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RestoreBatch is a Kubernetes
CustomResourceDefinition(CRD) which allows you to restore multiple co-related components( eg, workloads, databases, etc.) together that were backed up via a
Like any official Kubernetes resource, a
Status sections. A sample
RestoreBatch object to restore multiple co-related components is shown below:
apiVersion: stash.appscode.com/v1beta1 kind: RestoreBatch metadata: name: batch-restore namespace: demo spec: driver: Restic repository: name: minio-repo executionOrder: Parallel members: - target: alias: app ref: apiVersion: apps/v1 kind: Deployment name: wordpress rules: - paths: - /var/www/html volumeMounts: - mountPath: /var/www/html name: wordpress-persistent-storage - target: alias: db ref: apiVersion: appcatalog.appscode.com/v1alpha1 kind: AppBinding name: wordpress-mysql rules: - snapshots: - latest task: name: mysql-restore-8.0.14 status: phase: Succeeded sessionDuration: 15.145032437s conditions: - lastTransitionTime: "2020-07-25T17:41:52Z" message: Repository demo/minio-repo exist. reason: RepositoryAvailable status: "True" type: RepositoryFound - lastTransitionTime: "2020-07-25T17:41:52Z" message: Backend Secret demo/minio-secret exist. reason: BackendSecretAvailable status: "True" type: BackendSecretFound members: - conditions: - lastTransitionTime: "2020-07-25T17:41:52Z" message: Restore target apps/v1 deployment/wordpress found. reason: TargetAvailable status: "True" type: RestoreTargetFound - lastTransitionTime: "2020-07-25T17:41:52Z" message: Successfully injected stash init-container. reason: InitContainerInjectionSucceeded status: "True" type: StashInitContainerInjected phase: Succeeded ref: apiVersion: apps/v1 kind: Deployment name: wordpress stats: - duration: 822.861322ms hostname: app phase: Succeeded totalHosts: 1 - conditions: - lastTransitionTime: "2020-07-25T17:41:52Z" message: Restore target appcatalog.appscode.com/v1alpha1 appbinding/wordpress-mysql found. reason: TargetAvailable status: "True" type: RestoreTargetFound - lastTransitionTime: "2020-07-25T17:41:52Z" message: Successfully created restore job. reason: RestoreJobCreationSucceeded status: "True" type: RestoreJobCreated phase: Succeeded ref: apiVersion: appcatalog.appscode.com/v1alpha1 kind: AppBinding name: wordpress-mysql stats: - duration: 4.597812876s hostname: db phase: Succeeded totalHosts: 1
Here, we are going to describe the various sections of
RestoreBatch object has the following fields in the
spec.driver indicates the mechanism used to restore. Currently, Stash supports
VolumeSnapshotter as drivers. The default value of this field is
Restic. For more details, please see here.
spec.repository.name indicates the
Repository crd name that holds necessary backend information from where data will be restored.
spec.executionOrder specifies whether Stash should restore the targets sequentially or parallelly. If
spec.executionOrder is set to
Parallel, Stash will start to restore of all the targets simultaneously. If it is set to
Sequential, Stash will not start restoring a target until all the previous members have completed their restore process. The default value of this field is
spec.members field specifies a list of targets to restore. Each member consists of the following fields:
target : Each member has a target specification. The target specification of a member is the same as the target specification of a
RestoreSession explained here.
task specifies the name and parameters of the Task crd to use to restore the member. For more details, please see here.
runtimeSettings allows to configure runtime environment for the restore init-container or job. You can specify runtime settings at both pod level and container level. For more details, please see here.
tempDir : Stash mounts an
emptyDir for holding temporary files. It is also used for
caching for faster restore performance. You can configure the
tempDir section. You can also disable
caching using this field. For more details, please see here.
interimVolumeTemplate : For some targets (i.e. some databases), Stash can’t directly pipe the restored data into the target. In this case, it has to store the restored data temporarily before injecting into the target.
spec.interimVolumeTemplate specifies a PVC template for holding those data temporarily. Stash will create a PVC according to the template and use it to store the data temporarily. This PVC will be deleted automatically if you delete the
hooks : Each member has it’s own
hooks field which allows you to execute member-specific pre-restore or post-restore hooks. For more details about hooks, please visit here.
spec.hooks allows performing some global actions before and after the restoration process. You can send HTTP requests to a remote server via
httpPost. You can check whether a TCP port is open using
tcpSocket hooks. You can also execute some commands using
spec.hooks.preRestorehooks are executed before restoring any of the members.
spec.hooks.postRestorehooks are executed after restoring all the members.
For more details on how hooks work in Stash and how to configure different types of hook, please visit here.
RestoreBatch object has the following fields in the
phase shows the overall phase of the restore process. It will be
Succeeded only if all the targets are restored successfully.
sessionDuration shows the total time taken to complete the entire restoration process.
conditions : The
conditions field shows conditions of different steps of the restore process. The following conditions are set by the Stash operator for a RestoreBatch:
|Indicates whether the respective Repository object was found or not.|
|Indicates whether the respective backend secret was found or not.|
|Indicates whether the global PreRestoreHook was executed successfully or not.|
|Indicates whether the global PostRestoreHook was executed successfully or no.|
memberssection shows the restore status of the individual members. Each entry has the following fields:
refpoints to the respective target whose status is shown here.
phaseshows the restore phase of the member.
conditionsshows the conditions of different steps of restoring this member. Stash set the following conditions for each restore members.
|Indicates whether the restore target was found or not.|
|Indicates whether stash init-container was injected into the targeted workload. This condition is applicable only for the sidecar model.|
|Indicates whether the restore job was created or not. This condition is only applicable in the job model.|
totalHostsfield specifies the total number of hosts that will be restored for this member.
statssection is an array of restore statistics of individual hosts. Individual host stats entry consists of the following fields:
hostnameindicates the name of the host. Usually it is the
alias-<workload-specific-suffix>. For more details, please visit here.
phaseindicates the restore phase of this host.
durationindicates the total time taken to complete the restore process for this host.
errorshows the reason for failure if the restore process fails for this host.