1、安装和启动docker
yum update -y
yum install -y yum-utils
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum -y install docker-ce
systemctl start docker
2、设置镜像
vi /etc/docker/daemon.json
{
  "registry-mirrors": ["https://aj2rgad5.mirror.aliyuncs.com"]
}3、开放管理端口映射
vi /lib/systemd/system/docker.service
将第11行的ExecStart=/usr/bin/dockerd，替换为：
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock -H tcp://0.0.0.0:7654
2375是管理端口，7654是备用端口
在~/.bashrc中写入docker管理端口
export DOCKER_HOST=tcp://0.0.0.0:2375
source ~/.bashrc
4、重启docker
systemctl daemon-reload && service docker restart
5、测试docker是否正常安装和运行
docker run hello-world
Hello from Docker!
This message shows that your installation appears to be working correctly.1、安装maven
wget http://mirror.bit.edu.cn/apache/maven/maven-3/3.5.0/binaries/apache-maven-3.5.0-bin.tar.gz
tar -zxvf apache-maven-3.5.0-bin.tar.gz
vi ~/.bashrc
export  MAVEN_HOME=/usr/local/apache-maven-3.5.0
export PATH=$PATH:$MAVEN_HOME/binsource ~/.bashrc
mvn -version
cd /usr/local/apache-maven-3.5.0/conf
vi settings.xml
<mirror>
  <id>nexus-aliyun</id>
  <mirrorOf>*</mirrorOf>
  <name>Nexus aliyun</name>
  <url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>2、安装git
yum install -y git
git --version
3、将代码推送到github中
1、新建一个任务
2、构建一个自由风格的软件项目
3、配置Github，包括github地址，用户名和密码，分支
4、配置构建环境
增加构建步骤 -> invoker top-level-Maven targets
Maven version: maven3.5.0
Goals: clean package
POM: pom.xml5、增加构建步骤 -> execute shell
#!/bin/bash
REGISTRY_URL=192.168.189.54:2375
WORK_DIR=/root/work_build
PROJECT_NAME=eureka-server
PROJECT_VERSION=0.0.1-SNAPSHOT
if [ ! -e ${WORK_DIR}/${PROJECT_NAME} ] && [ ! -d ${WORK_DIR}/${PROJECT_NAME} ]; then
mkdir -p ${WORK_DIR}/${PROJECT_NAME}
echo "Create Dir: ${WORK_DIR}/${PROJECT_NAME}"
fi
if [ -e ${WORK_DIR}/${PROJECT_NAME}/Dockerfile ]; then
rm -rf ${WORK_DIR}/${PROJECT_NAME}/Dockerfile
echo "Remove File: ${WORK_DIR}/${PROJECT_NAME}/Dockerfile"
fi
cp /root/.jenkins/workspace/eureka-server/Dockerfile ${WORK_DIR}/${PROJECT_NAME}/
cp /root/.jenkins/workspace/eureka-server/target/*.jar ${WORK_DIR}/${PROJECT_NAME}/
cd ${WORK_DIR}/${PROJECT_NAME}/
docker build -t ${REGISTRY_URL}/eshop-detail/${PROJECT_NAME}:${PROJECT_VERSION} .
docker push ${REGISTRY_URL}/eshop-detail/${PROJECT_NAME}:${PROJECT_VERSION}
if docker ps -a | grep ${PROJECT_NAME}; then
docker rm -f ${PROJECT_NAME}
echo "Remove Docker Container: ${PROJECT_NAME}"
fi
docker run -d -p 8761:8761 --name ${PROJECT_NAME} ${REGISTRY_URL}/eshop-detail/${PROJECT_NAME}:${PROJECT_VERSION}6、执行一些修改
（1）修改1：在系统配置中设置maven，然后在配置中选择自己配置的maven版本，解决cannot run mvn program的错误
（2）修改2：编写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 87617、执行构建
8、访问http://192.168.31.253:8761/，可以看到eureka-server的页面