tencent cloud

Introduction

Volume types

Notes on volumes

• After creating a volume, you need to set the mount target of the container in the "Containers in the Pod" module.
• Under the same service, the name of the volume and the set mount target must be unique.
• When the source path of a local disk volume is empty, the system will assign a temporary directory /var/lib/kubelet/pods/pod_name/volumes/kubernetes.io~empty-dir, and the lifecycle of the volume using the temporary directory is the same as the lifecycle of the Pod.
• If no permission is set for volume mount, the default setting will be read/write permission.

Operation Guide for Volumes in the Console

Creating a workload to mount a volume

1. Log in to the TKE console and select Clusters in the left sidebar.
2. On the Cluster Management page, click the ID of the cluster where you want to deploy a workload to go to the cluster management page.
3. Under Workload, select a workload type to go to the corresponding information page.
   For example, select Workload -> DaemonSet to go to the DaemonSet page as shown in the following figure:
   
4. Click Create to go to Create Workload page.
5. Set the workload name, namespace and other information as instructed. In Volume, click Add Volume.
6. Select a storage method for the volume. Use Tencent Cloud CBS is selected in this case.
7. Configure the mount point in Mount Target under Containers in the Pod, as shown in the following figure:
   You can configure the mount point only after selecting Add Volume in Step 5.
   
8. Set other options as needed and click Create Workload to finish the creation.

Configurations for mounting different volumes

This table shows the details of the use of different volumes. When you are creating a workload and have selected **Add Volume, you can refer to the following content to add the volume and set the mount point:

Using kubectl to Manipulate Volumes

The following is a sample where which you can perform creation by using kubectl directly.

Sample YAML for Mounting a Volume to a Pod

apiVersion: v1
kind: Pod
metadata:
 name: test-pd
spec:
 containers:
 - image: k8s.gcr.io/test-webserver
   name: test-container
   volumeMounts:
   - mountPath: /cache
     name: cache-volume
 volumes:
 - name: cache-volume
   emptyDir: {}

• spec.volumes: set the name, type, and parameters of the volume.
  • spec.volumes.emptyDir: set the temporary path
  • spec.volumes.hostPath: set the host path
  • spec.volumes.nfs: set the NFS disk
  • spec.volumes.persistentVolumeClaim: set the existing PersistentVolumeClaim.
• spec.volumeClaimTemplates: if this declaration is used, PersistentVolumeClaim and PersistentVolume will be automatically created based on the content of the declaration
• spec.containers.volumeMounts: enter the mount point of the volume.