#M monit code

Add this to /etc/monitrc:Ĭheck process apache with pidfile /var/run/httpd.pid Such a high percentage would probably indicate a problem with the logs, which might be cleared by restarting the server. A percentage is used rather than a fixed number to let the monitoring 'scale' with the rise and fall in the number of Apache processes as the server load changes.Įxample 1: You would like to restart the server if 60% or more Apache child precesses are simultaneously writing to the logs. This is the percentage of Apache child processes which you allow in a particular state before action is taken. A problem is defined by using a percentage limit for the quantity monitored. Once mod_status is giving its output you can ask Monit to read this information, and let you know if there is a problem. To access the status information the apache configuration file (often at /etc/httpd/nf or /usr/apache/conf/nf) should include these lines within one of your hosts or virtual hosts: It should therefore be combined with other monitoring to cover the case of a complete server or connection failure.The tests will all work with the ExtendedStatus directive On or Off.Īpache normally compiles with mod_status enabled and built in. Important: Since these tests uses mod_status, it depends on the Apache server being able to respond.

#M monit code

However, following development of the code it became clear that many other aspects of Apache can be monitored, whether it is in a chroot jail or not. The original idea was to use Monit to observe Apache from outside the chroot, and take action if it spotted a problem. The server was in a chroot jail, and this prevented the piped logging process from re-starting itself.

The original development of the Apache-Status code was in response to a failure of Apache's piped logging process which caused a server to lock up. It does this through Apache's mod_status, which needs to be available to use these special Monit functions. while the server is still working) if something is going wrong. The Monit 'apache-status' protocol provides a way to monitor the internal performance of an Apache web server, and to take action early (i.e.