Merge pull request #33997 from kalexand-rh/BZ1846118

BZ1846118: adding etcd db verification step

Author: kalexand-rh

modules/backup-etcd.adoc

@@ -56,20 +56,27 @@ sh-4.4# /usr/local/bin/cluster-backup.sh /home/core/assets/backup
 .Example script output
 [source,terminal]
 ----
-1bf371f1b5a483927cd01bb593b0e12cff406eb8d7d0acf4ab079c36a0abd3f7
-etcdctl version: 3.3.18
-API version: 3.3
-found latest kube-apiserver-pod: /etc/kubernetes/static-pod-resources/kube-apiserver-pod-7
-found latest kube-controller-manager-pod: /etc/kubernetes/static-pod-resources/kube-controller-manager-pod-8
-found latest kube-scheduler-pod: /etc/kubernetes/static-pod-resources/kube-scheduler-pod-6
-found latest etcd-pod: /etc/kubernetes/static-pod-resources/etcd-pod-2
-Snapshot saved at /home/core/assets/backup/snapshot_2020-03-18_220218.db
+found latest kube-apiserver: /etc/kubernetes/static-pod-resources/kube-apiserver-pod-6
+found latest kube-controller-manager: /etc/kubernetes/static-pod-resources/kube-controller-manager-pod-7
+found latest kube-scheduler: /etc/kubernetes/static-pod-resources/kube-scheduler-pod-6
+found latest etcd: /etc/kubernetes/static-pod-resources/etcd-pod-3
+ede95fe6b88b87ba86a03c15e669fb4aa5bf0991c180d3c6895ce72eaade54a1
+etcdctl version: 3.4.14
+API version: 3.4
+{"level":"info","ts":1624647639.0188997,"caller":"snapshot/v3_snapshot.go:119","msg":"created temporary db file","path":"/home/core/assets/backup/snapshot_2021-06-25_190035.db.part"}
+{"level":"info","ts":"2021-06-25T19:00:39.030Z","caller":"clientv3/maintenance.go:200","msg":"opened snapshot stream; downloading"}
+{"level":"info","ts":1624647639.0301006,"caller":"snapshot/v3_snapshot.go:127","msg":"fetching snapshot","endpoint":"https://10.0.0.5:2379"}
+{"level":"info","ts":"2021-06-25T19:00:40.215Z","caller":"clientv3/maintenance.go:208","msg":"completed snapshot read; closing"}
+{"level":"info","ts":1624647640.6032252,"caller":"snapshot/v3_snapshot.go:142","msg":"fetched snapshot","endpoint":"https://10.0.0.5:2379","size":"114 MB","took":1.584090459}
+{"level":"info","ts":1624647640.6047094,"caller":"snapshot/v3_snapshot.go:152","msg":"saved","path":"/home/core/assets/backup/snapshot_2021-06-25_190035.db"}
+Snapshot saved at /home/core/assets/backup/snapshot_2021-06-25_190035.db
+{"hash":3866667823,"revision":31407,"totalKey":12828,"totalSize":114446336}
 snapshot db and kube resources are successfully saved to /home/core/assets/backup
 ----
 +
 In this example, two files are created in the `/home/core/assets/backup/` directory on the master host:
 
-* `snapshot_<datetimestamp>.db`: This file is the etcd snapshot.
+* `snapshot_<datetimestamp>.db`: This file is the etcd snapshot. The `cluster-backup.sh` script confirms its validity.
 * `static_kuberesources_<datetimestamp>.tar.gz`: This file contains the resources for the static pods. If etcd encryption is enabled, it also contains the encryption keys for the etcd snapshot.
 +
 [NOTE]