Well we have created a PHP daemon.One major issue with all daemon is that some time it got killed with out any reason.Here we have a solution for monitoring the daemon with a utility called monit.monit is a utility for managing and monitoring, processes, files, directories and devices on a Unix system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. E.g. monit can start a process if it does not run, restart a process if it does not respond and stop a process if it uses to much resources. You may use monit to monitor files, directories and devices for changes, such as timestamp changes, checksum changes or size changes.
For doing it install the utility first

sudo apt-get install monit

We have to edit some configuration file to make the monit work.
Edit sudo vim /etc/default/monit

Set startup=1 from 0

Edit sudo vim /etc/monit/monitrc
This is the file where we specify what to monit
Uncomment

set daemon  60 #will check the daemon every 1 minute
set httpd port 2812 and
 use address localhost  # only accept connection from localhost
 allow localhost        # allow localhost to connect to the server and
#specifying the program for monitor
check process php with pidfile "/var/run/process.pid"
start = "/usr/bin/php /var/www/voicealerts/process.php"
stop = "/usr/bin/php /var/www/voicealerts/process.php"

Line 1 starts a process service entry. It contains the keyword check and a descriptive name for he process to monitor, in this case php. Monit also require the process pidfile to be stated.
If you want monit to start, stop or restart the process you must submit a start and stop program.
Line 2-3 defines those programs for this process
Write and quite the file and check the syntax is ok with command

sudo monit -t

start monit deamon by

sudo /etc/init.d/monit start

start the files specified in the monitrc by

sudo monit start all

check the status of our daemon

sudo monit status

This is a sample configuration monitors the PHP daemon process mentioned in the above post.

Tags: Monitoring a daemon, Monitoring a PHP daemon