Certified Kubernetes Administrator CKA — Question 4

Topic 1 · Question 4 of 23

Topic 1 · Question 4

SIMULATION - Task - First, create a snapshot of the existing etcd instance running at https://127.0.0.1:2379, saving the snapshot to /var/lib/backup/etcd-snapshot.db. Next, restore an existing, previous snapshot located at /var/lib/backup/etcd-snapshot-previous.db.

Suggested solution

ETCDCTL_API=3 etcdctl snapshot save /var/lib/backup/etcd-snapshot.db --endpoints=https://127.0.0.1:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key
ETCDCTL_API=3 etcdctl snapshot restore /var/lib/backup/etcd-snapshot-previous.db --data-dir=/var/lib/etcd-from-backup
# Point the etcd static Pod data-dir/hostPath at /var/lib/etcd-from-backup and verify the API server.

The snapshot uses the etcd client certificates; restoration creates a new data directory that etcd must be configured to use.

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