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Installing and configuring HAProxy on CentOS 7

1. Install dependencies

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yum install openssl-devel pcre-devel make gcc -y


2. Download HAproxy

Download the stable version of HAproxy, for instance to the /tmp directory

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cd /tmp
wget http://www.haproxy.org/download/1.7/src/haproxy-1.7.2.tar.gz -O- | tar -zx


3. Go to the unpacked directory with sources

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сd haproxy-*


4. Run make

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make TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_CRYPT_H=1 USE_LIBCRYPT=1
make install


5. Create a user named haproxy

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useradd haproxy


6. Create a directory named /var/lib/haproxy/

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mkdir /var/lib/haproxy/


7. Create a .pem file from certificates imported to the WCS server

Examples of certificates from StartSSL
test.flashphoner.com.crt - certificate file
test.flashphoner.com.key - private key file
ca.pem - root certificate
sub.class2.server.ca.pem - intermediate certificate

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cat test.flashphoner.com.crt ca.pem sub.class2.server.ca.pem test.flashphoner.com.key | tee test.flashphoner.com.pem


8. Create the configuration file /etc/haproxy/haproxy.cfg with the following contents:

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#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option tcplog
option http-server-close
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 5s
timeout check 10s
maxconn 3000
http-reuse always
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend secure
bind SET_YOUR_IP:443 ssl crt /path/to/your/certificate/cert.pem
acl is_websocket hdr(Upgrade) -i WebSocket
acl is_websocket hdr(Sec-WebSocket-Key) -m found
use_backend ws_app if is_websocket
use_backend web_app if { req.proto_http }
default_backend static
backend static
server static 127.0.0.1:8888
# websocket
backend ws_app
server app1 127.0.0.1:8080
# web content
backend web_app
server app1 127.0.0.1:8888 ssl verify none


In the line

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bind SET_YOUR_IP:443 ssl crt /path/to/your/certificate/cert.pem


replace
- SET_YOUR_IP - to the public IP of the WCS server
- /path/to/your/certificate/cert.pem - to the .pem file created from certificates imported to the WCS server

9. Create the init file /etc/init.d/haproxy with the following contents:

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#!/bin/bash
#
# chkconfig: - 85 15
# description: HA-Proxy is a TCP/HTTP reverse proxy which is particularly suited \
# for high availability environments.
# processname: haproxy
# config: /etc/haproxy/haproxy.cfg
# pidfile: /var/run/haproxy.pid
# Script Author: Simon Matter <simon.matter@invoca.ch>
# Version: 2004060600
# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
else
exit 0
fi
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
# This is our service name
BASENAME=`basename $0`
if [ -L $0 ]; then
BASENAME=`find $0 -name $BASENAME -printf %l`
BASENAME=`basename $BASENAME`
fi
BIN=/usr/local/sbin/$BASENAME
CFG=/etc/$BASENAME/$BASENAME.cfg
[ -f $CFG ] || exit 1
PIDFILE=/var/run/$BASENAME.pid
LOCKFILE=/var/lock/subsys/$BASENAME
RETVAL=0
start() {
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
echo -n "Starting $BASENAME: "
daemon $BIN -D -f $CFG -p $PIDFILE
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $LOCKFILE
return $RETVAL
}
stop() {
echo -n "Shutting down $BASENAME: "
killproc $BASENAME -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCKFILE
[ $RETVAL -eq 0 ] && rm -f $PIDFILE
return $RETVAL
}
restart() {
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
stop
start
}
reload() {
if ! [ -s $PIDFILE ]; then
return 0
fi
quiet_check
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with '$BASENAME check'."
return 1
fi
$BIN -D -f $CFG -p $PIDFILE -sf $(cat $PIDFILE)
}
check() {
$BIN -c -q -V -f $CFG
}
quiet_check() {
$BIN -c -q -f $CFG
}
rhstatus() {
status $BASENAME
}
condrestart() {
[ -e $LOCKFILE ] && restart || :
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
reload
;;
condrestart)
condrestart
;;
status)
rhstatus
;;
check)
check
;;
*)
echo $"Usage: $BASENAME {start|stop|restart|reload|condrestart|status|check}"
exit 1
esac
exit $?


10. Add haproxy to autostart

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chmod a+x /etc/init.d/haproxy
chkconfig --add haproxy
chkconfig haproxy on


11. Start haproxy

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service haproxy start


Verifying HAProxy

1. Make sure haproxy listens to the port 443

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netstat -antp | grep 443


Example of the result of executing the command:

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tcp 0 0 192.168.1.1:443 0.0.0.0:* LISTEN 24083/haproxy


If the port is occupied by another service, terminate the corresponding process and restart haproxy:

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service haproxy restart


2. Make sure the certificates used to create the .pem file soecified in haproxy.cfg are imported to the WCS server

You can read more about certificates for the WCS server here: Websocket SSL

3. open the WCS server control panel via HTTPS

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https://<domain name or IP of the WCS server>:8888/dashboard.xhtml

4. Verify operation of the demo example with the port 443

For instance, in the Streamer demo example change the wss port to 443 and start publishing the stream.