Using noVNC in the current version of Abiquo
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Replacing TightVNC applet with noVNC in the client-premium webapp
Download the noVNC distribution package from: http://kanaka.github.com/noVNC
Note that this is the same package we used for the websockify
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You can run multple websockify proxies to spread load and achieve high availability of the remote console viewers. Follow the instructions above on "Replacing TightVNC with noVNC in Abiquo" to get several proxies running. For the sake of simplicity this document refers to 2 backend servers running the websockify proxy and one load balancer using HAProxy.
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Note that if you use a balancer for your websockify proxies, you need to edit the tightvnc.html file in client-premium webapp to point to the IP and port of the balancer. |
Installing HAProxy
You will need the gcc compiler and make to compile HAProxy.
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Once haproxy is installed, create its config file, /etc/haproxy.cfg a directory for haproxy under /etc:
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# mkdir /etc/haproxy |
And create its config file, /etc/haproxy/haproxy.conf with the following contents:
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global log 127.0.0.1 local0 frontend public bind *:41338 timeout client 3600s default_backend ws backend ws balance source timeout queue 3600s timeout server 3600s timeout connect 3600s server websockify1 192.168.2.218:41337 weight 1 maxconn 1024 check server websockify2 192.168.2.219:41337 weight 1 maxconn 1024 check listen stats bind *:80 mode http stats enable stats uri /admin?stats stats refresh 5s stats auth admin:xabiquo timeout client 3600s timeout server 3600s timeout connect 3600s |
Make sure you change IP addresses in each server line to match the IP addresses of your websockify proxies. To activate logging, create /etc/rsyslog.d/20-you need rsyslog package installed:
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# yum -y install rsyslog |
Then create /etc/rsyslog.d/20-haproxy.conf file with the following content:
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To run haproxy as a daemon, download the attached create an haproxy script and copy it to under /etc/init.d/ directory. Change permissions to 755, and you can
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# vi /etc/init.d/haproxy |
And add the following content:
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#!/bin/sh
#
# custom haproxy init.d script, by Mattias Geniar <mattias@nucleus.be>
#
# haproxy starting and stopping the haproxy load balancer
#
# chkconfig: 345 55 45
# description: haproxy is a TCP loadbalancer
# probe: true
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -f /usr/local/sbin/haproxy ] || exit 0
[ -f /etc/haproxy/haproxy.conf ] || exit 0
# Define our actions
checkconfig() {
# Check the config file for errors
/usr/local/sbin/haproxy -c -q -f /etc/haproxy/haproxy.conf
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
# We're OK!
return 0
}
start() {
# Check config
/usr/local/sbin/haproxy -c -q -f /etc/haproxy/haproxy.conf
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
echo -n "Starting HAProxy: "
daemon /usr/local/sbin/haproxy -D -f /etc/haproxy/haproxy.conf -p /var/run/haproxy.pid
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/haproxy
return $RETVAL
}
stop() {
echo -n "Shutting down HAProxy: "
killproc haproxy -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/haproxy
[ $RETVAL -eq 0 ] && rm -f /var/run/haproxy.pid
return $RETVAL
}
restart() {
/usr/local/sbin/haproxy -c -q -f /etc/haproxy/haproxy.conf
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
stop
start
}
check() {
/usr/local/sbin/haproxy -c -q -V -f /etc/haproxy/haproxy.conf
}
rhstatus() {
status haproxy
}
reload() {
/usr/local/sbin/haproxy -c -q -f /etc/haproxy/haproxy.conf
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
echo -n "Reloading HAProxy config: "
/usr/local/sbin/haproxy -f /etc/haproxy/haproxy.conf -p /var/run/haproxy.pid -sf $(cat /var/run/haproxy.pid)
success $"Reloading HAProxy config: "
echo
}
# Possible parameters
case "$1" in
start)
start
;;
stop)
stop
;;
status)
rhstatus
;;
restart)
restart
;;
reload)
reload
;;
checkconfig)
check
;;
*)
echo "Usage: haproxy {start|stop|status|restart|reload|checkconfig}"
exit 1
esac
exit 0
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Give the script execution permissions:
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# chmod u+x /etc/init.d/haproxy |
And you will be able to perform the following commands:
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# service haproxy {start|stop|restart|reload|condrestart|status|check} |
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