Once applications have been protected via a policy or a manual action, it is possible to restore them in-place or clone them into a different namespace.
Restore can take a few minutes as this depends on the amount of data captured by the restore point. The restore time is usually dependent on the speed of the underlying storage infrastructure as times are dominated by how long it takes to rehydrate captured data followed by recreating the application containers.
Restoring Existing Applications
Restoring an application is accomplished via the Applications page.
One needs to simply click the
While the UI uses the
Export term for backups, no
Import policy is needed to restore from a backup.
policies are only needed when you want to restore the application
into a different cluster.
At that point, one has the option to pick a restore point, a grouped collection of data artifacts belonging to the application, to restore from. As seen above, this view distinguishes manually generated restore points from automated policy-generated ones.
It also distinguishes between snapshots and backups. When both are present, as seen above, a layered box is shown to indicate more than one kind of restore point is present for the same data. If you want to restore a version of the application stack, clicking on the layered restore point will present the below option to select between the local snapshot and exported backup.
Selecting a restore point will bring up a side-panel containing more details on the restore point for you to preview, if needed, before you initiate an application restore.
Once you click
Restore Application, the system will automatically
recreate the entire application stack into the selected
namespace. This not only includes the data associated with the
original application but also the versioned container images.
The treatment of namespaced resources which already exist when the restore is
invoked depends on whether or not the
overwriteExisting flag is set. If
overwriting is not chosen then existing objects are not restored and
instead maintain their current state. If it is selected then they are restored
to their state at the time of the restore point creation.
Immutable Secrets and ConfigMaps are also restored to the restore point version
unless explicitly excluded during restore.
If desired, use Restore Filtering to selectively control the namespaced
objects that are restored.
Global/non-namespaced resources are only restored if they don't currently
exist. ServiceAccounts are also not restored if already present in the
namespace, regardless of the value of the
After the restore completes, you will be able to go back to your application and verify that the state was restored to what existed at the time the restore point was obtained.
Restoring Deleted Applications
The process of restoring a deleted application is nearly identical to
the above process. The only difference is that, by default, removed
applications are not shown on the Applications page. To discover them,
you simply need to filter and select
Once the filter is in effect, you will see applications that K10 has previously protected but no longer exist. These can now be restored using the normal restore workflow.
Currently, K10 only supports
Allowed Topologiesconsisting of a single zone. If more than one zone is provided, K10 will choose the first one.
Changing the size of a PersistentVolumeClaim resource (PVC) on restore via transform is not supported.
A resource's owner references will not be preserved if a transform changes the name of the resource to an auto-generated name (generatedName).
By default, a restore will bring back all artifacts and data captured during the backup process. However, there are times where only a subset of these artifacts are required and, to support that use case, the restore workflow supports two distinct filtering options.
Artifact Filtering: Full-control over what artifacts and data to restore
Data-Only Restore: Data-only restore (usually for a running application)
As seen in the above diagram, it is possible to selectively bring back restore point artifacts (including volume snapshots). This is useful for scenarios such as single PVC restore or rolling back configuration updates. By default, all artifacts are selected for restore.
To preserve owner references, both the resource and its owners must be included by the filters.
As seen in the above sections, it is also possible to select a
Data-Only Restore. While, at the surface level, this is similar to
just selecting all volume snapshots and no Kubernetes specs, there are
a number of safety guardrails for successful data-only restores. The
important differences to be aware of include:
The Kubernetes workloads (Deployments, StatefulSets, etc.) captured in the restore point must exist in the namespace the application is being restored in
The running Kubernetes workloads must have the same number of replicas as captured in the restore point
The Kubernetes workloads must also have same volumes as were gathered in the restore point (number of volumes, names of the volumes)
These guardrails are in place as data-only restore is frequently used to bring older versions of data into a newer version of application code. In those scenarios, these checks are essential to ensure that a successful restore can be completed.
Data-Only Restore follows delete and restore from backup approach for the PVCs to maintain data integrity.
Instant Recovery will get an exported restore point up and running much faster than a regular restore. This feature requires vSphere 7.0.3+ and a Veeam Backup server version V12 or higher. This is not supported on vSphere with Tanzu clusters at this time. Before using Instant Recovery, you should ensure that all Storage Classes in your Kubernetes clusters are configured to avoid placing new volumes in the Instant Recovery datastore. Please see this Knowledge Base article for recommendations on Storage Classes for use with Instant Recovery. After an Instant Recovery has completed it is important to release the Instant Recovery session by either migrating the volumes to your primary storage or removing and releasing the volumes. Please see the Instant Recovery section for more details on how Instant Recovery works.
Currently Instant Recovery is only supported for Restore Actions, not Restore Policies. To use Instant Recovery, select the Enable Instant Recovery checkbox (this will only appear if all compatibility criteria are met) or set the InstantRestore property in the RestoreAction spec.
All restore features are supported with Instant Recovery.
By default, K10 restores Kubernetes resources as they exist in the restore point. However, there are times when the restore target does not match the environment of the backup. For these situations, K10 allows Kubernetes resource artifacts to be transformed on restore.
For example, if a restore point was created in one cloud provider and it should be restored into a cluster in a different cloud provider, it might be necessary to use a transform that updates the container image URLs in some resources, or one that changes storage class settings.
To apply transforms to the restored application, enable
Apply transforms to restored resources under
Restore After Import.
Add transforms using transform sets
A complete guide of how to setup a transform set can be found here.
Add a reference to an existing transform set will open a
form for selecting a transform set.
Type the name of the transform set and click
A reference to the transform set will then be added to the form.
SET label helps identify transforms which are stored and
referenced rather than those that are created inline via
Add new transform.
Add new custom transform
A complete specification of how transforms can be configured can be found here.
Add new transform will open a form for creating a new
On the form, name the transform, select which resources the transform will be applied to, and then create one or more operations.
Each operation will have its own panel allowing customization and testing of the selected operation.
Operations can be tested against any resources to verify the outcome of the operations. The ability to apply transforms will provide flexibility in migration workflows between environments where more than just a like for like recovery is needed.
Extract transforms as transform set to reuse them
To make a transform set from a sequence of transforms already defined
Extract this list as new transform set.
Type the name of new transform set and, optionally, its description.
Create transform set. After successful creation all transforms
will be replaced with the reference of the created transform set.
By default, K10 restores applications into the original namespace the restore point was created from. However, as the above image shows, the target namespace can be changed and new namespaces can be created at this point. In particular, this functionality can be used to extract only a few files or subset of the originally gathered data with requiring a complete rollback of the primary application. Other use cases include debugging and test/dev purposes or for cloning.
During restores it is possible to rename PVCs depending on how the workload has been configured. While preparing the restore, transformation(s) targeting the relevant PVC(s) and specifying the new name(s) should be created.
For it to restore successfully to a new PVC, all references to the PVCs in
other resources must also be transformed. For example, in a deployment that
specifies a PVC claim name, this must also be updated e.g. replacing
"new-name" in the example above. The same path can also be found in
some StatefulSets and DeploymentConfigs setups and should also be updated
in such cases.
If the StatefulSet makes use of
volumeClaimTemplates then PVCs can
partially be renamed by changing
/spec/volumeClaimTemplates/0/metadata/name) as well as the reference in
the volume mounts (e.g.
/spec/template/spec/containers/0/volumeMounts/0/name) along with renaming
each PVC, assuming the replicas have separate PVCs. It is
currently only possible to rename PVCs of a StatefulSet that uses
volumeClaimTemplates into a new namespace.
Renaming PVCs related to VirtualMachines involves renaming the PVCs and
related DataVolumes (to have matching names), as well as transforming
DataVolume references in the VirtualMachine resource. This also includes
ownerReferences on the PVC(s) to reference the new
DataVolume name. VirtualMachines can only be restored into a new namespace.
Using an Alternate Location Profile
An exported restore point can be selected to restore an application from a location outside the cluster. By default, it is assumed that the restore point exists at the location it was originally exported to. However, the "Alternate Location Profile" option can be used to select a different location profile to restore from. This can be useful if, for example, restore points have been copied or moved to a different location.