第8章 Jenkins CI/CD拆分

拆分CI和CD流程

1.拆分思路分析

有了Nexus制品上传和下载之后，我们的发布脚本就可以拆解成CI和CD两部分了。

CI流程

下载代码
Maven编译
代码扫描
制品上传

CD流程

下载制品
Ansible部署

拆分后流程图如下：

最佳实践

像这样的发布脚本，我们最好单独一个仓库，和业务代码仓库分开，这样方便后续的管理。

2.拆解CI脚本

[root@jenkins-201 /opt/deploy]# cat jenkins_deploy_ci.sh
#!/bin/bash

# 1.构建镜像
export JAVA_HOME=/opt/jdk8
/opt/maven/bin/mvn -s settings.xml clean package


# 2.代码扫描
if [ "$sonarSkip" == "false" ];then
  /opt/sonar-scanner/bin/sonar-scanner -Dsonar.host.url=http://10.0.0.203:9000 \
  -Dsonar.projectKey=kaoshi-maven-service \
  -Dsonar.projectName=kaoshi-maven-service \
  -Dsonar.projectVersion=${releaseVersion} \
  -Dsonar.token=${sonarToken} \
  -Dsonar.ws.timeout=30 \
  -Dsonar.projectDescription="my first project" \
  -Dsonar.links.homepage=http://10.0.0.203/devops/kaoshi-maven-service \
  -Dsonar.sources=src \
  -Dsonar.sourceEncoding=UTF-8 \
  -Dsonar.java.binaries=target/classes \
  -Dsonar.java.test.binaries=target/test-classes \
  -Dsonar.java.surefire.report=target/surefire-reports
fi


# 3.制品上传
if [ -f "target/xzs-${releaseVersion}.jar" ];then
  /opt/maven/bin/mvn -s settings.xml deploy:deploy-file \
  -DgroupId=com.mindskip \
  -DartifactId=xzs \
  -Dversion=${releaseVersion} \
  -Dpackaging=jar \
  -Dfile=target/xzs-${releaseVersion}.jar \
  -Durl=http://10.0.0.202:8081/repository/kaoshi-release/ \
  -DrepositoryId=releases
fi

3.拆解CD脚本

jenkins调用脚本

[root@jenkins-201 /opt/deploy]# cat jenkins_deploy_cd.sh
#!/bin/bash
#1.下载制品
curl -s -u admin:admin -o /opt/deploy/xzs-${releaseVersion}.jar ${nexusUrl}

#2.替换系统变量
if [ -f "xzs-${releaseVersion}.jar" ];then
  sed -i "/APP_VERSION=/c APP_VERSION=$releaseVersion" kaoshi.env
  sed -i "/APP_ENV=/c APP_ENV=${deployEnv,,}" kaoshi.env
else
  exit
fi

#3.调用Ansible剧本
ansible-playbook -l $deployHosts /opt/deploy/ansible_deploy_cd.yaml -e "app_version=$releaseVersion"

ansible发布脚本:

[root@jenkins-201 /opt/deploy]# cat ansible_deploy_cd.yaml
---
- name: Deploy Kaoshi Application
  hosts: all

  tasks:
    - name: Copy the JAR file to the server
      copy:
        src: "xzs-{{ app_version }}.jar"
        dest: /opt/

    - name: Copy the environment file
      copy:
        src: kaoshi.env
        dest: /etc/systemd/system/kaoshi.env
      notify:
        - restart kaoshi

    - name: Copy the systemd service file
      copy:
        src: kaoshi.service
        dest: /etc/systemd/system/kaoshi.service
      notify:
        - reload systemd
        - restart kaoshi

    - name: Start and enable the kaoshi service
      systemd:
        name: kaoshi
        state: started
        enabled: yes

  handlers:
    - name: reload systemd
      command: systemctl daemon-reload

    - name: restart kaoshi
      systemd:
        name: kaoshi
        state: restarted

启动脚本变量文件:

cat > kaoshi.env << 'EOF'
APP_ENV=prod
APP_VERSION=3.9.2
EOF

启动脚本systemd文件:

cat > kaoshi.service < 'EOF'
[Unit]
Description=Spring Boot Application
After=network.target

[Service]
EnvironmentFile=/etc/systemd/system/kaoshi.env
ExecStart=/opt/jdk/bin/java -Duser.timezone=Asia/Shanghai -jar -Dspring.profiles.active=${APP_ENV} /opt/xzs-${APP_VERSION}.jar
SuccessExitStatus=143
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF