haproxy and nextcloud (1 reply)

Hi Guys,

I have three identical Nextcloud servers in operation. A haproxy takes
the round robin. In principle everything works, but only almost.

When im surfing the proxy, im reaching one of the server. However, the
login does not work. I surf the individual server directly, everything
works flawlessly.

I have noticed that when I log on to the proxy and try to log in, it
takes a moment and then I redirected to other nextcloud instance. The
url chances from:

http://SERVER/index.php/login
http://server/index.php/login --> http://SERVER/index.php/login?redirect_url=/index.php/apps/files/
http://server/index.php/login?redirect_url=/index.php/apps/files/

Config:

#####################START#####################

global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
maxconn 4096
tune.ssl.default-dh-param 2048
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private

# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
ssl-default-bind-ciphers
ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3

defaults
log global
mode http
option forwardfor
option http-server-close
option httplog
option dontlognull
stats enable
stats uri /stats
stats realm Haproxy\ Statistics
stats auth user:password!
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http

frontend www-http
bind SERVERROXY:80
reqadd X-Forwarded-Proto:\ http
default_backend www-backend

frontend www-https
bind SERVERROXY:443 ssl crt /etc/ssl/private/SERVER.pem
reqadd X-Forwarded-Proto:\ https
default_backend www-backend

backend www-backend
balance roundrobin
redirect scheme https if !{ ssl_fc }
server nxtcl1 SERVER:80 check
server nxtcl2 SERVER:80 check
server nxtcl3 SERVER:80 check

#####################END#####################

I guess i have to do some header or cookie manipulation. But im really
helpless at this time. I hope you can help me!

Best regards!

Micha