Monit

app-admin/monit


Source Repository:Gentoo Portage Tree

Summary: a utility for monitoring and managing daemons or similar programs running on a Unix system.


News

Drobbins

Newsletter, Volume 1

Discussed: ati-drivers, GitHub integration, Funtoo on ARM, GNOME updates, Organizations, and two new devs.
27 January 2015 by Drobbins
Drobbins

New Media Mix-ins

Funtoo Linux now has new media mix-ins. Learn about them and how to use them.
11 January 2015 by Drobbins
Drobbins

The Many Builds of Funtoo Linux

We now have lots of different builds of Funtoo Linux for various CPUs, as well as Hardened, Stable and ARM, and a new UI to browse them. Learn more here.
25 December 2014 by Drobbins
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Monit

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Monit is a utility for managing and monitoring processes, programs, files, directories and filesystems on a UNIX system.

Installation

Emerge

To install Monit:

# emerge monit

Configuration

Config file of monit resides in /etc/monitrc. And there is a item to specify a config directory. Uncomment if needed.

/etc/monitrc - config dir
## It is possible to include additional configuration parts from other files or
## directories.
#
#  include /etc/monit.d/*
#

Users

Users added to the monit or users group will be able to manipulate monit through the web interface.

# gpasswd -a $USER monit
# gpasswd -a $USER users
Warning

passwords can be streamed to monits web interface, disable it all together after it is setup

Important

for security purposes change this entry

/etc/monitrc
allow admin:monit

Boot Services

inittab

Note

this is the preferred method to run monit

/etc/inittab - auto restart monit in case of failure
ca:12345:ctrlaltdel:/sbin/shutdown -r now

 # Run monit in standard runlevels
 mo:2345:respawn:/usr/bin/monit -Ic /etc/monitrc

# Used by /etc/init.d/xdm to control DM startup.

to start monit immediately after changing inittab

# telinit q

OpenRC

Note

prefer inittab method over rc services

To start the service at boot.

# rc-update add monit default

To start the service immediately.

# /etc/init.d/monit start

Monitoring Monit

This hourly cron script will check to make sure monit has not crashed. As this uses pgrep, make sure to not name it monit.

/etc/cron.hourly/moncheck
#!/bin/bash
if ! pgrep monit >/dev/null;then
rc-service monit restart
fi

Pidfile Check

Monit relies upon pid files. For daemons that do not create a pidfile: a work around is needed.

Examples

Auto Restart Mysql

/etc/monitrc - auto restart mysql
check process mysql with pidfile /var/run/mysqld/mysqld.pid
    start program = "/bin/bash -c 'rc-service mysql start'"
    stop program  = "/bin/bash -c 'rc-service mysql stop'"

Web Interface

Navigate to http://localhost:2812/ & login using your edited configuration line or admin / monit if you have not changed it yet.