[ dynamic volume 사용법 ]
1. pvc 에 storageclass 를 지정하여 pvc 만 생성하면 pv 가 다이너믹하게 생성되고 pvc 도 생성된다.
2. 이 때 rbd 이미지도 자동으로 생성된다.

$ vi jenkins-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins
  namespace: ci-infra
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  storageClassName: ceph




[ static volume 사용법 ]
1. rbd 이미지를 수동으로 생성해야 한다.
2. pv 에 storageclass 와 rbd 값을 모두 넣어야 한다.
    pv 에 pvc 에서 pv 를 selector 로 찾을 수 있게 label 값을 넣어야 한다.
    (keyring 값은 안넣어도 됨, storageclass의 secret 이용)
3. pvc 에 storageclass 와 selector 나 volumeName 둘 중에 하나를 사용하여 pv 와 연결한다.
    (storageclass 는 값은 없어도 됨.  없으면 default 인 storageclass 값을 활용함)


$ vi jenkins-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: jenkins
  labels:
    app: jenkins
spec:
  capacity:
    storage: 100Gi
  accessModes:
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: ceph
  rbd:
    image: jenkins
    monitors:
    - 192.168.30.23:6789
    - 192.168.30.24:6789
    - 192.168.30.25:6789
    pool: kubes
    secretRef:
      name: ceph-secret-user
    user: kube


$ vi jenkins-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins
  namespace: ci-infra
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  storageClassName: ceph
  selector:
    matchLabels:
      app: jenkins
# volumeName: jenkins


$ vi jenkins-deployment.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: jenkins
  namespace: ci-infra
  labels:
    app: jenkins
spec:
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: jenkins
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: cicd-services
                operator: In
                values:
                - enabled
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
      containers:
      - name: master
        env:
        - name: JENKINS_OPTS
          value: "--httpsPort=0 --http2Port=0"
        - name: JAVA_OPTS
          value: "-Xms8G -Xmx8G -XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent -XX:+ParallelRefProcEnabled -XX:+UseStringDeduplication -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:+UnlockDiagnosticVMOptions -XX:G1SummarizeRSetStatsPeriod=1 -Dorg.apache.commons.jelly.tags.fmt.timeZone=Asia/Seoul"
        image: jenkins/jenkins:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP
        - containerPort: 50000
          name: jnlp
          protocol: TCP
        readinessProbe:
          httpGet:
            path: /login
            port: 8080
          periodSeconds: 10
          timeoutSeconds: 5
          successThreshold: 2
          failureThreshold: 5
        volumeMounts:
        - mountPath: /var/jenkins_home
          name: jenkins
#        resources:
#          limits:
#            cpu: 4000m
#            memory: 8000Mi
#          requests:
#            cpu: 1000m
#            memory: 8000Mi
      volumes:
      - name: jenkins
        persistentVolumeClaim:
          claimName: jenkins




## 생성
$ rbd create kubes/jenkins -s 100G
$ kubectl create -f jenkins-pv.yaml
$ kubectl create -f jenkins-pvc.yaml

$ kubectl create -f jenkins-deployment.yaml 


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Posted by Kubernetes Korea co-leader seungkyua@gmail.com