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Icinga2 | dependencies

Created: 04 August 2018 | Written by vincent | Print | Email | Hits: 5750

Icinga2 | dependencies

Imagine, you have a Switch with 3 NAS on it - the NAS are not often used and Switched off like the Switch itself.
so
the Host-Check to the NAS should only be when Switch is on and hostalive!
the NAS-Service-Check should only be if the NAS ist up = hostalive!

	# cd /etc/icinga2/conf.d
	# mkdir dependence
	# cd dependence
	# vi switch2nas.conf
		object Dependency "switch2nas" { parent_host_name = "swt-03.kozo.ch" child_host_name = "NAS-01.kozo.ch" child_host_name = "NAS-02.kozo.ch" child_host_name = "NAS-03.kozo.ch" states = [ Up ] disable_checks = true disable_notifications = true }
	Go to the Host you wish to add the dependency This will by a Host - Host dependency if the Switch swt-03 is down the NAS-01 get unrechable marked	object Dependency "nas-01-swt-03" { parent_host_name = "swt-03.kozo.ch" child_host_name = "NAS-01.kozo.ch" states = [ Up ] disable_checks = true ignore_soft_states = true disable_notifications = true }







	# icinga2 daemon -C
	# systemctl reload icinga2
	# systemctl status icinga2
	# multitail /var/log/icinga2/icinga2.log

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Quellle/Source:
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- Icinga2 Doc | Dependency
- Icinga2 Doc | Dependencies
- Icinga2 Doc | Apply Dependencies to Hosts and Services
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Category: Icinga

1	# mkdir -p /etc/sysconfig
	# ln -s /usr/lib/icinga2/icinga2 /etc/sysconfig/icinga2
	# apt -y install ruby bundler nodejs npm
	gem install bundler
	gem install dashing


	# cd /usr/share
	# git clone https://github.com/dnsmichi/dashing-icinga2.git
	# cd dashing-icinga2

	bundle install --system

	icinga2 feature enable api

	# vi /etc/icinga2/conf.d/api-users.conf	[...] object ApiUser "dashing" { password = "f6acCfj4k8aC" permissions = [ "status/query", "objects/query/*" ] } [...]
	# systemctl restart icinga2

	# vi /usr/share/dashing-icinga2/config/icinga2.json	[...] { "icinga2": { "api": { "host": "10.147.42.36", "port": 5665, "user": "dashing", "password": "PASSWORD" } }, "icingaweb2": { "url": "http://10.147.42.36/icingaweb2" } } [...]

the place of the Plugin itself	# cd /usr/lib/nagios/pluginsCustom
the plugin - make a servie	# cd /etc/icinga2/conf.d
the service - add to host or hostgroup	# cd /etc/icinga2/zones.d/

create a email Address for this Purpose	This email address is being protected from spambots. You need JavaScript enabled to view it.
check if a MTA (Mail Transfer Agent) is working	echo "Test hier kann viel stehen" \| mail -s "Test mail subject 15" This email address is being protected from spambots. You need JavaScript enabled to view it.
	# vi /etc/icinga2/conf.d/users.conf	add your email address around line 12 on a Default installation







	vars.notification["mail"] = { groups = [ "icingaadmins" ] }

Step	on the Icinga2 Master
	# cd /usr/lib/nagios/pluginsCustom
	# mkdir check_nwc_health
	# cd /usr/lib/nagios/pluginsCustom/check_nwc_health
	# cd /tmp
	# wget https://labs.consol.de/assets/downloads/nagios/check_nwc_health-7.1.tar.gz
	# tar -xvzf check_nwc_health-7.1.tar.gz
	# cd /check_nwc_health-7.1
	./configure
	make
	mv plugins-scripts /usr/lib/nagios/pluginsCustom/check_nwc_health


	object CheckCommand "by_ssh_apt" { import "by_ssh" vars.by_ssh_command = "/usr/lib/nagios/plugins/check_apt -w $by_ssh_apt_warn$ -c $by_ssh_apt_crit$" vars.by_ssh_apt_warn = "75%" vars.by_ssh_apt_crit = "50%" } apply Service "by_ssh_apt" { import "generic-service" host_name = "10.147.42.32" check_command = "by_ssh_apt" vars.by_ssh_logname = "pi" }

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