K8S pod挂载存储卷

1、hostpath方式

# hostpath挂载方式
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: grafana
  name: grafana
spec:
  selector:
    matchLabels:
      app: grafana
  template:
    metadata:
      labels:
        app: grafana
    spec:
      securityContext:
        fsGroup: 472
        supplementalGroups:
          - 0
      containers:
        - name: grafana
          image: grafana/grafana:8.4.0
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 3000
              name: http-grafana
              protocol: TCP
          readinessProbe:
            failureThreshold: 3
            httpGet:
              path: /robots.txt
              port: 3000
              scheme: HTTP
            initialDelaySeconds: 10
            periodSeconds: 30
            successThreshold: 1
            timeoutSeconds: 2
          livenessProbe:
            failureThreshold: 3
            initialDelaySeconds: 30
            periodSeconds: 10
            successThreshold: 1
            tcpSocket:
              port: 3000
            timeoutSeconds: 1
          resources:
            requests:
              cpu: 250m
              memory: 750Mi
          volumeMounts:
            - mountPath: /var/lib/grafana
              name: host-path
      volumes:
        - name: host-path
          hostPath:
            # directory location on host
            path: /opt/test-hostpath
            # this field is optional
            type: DirectoryOrCreate
---
apiVersion: v1
kind: Service
metadata:
  name: grafana
spec:
  ports:
    - port: 3000
      protocol: TCP
      targetPort: http-grafana
      nodePort: 30001            
  selector:
    app: grafana
  sessionAffinity: None
  type: NodePort

2、PV、PVC挂载方式

# 创建pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: grafana-pv
spec:
  capacity:
    storage: 1Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /opt/grafana
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - node2
# 创建pvc
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi 
  storageClassName: local-storage
  volumeName: grafana-pv
  volumeMode: Filesystem
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: grafana
  name: grafana
spec:
  selector:
    matchLabels:
      app: grafana
  template:
    metadata:
      labels:
        app: grafana
    spec:
      securityContext:
        fsGroup: 472
        supplementalGroups:
          - 0
      containers:
        - name: grafana
          image: grafana/grafana:latest
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 3000
              name: http-grafana
              protocol: TCP
          readinessProbe:
            failureThreshold: 3
            httpGet:
              path: /robots.txt
              port: 3000
              scheme: HTTP
            initialDelaySeconds: 10
            periodSeconds: 30
            successThreshold: 1
            timeoutSeconds: 2
          livenessProbe:
            failureThreshold: 3
            initialDelaySeconds: 30
            periodSeconds: 10
            successThreshold: 1
            tcpSocket:
              port: 3000
            timeoutSeconds: 1
          resources:
            requests:
              cpu: 250m
              memory: 750Mi
          volumeMounts:
            - mountPath: /var/lib/grafana
              name: grafana-pv
      volumes:
        - name: grafana-pv
          persistentVolumeClaim:
            claimName: grafana-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: grafana
spec:
  ports:
    - port: 3000
      protocol: TCP
      targetPort: http-grafana
  selector:
    app: grafana
  sessionAffinity: None
  type: NodePort

kubectl get pv,pvc,pod -A -o wide     # 查看pv，pvc
kubectl get svc -o wide    # 查看service

参考链接：
       https://www.zhihu.com/tardis/bd/art/447760895     # k8s nfs网络共享存储
       https://www.cnblogs.com/liugp/p/16622532.html     # k8s本地存储卷介绍与简单使用(emptyDir，hostPath，local volume)
       https://blog.csdn.net/weixin_45310323/article/details/131154956     # k8s持久化存储PV、PVC详解
       https://blog.csdn.net/weixin_45310323/article/details/131154887     # k8s存储方案(emptyDir，hostPath，nfs网络共享存储)
       https://kubernetes.io/zh-cn/docs/concepts/storage/volumes/
       https://mp.weixin.qq.com/s/ZGJjz8IRkZvqRFlO84TT7w      # 完全解读NFS