Free Access LinuxFoundation.CKA.v2024-04-21.q67 Practice Test (Page 7)

Question 26

Create a ETCD backup of kubernetes cluster
Note : You don't need to memorize command, refer -
https://kubernetes.io/docs/tasks/administer-cluster/configureupgrade-etcd/ during exam

A.ETCDCTL_API=3 etcdctl --endpoints=[ENDPOINT] --cacert=[CA CERT]
--cert=[ETCD SERVER CERT] --key=[ETCD SERVER KEY] snapshot save
[BACKUP FILE NAME]
In exam, cluster setup is done with kubeadm , this means ETCD
used by the kubernetes cluster is coming from static pod.
kubectl get pod -n kube-system
kubectl describe pod etcd-master -n kube-system
You can locate the information on
endpoint: - advertise-client-urls=https://172.17.0.15:2379
ca certificate: - trusted-cafile=/etc/kubernetes/pki/etcd/ca.crt
server certificate : - certfile=/etc/kubernetes/pki/etcd/server.crt
key: - key-file=/etc/kubernetes/pki/etcd/server.key
To Create backup
export ETCDCTL_API=3
(or)
ETCDCTL_API=3 etcdctl ETCDCTL_API=3 etcdctl --
endpoints=https://172.17.0.15:2379 --
cacert=/etc/kubernetes/pki/etcd/ca.crt --
cert=/etc/kubernetes/pki/etcd/server.crt --
key=/etc/kubernetes/pki/etcd/server.key snapshot save etcdsnapshot.db
//Verify
ETCDCTL_API=3 etcdctl --write-out=table snapshot status
snapshot.db

B.ETCDCTL_API=3 etcdctl --endpoints=[ENDPOINT] --cacert=[CA CERT]
--cert=[ETCD SERVER CERT] --key=[ETCD SERVER KEY] snapshot save
[BACKUP FILE NAME]
In exam, cluster setup is done with kubeadm , this means ETCD
used by the kubernetes cluster is coming from static pod.
kubectl get pod -n kube-system
kubectl describe pod etcd-master -n kube-system
You can locate the information on
endpoint: - advertise-client-urls=https://172.16.0.18:2379
ca certificate: - trusted-cafile=/etc/kubernetes/pki/etcd/ca.crt
server certificate : - certfile=/etc/kubernetes/pki/etcd/server.crt
key: - key-file=/etc/kubernetes/pki/etcd/server.key
To Create backup
export ETCDCTL_API=3
(or)
ETCDCTL_API=3 etcdctl ETCDCTL_API=3 etcdctl --
endpoints=https://172.17.0.15:2379 --
key=/etc/kubernetes/pki/etcd/server.key snapshot save etcdsnapshot.db
//Verify
ETCDCTL_API=3 etcdctl --write-out=table snapshot status
snapshot.db

Question 27

Update the deployment with the image version 1.16.1 and verify the image and check the rollout history

Question 28

Check to see how many worker nodes are ready (not including nodes tainted NoSchedule) and write the number to /opt/KUCC00104/kucc00104.txt.

Question 29

Configure the kubelet systemd- managed service, on the node labelled with name=wk8s-node-1, to launch a pod containing a single container of Image httpd named webtool automatically. Any spec files required should be placed in the /etc/kubernetes/manifests directory on the node.
You can ssh to the appropriate node using:
[student@node-1] $ ssh wk8s-node-1
You can assume elevated privileges on the node with the following command:
[student@wk8s-node-1] $ | sudo -i