Etcdctl exec gives error

Kubernetes
#1

Hello,

I am following CKA course. In etcd example video shows to run following command :

kubectl exec etcd-master -n kube-system etcdctl get / --prefix -keys-only

but I am getting error as Error: unknown flag: --prefix.

May I know if I am doing something wrong here. Attached is the screenshot from course video and my environment.

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Thanks
Ashish

#2

Hello @06ashishrawat
Let me know.
kubectl exec etcd-master -n kube-system – etcdctl get / --prefix --keys-only

#3

Hello @Tej-Singh-Rana here is the output :

[root@master ~]# kubectl exec etcd-master -n kube-system – etcdctl get / --prefix --keys-only
Error: unknown flag: --prefix
See ‘kubectl exec --help’ for usage.
[root@master ~]#

Thanks
Ashish

#4

Where you are performing this?

#5

In my k8s cluster, it’s a three node cluster.1 master and 2 worker.

here is the details :

[root@master ~]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
master Ready master 47d v1.18.6 192.168.120.220 CentOS Linux 7 (Core) 3.10.0-1127.13.1.el7.x86_64 docker://1.13.1
worker-1 Ready 47d v1.18.6 192.168.120.221 CentOS Linux 7 (Core) 3.10.0-1127.13.1.el7.x86_64 docker://1.13.1
worker-2 Ready 47d v1.18.6 192.168.120.222 CentOS Linux 7 (Core) 3.10.0-1127.13.1.el7.x86_64 docker://1.13.1
[root@master ~]#

Thanks
Ashish

#6 
kubectl exec etcd-master -n kube-system -- etcdctl get / --prefix --keys-only --cacert /etc/kubernetes/pki/etcd/ca.crt --key /etc/kubernetes/pki/etcd/server.key --cert /etc/kubernetes/pki/etcd/server.crt
#7 
ETCDCTL_API='3' etcdctl get / --prefix --keys-only \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--key /etc/kubernetes/pki/etcd/server.key \
--cert /etc/kubernetes/pki/etcd/server.crt \
--endpoints=127.0.0.1:2379

Try from your terminal without mention, etcd-master Pod.

#8

This one is working :

[root@master ~]# kubectl exec etcd-master -n kube-system – etcdctl get / --prefix --keys-only --cacert /etc/kubernetes/pki/etcd/ca.crt --key /etc/kubernetes/pki/etcd/server.key --cert /etc/kubernetes/pki/etcd/server.crt
/registry/apiregistration.k8s.io/apiservices/v1.

/registry/apiregistration.k8s.io/apiservices/v1.admissionregistration.k8s.io

Thanks, at this point I won’t ask how and why :slight_smile: I am sure in future topics all this will get clear.

As usual, thanks a lot for your great support all the time.

#9

It should be work. But continue new releases and bug fixes. So they changed process time to time. To make it more secure.

#10

great, thanks a lot for clarification…