Setting up HAProxy for OpenStack SSL

HAProxy setup steps

1. Install HA Proxy package

    #> yum install haproxy

2. Generate the self-signed cert

    #> mkdir -p /etc/pki/haproxy
    #> umask 077 && openssl genrsa -out /etc/pki/haproxy/haproxy.key 1024
    #> umask 022 && openssl req -key /etc/pki/haproxy/haproxy.key \
       -out /etc/pki/haproxy/haproxy.crt \
       -subj "/CN=qeblade25.rhq.lab.eng.bos.redhat.com/" \
       -new -x509 -days 365 -extensions usr_cert
    #> cat /etc/pki/haproxy/haproxy.crt /etc/pki/haproxy/haproxy.key > /etc/pki/haproxy/haproxy.pem

3. Setup HA Proxy (configures proxies for keystone and nova)
Note:  the ports used here are for example only ... afaik, there's no "default" keystone ssl port

    #> cat /etc/haproxy/haproxy.cfg
    #---------------------------------------------------------------------
    # Example configuration for a possible web application.  See the
    # full configuration options online.
    #
    #   http://haproxy.1wt.eu/download/1.4/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
        #
        daemon
        maxconn     1000
        user        haproxy
        group       haproxy
        log         127.0.0.1:514 local0
        tune.ssl.default-dh-param 2048

    #---------------------------------------------------------------------
    # common defaults that all the 'listen' and 'backend' sections will
    # use if not designated in their block
    #---------------------------------------------------------------------
    defaults
        log                     global
        option                  dontlognull
        timeout connect         3s
        timeout client          10s
        timeout server          10s

    #---------------------------------------------------------------------
    # front-end for keystone-proxy with ssl termination
    #---------------------------------------------------------------------
    frontend keystone-proxy *:5443
        mode            http
        bind            10.16.4.46:5443 ssl crt /etc/pki/haproxy/haproxy.pem
        default_backend keystone-app

    #---------------------------------------------------------------------
    # back-end for keystone-app
    #---------------------------------------------------------------------
    backend keystone-app
        mode   http
        server keystone 10.16.4.46:5000 check


    #---------------------------------------------------------------------
    # front-end for nova-proxy with ssl termination
    #---------------------------------------------------------------------
    frontend nova-proxy *:8474
        mode            http
        bind            10.16.4.46:8474 ssl crt /etc/pki/haproxy/haproxy.pem
        default_backend nova-app

    #---------------------------------------------------------------------
    # back-end for nova-app
    #---------------------------------------------------------------------
    backend nova-app
        mode   http
        server nova 10.16.4.46:8774 check

4. Setup firewall rules (allow access to SSL ports for keystone and nova)
Note:  the ports used here are for example only ... afaik, there's no "default" keystone ssl port

    #> iptables -I INPUT 5 -p tcp --dport 5443 -j ACCEPT
    #> iptables -I INPUT 5 -p tcp --dport 8474 -j ACCEPT

5. Update the nova service endpoint so keystone indicates the correct (proxied) endpoint

    The only way I've seen to do this is directly in the mysql database.  You can drop and re-add endpoints, but you cannot update them, from what I can tell from the keystone CLI/API.

6. Start haproxy

    #> service haproxy start

Troubleshooting

If the haproxy service fails to start, review the error messages.  It's possible that this bug is standing in the way  https://bugzilla.redhat.com/show_bug.cgi?id=1131188.