bitbadger.solutions-blog-theme/source/_posts/2010/mono-fastcgi-startup-script.md

layout	title	author	date	categories	tags	summary
post	Mono / FastCGI Startup Script	Daniel	2010-09-03 19:28:15	Linux Programming .NET Mono Web Servers	badgerports config fastcgi mono script	A script that allows Mono web applications to be defined and started the way Apache and nginx enable and disable their sites

We've begun running Mono on some DJS Consulting servers to enable us to support the .NET environment, in addition to the PHP environment most of our other applications use. While Ubuntu has nice packages (and Badgerports even brings brought them up to the latest release), one thing that we were missing was a "conf.d"-type of configuration; my "/applications=" clause of the command was getting really, really long. We decided to see if we could create something similar to Apache / Nginx's sites-available/sites-enabled paradigm, and we have succeeded!

To begin, you'll need to create the directories /etc/mono/fcgi/apps-available and /etc/mono/fcgi/apps-enabled. These directories will hold files that will be used define applications. The intent of these directories is to put the actual files in apps-available, then symlink the ones that are enabled from apps-enabled. These files have no name restrictions, but do not put an extra newline character in them. The script will concatenate the contents of that file to create the MONO_FCGI_APPLICATIONS environment variable, which tells the server what applications exist. (The syntax is the same as that for the "/applications=" clause - [domain]:[URL path]:[filesystem path].) Here's how the site you're reading now is configured (from the file djs-consulting.com.techblog.conf)...

{% codeblock djs-consulting.com.techblog.conf lang:shell %} techblog.djs-consulting.com:/:/path/to/install/base/for/this/site {% endcodeblock %}

Finally, what brings it all together is a shell script. This should be named "monoserve" and placed in /etc/init.d. (This borrows heavily from this script a script we found online, which we used until we wrote this one.) Note the group of variables surrounded by the "make changes here" notes - these are the values that are used in starting the server. They are at the top so that you can easily modify this for your own needs.

{% codeblock monoserve lang:shell %} #/bin/bash

BEGIN INIT INFO

Provides: monoserve.sh

Required-Start: $local_fs $syslog $remote_fs

Required-Stop: $local_fs $syslog $remote_fs

Default-Start: 2 3 4 5

Default-Stop: 0 1 6

Short-Description: Start FastCGI Mono server with hosts

END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/bin/mono NAME=monoserver DESC=monoserver

Begin -- MAKE CHANGES HERE --

PROGRAM=fastcgi-mono-server2 # The program which will be started ADDRESS=127.0.0.1 # The address on which the server will listen PORT=9001 # The port on which the server will listen USER=www-data # The user under which the process will run GROUP=$USER # The group under which the process will run

End -- MAKE CHANGES HERE --

Determine the environment

MONOSERVER=$(which $PROGRAM) MONOSERVER_PID="" FCGI_CONFIG_DIR=/etc/mono/fcgi/apps-enabled

Start up the Mono server

start_up() { get_pid if [ -z "$MONOSERVER_PID" ]; then echo "Configured Applications" echo "-----------------------" # Construct the application list if the configuration directory exists if [ -d $FCGI_CONFIG_DIR ]; then MONO_FCGI_APPLICATIONS="" for file in $( ls $FCGI_CONFIG_DIR ); do if [ "$MONO_FCGI_APPLICATIONS" != "" ]; then MONO_FCGI_APPLICATIONS=$MONO_FCGI_APPLICATIONS, fi MONO_FCGI_APPLICATIONS=$MONO_FCGI_APPLICATIONScat $FCGI_CONFIG_DIR/$file done export MONO_FCGI_APPLICATIONS echo -e ${MONO_FCGI_APPLICATIONS//,/"\n"} else echo "None (config directory $FCGI_CONFIG_DIR not found)" fi echo

    # Start the server
    start-stop-daemon -S -c $USER:$GROUP -x $MONOSERVER -- /socket=tcp:$ADDRESS:$PORT &
    echo "Mono FastCGI Server $PROGRAM started as $USER on $ADDRESS:$PORT"
else
    echo "Mono FastCGI Server is already running - PID $MONOSERVER_PID"
fi

}

Shut down the Mono server

shut_down() { get_pid if [ -n "$MONOSERVER_PID" ]; then kill $MONOSERVER_PID echo "Mono FastCGI Server stopped" else echo "Mono FastCGI Server is not running" fi }

Refresh the PID

get_pid() { MONOSERVER_PID=$(ps auxf | grep $PROGRAM.exe | grep -v grep | awk '{print $2}') }

case "$1" in start) start_up ;; stop) shut_down ;; restart|force-reload) shut_down start_up ;; status) get_pid if [ -z "$MONOSERVER_PID" ]; then echo "Mono FastCGI Server is not running" else echo "Mono FastCGI Server is running - PID $MONOSERVER_PID" fi ;; *) echo "Usage: monoserve (start|stop|restart|force-reload|status)" ;; esac

exit 0 {% endcodeblock %}

This needs to be owned by root and be executable (chmod +x monoserve). You can use update-rc.d monoserve defaults to set this to start at boot.