Kubernetes Administrator Flashcards (CKA)

1
ETCDCTL_API=3 etcdctl snapshot save /backup/etcd.db \
2
  --endpoints=https://127.0.0.1:2379 \
3
  --cacert=/etc/kubernetes/pki/etcd/ca.crt \
4
  --cert=/etc/kubernetes/pki/etcd/server.crt \
5
  --key=/etc/kubernetes/pki/etcd/server.key

1
ETCDCTL_API=3 etcdctl snapshot restore /backup/etcd.db \
2
  --data-dir=/var/lib/etcd-restore

1
kubeadm token create --print-join-command

1
kubectl auth can-i create deployments --as=jane -n dev

1
kubectl config use-context prod
2
kubectl config set-context --current --namespace=team-a

1
kubectl taint nodes node1 key=value:NoSchedule

1
kubectl drain node1 --ignore-daemonsets --delete-emptydir-data

1
spec:
2
  podSelector: {}
3
  policyTypes:
4
    - Ingress

1
metadata:
2
  annotations:
3
    storageclass.kubernetes.io/is-default-class: 'true'

1
kubectl describe pod mypod
2
kubectl logs mypod -c mycontainer

1
kubectl logs mypod --previous

1
systemctl status kubelet
2
journalctl -u kubelet -f

1
kubectl top nodes
2
kubectl top pods -A

1
kubectl run tmp --rm -it --image=busybox -- sh

1
kubectl get events --sort-by=.metadata.creationTimestamp

1
kubeadm certs check-expiration

1
ETCDCTL_API=3 etcdctl endpoint health \
2
  --endpoints=https://127.0.0.1:2379 \
3
  --cacert=/etc/kubernetes/pki/etcd/ca.crt \
4
  --cert=/etc/kubernetes/pki/etcd/server.crt \
5
  --key=/etc/kubernetes/pki/etcd/server.key