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Recoveries

What is Recovery

A Recovery is a Kubernetes CustomResourceDefinition (CRD). It provides configuration for restoring a backup taken using Stash. You only need to specify the Restic that was used for taking backup, the target workload and volume where backup will be restored.

Recovery Spec

As with all other Kubernetes objects, a Recovery needs apiVersion, kind, and metadata fields. It also needs a .spec section. Below is an example Recovery object.

apiVersion: stash.appscode.com/v1alpha1
kind: Recovery
metadata:
  name: stash-demo
  namespace: default
spec:
  workload:
    kind: Deployment
    name: stash-demo
  backend:
    local:
      mountPath: /safe/data
      hostPath:
        path: /data/stash-test/restic-repo
    storageSecretName: stash-demo
  paths:
  - /source/data
  recoveredVolumes:
  - mountPath: /source/data
    hostPath:
      path: /data/stash-test/restic-restored

The .spec section has following parts:

spec.workload

spec.workload specifies a target workload that was backed up using Restic. A single Restic backups all types of workloads that matches the label-selector, but you can only restore a specific workload using a Recovery.

spec.podOrdinal

For workload kind Statefulset, you need to specify pod index using spec.podOrdinal. You must not specify it for other workload kinds. For example:

apiVersion: stash.appscode.com/v1alpha1
kind: Recovery
metadata:
  name: statefulset-demo
  namespace: default
spec:
  workload:
    kind: Statefulset
    name: statefulset-demo
  podOrdinal: 0
  backend:
    local:
      mountPath: /safe/data
      hostPath:
        path: /data/stash-test/restic-repo
    storageSecretName: stash-demo
  paths:
  - /source/data
  recoveredVolumes:
  - mountPath: /source/data
    hostPath:
      path: /data/stash-test/restic-restored

spec.nodeName

For workload kind Daemonset, you need to specify node name using spec.nodeName. You must not specify it for other workload kinds. For example:

apiVersion: stash.appscode.com/v1alpha1
kind: Recovery
metadata:
  name: daemonset-demo
  namespace: default
spec:
  restic: daemonset-demo
  workload:
    kind: Daemonset
    name: daemonset-demo
  nodeName: minikube
  backend:
    local:
      mountPath: /safe/data
      hostPath:
        path: /data/stash-test/restic-repo
    storageSecretName: stash-demo
  paths:
  - /source/data
  recoveredVolumes:
  - mountPath: /source/data
    hostPath:
      path: /data/stash-test/restic-restored

spec.backend

Specifies the backend that was used in Restic to take backups. To learn how to configure various backends for Restic, please visit here.

spec.paths

Array of strings specifying the file-group paths that was backed up using Restic.

spec.recoveredVolumes

Indicates an array of volumes where snapshots will be recovered. Here, path specifies where the volume will be mounted. Note that, Recovery recovers data in the same paths from where backup was taken (specified in spec.paths). So, volumes must be mounted on those paths or their parent paths. Following parameters are available for recoveredVolumes.

Recovery Status

Stash operator updates .status of a Recovery CRD when recovery operation is completed.

• status.phase indicates the current phase of overall recovery process. Possible values are Pending, Running, Succeeded, Failed and Unknown.
• status.stats is a array status, each of which indicates the status for individual paths. Each element of the array has following fields:
  • status.stats[].path indicates a path that was backed up using Restic and is selected for recovery.
  • status.stats[].phase indicates the current phase of recovery process for the particular path. Possible values are Pending, Running, Succeeded, Failed and Unknown.
  • status.stats[].duration indicates the elapsed time to successfully restore backup for the particular path.

Next Steps

• Learn how to use Stash to backup a Kubernetes deployment here.
• Learn about the details of Restic CRD here.
• To restore a backup see here.
• To run backup in offline mode see here
• See the list of supported backends and how to configure them here.
• See working examples for supported workload types here.
• Thinking about monitoring your backup operations? Stash works out-of-the-box with Prometheus.
• Learn about how to configure RBAC roles.
• Learn about how to configure Stash operator as workload initializer here.
• Want to hack on Stash? Check our contribution guidelines.