Eureka server for Docker

Eureka简介

Eureka是Netflix开发的服务发现框架，本身是一个基于REST的服务，主要用于定位运行在AWS域中的中间层服务，以达到负载均衡和中间层服务故障转移的目的。Spring Cloud将它集成在其子项目spring-cloud-netflix中，以实现Spring Cloud的服务发现功能。

Quick Start

先上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">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.fiveplus</groupId>
	<artifactId>eureka-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-server</name>
	<description>Eureka project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.8.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Dalston.SR4</spring-cloud.version>
		<docker.image.prefix>spring-boot</docker.image.prefix>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka-server</artifactId>
		</dependency>

		<!-- Spring安全模块 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>

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

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<!--  Linux Service config
				<configuration>
					<executable>true</executable>
				</configuration>
				 -->
			</plugin>
			<!-- tag:plugin[] -->
			<plugin>
				<groupId>com.spotify</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<version>0.4.11</version>
				<configuration>
					<imageName>${docker.image.prefix}/${project.artifactId}</imageName>
					<dockerDirectory>src/main/docker</dockerDirectory>
					<resources>
            <resource>
              <targetPath>/</targetPath>
              <directory>${project.build.directory}</directory>
              <include>${project.build.finalName}.jar</include>
            </resource>
          </resources>
				</configuration>
			</plugin>
			<!-- end::plugin[] -->
		</plugins>
	</build>

</project>

上面的pom文件集成了spring-security安全模块，不需要的同学可以去掉。

然后上application.properties

server.port=8761

eureka.instance.hostname=localhost
eureka.instance.prefer-ip-address=true
eureka.instance.lease-renewal-interval-in-seconds=30
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

eureka.server.enable-self-preservation=false

security.basic.enabled=true
security.user.name=fiveplus
security.user.password=123456

eureka.client.service-url.default-zone=http://${security.user.name}:${security.user.password}@${eureka.instance.hostname}:${server.port}/eureka/

接下来是Application.java

package com.fiveplus;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer
@SpringBootApplication
public class Application {

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

然后编写Dockerfile

在maven项目下新建文件夹src/main/docker，创建文件Dockerfile

FROM frolvlad/alpine-oraclejdk8:slim
VOLUME /tmp
ADD eureka-server-0.0.1-SNAPSHOT.jar app.jar
#RUN bash -c 'touch /app.jar'
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
EXPOSE 8761

编译docker image

mvn clean package docker:build -DskipTests

生产环境部署

上传jar和Dockerfile文件到同一目录下，运行命令

docker build -t fiveplus/eureka-server .