参考文档
https://blog.csdn.net/aixiaoyang168/article/details/79767649
https://github.com/jenkinsci/kubernetes-plugin/tree/master/src/main/kubernetes
https://www.cnblogs.com/cocowool/p/kubernetes_statefulset.html
https://www.cnblogs.com/cocowool/p/kubernetes_storage.html文档目录
- kubernetes1.13.1+etcd3.3.10+flanneld0.10集群部署
- kubernetes1.13.1部署kuberneted-dashboard v1.10.1
- kubernetes1.13.1部署coredns
- kubernetes1.13.1部署ingress-nginx并配置https转发dashboard
- kubernetes1.13.1部署metrics-server0.3.1
- kubernetes1.13.1集群使用ceph rbd存储块
- kubernetes1.13.1集群结合ceph rbd部署最新版本jenkins
简介
jenkins-kubernetes-plugin
Jenkins plugin to run dynamic agents in a Kubernetes cluster.
Based on the Scaling Docker with Kubernetes article, automates the scaling of Jenkins agents running in Kubernetes.
The plugin creates a Kubernetes Pod for each agent started, defined by the Docker image to run, and stops it after each build.
Agents are launched using JNLP, so it is expected that the image connects automatically to the Jenkins master. For that some environment variables are automatically injected:
- JENKINS_URL: Jenkins web interface url
- JENKINS_SECRET: the secret key for authentication
- JENKINS_AGENT_NAME: the name of the Jenkins agent
- JENKINS_NAME: the name of the Jenkins agent (Deprecated. Only here for backwards compatibility)
基本环境
k81集群1.13.1版本
[root@elasticsearch01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.2.8.34 Ready 25d v1.13.1
10.2.8.65 Ready 25d v1.13.1 ceph集群 luminous版本
[root@ceph01 ~]# ceph -s
services:
mon: 3 daemons, quorum ceph01,ceph02,ceph03
mgr: ceph03(active), standbys: ceph02, ceph01
osd: 24 osds: 24 up, 24 in
rgw: 3 daemons active操作步骤
一、使用ceph rbd创建pv、pvc
官网使用的是自带创建pv与pvc这里使用的是手动创建
1、创建pv
[root@elasticsearch01 jenkins]# cat jenkins-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: jenkins-home-pv
spec:
capacity:
storage: 40Gi
accessModes:
- ReadWriteOnce
rbd:
monitors:
- '10.0.4.10:6789'
- '10.0.4.13:6789'
- '10.0.4.15:6789'
pool: rbd-k8s
image: cephimage3
user: admin
secretRef:
name: ceph-secret
fsType: ext4
readOnly: false
persistentVolumeReclaimPolicy: Recycle
[root@elasticsearch01 jenkins]# kubectl create -f jenkins-pv.yaml
persistentvolume/jenkins-home-pv created
[root@elasticsearch01 jenkins]# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
ceph-rbd-pv 20Gi RWO Recycle Bound default/ceph-rbd-pv-claim 22h
jenkins-home-pv 40Gi RWO Recycle Available 4s2、创建pvc
[root@elasticsearch01 jenkins]# cat jenkins-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: jenkins-home-pvc
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 20Gi
[root@elasticsearch01 jenkins]# kubectl create -f jenkins-pvc.yaml
persistentvolumeclaim/jenkins-home-pvc created
[root@elasticsearch01 jenkins]# kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
ceph-rbd-pv-claim Bound ceph-rbd-pv 20Gi RWO 22h
jenkins-home-pvc Bound jenkins-home-pv 40Gi RWO 3s
[root@elasticsearch01 jenkins]# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
ceph-rbd-pv 20Gi RWO Recycle Bound default/ceph-rbd-pv-claim 22h
jenkins-home-pv 40Gi RWO Recycle Bound default/jenkins-home-pvc 77s二、跟进实际情况修改jenkins.yml文件
主要修改的配置从上到下分别是：
1、拉取镜像策略
imagePullPolicy: IfNotPresent2、自动存储storage class改成voulumes的pvc方式实现
volumes:
- name: jenkins-home
persistentVolumeClaim:
claimName: jenkins-home-pvc3、ingress的host改成实际的
host: jenkins.minminmsn.com4、ingres的tls证书改成实际的
tls:
- hosts:
- jenkins.minminmsn.com
secretName: ingress-secret5、具体如下
[root@elasticsearch01 jenkins]# cat jenkins.yml
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: jenkins
labels:
name: jenkins
spec:
serviceName: jenkins
replicas: 1
updateStrategy:
type: RollingUpdate
template:
metadata:
name: jenkins
labels:
name: jenkins
spec:
terminationGracePeriodSeconds: 10
serviceAccountName: jenkins
containers:
- name: jenkins
image: jenkins/jenkins:lts-alpine
imagePullPolicy: IfNotPresent
ports:
- containerPort: 8080
- containerPort: 50000
resources:
limits:
cpu: 1
memory: 1Gi
requests:
cpu: 0.5
memory: 500Mi
env:
- name: LIMITS_MEMORY
valueFrom:
resourceFieldRef:
resource: limits.memory
divisor: 1Mi
- name: JAVA_OPTS
# value: -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -XX:MaxRAMFraction=1 -XshowSettings:vm -Dhudson.slaves.NodeProvisioner.initialDelay=0 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85
value: -Xmx$(LIMITS_MEMORY)m -XshowSettings:vm -Dhudson.slaves.NodeProvisioner.initialDelay=0 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85
volumeMounts:
- name: jenkins-home
mountPath: /var/jenkins_home
readOnly: false
livenessProbe:
httpGet:
path: /login
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 5
failureThreshold: 12 # ~2 minutes
readinessProbe:
httpGet:
path: /login
port: 8080
initialDelaySeconds: 60
timeoutSeconds: 5
failureThreshold: 12 # ~2 minutes
securityContext:
fsGroup: 1000
volumes:
- name: jenkins-home
persistentVolumeClaim:
claimName: jenkins-home-pvc
---
apiVersion: v1
kind: Service
metadata:
name: jenkins
spec:
# type: LoadBalancer
selector:
name: jenkins
# ensure the client ip is propagated to avoid the invalid crumb issue when using LoadBalancer (k8s >=1.7)
#externalTrafficPolicy: Local
ports:
-
name: http
port: 80
targetPort: 8080
protocol: TCP
-
name: agent
port: 50000
protocol: TCP
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: jenkins
annotations:
nginx.ingress.kubernetes.io/ssl-redirect: "true"
kubernetes.io/tls-acme: "true"
# "413 Request Entity Too Large" uploading plugins, increase client_max_body_size
nginx.ingress.kubernetes.io/proxy-body-size: 50m
nginx.ingress.kubernetes.io/proxy-request-buffering: "off"
# For nginx-ingress controller < 0.9.0.beta-18
ingress.kubernetes.io/ssl-redirect: "true"
# "413 Request Entity Too Large" uploading plugins, increase client_max_body_size
ingress.kubernetes.io/proxy-body-size: 50m
ingress.kubernetes.io/proxy-request-buffering: "off"
spec:
rules:
- http:
paths:
- path: /
backend:
serviceName: jenkins
servicePort: 80
host: jenkins.minminmsn.com
tls:
- hosts:
- jenkins.minminmsn.com
secretName: ingress-secret三、创建状态集、svc、pod、ingress
1、创建rbac认证角色
[root@elasticsearch01 jenkins]# kubectl create -f service-account.yml
serviceaccount/jenkins created
role.rbac.authorization.k8s.io/jenkins created
rolebinding.rbac.authorization.k8s.io/jenkins created2、创建jenkins服务等
[root@elasticsearch01 jenkins]# kubectl create -f jenkins.yml
statefulset.apps/jenkins created
service/jenkins created
ingress.extensions/jenkins created 4s
[root@elasticsearch01 jenkins]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 454 18d
ceph-rbd-pv-pod1 1/1 Running 1 21h
jenkins-0 0/1 ContainerCreating 0 7s
[root@elasticsearch01 jenkins]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 454 18d
ceph-rbd-pv-pod1 1/1 Running 1 21h
jenkins-0 1/1 Running 0 4m52s四、通过ingress访问
获取ingress-nginx对外端口，https://jenkins.minminmsn.com:47215/访问即可，需要配置dns解析到pod所在node的ip
[root@elasticsearch01 jenkins]# kubectl get svc -n ingress-nginx|grep ingress-nginx
ingress-nginx LoadBalancer 10.254.125.151 80:33003/TCP,443:47215/TCP 14d 五、初始化jenkins
1、查找密码
[root@elasticsearch02 ~]# df -h|grep rbd
/dev/rbd0 493G 163G 306G 35% /data
/dev/rbd1 20G 45M 20G 1% /var/lib/kubelet/plugins/kubernetes.io/rbd/mounts/rbd-k8s-image-cephimage2
/dev/rbd2 40G 138M 40G 1% /var/lib/kubelet/plugins/kubernetes.io/rbd/mounts/rbd-k8s-image-cephimage3
[root@elasticsearch02 ~]# cd //var/lib/kubelet/plugins/kubernetes.io/rbd/mounts/rbd-k8s-image-cephimage3
[root@elasticsearch02 rbd-k8s-image-cephimage3]# ls
config.xml init.groovy.d jobs nodes secrets war
copy_reference_file.log jenkins.CLI.xml logs plugins updates
hudson.model.UpdateCenter.xml jenkins.install.UpgradeWizard.state lost+found secret.key userContent
identity.key.enc jenkins.telemetry.Correlator.xml nodeMonitors.xml secret.key.not-so-secret users
[root@elasticsearch02 rbd-k8s-image-cephimage3]# cat secrets/initialAdminPassword
92c145b796cc48b0af8b5ef0f7afce28
2、选择安装插件
3、创建初始管理账号
4、设置jenkins url默认https://jenkins.minminmsn.com:47215/
5、开始使用jenkins
6、jenkins控制台界面，主要配置都在系统管理中
总结
使用ceph rbd 这种只能读写一次的设备不能用在线上，线上应该使用分布式存储例如nfs，cephfs，glusterfs等，这里只是测试jenkins结合ceph，pv，pvc完成有状态pod的测试