Using a Persistent Volume
On Compute Cloud@Customer, to use this persistent storage, create a Kubernetes deployment and assign a persistent volume claim as shown in the following sections.
Using Block Volume Storage
The following example uses block volume storage:
$ kubectl create -f nginx-deploy.yamlThe following output is the content of the nginx-deploy.yaml file.
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-bv-deployment
spec:
replicas: 3
selector:
matchLabels:
app: nginx-bv
template:
metadata:
labels:
app: nginx-bv
spec:
containers:
- name: nginx
image: available_internal_registry/nginx:latest
volumeMounts:
- mountPath: /usr/share/nginx/
name: data
ports:
- containerPort: 80
name: http
protocol: TCP
volumes:
- name: data
persistentVolumeClaim:
claimName: mynginxclaimUsing File System Storage
The following example uses file system storage:
$ kubectl create -f nginx-deploy.yamlThe following output is the content of the nginx-deploy.yaml file.
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-fss-deployment
spec:
replicas: 3
selector:
matchLabels:
app: nginx-fss
template:
metadata:
labels:
app: nginx-fss
spec:
containers:
- name: nginx
image: nginx:latest
volumeMounts:
- mountPath: /usr/share/nginx/
name: data
ports:
- containerPort: 80
name: http
protocol: TCP
volumes:
- name: data
persistentVolumeClaim:
claimName: fss-pvcVerify the New Storage Asset
Use the get pod subcommand to show the names of the replicas in the
pod:
$ kubectl get pod
nginx-deployment-55ff88b668-2k8rt 1/1 Running 0 4m54s
nginx-deployment-55ff88b668-79c2t 1/1 Running 0 4m54s
nginx-deployment-55ff88b668-qpdfd 1/1 Running 0 4m54sLog in to the pod and use the Linux df command to show that the application
replicas are using the persistentVolumeClaim storage. The
Filesystem column in the df output shows the mount
target IP address and the file system export path.
$ kubectl exec -it nginx-deployment-55ff88b668-2k8rt -- df -h /usr/share/nginx/html
Filesystem Size Used Avail Use% Mounted on
xxx.xx.xxx.xxx:/export/4fsderwh09ufyf84ei1lh3q2x8ou86pq5vcbx3aeeo060xxxxxxxxxxxxxxx 67T 0 67T 0% /usr/share/nginx/html