Mounting a volume in block mode

To mount a volume in volumeMode: Block mode:

1. Create a PersistentVolumeClaim.
2. Create a pod with the mounted volume.

Before you start, install kubectl and configure it to work with the created Managed Service for Kubernetes cluster.

Create a objectCreate a PersistentVolumeClaimobject

1. To create a volume in block mode, set the spec.volumeMode field value to Block.

   Save the following PersistentVolumeClaim creation specification to a YAML file named pvc-block.yaml.

   Note

   If the storageClassName parameter is not specified, the default storage class (yc-network-hdd) is used. To change the default class, see Change the default storage class.

   To learn more about the PersistentVolumeClaim creation specification, see the Kubernetes documentation.

   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: pvc-block
   spec:
     accessModes:
       - ReadWriteOnce
     volumeMode: Block
     storageClassName: "yc-network-hdd"
     resources:
       requests:
         storage: 1Gi
   

2. Create the PersistentVolumeClaim object:

   kubectl create -f pvc-block.yaml
   

   Result:

   persistentvolumeclaim/pvc-block created
   

Create a pod with the mounted volumeCreate a pod with the mounted volume

1. When creating a volume pod in block mode, specify the spec.containers.volumeDevices field.

   Save the following pod creation specification to a YAML file named pod.yaml.

   To learn more about the pod creation specification, see the Kubernetes documentation.

   apiVersion: v1
   kind: Pod
   metadata:
     name: pod
   spec:
     containers:
     - name: app
       image: ubuntu
       command: ["/bin/sh"]
       args: ["-xc", "/bin/dd if=/dev/block of=/dev/null bs=1K count=10; /bin/sleep 3600"]
       volumeDevices:
       - devicePath: /dev/block
         name: persistent-storage
     volumes:
     - name: persistent-storage
       persistentVolumeClaim:
         claimName: pvc-block
   

2. Run this command:

   kubectl create -f pod.yaml
   

   Result:

   pod/pod created