Exam CKA topic 1 question 4 discussion

The solution does not fully solve the excercise, because the restore operation creates a default.etcd directory in the current directory where the utility ectdctl is called. Inside the newly created defaultl.etcd directory, it's a subdirectory called "member" containing the actual backup. That location is for sure not the one that is configured at etcd start. First is advisable to find out where the ETCD data is (--data-dir flag at service start). To effectively apply the backup, for instance, after stopping the service, we should move the targeted "member" folder in --data-dir location, let's name it $DATA_DIR_PATH, and decorate the restore operation with the flag data-dir set to $DATA_DIR_PATH: # #-- SERVICE ETCD STOPPED -- ... # mv $DATA_DIR_PATH/member $SOME_OTHER_LOCATION # ETCDCTL_API=3 etcdctl --data-dir $DATA_DIR_PATH snapshot restore /var/lib/backup/etcd-snapshot-previous.db # #-- SERVICE ETCD STARTED --

You may have 2 etcd instances. One running in the cluster itself and the second one running outside the kubernetes cluster. They are not asking you to change context so DO NOT restore in the kubernets cluster. Follow these steps outside the cluster: 1.Execute “member list” and “snapshot status” to check hash 2.systemctl stop etcd 3.restore another backup using same certs, endpoint, and different dir 4.chown -R etcd:etcd /DIR_YOU_RESTORE 5.change dir in the service file 6.system daemon-reload 7.systermctl start etcd 8.systemctl status etcd 9.member list - to check you have different hash

Any update about this task? Is there any step-by-step guide?

also, after restore, the pv created in the previous question was no longer available because both the questions were to be resolved in the same context

after restore, I couldnt find any pods,nodes on the cluster. Is this expected? does this mean that the 2nd snapshot didnt have any data?

In the real exam you need restore from /var/lib/backup/etcd-snapshot-previous.db and there will be a permission issue, to fix this you need to be a root user and change owner permission then you need to restore db backup