Comment 8 for bug 1931719

Test: generated a new image with this change (using dev branch), installed in an AIO-SX VM and executed curl command below.

controller-0:~$ sudo curl --cacert /etc/etcd/ca.crt --cert /etc/etcd/etcd-client.crt --key /etc/etcd/etcd-client.key -i https://192.168.206.1:2379/health
Password:
HTTP/1.1 200 OK
Date: Wed, 07 Jul 2021 15:05:41 GMT
Content-Length: 17
Content-Type: text/plain; charset=utf-8

{"health":"true"}