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doc/operator: update formatting for backup section, add FAQ section (#3416)
* doc/operator: update formatting for backup section, add FAQ section * doc/operator: address review feedback * doc/operator: add note about difference between `VMRestore` and `VMBackupmanager` as init containers * Update docs/operator/backups.MD Co-authored-by: Roman Khavronenko <roman@victoriametrics.com> Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>
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Zakhar Bessarab
Aliaksandr Valialkin
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docs/operator/FAQ.md
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docs/operator/FAQ.md
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---
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sort: 15
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---
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# FAQ
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## How to change VMStorage PVC storage class
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With Helm chart deployment:
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1. Update the PVCs manually
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2. Run `kubectl delete statefulset --cascade=orphan {vmstorage-sts}` which will delete the sts but keep the pods
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3. Update helm chart with the new storage class in the volumeClaimTemplate
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4. Run the helm chart to recreate the sts with the updated value
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With Operator deployment:
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1. Update the PVCs manually
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2. Run `kubectl delete vmcluster --cascade=orphan {cluster-name}`
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3. Run `kubectl delete statefulset --cascade=orphan {vmstorage-sts}`
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4. Update VMCluster spec to use new storage class
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5. Apply cluster configuration
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@ -6,18 +6,21 @@ sort: 5
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## vmbackupmanager
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## vmbackupmanager is proprietary software.
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You can check vmbackupmanager [documentation](https://docs.victoriametrics.com/vmbackupmanager.html). It contains a description of the service and its features. This documentation covers vmbackumanager integration in vmoperator
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Before using it, you must have signed contract and accept EULA https://victoriametrics.com/assets/VM_EULA.pdf
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### vmbackupmanager is a part of VictoriaMetrics Enterprise offer
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*Before using it, you must have signed contract and accept EULA https://victoriametrics.com/assets/VM_EULA.pdf*
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## Usage examples
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`VMSingle` and `VMCluster` has built-in backup configuration, it uses `vmbackupmanager` - proprietary tool for backups.
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It supports incremental backups (hours, daily, etc) with popular object storages (aws s3, google cloud storage).
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`VMSingle` and `VMCluster` has built-in backup configuration, it uses `vmbackupmanager` - proprietary tool for backups.
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It supports incremental backups (hourly, daily, weekly, monthly) with popular object storages (aws s3, google cloud storage).
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You can enable it with the simple configuration, define secret
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The configuration example is the following:
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```yaml
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```yaml
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---
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apiVersion: v1
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kind: Secret
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@ -63,46 +66,45 @@ spec:
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credentialsSecret:
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name: remote-storage-keys
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key: credentials
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```
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NOTE: for cluster version operator adds suffix for `destination: "s3://your_bucket/folder"`, it becomes `"s3://your_bucket/folder/$(POD_NAME)"`.
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NOTE: for cluster version operator adds suffix for destination: `"s3://your_bucket/folder"`, it becomes `"s3://your_bucket/folder/$(POD_NAME)"`.
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It's needed to make consistent backups for each storage node.
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You can read more about backup configuration options and mechanics [here](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/app/vmbackup)
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You can read more about backup configuration options and mechanics [here](https://docs.victoriametrics.com/vmbackup.html)
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Possible configuration options for backup crd can be found at [link](https://docs.victoriametrics.com/operator/api.html#vmbackup)
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Possible configuration options for backup crd can be found at [link](https://docs.victoriametrics.com/operator/api.html#vmbackup)
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## Restoring backups
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There are several ways to restore with [vmrestore](https://docs.victoriametrics.com/vmrestore.html) or [vmbackupmanager](https://docs.victoriametrics.com/vmbackupmanager.html).
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It can be done with [vmrestore](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/app/vmrestore)
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There two ways:
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### Manually mounting disk
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You have to stop `VMSingle` by scaling it replicas to zero and manually restore data to the database directory.
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First:
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You have to stop `VMSingle` by scaling it replicas to zero and manually restore data to the database directory.
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Steps:
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1. edit `VMSingle` CRD, set replicaCount: 0
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2. wait until database stops
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3. ssh to some server, where you can mount `VMSingle` disk and mount it manually
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4. restore files with `vmrestore`
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5. umount disk
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6. edit `VMSingle` CRD, set replicaCount: 1
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7. wait database start
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Steps:
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1) edit `VMSingle` CRD, set replicaCount: 0
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2) wait until database stops
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3) ssh to some server, where you can mount `VMSingle` disk and mount it manually
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4) restore files with `vmrestore`
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5) umount disk
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6) edit `VMSingle` CRD, set replicaCount: 1
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7) wait database start
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### Using VMRestore init container
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Second:
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1. add init container with vmrestore command to `VMSingle` CRD, example:
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1) add init container with vmrestore command to `VMSingle` CRD, example:
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```yaml
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apiVersion: operator.victoriametrics.com/v1beta1
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kind: VMSingle
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metadata:
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```yaml
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apiVersion: operator.victoriametrics.com/v1beta1
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kind: VMSingle
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metadata:
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name: vmsingle-restored
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namespace: monitoring-system
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spec:
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spec:
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initContainers:
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- name: vmrestore
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image: victoriametrics/vmrestore:latest
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@ -125,12 +127,21 @@ spec:
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runOnStart: "true"
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image:
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repository: victoriametrics/vmbackupmanager
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tag: v1.67.0-enterprise
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tag: v1.83.0-enterprise
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credentialsSecret:
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name: remote-storage-keys
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key: credentials
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```
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2. apply it, and db will be restored from s3
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```
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2) apply it, and db will be restored from s3
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3. remove initContainers and apply crd.
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3) remove initContainers and apply crd.
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Note that using `VMRestore` will require adjusting `src` for each pod because restore will be handled per-pod.
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### Using VMBackupmanager init container
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Using VMBackupmanager restore in Kubernetes environment is described [here](https://docs.victoriametrics.com/vmbackupmanager.html#how-to-restore-in-kubernetes).
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Advantages of using `VMBackupmanager` include:
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- automatic adjustment of `src` for each pod when backup is requested
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- graceful handling of case when no restore is required - `VMBackupmanager` will exit with successful status code and won't prevent pod from starting
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