kubernetes integration

This integration allows plakar to backup and restore kubernetes resources and PersistentVolumes, both via the CSI driver snapshot feature (preferred) and without.

Configuration

• kubeconfig_file: optional, point to a kube config file. Defaults to ~/.kube/config.
• kubeconfig: optional, content of a kube config passed inline. Takes precedence over kubeconfig_file.
• kubelet_image: optional, used only for PVC backups. Defaults to a recent version of the kubelet image.
• labels: optional, used only for configuration backup. Limits the manifests to backup to the ones matching the given labels.
• volume_snapshot_class: required for CSI-based PVC backups. It's the volume snapshot class to use.

Examples

Backup all the resources applied to a kubernetes cluster:

$ plakar backup k8s:/

Same as before but only for the resources in the foo namespace:

$ plakar backup k8s:/foo

Restore all the StatefulSets in the foo namespace:

$ plakar restore -to k8s: abcd:/foo/apps/StatefulSet

Backup the PVC my-pvc in the storage namespace:

$ plakar backup -o volume_snapshot_class=my-snapclass k8s+csi:/storage/my-pvc

Restore inside a new, pristine, PersistentVolumeClaim:

$ kubectl create -f -
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pristine
  namespace: storage
spec:
  resources:
	requests:
	 storage: 1Gi
  accessModes:
   - ReadWriteOnce
$ plakar restore -to k8s+pvc:/storage/pristine abcdef:

of course it's possible to restore the data inside an already existing PVC as well.