Scheduled Snapshot¶

This article introduces how to create snapshots for VMs on a schedule.

You can create scheduled snapshots for VMs, providing continuous protection for data and ensuring effective data recovery in case of data loss, corruption, or deletion.

Steps¶

1. In the left navigation bar, click Container Management -> Clusters to select the proper cluster where the target VM is located. After entering the cluster, click Workloads -> CronJobs, and choose Create from YAML to create a scheduled task. Refer to the following YAML example to create snapshots for the specified VM on a schedule.

   

   Click to view the YAML example for creating a scheduled task

   apiVersion: batch/v1
   kind: CronJob
   metadata:
     name: xxxxx-xxxxx-cronjob # Scheduled task name (Customizable)
     namespace: virtnest-system # Do not modify the namespace
   spec:
     schedule: "5 * * * *" # Modify the scheduled task execution interval as needed
     concurrencyPolicy: Allow
     suspend: false
     successfulJobsHistoryLimit: 10
     failedJobsHistoryLimit: 3
     startingDeadlineSeconds: 60
     jobTemplate:
       spec:
         template:
           metadata:
             labels:
               virtnest.io/vm: xxxx # Modify to the name of the VM that needs to be snapshotted
               virtnest.io/namespace: xxxx # Modify to the namespace where the VM is located
           spec:
             serviceAccountName: kubevirt-operator
             containers:
               - name: snapshot-job
                 image: release.daocloud.io/virtnest/tools:v0.1.5 # For offline environments, modify the registry address to the proper registry address of the cluster
                 imagePullPolicy: IfNotPresent
                 env:
                   - name: NS
                     valueFrom:
                       fieldRef:
                         fieldPath: metadata.labels['virtnest.io/namespace']
                   - name: VM
                     valueFrom:
                       fieldRef:
                         fieldPath: metadata.labels['virtnest.io/vm']
                 command:
                   - /bin/sh
                   - -c
                   - |
                     export SUFFIX=$(date +"%Y%m%d-%H%M%S")
                     cat <<EOF | kubectl apply -f -
                     apiVersion: snapshot.kubevirt.io/v1alpha1
                     kind: VirtualMachineSnapshot
                     metadata:
                       name: $(VM)-snapshot-$SUFFIX
                       namespace: $(NS)
                     spec:
                       source:
                         apiGroup: kubevirt.io
                         kind: VirtualMachine
                         name: $(VM)
                     EOF
             restartPolicy: OnFailure
   

2. After creating the scheduled task and running it successfully, you can click Virtual Machines in the list page to select the target VM. After entering the details, you can view the snapshot list.

   

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