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一、概念

官网：使用 Jenkins

1.原理

jenkins是一款开源的CI&CD软件，用于自动化各种任务，包括构建、测试和部署软件

2.pipline（流水线）和blueocean

pipline：操作过程和步骤，拉取代码、编译、测试、部署、镜像制作等操作blueocean是可以用来图形化管理（编写、查看、修改等）我们的流水线。是pipline的可视化UI。

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二、使用docker安装部署

1.拉取镜像

[root@k8snode-1 ~]# docker pull jenkinsci/blueocean

2.启动容器

docker run \
--name sc-jenkins-1 \
-u root \
-d \
-p 8080:8080 \
-p 50000:50000 \
-v jenkins-data:/var/jenkins_home \
-v /var/run/docker.sock:/var/run/docker.sock \
jenkinsci/blueocean

[root@k8snode-1 ~]# docker ps
CONTAINER ID   IMAGE                                               COMMAND                   CREATED         STATUS         PORTS                                                                                      NAMES
d824ac703b38   jenkinsci/blueocean                                 "/sbin/tini -- /usr/…"   5 seconds ago   Up 4 seconds   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp   sc-jenkins-1

3.访问验证

4.解锁Jenkins

[root@k8snode-1 ~]# docker ps |grep -i jenkins
d824ac703b38   jenkinsci/blueocean                                 "/sbin/tini -- /usr/…"   13 minutes ago   Up 13 minutes   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp   sc-jenkins-1

[root@k8snode-1 ~]# docker exec -it  sc-jenkins-1 bash

#查看登陆密码
bash-5.1#  cat /var/jenkins_home/secrets/initialAdminPassword
97ae6e914ab24130a8d9dfa12c07b952

5.安装相关插件

三、使用k8s安装部署

1.准备工作

官网：Kubernetes

1.1.下载git

[root@k8smaster ~]# yum install git -y

1.2.从代码仓库拉取相关文件

[root@k8smaster ~]# git clone https://github.com/scriptcamp/kubernetes-jenkins
[root@k8smaster kubernetes-jenkins]# ls
deployment.yaml  namespace.yaml  serviceAccount.yaml  service.yaml  volume.yaml

2.创建相关命名空间

[root@k8smaster kubernetes-jenkins]# kubectl apply -f namespace.yaml
namespace/devops-tools created
[root@k8smaster kubernetes-jenkins]# kubectl get ns
NAME              STATUS   AGE
default           Active   105d
devops-tools      Active   7s

3.创建服务账号绑定集群角色

[root@k8smaster kubernetes-jenkins]# kubectl  apply -f serviceAccount.yaml 
clusterrole.rbac.authorization.k8s.io/jenkins-admin created
serviceaccount/jenkins-admin created
clusterrolebinding.rbac.authorization.k8s.io/jenkins-admin created

4.创建卷（存储数据）

4.1.查看节点信息

[root@k8smaster kubernetes-jenkins]# kubectl get node
NAME        STATUS   ROLES                  AGE    VERSION
k8smaster   Ready    control-plane,master   105d   v1.20.6
k8snode-1   Ready    worker                 105d   v1.20.6
k8snode-2   Ready    worker                 104d   v1.20.6

4.2.修改volume.yaml 文件，改成自己的主机名

4.3.创建卷

[root@k8smaster kubernetes-jenkins]# kubectl apply -f volume.yaml 
storageclass.storage.k8s.io/local-storage created
persistentvolume/jenkins-pv-volume created
persistentvolumeclaim/jenkins-pv-claim created

5.部署Jenkins

建议先删除之前使用docker容器安装的jenkins

[root@k8snode-1 ~]# docker stop sc-jenkins-1
sc-jenkins-1

[root@k8smaster kubernetes-jenkins]# kubectl apply  -f deployment.yaml 
deployment.apps/jenkins created

6.启动服务发布Jenkins的pod

[root@k8smaster kubernetes-jenkins]# kubectl apply -f service.yaml 
service/jenkins-service created

[root@k8smaster kubernetes-jenkins]# kubectl get svc -n devops-tools
NAME              TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
jenkins-service   NodePort   10.108.82.214   <none>        8080:32000/TCP   25s

7.访问验证

可以访问k8s集群中的任何一台机器