Haproxy redirect configuration for plex? - proxy

Question

Hope someone can help me :)
I try to configure HAProxy for plex redirection but didn't found the solution yet.
So basically to run plex home page you should go to => IPADRESS:PORT/web which redirect to IPADRESS:PORT/web/index.html
I made this kind of redirect:
use_backend plex if { hdr_beg(Host) -i plex. }
backend plex
server plex localhost:32400 check
This is ok, i can join plex => plex.mydomain.tld/web
But i would like to be able to join plex with this URL => plex.mydomain.tld
I tried to add this line:
reqrep ^([^\ :]*)\ /(.*) \1\ /web\2
Changing is fine, my URL switch to => plex.mydomain.tld/web/index.html
But i have a 404 ERROR...
What kind of trick i should do to acces plex from plex.mydomain.tld ?
Thanks !

Answer 1

Found some info that helped me figure it out:
global
log 127.0.0.1 syslog
maxconn 1000
user haproxy
group haproxy
daemon
tune.ssl.default-dh-param 4096
ssl-default-bind-options no-sslv3 no-tls-tickets
ssl-default-bind-ciphers EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH
defaults
log global
mode http
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
option contstats
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout check 10s
listen stats
bind *:9090
mode http
maxconn 10
stats enable
stats hide-version
stats realm Haproxy\ Statistics
stats uri /
stats auth admin:admin
frontend ALL
bind *:80
bind *:443 ssl crt /etc/haproxy/certs/nomercy.myqnapcloud.com.pem crt /etc/haproxy/certs/nomercy.myqnapcloud.com.pem
mode http
# Define path for lets encrypt
acl is_letsencrypt path_beg -i /.well-known/acme-challenge/
use_backend letsencrypt if is_letsencrypt
# Define hosts
acl host_website hdr(host) -i nomercy.myqnapcloud.com
# Direct hosts to backend
use_backend website if host_website
# Redirect port 80 to 443
# But do not redirect letsencrypt since it checks port 80 and not 443
redirect scheme https code 301 if !{ ssl_fc } !is_letsencrypt
backend letsencrypt
server letsencrypt 127.0.0.1:8888
backend website
balance roundrobin
option httpchk GET /check
cookie SERVERID insert indirect nocache
http-check expect rstring ^UP$
default-server inter 3s fall 3 rise 2
server server1 192.168.2.151:8888 check
server server2 192.168.2.152:8888 check
server server3 192.168.2.153:8888 check
listen plex
bind *:32400 ssl crt /etc/haproxy/certs/nomercy.myqnapcloud.com.pem crt /etc/haproxy/certs/nomercy.myqnapcloud.com.pem
balance roundrobin
option httpchk GET /check
http-check expect rstring ^UP$
default-server inter 3s fall 3 rise 2
server server1 192.168.2.149:32400 check port 8888
server server2 192.168.2.148:32400 check port 8888
server server3 192.168.2.147:32400 check port 8888
You can remove the ssl credentials if you don't have it installed.

Answer 2

The problem here unfortunately has nothing to do with your HAProxy configuration. Instead it is Plex that is causing the issue.
Example
With your configuration, when you go to plex.mydomain.tld HAProxy is adding in the /web and as a result Plex gets the following url: plex.mydomain.tld/web. This is correct however Plex will then want to forward the browser on to plex.mydomain.tld/web/index.html. But when the browser sends a request or that url, HAProxy steps in and adds that extra /web again and the resulting url that is set to Plex is plex.mydomain.tld/web/web/index.html which doesn't exist and hence the 404 error you got.
While going to plex.mydomain.tld/index.html may work, I assume all links from that page to any other page won't work due to the say issue.
To solve this you could
Look through Plex's configuration to see if it is possible to run it with out the /web.
Taking inspiration from here, you could configure HAProxy something like this:
frontend http
mode http
bind *:80
acl plex hdr_beg(Host) -i plex.
acl root_dir path_reg ^$|^/$
acl no_plex_header req.hdr_cnt(X-Plex-Device-Name) -i 0
redirect location http://plex.mydomain.tld/web/index.html 301 if no_plex_header root_dir plex
use_backend plex if plex
backend plex
server plex localhost:32400 check
The key difference being the redirect location line which will redirect from / to /web/index.html if the header X-Plex-Device-Name isn't set. The reason you have to check for the header is that it appears that plex uses / for something else.
Note: This config is an example and I haven't tested this at all
Hope that helps.

Answer 3

I want to echo that I used the solution provided by JamesStewy and it worked, with the minor correction;
redirect location http://plex.mydomain.tld/web/index.html code 301 if no_plex_header root_dir plex
At least, that was necessary for me (running haproxy 1.7.2).