K8s之deploy挂载Volumes

一. 创建Host类型pv

1.1 创建pv yaml文件

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

本地挂载目录路径: `/data/static` 数据将会持久化到该路径下面

1.2 kubectl创建pv

-bash-4.2# kubectl create namespace iam #### 创建namespace做资源隔离
-bash-4.2# kubectl create -f iam_pv.yaml -n iam
rsistentvolume/myvolume created
-bash-4.2# kubectl get pv -n iam
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
myvolume 5Gi RWO,RWX Retain Available normal 4s
-bash-4.2# 

二、创建pvc

2.1 创建pvc yaml文件

-bash-4.2# vim iam_pvc.yaml

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

2.2 kubectl创建pvc

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

当`STATUS`状态为`Bound`说明`pvc`已经绑定到`pv`上，到这里已完成初步的`pvc`、`pv`的绑定

三、创建deploy yaml文件

3.1 挂载pvc

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

3.2 kubectl创建deploy

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

3.3 检查是否挂载成功

a. 进入port检查

-bash-4.2# kubectl -n iam exec -it iam-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. 创建一个文件

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

c. 检查持久化

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

完成调试。