安装

#所有机器安装
yum install -y nfs-utils

ren

#nfs主节点
echo "/nfs/data/ *(insecure,rw,sync,no_root_squash)" > /etc/exports
mkdir -p /nfs/data
systemctl enable rpcbind --now
systemctl enable nfs-server --now
#配置生效
exportfs -r
#查询
exportfs

yan/bai

检查挂载点

showmount -e 1.15.230.38

创建对应目录

mkdir -p /nfs/data

挂载

mount -t nfs 1.15.230.38:/nfs/data /nfs/data

验证

echo "hello nfs server" > /nfs/data/test.txt

nginx挂载

ren

创建对应目录(否则会报错)

mkdir -p /nfs/data/nginx-pv

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx-pv-demo
  name: nginx-pv-demo
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx-pv-demo
  template:
    metadata:
      labels:
        app: nginx-pv-demo
    spec:
      containers:
      - image: nginx
        name: nginx
        volumeMounts:
        - name: html
          mountPath: /usr/share/nginx/html
      volumes:
        - name: html
          nfs:
            server: 1.15.230.38
            path: /nfs/data/nginx-pv

pv

创建pv

ren

创建相应目录

#nfs主节点
mkdir -p /nfs/data/01
mkdir -p /nfs/data/02
mkdir -p /nfs/data/03

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv01-10m
spec:
  capacity:
    storage: 10M
  accessModes:
    - ReadWriteMany
  storageClassName: nfs
  nfs:
    path: /nfs/data/01
    server: 1.15.230.38
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv02-1gi
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  storageClassName: nfs
  nfs:
    path: /nfs/data/02
    server: 1.15.230.38
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv03-3gi
spec:
  capacity:
    storage: 3Gi
  accessModes:
    - ReadWriteMany
  storageClassName: nfs
  nfs:
    path: /nfs/data/03
    server: 1.15.230.38

查询pv

kubectl get PersistentVolume
#或
kubectl get pv

pvc

创建pvc

ren

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nginx-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 200Mi
  storageClassName: nfs

查询pvnc

kubectl get pvc

pod绑定pvc

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx-deploy-pvc
  name: nginx-deploy-pvc
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx-deploy-pvc
  template:
    metadata:
      labels:
        app: nginx-deploy-pvc
    spec:
      containers:
      - image: nginx
        name: nginx
        volumeMounts:
        - name: html
          mountPath: /usr/share/nginx/html
      volumes:
        - name: html
          persistentVolumeClaim:
            claimName: nginx-pvc

ConfigMap

redis

echo 'appendonly yes
requirepass 123456789
' >> /root/redis.conf

创建配置集(configmap，简称cm)

# 创建配置，redis保存到k8s的etcd；
kubectl create cm redis-conf --from-file=/root/redis.conf

apiVersion: v1
data:  #data是所有真正的数据，key：默认是文件名   value：配置文件的内容
  redis.conf: |+
    appendonly yes
    requirepass 123456789
kind: ConfigMap
metadata:
  name: redis-conf
  namespace: default

查询配置集

#查询全部
kubectl get cm
#查询指定
kubectl get cm redis-conf -oyaml

创建之后就可以删除本地文件了，因为已经保存到etcd rm -rf /root/redis.conf

修改配置集

kubectl edit cm redis-conf

创建pod，引用配置集

apiVersion: v1
kind: Pod
metadata:
  name: redis
spec:
  containers:
  - name: redis
    image: redis
    command:
      - redis-server
      - "/redis-master/redis.conf"  #指的是redis容器内部的位置
    ports:
    - containerPort: 6379
    volumeMounts:
    - mountPath: /data
      name: data
    - mountPath: /redis-master
      name: config
  volumes:
    - name: data
      emptyDir: {}
    - name: config
      configMap:
        name: redis-conf
        items:
        - key: redis.conf
          path: redis.conf