天天看點
傳回

第十篇 : DockerSwarm 微服務部署

一、簡介

之前《服務Docker化》中，使用 docker-compose.yml 來一次配置啟動多個容器，在 Swarm 叢集中也可以使用 compose 檔案 （docker-compose.yml） 來配置、啟動多個服務。

在《DockerSwarm叢集環境搭建》中，我們使用docker service create 來部署服務時，一次隻能部署一個服務，這一節就講解 DockerSwarm 叢集環境中， 使用 docker-compose.yml 一次啟動多個關聯的服務。

二、建立 SpringCloud 項目

建立一個springcloud項目 ，包含eureka-server、service-hi、service-ribbon。

1. eureka-server 項目

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: false
    fetch-registry: false
    service-url:
      defaultZone: http://eureka-server:8761/eureka/
  instance:
    prefer-ip-address: true
    instance-id: eureka-server:8761

EurekaServerApplication 

@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {

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

2. service-hi 項目

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: true
    instance-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 項目

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: true
    instance-id: eureka-server:8764

HelloService 

@Service
public class HelloService {

    @Autowired
    private RestTemplate restTemplate;

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

}

HelloControler 

@RestController
public class HelloControler {

    @Autowired
    private 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
	@LoadBalanced
	RestTemplate restTemplate() {
		return new RestTemplate();
	}
}

三、建構鏡像

1. Dockerfile

編寫Dockerfile ，把項目建構成鏡像，需要把 項目jar包 複制到 鏡像中，而且鏡像中要有java的運作環境，是以現在給每個項目都建立一個Dockerfile，内容如下：

eureka-server 項目的 Dockerfile

FROM hub.gf.com:9090/jdk/openjdk:8-jre

MAINTAINER gf [email protected]

COPY target/eureka-server-0.0.1-SNAPSHOT.jar /eureka-server-0.0.1-SNAPSHOT.jar

ENTRYPOINT ["java" , "-jar" , "/eureka-server-0.0.1-SNAPSHOT.jar"]

service-hi 項目的 Dockerfile

FROM hub.gf.com:9090/jdk/openjdk:8-jre

MAINTAINER gf [email protected]63.com

COPY target/service-hi-0.0.1-SNAPSHOT.jar /service-hi-0.0.1-SNAPSHOT.jar

ENTRYPOINT ["java" , "-jar" , "/service-hi-0.0.1-SNAPSHOT.jar"]

service-ribbon 項目的 Dockerfile

#!/usr/bin/env bash

mvn package -Dmaven.test.skip=true

docker build -t hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest .

docker login -u admin -p Harbor12345 hub.gf.com:9090

docker push hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest

2. 建立 build.sh

為了友善，三個項目根目錄下建立 build.sh 腳本，來一鍵執行項目的打jar包、建構鏡像、推送到私有倉庫。

eureka-server 項目的 build.sh

#!/usr/bin/env bash

mvn package -Dmaven.test.skip=true


docker build -t hub.gf.com:9090/springboot-ribbon/eureka-server:latest .

docker login -u admin -p Harbor12345 hub.gf.com:9090

docker push hub.gf.com:9090/springboot-ribbon/eureka-server:latest

service-hi 項目的 build.sh

#!/usr/bin/env bash

mvn package -Dmaven.test.skip=true

docker build -t hub.gf.com:9090/springboot-ribbon/service-hi:latest .

docker login -u admin -p Harbor12345 hub.gf.com:9090

docker push hub.gf.com:9090/springboot-ribbon/service-hi:latest

service-ribbon 項目的 build.sh

#!/usr/bin/env bash

mvn package -Dmaven.test.skip=true

docker build -t hub.gf.com:9090/springboot-ribbon/service-ribbon:latest .

docker login -u admin -p Harbor12345 hub.gf.com:9090

docker push hub.gf.com:9090/springboot-ribbon/service-ribbon:latest

分别執行三個 build.sh 腳本，這樣私有倉庫就有三個項目的鏡像了，如圖：

第十篇 : DockerSwarm 微服務部署

三、部署服務

1. 啟動叢集環境

啟動之前搭建好的 docker swarm 叢集環境：

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

要在管理節點下部署服務，是以需要知道哪台是管理節點，随便連接配接一台機器，通過 docker node 指令檢視節點資訊：

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 就是管理節點，不需要切換節點了。

2. 編寫 services.yml

之後用 docker stack 部署服務，是以需要編寫服務編排檔案，内容如下：

version: "3.4"
services:
  eureka-server:
    image: hub.gf.com:9090/springcloud-ribbon/eureka-server:latest
    deploy:
      endpoint_mode: vip
      resources:
        limits:
          cpus: "0.5"
          memory: "1024M"
    ports:
      - "8761:8761"

  service-hi:
    image: hub.gf.com:9090/springcloud-ribbon/service-hi:latest
    deploy:
      endpoint_mode: vip
      resources:
        limits:
          cpus: "0.5"
          memory: "1024M"
    ports:
      - "8763:8763"
    depends_on:
      - eureka-server

  service-ribbon:
    image: hub.gf.com:9090/springcloud-ribbon/service-ribbon:latest
    deploy:
      endpoint_mode: vip
      resources:
        limits:
          cpus: "0.5"
          memory: "1024M"
    ports:
      - "8764:8764"
    depends_on:
      - eureka-server
      - service-hi

networks:
  default:
    external:
      name: my-overlay

檔案詳細說明，這裡就不說了，可以網上查一下。

3. 啟動服務

通過 docker stack deploy 指令 啟動服務：

docker stack deploy -c services.yml ms

通過 docker service ls 檢視服務啟動狀态：

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

服務啟動後 ，通路 192.168.99.100:8761 , 192.168.99.100:8763/hi , 192.168.99.100:8764/hi ，都可以正常通路，說明已經部署成功了。

第十篇 : DockerSwarm 微服務部署

掃碼關注我的公衆号，精彩内容不能錯過！

Docker springCloud
上一篇: 2015BJOI day1第三題 糖果candy
下一篇: BZOJ1001: [BeiJing2006]狼抓兔子（洛谷P4001）平面圖最小割-&gt;對偶圖最短路

繼續閱讀