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The following example sets up the Ark server and client, then backs up and restores a sample application.
For simplicity, the example uses Minio, an S3-compatible storage service that runs locally on your cluster.
NOTE The example lets you explore basic Ark functionality. In the real world, however, you would back your cluster up to external storage.
See Set up Ark on your platform for how to configure Ark for a production environment.
ark backup delete.
Clone or fork the Ark repository:
git clone email@example.com:heptio/ark.git
NOTE: Make sure to check out the appropriate version. We recommend that you check out the latest tagged version. The master branch is under active development and might not be stable.
Start the server and the local storage service. In the root directory of Ark, run:
kubectl apply -f examples/common/00-prereqs.yaml kubectl apply -f examples/minio/
NOTE: If you get an error about Config creation, wait for a minute, then run the commands again.
Deploy the example nginx application:
kubectl apply -f examples/nginx-app/base.yaml
Check to see that both the Ark and nginx deployments are successfully created:
kubectl get deployments -l component=ark --namespace=heptio-ark kubectl get deployments --namespace=nginx-example
Make sure that you install somewhere in your PATH.
Create a backup for any object that matches the
app=nginx label selector:
ark backup create nginx-backup --selector app=nginx
Alternatively if you want to backup all objects except those matching the label
ark backup create nginx-backup --selector 'backup notin (ignore)'
Simulate a disaster:
kubectl delete namespace nginx-example
To check that the nginx deployment and service are gone, run:
kubectl get deployments --namespace=nginx-example kubectl get services --namespace=nginx-example kubectl get namespace/nginx-example
You should get no results.
NOTE: You might need to wait for a few minutes for the namespace to be fully cleaned up.
ark restore create --from-backup nginx-backup
ark restore get
After the restore finishes, the output looks like the following:
NAME BACKUP STATUS WARNINGS ERRORS CREATED SELECTOR nginx-backup-20170727200524 nginx-backup Completed 0 0 2017-07-27 20:05:24 +0000 UTC <none>
NOTE: The restore can take a few moments to finish. During this time, the
STATUS column reads
After a successful restore, the
STATUS column is
ERRORS are 0. All objects in the
nginx-example namespace should be just as they were before you deleted them.
If there are errors or warnings, you can look at them in detail:
ark restore describe <RESTORE_NAME>
For more information, see the debugging information.
If you want to delete any backups you created, including data in object storage and persistent volume snapshots, you can run:
ark backup delete BACKUP_NAME
This asks the Ark server to delete all backup data associated with
BACKUP_NAME. You need to do
this for each backup you want to permanently delete. A future version of Ark will allow you to
delete multiple backups by name or label selector.
Once fully removed, the backup is no longer visible when you run:
ark backup get BACKUP_NAME
If you want to uninstall Ark but preserve the backup data in object storage and persistent volume
snapshots, it is safe to remove the
heptio-ark namespace and everything else created for this
kubectl delete -f examples/common/ kubectl delete -f examples/minio/ kubectl delete -f examples/nginx-app/base.yaml