HAProxy Replace URL Headers and Redirect HTTPS to HTTP

haproxy-set-headers-redirect-https

### Create SSL file for HTTPS traffic
mkdir /etc/haproxy/ssl
cat /root/wildcard.example.com.crt /root/wildcard.example.com.key >> /root/wildcard.example.com.pem
mv /root/wildcard.example.com.pem /etc/haproxy/ssl/

### Configure HAProxy.cfg to accept HTTPS, redirect HTTPS to HTTP and replace header to targeted URL
vi /etc/haproxy/haproxy.cfg

#---
#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   https://www.haproxy.org/download/1.8/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon
    
    tune.ssl.default-dh-param 2048
    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

    # utilize system-wide crypto-policies
    ssl-default-bind-ciphers PROFILE=SYSTEM
    ssl-default-server-ciphers PROFILE=SYSTEM

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000


userlist http_users
  user abc insecure-password abc123!!

frontend main
bind 0.0.0.0:6443
default_backend api6443

backend api6443
balance source
mode tcp
server prdcluster-master1.dc.example.co.id prdcluster-master1.dc.example.co.id:6443 check
server prdcluster-master2.dc.example.co.id prdcluster-master2.dc.example.co.id:6443 check
server prdcluster-master3.dc.example.co.id prdcluster-master3.dc.example.co.id:6443 check


frontend main2 
bind 0.0.0.0:22623
default_backend api22623

backend api22623
balance source
mode tcp
server prdcluster-master1.dc.example.co.id prdcluster-master1.dc.example.co.id:22623 check
server prdcluster-master2.dc.example.co.id prdcluster-master2.dc.example.co.id:22623 check
server prdcluster-master3.dc.example.co.id prdcluster-master3.dc.example.co.id:22623 check


frontend main3 
bind 0.0.0.0:443 ssl crt /etc/haproxy/ssl/wildcard.example.co.id.pem
mode http
acl ACL_frontend_abc hdr(host) -i frontend.example.co.id
acl ACL_admin_frontend hdr(host) -i admin-frontend.example.co.id
use_backend router80 if ACL_frontend_abc
use_backend 2router80 if ACL_admin_frontend
default_backend router443
stats uri /haproxy?stats

backend router443
balance source
mode http
server prdcluster-infra1.dc.example.co.id prdcluster-infra1.dc.example.co.id:443 check
server prdcluster-infra2.dc.example.co.id prdcluster-infra2.dc.example.co.id:443 check
server prdcluster-infra3.dc.example.co.id prdcluster-infra3.dc.example.co.id:443 check

frontend main4 
bind 0.0.0.0:80
mode http
redirect scheme https if !{ ssl_fc }
default_backend router80
stats uri /haproxy?stats

backend router80
balance source
http-request replace-header Host frontend.example.co.id app-pp.apps.prdocp.dc.example.co.id 
#http-request replace-header Host frontend.example.co.id blank-page-git-openshift.apps.prdocp.dc.example.co.id
mode http
server prdcluster-infra1.dc.example.co.id prdcluster-infra1.dc.example.co.id:80 check
server prdcluster-infra2.dc.example.co.id prdcluster-infra2.dc.example.co.id:80 check
server prdcluster-infra3.dc.example.co.id prdcluster-infra3.dc.example.co.id:80 check

backend 2router80
balance source
http-request replace-header Host admin-frontend.example.co.id pp-fe-admin.apps.prdocp.dc.example.co.id 
mode http
acl auth_ok http_auth(http_users)
#http-request auth unless auth_ok
http-request auth realm admin-frontend.example.co.id if !auth_ok
#reqadd X-Forwarded-Proto:\ https
server prdcluster-infra1.dc.example.co.id prdcluster-infra1.dc.example.co.id:80 check
server prdcluster-infra2.dc.example.co.id prdcluster-infra2.dc.example.co.id:80 check
server prdcluster-infra3.dc.example.co.id prdcluster-infra3.dc.example.co.id:80 check
#---