etcdctl_cmd() {
    CLUSTER=${1}
    VM=${2}

    shift 2

    kubectl_cmd "${VM}" -n kube-system exec -t "${CLUSTER}-etcd-${VM}" -- etcdctl "${@}"
}

etcdctl_member_list() {
    CLUSTER=${1}
    VM=${2}
    shift 2

    etcdctl_cmd "${CLUSTER}" "${VM}" member list -w json | jq -r '.members[].name' | sort
}