Monit

app-admin/monit


Source Repository:Repository:Gentoo Portage Tree


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


News

Drobbins

IP Space Migration Continues

All Funtoo user containers in the 8.28 IP space will be moving into our new IP space (172.97) over the next few days. If you have DNS set up -- be sure to watch your container and update to the new IP! container.host.funtoo.org DNS will be updated after the move.
2015-08-27 by Drobbins
Drobbins

Funtoo Hosting IP Move

Funtoo user containers with IPs in the 72.18.x.x range will be gradually migrating to new IP addresses this week. If you have DNS entries for your containers, please be aware that your DNS will need to be updated.
2015-08-11 by Drobbins
Drobbins

New ARM Stages

New ARM Stages, built with a new toolchain, are now hitting mirrors. Existing ARM users should re-install using these stages (dated Aug 3, 2015 or later,) rather than upgrade using emerge.
2015-08-06 by Drobbins
More...

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 Package: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.