Kubernetes 1.11.2使用NFS作为共享存储

Kubernetes Master: 192.168.0.210
Kubernetes Node: 192.168.0.211
Kubernetes Node: 192.168.0.212

本地我们使用NFS作为Nginx的网站目录，使所有的pod共享一套代码

1.NFS服务器搭建

yum -y install nfs-utils

创建共享目录
mkdir -p /data/nfs

修改配置文件
vim /etc/exports
/data/nfs 192.168.0.0/24(rw,no_root_squash,no_all_squash,sync)

配置选项说明:
/data/nfs ?需要共享出去的目录
192.168.0.0/24 ?只有192.168.0.0网段的机器可以访问这个NFS服务
rw ??所有客户机可写
sync 说明所有写入会同时写入硬盘和内存，async就说明会先暂存于内存中，然后写入硬盘
no_root_squash 如果登录的用户是root的话，那么他就具有root的权限
no_all_squash ?与no_root_squash相识，如果登录的是user用户，那么也是user权限

systemctl start nfssystemctl enable nfs

在192.168.0.210挂载测试
mkdir -p /tmp/nfs
mount -t nfs 192.168.0.252:/data/nfs /mnt/nfs

mount: wrong fs type, bad option, bad superblock on 192.168.0.252:/data/nfs,
missing codepage or helper program, or other error
(for several filesystems (e.g. nfs, cifs) you might
need a /sbin/mount.<type> helper program)

 ??In some cases useful info is found in syslog - try

如果提示这个说明机器没有安装yum -y install nfs-utils
注意：所有kubernetes机器都需要安装nfs-utils

2.kubernetes创建PV

apiVersion: v1kind: PersistentVolumemetadata: ?name: nfs-pv ?labels: ???pv: nfs-pvspec: ?capacity: ???storage: 10Gi ?accessModes: ???- ReadWriteMany ?persistentVolumeReclaimPolicy: Retain ?nfs: ???path: /data/nfs ???server: 192.168.0.252

kubernetes创建PVC

kind: PersistentVolumeClaimapiVersion: v1metadata: ?name: nfs-pvcspec: ?accessModes: ???- ReadWriteMany ?resources: ???requests: ?????storage: 10Gi ?selector: ???matchLabels: ?????pv: nfs-pv

kubernetes创建deployment

apiVersion: extensions/v1beta1kind: Deploymentmetadata: ?name: nginx-testspec: ?replicas: 3 ?selector: ???matchLabels: ?????name: nginx-test ?template: ???metadata: ?????labels: ???????name: nginx-test ???spec: ?????containers: ?????- name: nginx-test ???????image: nginx ???????volumeMounts: ???????- mountPath: /usr/share/nginx/html ?????????name: nginx-data ???????ports: ???????- containerPort: 80 ?????volumes: ?????- name: nginx-data ???????persistentVolumeClaim: ?????????claimName: nfs-pvc

创建kubernetes的service

apiVersion: v1kind: Servicemetadata: ?name: nginx-test ?labels: ???name: nginx-testspec: ?type: NodePort ?ports: ?- port: 80 ???protocol: TCP ???targetPort: 80 ???name: http ???nodePort: 30008 ?selector: ???name: nginx-test

因为上面我们已经在192.168.0.210上将nfs挂载到/mnt/nfs目录了，进入目录
echo "hello,nfs for kubernetes">/tmp/nfs/index.html

打开http://192.168.0.210:30008/就显示
hello,nfs for kubernetes

Kubernetes 1.11.2使用NFS作为共享存储

原文地址：http://blog.51cto.com/fengwan/2176889