Kubernetes : Use Persistent Storage

Kubernetes : Use Persistent Storage 2015/12/21

	It's necessary to use external storage if you'd like to use Persistent Data.
	For exmaple, Create a Pod with mounting external storage which is mapped with a directory for saving data on the Node Pod runs. The environment and Container image on this exmaple are the same with here.
[1]	Create a Pod on Admin Node.

[root@dlp ~]#  vi pod-webserver.yaml apiVersion: v1 kind: Pod metadata: name: httpd spec: containers: - name: httpd image: web_server ports: - containerPort: 80 volumeMounts: # the volume to use (it's the one defined in "volumes" section) - name: httpd-storage # mount point inside Container mountPath: /var/www/html volumes: # any name you like - name: httpd-storage hostPath: # the directory on Host Node for saving data path: /var/docker/disk01 [root@dlp ~]#  kubectl create -f pod-webserver.yaml  pods/httpd [root@dlp ~]#  kubectl get pods -o wide  NAME READY STATUS RESTARTS AGE NODE httpd 0/1 Running 0 8s node01 [root@dlp ~]#  kubectl get pod httpd -o yaml | grep "podIP"  podIP: 172.16.89.7

[2]	Move to a Node that Pod is running and make sure to work normally.

[root@node01 ~]#  echo "Persistent Storage" > /var/docker/disk01/index.html  [root@node01 ~]#  curl http://172.16.89.7/  Persistent Storage