Haproxy ssl configuration - install root and intermediate certificate

Question

After to much googling, i finally made my haproxy ssl to works. But now i got problem because root and intermediate certificate is not installed so my ssl don`t have green bar.

My haproxy config

global
      maxconn     4096 
      nbproc      1
      #debug
      daemon
      log         127.0.0.1    local0

  defaults
      mode        http
      option      httplog
      log         global
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms

  frontend unsecured
      bind 192.168.0.1:80
      timeout     client 86400000
      reqadd X-Forwarded-Proto:\ http
      default_backend      www_backend

  frontend  secured
  mode http
   bind 192.168.0.1:443 ssl crt /etc/haproxy/cert.pem
   reqadd X-Forwarded-Proto:\ https
  default_backend www_backend

  backend www_backend
      mode        http
      balance     roundrobin
      #cookie      SERVERID insert indirect nocache
      #option      forwardfor
      server      server1 192.168.0.2:80  weight 1 maxconn 1024 check
      server      server2 192.168.0.2:80  weight 1 maxconn 1024 check

192.168.0.1 is my load balancer ip. /etc/haproxy/cert.pem contain private key and domain certificate eg. www.domain.com

There is another question with ssl configuration, which include bundle.crt. When i contacted my ssl support, they told me i need to install root and intermediate certificate.

From Comodo Documentation, creating bundle is simple as merging their crt, which i made.

But when i try to reconfig my haproxy config as

bind 192.168.0.1:443 ssl crt /etc/haproxy/cert.pem ca-file /path/to/bundle.crt

Im getting error that i cant use that config parameter on bind.

p.s im using 1.5 dev12 version. With latest dev17 version i had problems even starting haproxy as on this post

Answer 1

It looks like you'll need to recompile like so:

make clean
make \
    TARGET="linux26" \
    USE_STATIC_PCRE=1 \
    USE_OPENSSL=1
make install PREFIX="/opt/haproxy"

After that, bind should recognise your crt option. In my case, I used:

bind 0.0.0.0:443 ssl crt /envs/production/ssl/haproxy.pem

I concatenated all ssl files into 1 big file in the order certificate chain, private key. e.g.:

-----BEGIN MY CERTIFICATE-----
-----END MY CERTIFICATE-----
-----BEGIN INTERMEDIATE CERTIFICATE-----
-----END INTERMEDIATE CERTIFICATE-----
-----BEGIN INTERMEDIATE CERTIFICATE-----
-----END INTERMEDIATE CERTIFICATE-----
-----BEGIN ROOT CERTIFICATE-----
-----END ROOT CERTIFICATE-----
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----

Restart, and test with openssl s_client -connect 127.0.0.1:443 -servername www.transloadit.com |head.

It should return the correct certificate information.

Edit: I just found this tutorial via HackerNews: https://serversforhackers.com/c/using-ssl-certificates-with-haproxy. Thought it would be useful to add as it goes into more detail.