K8s之deploy掛載Volumes

一. 創建Host類型pv

1.1 創建pv yaml文件

-bash-4.2# cat  abc_mount_pvc.yaml                        
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: abc
  name: abc
spec:
  replicas: 3
  selector:
    matchLabels:
      app: abc
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: abc
    spec:
      containers:
      - image: registry.abc.com/abc/abc:1260cd6
        name: iam
        imagePullPolicy: Always
        resources: {}
        volumeMounts:
        - name: abcvolume
          mountPath: /data/static
      volumes:
      - name: abcvolume
        persistentVolumeClaim:
          claimName: mypvc
status: {}

本地掛載目錄路徑: `/data/static` 數據將會持久化到該路徑下面

1.2 kubectl創建pv

-bash-4.2# kubectl create namespace abc#### 創建namespace做資源隔離
-bash-4.2# kubectl create -f abc_pv.yaml -n abc
rsistentvolume/myvolume created
-bash-4.2# kubectl get pv -n abc
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
myvolume 5Gi RWO,RWX Retain Available normal 4s
-bash-4.2# 

二、創建pvc

2.1 創建pvc yaml文件

-bash-4.2# vim abc_pvc.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mypvc
spec:
  storageClassName: normal
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

2.2 kubectl創建pvc

-bash-4.2# kubectl create -f abc_pvc.yaml -n abc 
persistentvolumeclaim/mypvc created
-bash-4.2# kubectl get pvc -n abc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
mypvc Bound myvolume 5Gi RWO,RWX normal 6s
-bash-4.2# 
-bash-4.2# kubectl get pv -n abc 
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
myvolume 5Gi RWO,RWX Retain Bound iam/mypvc normal 73s
-bash-4.2# 

當`STATUS`狀態為`Bound`說明`pvc`已經綁定到`pv`上，到這里已完成初步的`pvc`、`pv`的綁定

三、創建deploy yaml文件

3.1 掛載pvc

-bash-4.2# cat  abc_mount_pvc.yaml                        
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: abc
  name: abc
spec:
  replicas: 3
  selector:
    matchLabels:
      app: abc
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: abc
    spec:
      containers:
      - image: registry.abc.com/abc/abc:1260cd6
        name: abc
        imagePullPolicy: Always
        resources: {}
        volumeMounts:
        - name: abcvolume
          mountPath: /data/static
      volumes:
      - name: abcvolume
        persistentVolumeClaim:
          claimName: mypvc
status: {}
-bash-4.2# 

3.2 kubectl創建deploy

-bash-4.2# kubectl create -f abc_mount_pvc.yaml -n abc
deployment.apps/iam created
-bash-4.2# 
-bash-4.2# 
-bash-4.2# kubectl get po -n abc
NAME READY STATUS RESTARTS AGE
abc-666475bcf9-gxgfb 1/1 Running 0 8s
abc-666475bcf9-lcljd 1/1 Running 0 8s
abc-666475bcf9-t6tbv 1/1 Running 0 8s
-bash-4.2# 

3.3 檢查是否掛載成功

a. 進入port檢查

-bash-4.2# kubectl -n abc exec -it abc-666475bcf9-t6tbv -- /bin/sh              
~/iam # ls
AUTHORS                api-ref                doc                    nohup.out              test-requirements.txt
ChangeLog              babel.cfg              docker                 requirements.txt       tools
Dockerfile             build                  etc                    setup                  tox.ini
LICENSE                build.sh               iam                    setup.cfg
README.rst             build_k8s.sh           iam.egg-info           setup.py
~/iam # 

b. 創建一個文件

~/iam # ls /data/static/
~/iam # cat /etc/passwd >/data/static/pwd.txt
~/iam # ls /data/static/
pwd.txt

c. 檢查持久化

-bash-4.2# ll /data/static/
total 8
-rw-r--r-- 1 root root 1230 Jul 19 22:44 pwd.txt

完成調試。