Ubuntu 18.04
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HAProxy : SSL/TLS Settings
2018/12/04
 
Configure HAProxy with SSL/TLS connection.
The connection between HAproxy and Clients are encrypted with SSL. ( HAproxy - backends are normal )
In addition to previous HTTP setting, This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
           |                           |                          |
           |10.0.0.30                  |10.0.0.51                 |10.0.0.52
+----------+-----------+   +-----------+----------+   +-----------+----------+
|   [ dlp.srv.world ]  |   | [ node01.srv.world ] |   | [ node02.srv.world ] |
|        HAProxy       |   |      Web Server#1    |   |      Web Server#2    |
+----------------------+   +----------------------+   +----------------------+

[1]
[2] Configure HAProxy.
concatinate cert and key

root@dlp:~#
cd /etc/letsencrypt/live/dlp.srv.world

root@dlp:/etc/letsencrypt/live/dlp.srv.world#
cat fullchain.pem privkey.pem > haproxy.pem

root@dlp:~#
root@dlp:~#
vi /etc/haproxy/haproxy.cfg
# add into frontend section (if not need to listening 80 port)

frontend http-in
        bind *:80
        bind *:443 ssl crt /etc/letsencrypt/live/dlp.srv.world/haproxy.pem 

root@dlp:~#
systemctl restart haproxy

[3] Verify working normally to access with HTTPS to frontend HAproxy Server.
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