RestController
public class ServiceHiApplication {public static void main(String[] args) {SpringApplication.run(ServiceHiApplication.class, args);}@Value( "${server.port}" )private String port;@GetMapping("/hi")public String hi() {return "hello , port is " + port;}}

3. service-ribbon 项目

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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.gf</groupId><artifactId>service-ribbon</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>service-ribbon</name><description>Demo project for Spring Boot</description><parent><groupId>com.gf</groupId><artifactId>chapter02</artifactId><version>0.0.1-SNAPSHOT</version></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-server</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-ribbon</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>

application.yml

server:port: 8764
spring:application:name: service-ribbon
eureka:client:serviceUrl:defaultZone: http://eureka-server:8761/eureka/instance:prefer-ip-address: trueinstance-id: eureka-server:8764

HelloService

@Service
public class HelloService {@Autowiredprivate RestTemplate restTemplate;public String hiService() {return restTemplate.getForObject( "http://service-hi:8763/hi" , String.class );}}

HelloControler

@RestController
public class HelloControler {@Autowiredprivate HelloService helloService;@GetMapping(value = "/hi")public String hi() {return helloService.hiService();}}

ServiceRibbonApplication

@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class ServiceRibbonApplication {public static void main(String[] args) {SpringApplication.run(ServiceRibbonApplication.class, args);}@Bean@LoadBalancedRestTemplate restTemplate() {return new RestTemplate();}
}

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

FROM hub.gf.com:9090/jdk/openjdk:8-jreMAINTAINER gf gf@163.comCOPY target/eureka-server-0.0.1-SNAPSHOT.jar /eureka-server-0.0.1-SNAPSHOT.jarENTRYPOINT ["java" , "-jar" , "/eureka-server-0.0.1-SNAPSHOT.jar"]

service-hi 项目的 Dockerfile

FROM hub.gf.com:9090/jdk/openjdk:8-jreMAINTAINER gf gf@163.comCOPY target/service-hi-0.0.1-SNAPSHOT.jar /service-hi-0.0.1-SNAPSHOT.jarENTRYPOINT ["java" , "-jar" , "/service-hi-0.0.1-SNAPSHOT.jar"]

service-ribbon 项目的 Dockerfile

#!/usr/bin/env bashmvn package -Dmaven.test.skip=truedocker build -t hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest .docker login -u admin -p Harbor12345 hub.gf.com:9090docker 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

#!/usr/bin/env bashmvn package -Dmaven.test.skip=truedocker build -t hub.gf.com:9090/springboot-ribbon/eureka-server:latest .docker login -u admin -p Harbor12345 hub.gf.com:9090docker push hub.gf.com:9090/springboot-ribbon/eureka-server:latest

service-hi 项目的 build.sh

#!/usr/bin/env bashmvn package -Dmaven.test.skip=truedocker build -t hub.gf.com:9090/springboot-ribbon/service-hi:latest .docker login -u admin -p Harbor12345 hub.gf.com:9090docker push hub.gf.com:9090/springboot-ribbon/service-hi:latest

service-ribbon 项目的 build.sh

#!/usr/bin/env bashmvn package -Dmaven.test.skip=truedocker build -t hub.gf.com:9090/springboot-ribbon/service-ribbon:latest .docker login -u admin -p Harbor12345 hub.gf.com:9090docker 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：

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：

docker-machine ssh myvm-1

docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
ib1498ex2q18i7gznb2zgicqq *   myvm-1              Ready               Active              Leader              18.09.1-beta2
vels0fe3eh5s5cxj1s573v9wx     myvm-2              Ready               Active              Reachable           18.09.1-beta2
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：

version: "3.4"
services:eureka-server:image: hub.gf.com:9090/springcloud-ribbon/eureka-server:latestdeploy:endpoint_mode: vipresources:limits:cpus: "0.5"memory: "1024M"ports:- "8761:8761"service-hi:image: hub.gf.com:9090/springcloud-ribbon/service-hi:latestdeploy:endpoint_mode: vipresources:limits:cpus: "0.5"memory: "1024M"ports:- "8763:8763"depends_on:- eureka-serverservice-ribbon:image: hub.gf.com:9090/springcloud-ribbon/service-ribbon:latestdeploy:endpoint_mode: vipresources:limits:cpus: "0.5"memory: "1024M"ports:- "8764:8764"depends_on:- eureka-server- service-hinetworks:default:external: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：

docker stack deploy -c services.yml ms

通过 docker service ls 查看服务启动状态：

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

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