How to run etcdctl with kubectl

etcdctl-via-kubectl.txt

shaji:kube-sandbox/ $ kubectl get pods --all-namespaces                                                               

NAMESPACE     NAME                                         READY   STATUS    RESTARTS   AGE
kube-system   coredns-5c98db65d4-jx5r4                     1/1     Running   5          2d
kube-system   coredns-5c98db65d4-pwn5t                     1/1     Running   5          2d
kube-system   etcd-ohms1.aimistic.com                      1/1     Running   1          24h
kube-system   kube-apiserver-ohms1.aimistic.com            1/1     Running   1          24h
kube-system   kube-controller-manager-ohms1.aimistic.com   1/1     Running   1          24h
kube-system   kube-flannel-ds-arm-8q7v8                    1/1     Running   112        2d
kube-system   kube-flannel-ds-arm-9brps                    1/1     Running   111        2d
kube-system   kube-flannel-ds-arm-hg6gp                    1/1     Running   112        2d
kube-system   kube-flannel-ds-arm-hz5w2                    1/1     Running   265        2d
kube-system   kube-proxy-6pgzj                             1/1     Running   1          24h
kube-system   kube-proxy-cpf7s                             1/1     Running   2          24h
kube-system   kube-proxy-s4gkq                             1/1     Running   2          24h
kube-system   kube-proxy-sgthk                             1/1     Running   2          24h
kube-system   kube-scheduler-ohms1.aimistic.com            1/1     Running   1          24h
kube-system   kubernetes-dashboard-747c54c5f-vkxfm         1/1     Running   2          2d

shaji:kube-sandbox/ $ kubectl exec -ti -n kube-system etcd-ohms1.aimistic.com -- ps aux                                  
PID   USER     TIME  COMMAND
    1 root      7:25 etcd --advertise-client-urls=https://192.168.86.210:2379 -
12795 root      0:00 ps aux

shaji:kube-sandbox/ $ ADVERTISE_URL="https://192.168.86.210:2379"                                                        

shaji:kube-sandbox/ $ kubectl exec etcd-ohms1.aimistic.com -n kube-system -- sh -c \ 
"ETCDCTL_API=3 etcdctl \
--endpoints $ADVERTISE_URL \
--cacert /etc/kubernetes/pki/etcd/ca.crt \
--key /etc/kubernetes/pki/etcd/server.key \
--cert /etc/kubernetes/pki/etcd/server.crt \
get \"\" --prefix=true -w json" > etcd-kv.json