基于Jenkins+k8s+Git+DockerHub等技术链构建企业级DevOps容器云平台
K8s版本
python
kubectl get nodesjenkins版本：
最新版
安装Jenkins
安装nfs服务，可以选择自己的任意一台机器，我选择的是k8s的控制节点k8smaster1
如果已经安装过nfs，这个步骤可以忽略
python
yum install nfs-utils -y
systemctl start nfs
systemctl enable nfs在k8smaster1上创建一个nfs共享目录
python
mkdir /data/v2 -p
vim /etc/exports
python
/data/v1 *(rw,no_root_squash)
/data/v2 *(rw,no_root_squash)使配置文件生效
python
exportfs -arv在kubernetes中部署jenkins
创建名称空间
python
kubectl create namespace jenkins-k8s创建pv,上传pv.yaml
python
cat pv.yaml
python
apiVersion: v1
kind: PersistentVolume
metadata:
name: jenkins-k8s-pv
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteMany
nfs:
server: 192.168.40.180
path: /data/v2
python
kubectl apply -f pv.yaml
kubectl get pv创建pvc
python
cat pvc.yaml
python
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: jenkins-k8s-pvc
namespace: jenkins-k8s
spec:
resources:
requests:
storage: 10Gi
accessModes:
- ReadWriteMany
python
kubectl apply -f pvc.yaml
kubectl get pvc -n jenkins-k8s创建一个sa账号
python
kubectl create sa jenkins-k8s-sa -n jenkins-k8s把上面的sa账号做rbac授权
python
kubectl create clusterrolebinding jenkins-k8s-sa-cluster -n jenkins-k8s --clusterrole=cluster-admin --serviceaccount=jenkins-k8s:jenkins-k8s-sa通过deployment部署jenkins
在k8snode节点执行
python
docker pull jenkins/jenkins:2.394
docker save -o jenkins2.394 jenkins/jenkins:2.394
ctr -n=k8s.io images import jenkins2.394
python
docker load -i jenkins-slave-latest.tar.gz
ctr -n=k8s.io images import jenkins-slave-latest.tar.gz备注：jenkins-slave-latest.tar.gz这个里面封装的镜像是jenkins-slave-latest:v1，这个jenkins-slave-latest:v1镜像制作方法如下：
python
cd /root/slave
cat dockerfile
python
FROM jenkins/jnlp-slave:4.13.3-1-jdk11
USER root
# 安装Docker
RUN apt-get update && apt-get install -y \
docker.io
# 将当前用户加入docker用户组
RUN usermod -aG docker jenkins`在这里插入代码片`
RUN curl -LO https://dl.k8s.io/release/stable.txt
RUN curl -LO https://dl.k8s.io/release/$(cat stable.txt)/bin/linux/amd64/kubectl
RUN chmod +x kubectl
RUN mv kubectl /usr/local/bin/
ENV DOCKER_HOST unix:///var/run/docker.sock
python
docker build -t=jenkins-slave-latest:v1 .
docker save -o jenkins-slave-latest.tar.gz jenkins-slave-latest:v1更新资源清单文件
python
kubectl apply -f jenkins-deployment.yaml
kubectl get pods -n jenkins-k8s
python
NAME READY STATUS RESTARTS AGE
jenkins-74b4c59549-g5j9t 0/1 CrashLoopBackOff 3 67s看到jenkins-74b4c59549-g5j9t是CrashLoopBackOff状态，查看日志：
python
kubectl logs jenkins-74b4c59549-g5j9t -n jenkins-k8s
python
日志信息显示：
touch: cannot touch '/var/jenkins_home/copy_reference_file.log': Permission denied
Can not write to /var/jenkins_home/copy_reference_file.log. Wrong volume permissions?
#报错显示没有权限操作/var/jenkins_home/copy_reference_file.log文件，解决办法如下：在k8smaster执行
python
kubectl delete -f jenkins-deployment.yaml
chown -R 1000.1000 /data/v2
python
cat jenkins-deployment.yaml
python
kind: Deployment
apiVersion: apps/v1
metadata:
name: jenkins
namespace: jenkins-k8s
spec:
replicas: 1
selector:
matchLabels:
app: jenkins
template:
metadata:
labels:
app: jenkins
spec:
serviceAccount: jenkins-k8s-sa
containers:
- name: jenkins
image: jenkins/jenkins:2.394
imagePullPolicy: IfNotPresent
ports:
- containerPort: 8080
name: web
protocol: TCP
- containerPort: 50000
name: agent
protocol: TCP
resources:
limits:
cpu: 1000m
memory: 1Gi
requests:
cpu: 500m
memory: 512Mi
livenessProbe:
httpGet:
path: /login
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 5
failureThreshold: 12
readinessProbe:
httpGet:
path: /login
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 5
failureThreshold: 12
volumeMounts:
- name: jenkins-volume
subPath: jenkins-home
mountPath: /var/jenkins_home
volumes:
- name: jenkins-volume
persistentVolumeClaim:
claimName: jenkins-k8s-pvc
python
kubectl apply -f jenkins-deployment.yaml查看pod是否创建成功:
python
kubectl get pods -n jenkins-k8s把jenkins前端加上service，提供外部网络访问
python
cat jenkins-service.yaml
python
apiVersion: v1
kind: Service
metadata:
name: jenkins-service
namespace: jenkins-k8s
labels:
app: jenkins
spec:
selector:
app: jenkins
type: NodePort
ports:
- name: web
port: 8080
targetPort: web
nodePort: 30002
- name: agent
port: 50000
targetPort: agent
python
kubectl apply -f jenkins-service.yaml
kubectl get svc -n jenkins-k8s
通过上面可以看到service的8080端口在物理机映射的端口是30002
配置Jenkins
在浏览器访问jenkins的web界面：
获取管理员密码
在nfs服务端，也就是我们的master1节点获取密码：
python
cat /data/v2/jenkins-home/secrets/initialAdminPassword
把上面获取到的密码拷贝到上面管理员密码下的方框里
点击继续，出现如下界面
安装插件,安装推荐的插件
插件安装好之后显示如下,创建第一个管理员用户
用户名和密码都设置成admin，线上环境需要设置成复杂的密码
修改好之后点击保存并完成，出现如下界面
点击保存并完成，出现如下界面
点击保存并完成，出现如下界面
