构建前提条件
编程环境ubuntu,jdk8,maven,已可以使用mvn在本地成功运行的spring-boot工程的eureka-server
步骤1 安装docker
开始安装
由于apt官方库里的docker版本可能比较旧,所以先卸载可能存在的旧版本:
$ sudo apt-get remove docker docker-engine docker-ce docker.io
更新apt包索引:
$ sudo apt-get update
安装以下包以使apt可以通过HTTPS使用存储库(repository):
$ sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
添加Docker官方的GPG密钥:
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
使用下面的命令来设置stable存储库:
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
再更新一下apt包索引:
$ sudo apt-get update
安装最新版本的Docker CE:
$ sudo apt-get install -y docker-ce
验证docker
查看docker服务是否启动:
$ systemctl status docker
若未启动,则启动docker服务:
$ sudo systemctl start docker
步骤2 配置spring-boot工程对docker的依赖
1.配置pom.xml文件,文件全景
<?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>org.demo</groupId>
<artifactId>eureka</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Eureka Server</name>
<description>Eureka Server demo project</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<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-config</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>Finchley.BUILD-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<start-class>eurekademo.EurekaApplication</start-class>
<java.version>1.8</java.version>
<docker.image.prefix>springcloud</docker.image.prefix>
</properties>
<build>
<plugins>
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>0.2.3</version>
<configuration>
<imageName>${project.artifactId}:${project.version}</imageName>
<dockerDirectory>${project.basedir}/src/main/resources</dockerDirectory>
<!-- <baseImage>openjdk:8-jre-alpine</baseImage>
<imageName>${docker.image.prefix}/${project.artifactId}</imageName>
<exposes>8761</exposes>
<entryPoint>["java", "-Djava.security.egd=file:/dev/./urandom", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
--> <resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<!-- defined in spring-cloud-starter-parent pom (as documentation hint),
but needs to be repeated here -->
<configuration>
<requiresUnpack>
<dependency>
<groupId>com.netflix.eureka</groupId>
<artifactId>eureka-core</artifactId>
</dependency>
<dependency>
<groupId>com.netflix.eureka</groupId>
<artifactId>eureka-client</artifactId>
</dependency>
</requiresUnpack>
</configuration>
</plugin>
<plugin>
<groupId>pl.project13.maven</groupId>
<artifactId>git-commit-id-plugin</artifactId>
<configuration>
<failOnNoGitDirectory>false</failOnNoGitDirectory>
</configuration>
</plugin>
<plugin>
<!--skip deploy (this is just a test module) -->
<artifactId>maven-deploy-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/libs-snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/libs-milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/libs-snapshot-local</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/libs-milestone-local</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
文件中的 <imageName>${project.artifactId}:${project.version}</imageName>
<dockerDirectory>${project.basedir}/src/main/resources</dockerDirectory>
表示生成的docker image的名称,和dockerfile的路径,配置好后,在设置的路径下新建Dockerfile文件,注意文件没有后缀名
文件内的代码如下:
#基于哪个镜像
FROM java:8
# 将本地文件夹挂载到当前容器
VOLUME /tmp
# 拷贝文件到容器,也可以直接写成ADD chu-eureka-0.0.1-SNAPSHOT.jar /app.jar
ADD eureka-0.0.1-SNAPSHOT.jar app.jar
RUN bash -c 'touch /app.jar'
#环境变量 设置上海时区
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
# 开放8761端口
EXPOSE 8761
# 配置容器启动后执行的命令
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
步骤3 构建指令
将eureak打包
mvn clean package -Dmaven.test.skip=true
docker构建镜像,注意要使用root用户进行构建,防止构建过程中出现权限不够的情况。查看上一步生成的jar的文件名称,在Dockerfile文件中将ADD后面的jar改为相应生成的文件名称。
mvn clean package -Dmaven.test.skip=true docker:build
查看构建是否成功
docker images
步骤4 运行镜像
sudo docker run -p 8080:8080 -d demo:0.0.1-SNAPSHOT
其中的8080端口号,是application。properties文件中设置的端口号。