SRE文档

深浅模式

1. 静态PV ​

此方式的特点,需要手动创建pvc,pv ,增加了维护成本

1.1 nfs服务端 ​

bash
#创建共享目录
[root@Rocky nfs]# mkdir -p /data/nfs/pv{01,02,03}

#配置
[root@Rocky nfs]# cat /etc/exports
/data/nfs/pv01 *(insecure,rw,sync,no_root_squash)
/data/nfs/pv02 *(insecure,rw,sync,no_root_squash)
/data/nfs/pv03 *(insecure,rw,sync,no_root_squash)

#热加载配置
[root@Rocky nfs]# showmount -e
Export list for Rocky:
/data/nfs/pv03 *
/data/nfs/pv02 *
/data/nfs/pv01 *
#创建共享目录
[root@Rocky nfs]# mkdir -p /data/nfs/pv{01,02,03}

#配置
[root@Rocky nfs]# cat /etc/exports
/data/nfs/pv01 *(insecure,rw,sync,no_root_squash)
/data/nfs/pv02 *(insecure,rw,sync,no_root_squash)
/data/nfs/pv03 *(insecure,rw,sync,no_root_squash)

#热加载配置
[root@Rocky nfs]# showmount -e
Export list for Rocky:
/data/nfs/pv03 *
/data/nfs/pv02 *
/data/nfs/pv01 *

1.2 创建pv和storageclass ​

yaml
[root@kube-master nfs]# cat 1.nfs-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-100m
spec:
  capacity:
    storage: 100Mi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv01
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-1g
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv02
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-2g
spec:
  capacity:
    storage: 2Gi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv03
[root@kube-master nfs]# cat 1.nfs-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-100m
spec:
  capacity:
    storage: 100Mi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv01
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-1g
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv02
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-2g
spec:
  capacity:
    storage: 2Gi
  accessModes:
    - ReadWriteMany
  storageClassName: "nfs-storage"
  nfs:
    server: 10.103.236.199
    path: /data/nfs/pv03
  • 查看
[root@kube-master nfs]# kubectl get pv
NAME      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM              STORAGECLASS   REASON   AGE
pv-100m   100Mi      RWX            Retain           Available                      nfs-storage             44m
pv-1g     1Gi        RWX            Retain           Available          nfs-storage             44m
pv-2g     2Gi        RWX            Retain           Available                      nfs-storage             44m
[root@kube-master nfs]# kubectl get pv
NAME      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM              STORAGECLASS   REASON   AGE
pv-100m   100Mi      RWX            Retain           Available                      nfs-storage             44m
pv-1g     1Gi        RWX            Retain           Available          nfs-storage             44m
pv-2g     2Gi        RWX            Retain           Available                      nfs-storage             44m

1.3 创建pvc ​

yaml
[root@kube-master nfs]# cat 2.nfs-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: caim-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 200Mi
  storageClassName: nfs-storage #pv 名字
[root@kube-master nfs]# cat 2.nfs-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: caim-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 200Mi
  storageClassName: nfs-storage #pv 名字
  • 查看pvc
bash
[root@kube-master nfs]# kubectl get pvc
NAME       STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
caim-pvc   Bound    pv-1g    1Gi        RWX            nfs-storage    47m
[root@kube-master nfs]# kubectl get pvc
NAME       STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
caim-pvc   Bound    pv-1g    1Gi        RWX            nfs-storage    47m

1.4 创建pod ​

yaml
[root@kube-master nfs]# cat 3.nfs-pod.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: pod-nfs-deployment
  labels:
    app: pod-nfs-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pod-nfs-app
  template:
    metadata:
      labels:
        app: pod-nfs-app
    spec:
      containers:
      - name: pod-nfs-container
        image: nginx:latest
        ports:
        - containerPort: 80
        volumeMounts:
        - name: pod-nfs-volume
          mountPath: /usr/share/nginx/html
[root@kube-master nfs]# cat 3.nfs-pod.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: pod-nfs-deployment
  labels:
    app: pod-nfs-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pod-nfs-app
  template:
    metadata:
      labels:
        app: pod-nfs-app
    spec:
      containers:
      - name: pod-nfs-container
        image: nginx:latest
        ports:
        - containerPort: 80
        volumeMounts:
        - name: pod-nfs-volume
          mountPath: /usr/share/nginx/html
  • 执行apply
bash
[root@kube-master nfs]# kubectl apply -f 3.nfs-pod.yaml
deployment.apps/pod-nfs-deployment created
[root@kube-master nfs]# kubectl apply -f 3.nfs-pod.yaml
deployment.apps/pod-nfs-deployment created
  • 查看pod
bash
[root@kube-master nfs]# kubectl get pod -owide
NAME                                   READY   STATUS    RESTARTS         AGE   IP              NODE          NOMINATED NODE   READINESS GATES
pod-nfs-deployment-5b5478668f-vxfks    1/1     Running   0                42m   172.30.0.176    kube-node01   <none>           <none>
[root@kube-master nfs]# kubectl get pod -owide
NAME                                   READY   STATUS    RESTARTS         AGE   IP              NODE          NOMINATED NODE   READINESS GATES
pod-nfs-deployment-5b5478668f-vxfks    1/1     Running   0                42m   172.30.0.176    kube-node01   <none>           <none>
  • 验证效果
bash
[root@kube-master nfs]# kubectl get pvc,pv
NAME                             STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
persistentvolumeclaim/caim-pvc   Bound    pv-1g    1Gi        RWX            nfs-storage    61m

NAME                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM              STORAGECLASS   REASON   AGE
persistentvolume/pv-100m   100Mi      RWX            Retain           Available                      nfs-storage             72m
persistentvolume/pv-1g     1Gi        RWX            Retain           Bound       default/caim-pvc   nfs-storage             72m
persistentvolume/pv-2g     2Gi        RWX            Retain           Available                      nfs-storage             72m
[root@kube-master nfs]# kubectl get pvc,pv
NAME                             STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
persistentvolumeclaim/caim-pvc   Bound    pv-1g    1Gi        RWX            nfs-storage    61m

NAME                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM              STORAGECLASS   REASON   AGE
persistentvolume/pv-100m   100Mi      RWX            Retain           Available                      nfs-storage             72m
persistentvolume/pv-1g     1Gi        RWX            Retain           Bound       default/caim-pvc   nfs-storage             72m
persistentvolume/pv-2g     2Gi        RWX            Retain           Available                      nfs-storage             72m
bash
[root@kube-master nfs]# curl 172.30.0.176
<html>
<head><title>403 Forbidden</title></head>
<body>
<center><h1>403 Forbidden</h1></center>
<hr><center>nginx/1.27.0</center>
</body>
</html>

#写入数据之后
[root@kube-master nfs]# curl 172.30.0.176
hello pv02
[root@kube-master nfs]# curl 172.30.0.176
<html>
<head><title>403 Forbidden</title></head>
<body>
<center><h1>403 Forbidden</h1></center>
<hr><center>nginx/1.27.0</center>
</body>
</html>

#写入数据之后
[root@kube-master nfs]# curl 172.30.0.176
hello pv02