Kubernetes部分Volume类型介绍及yaml示例--NFS（网络数据卷）

1. 说明
   nfs 卷允许将现有的 NFS（网络文件系统）共享挂载到你的容器中。不像 emptyDir，当删除 Pod 时，nfs 卷的内容被保留，卷仅仅是被卸载。这意味着 NFS 卷可以预填充数据，并且可以在 pod 之间“切换”数据。 NFS 可以被多个写入者同时挂载。
2. 部署NFS服务器
   关于NFS的部署，请参考NFS部署及优化（一）
3. 实战pod内的文件共享

   #创建yaml文件cat >> nginx_volume.yaml << EOFapiVersion: v1kind: Podmetadata: ???name: nginx-test ???namespace: test ???labels: ???????app: nginxspec: ???containers: ???- name: nginx ???????image: nginx:1.7.9 ???????ports: ???????- containerPort: 80 ???????volumeMounts: ???????#Mount the path to the container ???????- mountPath: "/tmp/" ???????????name: pv0003 ???volumes: ???- name: pv0003 ???????nfs: ?????????#fixed：This ip is the address of the nfs server ???????????server: 192.168.246.169 ???????????#fixed：This path is shared externally by the nfs server ???????????path: "/data"

   #启动nginx_volume.yamlkubectl create -f ./nginx_volume.yaml 

   #查看Pod运行状态kubectl get po -n testNAME ????????????????????????READY ????STATUS ???RESTARTS ??AGEnginx-test ??????????????????1/1 ??????Running ??0 ?????????29s

   #进入容器查看共享卷volumekubectl exec -it nginx-test ?/bin/bash --namespace=testroot@nginx-test:/# cd tmproot@nginx-test:/tmp# lslost+found ?sys##我们可以看到NFS服务器共享卷/data已经挂载进来了

4. 实战多个Pod内的容器间共享

   #创建deploymentcat >> deploy_volume.yaml << EOFapiVersion: extensions/v1beta1kind: Deploymentmetadata: ???name: nginx-wtf ???namespace: testspec: ???replicas: 2 ???template: ???????metadata: ???????????labels: ???????????????app: wtf ???????spec: ???????????containers: ???????????- name: nginx-wtf ???????????????image: nginx:1.7.9 ???????????????ports: ???????????????- containerPort: 81 ???????????????volumeMounts: ????????????????- name: pv0003 ????????????????????mountPath: /tmp/ ???????????volumes: ???????????- name: pv0003 ???????????????nfs: ???????????????????server: 192.168.246.169 ???????????????????path: "/data/"

   #启动deploymentkubectl create -f ./deploy_volume.yaml

   #查看Pods的运行状态NAME ????????????????????????READY ????STATUS ???RESTARTS ??AGEnginx-wtf-5774b87bdc-n97gr ??1/1 ??????Running ??0 ?????????32mnginx-wtf-5774b87bdc-xpsnr ??1/1 ??????Running ??0 ?????????32m

   #进入容器查看共享卷volumekubectl exec -it nginx-wtf-5774b87bdc-n97gr ?/bin/bash --namespace=testroot@nginx-wtf-5774b87bdc-n97gr:/# cd tmproot@nginx-wtf-5774b87bdc-n97gr:/tmp# lslost+found ?sys

5. 实战volume的操作

   #查看下当前命名空间运行有挂载NFS卷的Podskubectl get po -n testNAME ????????????????????????READY ????STATUS ???RESTARTS ??AGEnginx-test ??????????????????1/1 ??????Running ??0 ?????????2mnginx-wtf-5774b87bdc-n97gr ??1/1 ??????Running ??0 ?????????36mnginx-wtf-5774b87bdc-xpsnr ??1/1 ??????Running ??0 ?????????36m##在命名空间test里运行有三个Pods

   #在NFS服务端对共享卷进行操作##创建目录datagrandmkdir /data/datagrand

   #查看各Pod中容器内卷的变化##nginx-testkubectl exec -it nginx-test ?/bin/bash --namespace=testroot@nginx-test:/# cd tmproot@nginx-test:/tmp# lsdatagrand ?lost+found ?sys##nginx-wtf-5774b87bdc-n97grkubectl exec -it nginx-wtf-5774b87bdc-n97gr ?/bin/bash --namespace=testroot@nginx-wtf-5774b87bdc-n97gr:/# cd tmproot@nginx-wtf-5774b87bdc-n97gr:/tmp# lsdatagrand ?lost+found ?sys##nginx-wtf-5774b87bdc-xpsnrkubectl exec -it nginx-wtf-5774b87bdc-xpsnr ?/bin/bash --namespace=testroot@nginx-wtf-5774b87bdc-xpsnr:/# cd tmproot@nginx-wtf-5774b87bdc-xpsnr:/tmp# lsdatagrand ?lost+found ?sys##说明：我们可以看到各Pod中容器内卷已有datagrand

Kubernetes部分Volume类型介绍及yaml示例--NFS（网络数据卷）

原文地址：http://blog.51cto.com/wutengfei/2124840