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Multiple Pods Read Write Many

This example shows how to create a static provisioned EFS persistence volume (PV) and access it from multiple pods with RWX access mode.

Edit Persistent Volume

Edit persistent volume using sample spec:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: efs-pv
spec:
  capacity:
    storage: 5Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: efs-sc
  csi:
    driver: efs.csi.aws.com
    volumeHandle: [FileSystemId]

Replace volumeHandle value with FileSystemId of the EFS filesystem that needs to be mounted. Note that the access mode is RWX which means the PV can be read and written from multiple pods.

You can get FileSystemId using AWS CLI:

>> aws efs describe-file-systems --query "FileSystems[*].FileSystemId"

Deploy the Example Application

Create PV, persistence volume claim (PVC), storageclass and the pods that consume the PV:

kubectl apply -f examples/kubernetes/multiple_pods/specs/storageclass.yaml
kubectl apply -f examples/kubernetes/multiple_pods/specs/pv.yaml
kubectl apply -f examples/kubernetes/multiple_pods/specs/claim.yaml
kubectl apply -f examples/kubernetes/multiple_pods/specs/pod1.yaml
kubectl apply -f examples/kubernetes/multiple_pods/specs/pod2.yaml

In the example, both pod1 and pod2 are writing to the same EFS filesystem at the same time.

Check the Application uses EFS filesystem

After the objects are created, verify that pod is running:

>> kubectl get pods

Also verify that data is written onto EFS filesystem from both pods:

>> kubectl exec -ti app1 -- tail -f /data/out1.txt
>> kubectl exec -ti app2 -- tail -f /data/out2.txt