Comment 49 for bug 1820083

TEST CASE:
1. use focal series lxc container
2. Enable proposed repo in /etc/apt/sources.list
3. deb http://archive.ubuntu.com/ubuntu focal-proposed main universe
4. sudo apt-get update
5. apt install etcd-client
6. apt-get install python3-etcd3gw #Focal has renamed this package with python3-etcd3gw
7. wget https://github.com/etcd-io/etcd/releases/download/v3.3.13/etcd-v3.3.13-linux-amd64.tar.gz
8. tar -xvf etcd-v3.3.13-linux-amd64.tar.gz
9. openssl req -x509 -keyout localhost.key -newkey rsa:4096 -nodes -sha256 -out localhost.crt
10. ./etcd --name infra0 --data-dir infra0 --cert-file=/root/python-etcd3gw-0.2.1/localhost.crt --key-file=/root/python-etcd3gw-0.2.1/localhost.key --advertise-client-urls=https://127.0.0.1:2379 --listen-client-urls=https://127.0.0.1:2379
11. curl --cacert localhost.crt --key localhost.key --cert localhost.crt https://127.0.0.1:2379/health
    response - {"health":"true"}
12. etcdctl --endpoints https://127.0.0.1:2379 --ca-file=localhost.crt --cert-file=localhost.crt --key-file=localhost.key member list
    response = 8e9e05c52164694d: name=infra0 peerURLs=http://localhost:2380 clientURLs=https://127.0.0.1:2379 isLeader=true
13. etcdctl --endpoints https://127.0.0.1:2379 --ca-file=localhost.crt --cert-file=localhost.crt --key-file=localhost.key set foo bar
 response - bar

VERIFICATION DONE
you can connect to the etcd server with certificate information provided

TROUBLESHOOTING
** See above troubleshooting steps