k8s持久化存储之NFS

首先在集群之外安装服务端

nfs-server

centos

yum -y install nfs-utils rpcbind
mkdir -p /data/nfs #创建共享目录
chmod 0755 /data/nfs。#分配权限
echo "/data/nfs 192.168.100.0/22(rw,no_root_squash,no_all_squash,sync)" >> /etc/exports
exportfs -rv //使配置生效
systemctl enable rpcbind
systemctl enable nfs-server

#验证挂载
showmount -e localhost
#Export list for localhost:
#/data/nfs 192.168.100.0/22

debian

sudo apt update
sudo apt upgrade
sudo apt install nfs-kernel-server

nfs-client

所有节点安装nfs客户端!!⚠️

yum -y install nfs-utils
showmount -e 192.168.100.193
#Export list for 192.168.100.0:
#/data/nfs 192.168.100.0/22

debian

sudo apt update
sudo apt upgrade
sudo apt-get install -y nfs-common

K8S

直接使用

apiVersion: apps/v1  
kind: Deployment  
metadata:  
  name: nginx-deployment  
  labels:  
    app: nginx  
spec:  
  replicas: 3  
  selector:  
    matchLabels:  
      app: nginx  
  template:  
    metadata:  
      labels:  
        app: nginx  
    spec:  
      containers:  
      - name: nginx  
        image: nginx:1.14.2  
        ports:  
        - containerPort: 80  
        volumeMounts:  
        - name: data  
          mountPath: /usr/share/nginx/html  
      volumes:  
      - name: data  
        nfs:  
          path: /data/nfs  
          server: 192.168.100.201

helm

安装

helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner/
helm install -n kube-system nfs-client nfs-subdir-external-provisioner/nfs-subdir-external-provisioner \ --set nfs.server=192.168.100.201 \ --set nfs.path=/data/nfs \ --set storageClass.defaultClass=true
kubectl get sc

PVC

以bark-server为例

kind: Service  
apiVersion: v1  
metadata:  
  name: bark-server  
spec:  
  selector:  
    app: bark-server  
  type: NodePort  
  ports:  
    - name:  http  
      port:  8080  
      targetPort:  8080  
      nodePort: 30002  
---  
apiVersion: apps/v1  
kind: Deployment  
metadata:  
  name: bark-server  
spec:  
  replicas: 1  
  selector:  
    matchLabels:  
      app: bark-server  
  template:  
    metadata:  
      labels:  
        app: bark-server  
    spec:  
      containers:  
        - name: bark-server  
          image: finab/bark-server  
          resources:  
            limits:  
              memory: "128Mi"  
              cpu: "500m"  
          ports:  
            - containerPort: 8080  
          volumeMounts:  
            - mountPath: /data  
              name: bark-server  
      volumes:  
        - name: bark-server  
          persistentVolumeClaim:  
            claimName: bark-server  
#---  
#apiVersion: v1  
#kind: PersistentVolume  
#metadata:  
#  name: bark-server  
#spec:  
#  capacity:  
#    storage: 200G  
#  accessModes:  
#    - ReadWriteMany  
#  storageClassName: nfs-client  
#  nfs:  
#    server: 192.168.100.193  
#    path: /home/test  
---  
apiVersion: v1  
kind: PersistentVolumeClaim  
metadata:  
  name: bark-server  
spec:  
  accessModes: ["ReadWriteOnce"]  
  storageClassName: nfs-client  
  resources:  
    requests:  
      storage: 2Gi

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