You got that fancy new Drupal website ready to go live! Now what? Well, if this is a production site, it’s probably time to start planning how your going to monitor it. In this post, we’re going to talk about the complete rewrite to icinga (a nagios fork), icinga2! This blog post will assume systemd is already your init daemon.
Lets get started. First your going to need to install icinga2 on your monitoring server. This is pretty straight forward if your using debian or ubuntu. We’re going to assume your using debian wheezy in this example:
wget -O - http://debmon.org/debmon/repo.key 2>/dev/null | sudo apt-key add - echo 'deb http://debmon.org/debmon debmon-wheezy main' > /etc/apt/sources.list.d/debmon.list apt-get update apt-get install icinga2
This step will be done on all your clients and your server. We need to install some more dependencies on the server to setup the database:
sudo apt-get -y install python-software-properties sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0xcbcb082a1bb943db sudo add-apt-repository 'deb http://mirror.jmu.edu/pub/mariadb/repo/10.1/debian wheezy main' sudo apt-get update sudo apt-get install mariadb-server sudo apt-get install icinga2-ido-mysql
The above will prompt you to setup root credentials and credentials for icinga2 to the IDO MySQL database. Next step is to enable the feature and restart the service:
sudo icinga2 feature enable ido-mysql sudo systemctl restart icinga2.service
At this point, the server is setup and able to do checks and store results in the database, but you probably are going to want a web interface to interact with icinga2, so lets set it up:
sudo apt-get install icingaweb2 apache2 php5 php5-cli
Make sure your password and username for connecting to the icinga_ido db is the
same as the one you setup prior in
The rest of the configuration for icingaweb2 is in the browser, but we need a token, so run:
sudo icingacli setup token create
Copy that token for later setup steps.
At this point we have an icinga2 server monitoring itself, but we still need to setup notifications and setup other servers to be monitored by it.