CICD 持续集成与持续交付——jenkins

部署

软件下载：https://mirrors.tuna.tsinghua.edu.cn/jenkins/redhat/

[root@cicd2 ~]# rpm -ivh jdk-11.0.15_linux-x64_bin.rpm

[root@cicd2 ~]# yum install -y fontconfig

[root@cicd2 ~]# rpm -ivh jenkins-2.432-1.1.noarch.rpm

启动服务

[root@cicd2 ~]# systemctl enable --now jenkins.service

[root@cicd2 ~]# netstat -antlp|grep :8080

登录

192.168.92.22:8080

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初始密码

[root@cicd2 ~]# cat /var/lib/jenkins/secrets/initialAdminPassword

安装推荐插件

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无需新建用户，直接使用admin账户

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配置

修改密码

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新建项目

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在jenkins主机上安装git工具

[root@cicd2 ~]# yum install -y git

创建密钥并上传gitlab

[root@cicd2 ~]# ssh-keygen

[root@cicd2 ~]# cat .ssh/id_rsa.pub

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添加gitlab认证凭据

​复制私钥

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配置ssh

[root@cicd2 ~]# vim  /etc/ssh/ssh_config

StrictHostKeyChecking no

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构建触发器

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构建任务

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查看控制台输出

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实时触发

安装gitlab插件

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配置项目触发器

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配置gitlab

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再回到demo项目下配置

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测试推送

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添加jenkins节点

新建虚拟机cicd3

安装jdk和git

[root@cicd3 ~]# rpm -ivh jdk-11.0.15_linux-x64_bin.rpm

[root@cicd3 ~]# yum install -y git

配置解析

[root@cicd3 ~]# cat /etc/hosts

在节点管理中添加节点

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配置从节点

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cicd3 ssh认证

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关闭master节点的构建任务数

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关闭git主机校验

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最后测试构建，构建任务会在docker1节点上运行

自动化构建docker镜像

在cicd3上安装docker-ce

[root@cicd3 ~]# cd /etc/yum.repos.d/

[root@cicd3 yum.repos.d]# cat docker.repo

[root@cicd3 yum.repos.d]# yum install -y docker-ce

修改内核参数

[root@cicd3 ~]# vim /etc/sysctl.d/docker.conf

net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1

[root@cicd3 ~]# sysctl --system

[root@cicd3 ~]# systemctl  enable --now docker

配置docker默认仓库

[root@cicd3 ~]# vim /etc/docker/daemon.json

{
  "registry-mirrors": ["https://reg.westos.org"]
}

[root@cicd3 ~]# systemctl  restart docker

拷贝仓库证书

[root@k8s1 ~]# cd /etc/docker/

[root@k8s1 docker]# scp -r certs.d/ 192.168.92.23:/etc/docker/

[root@cicd3 ~]# ls /etc/docker/certs.d/reg.westos.org/ca.crt

测试

[root@cicd3 ~]# docker pull nginx

登录私有harbor仓库

[root@cicd3 ~]# docker login reg.westos.org

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安装CloudBees Docker Build and Publish插件

​配置项目构建

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在server1上提交Dockerfile

[root@cicd1 dockerfile]# cat Dockerfile

[root@cicd1 demo]# git status -s

[root@cicd1 demo]# git add  Dockerfile

[root@cicd1 demo]# git commit -m "add Dockerfile"

[root@cicd1 demo]# git push -u origin main

此时gitlab会主动触发jenkins构建任务，观察jenkins的任务输出

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通过ssh插件交付任务

jenkins安装ssh插件

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进入系统配置，添加ssh主机

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新建ssh项目

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当docker项目成功运行后触发ssh项目

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构建后查看输出

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RBAC

安装插件

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修改默认授权策略

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新建测试用户

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新建角色​

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用户授权

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使用不同的用户登录，测试权限是否正确

pipeline

安装ssh agent 插件

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新建流水线项目 docker_image_build

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复制一下脚本并做相应修改

pipeline {
    agent any

    stages {
        stage('check out') {
            steps {
                git credentialsId: 'e44734dd-bdce-4a18-9722-bc51ca25ddd6', url: 'git@192.168.92.21:root/dockerfile.git', branch: 'main'
            }
        }
        stage('docker build') {
            steps {
                sh '''
                cd $WORKSPACE
                docker build -t reg.westos.org/library/webserver:${BUILD_NUMBER} .
                '''
            }
        }
        stage('docker push') {
            steps {
                sh '''
                REPOSITORY=reg.westos.org/library/webserver:${BUILD_NUMBER}
                docker tag $REPOSITORY reg.westos.org/library/webserver:latest
                docker login reg.westos.org -u admin -p westos
                docker push $REPOSITORY
                docker push reg.westos.org/library/webserver:latest
                '''
            }
        }
        stage('docker deploy') {
            steps {
		sshagent(credentials: ['044d5700-a59d-4f63-a241-7530117879c3']) {
                    sh '''
                    ssh -o StrictHostKeyChecking=no root@192.168.92.23 """
                    docker ps -a |grep myapp && docker rm -f myapp
                    docker rmi reg.westos.org/library/webserver:latest
                    docker run -d --name myapp -p 80:80 reg.westos.org/library/webserver:latest """
                    '''
                }
            }
        }
    }
}

注意：ssh需要使用ssh免密认证

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jenkins结合ansible参数化构建

主机环境

|-------|---------------|---------------------|
| 主机 | IP | 角色 |
| cicd2 | 192.168.92.22 | jenkins、ansible |
| cicd1 | 192.168.92.21 | 测试机test、devops sudo |
| cicd3 | 192.168.92.23 | 测试机prod、devops sudo |

安装ansible

[root@cicd2 ~]# vim /etc/yum.repos.d/ansible.repo

[ansible]
name=epel
baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/x86_64/
gpgcheck=0

[root@cicd2 ~]# yum install -y ansible

devops是测试机的ssh免密用户，并且配置sudo

[root@cicd1 ~]# useradd devops

[root@cicd1 ~]# echo westos | passwd --stdin devops

[root@cicd1 ~]# visudo

​cicd3同上配置

在ansible主机上以jenkins身份配置ssh免密到所有测试机

[root@cicd2 ~]# usermod -s /bin/bash jenkins

[root@cicd2 ~]# su - jenkins

-bash-4.2$ ssh-keygen

-bash-4.2$ ssh-copy-id devops@192.168.92.21

-bash-4.2$ ssh-copy-id devops@192.168.92.23

新建gitlab项目

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克隆项目

[root@cicd1 ~]# git clone git@192.168.92.21:root/playbook.git

[root@cicd1 ~]# cd playbook/

[root@cicd1 playbook]# vim ansible.cfg

[defaults]
command_warnings=False
remote_user=devops

[privilege_escalation]
become=True
become_method=sudo
become_user=root
become_ask_pass=False

[root@cicd1 playbook]# mkdir inventory

[root@cicd1 playbook]# cd inventory/

[root@cicd1 inventory]# vim test

[test]
192.168.92.21 http_port=8000

[root@cicd1 inventory]# vim prod

[prod]
192.168.92.23 http_port=8080

[root@cicd1 inventory]# cd ..

[root@cicd1 playbook]# vim playbook.yaml

---
- hosts: all
  tasks:
  - name: install the latest version of Apache
    yum:
      name: httpd
      state: latest

  - name: configure apache
    template:
      src: httpd.conf.j2
      dest: /etc/httpd/conf/httpd.conf
    notify: restart apache

  - name: Start service httpd, if not started
    service:
      name: httpd
      state: started
      enabled: yes

  handlers:
  - name: restart apache
    service:
      name: httpd
      state: restarted

[root@cicd1 playbook]# yum install -y httpd

[root@cicd1 playbook]# cp /etc/httpd/conf/httpd.conf .

[root@cicd1 playbook]# mv httpd.conf httpd.conf.j2

[root@cicd1 playbook]# vim httpd.conf.j2

推送项目

[root@cicd1 playbook]# git add .

[root@cicd1 playbook]# git status -s

[root@cicd1 playbook]# git commit -m "add playbook.yaml"

[root@cicd1 playbook]# git push -u origin main

jenkins新建项目playbook

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选择参数构建

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控制台输出

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