Nagios - Revision history

Piousbox: /* Add a new custom check */

2022-04-02T19:19:45Z

‎Add a new custom check

Piousbox at 19:19, 2 April 2022

2022-04-02T19:19:23Z

Piousbox at 02:56, 19 November 2018

2018-11-19T02:56:26Z

Piousbox at 00:05, 7 September 2017

2017-09-07T00:05:19Z

Piousbox: /* Nagios Config */

2017-05-22T16:46:16Z

‎Nagios Config

Piousbox: /* Nagios Config */

2017-05-22T16:45:16Z

‎Nagios Config

Piousbox: /* Nagios Config */

2017-05-22T16:38:56Z

‎Nagios Config

Piousbox: /* Nagios Config */

2017-05-22T16:35:57Z

‎Nagios Config

Piousbox: /* Directory Structure Server */

2017-05-22T16:34:16Z

‎Directory Structure Server

Piousbox: /* Directory Structure Client */

2017-05-22T16:28:34Z

‎Directory Structure Client

@@ Line 47: / Line 47: @@
 From: https://geekpeek.net/could-not-complete-ssl-handshake/
-== Add a new custom check ==
+= Add a new custom check =
 Implement a new custom check:
 * assume nagios3 server is already installed

← Older revision		Revision as of 19:19, 2 April 2022
Line 46:		Line 46:
	==== CHECK_NRPE: Error – Could not complete SSL handshake ====		==== CHECK_NRPE: Error – Could not complete SSL handshake ====
	From: https://geekpeek.net/could-not-complete-ssl-handshake/		From: https://geekpeek.net/could-not-complete-ssl-handshake/
		+
		+	== Add a new custom check ==
		+	Implement a new custom check:
		+	* assume nagios3 server is already installed
		+	* install nagios-nrpe-server on the client (sudo apt-get install nagios-nrpe-server -y)
		+	* make sure allowed hosts are correct, as per https://geekpeek.net/could-not-complete-ssl-handshake/ (/etc/nagios/nrpe.conf)
		+	* create the entry for the command on client in /etc/nagios/nrpe.conf (command[check_mongod]=/usr/lib/nagios/plugins/check_mongod)
		+	* create /usr/lib/nagios/plugins/check_mongod
		+	* restart nagios-nrpe-server
		+	* check that you can connect on the server: ( root@utils:/usr/lib/nagios/plugins# ./check_nrpe -H 10.138.224.158 -c check_mongod )
		+	* add this check to this host
		+	<pre>
		+	root@utils:/etc/nagios3/conf.d# cat dev_mongo2.cfg \| grep mongod -B 3 -A 7
		+	define service{
		+	use generic-service
		+	host_name dev-mongo2.operaevent
		+	service_description mongod service
		+	check_command check_mongod
		+	}
		+	</pre>
		+	* restart server ( root@utils:/etc/nagios3/conf.d# sudo service nagios3 restart )
		+
		+	== Notes ==
		+
		+	https://geekpeek.net/could-not-complete-ssl-handshake/
		+
		+	verify configuration:
		+	nagios3 -v /etc/nagios3/nagios.cfg
		+
		+	on client:
		+	sudo service nagios-nrpe-server restart
		+
		+	on server:
		+	sudo service nagios3 restart

← Older revision		Revision as of 02:56, 19 November 2018
Line 1:		Line 1:
		+	== Install Server ==
		+	From: https://help.ubuntu.com/lts/serverguide/nagios.html.en
		+
		+	sudo apt install nagios3 nagios-nrpe-plugin
		+
		+
	== Install Client ==		== Install Client ==
	apt-get install nagios-nrpe-server nagios-plugins-basic -y		apt-get install nagios-nrpe-server nagios-plugins-basic -y

← Older revision		Revision as of 00:05, 7 September 2017
Line 1:		Line 1:
		+	== Install Client ==
		+	apt-get install nagios-nrpe-server nagios-plugins-basic -y
		+
	== Client Important Files ==		== Client Important Files ==
	/etc/nagios/nrpe.cfg <- allowed_hosts of server goes here		/etc/nagios/nrpe.cfg <- allowed_hosts of server goes here

@@ Line 8: / Line 8: @@
 == Nagios Config ==
-* make sure IPs are allowed for communicatin
+* make sure IPs, ports, security groups allow communication
-* make sure ports are allowed for communication
-* # client: put the custom plugin in /usr/lib/nagios/plugins/echo_ok3 ## optional, trash
 * client: in /etc/nagios/nrpe.cfg:
-** allowed_hosts <should include the server ip>
+ allowed_hosts <should include the server ip>
-**  command[echo_ok3]=/usr/lib/nagios/plugins/echo_ok3
+  command[echo_ok3]=/usr/lib/nagios/plugins/echo_ok3
 * client: restart service
-**  # /usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d ## use next oneliner
+  sudo kill -9 `ps aux | grep nr | grep -v color | awk '{print $2}'` ; /usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d
-**  sudo kill -9 `ps aux | grep nr | grep -v color | awk '{print $2}'` ; /usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d
 * server:
   define command {

@@ Line 3: / Line 3: @@
   /usr/lib/nagios/plugins 	<- specific checks go here
-== Directory Structure Server ==
+== Server Important Files==
- /usr/share/nagios/htdocs
+  /usr/lib/nagios/plugins		<- nothing important here, actually
-  /usr/lib/nagios/plugins		<-
+  /etc/nagios3/config.d                  <- everything goes here
-  /var/chef/backup/etc/nagios
- /var/chef/cache/cookbooks/nagios
- /etc/nagios
- /run/nagios3
- /usr/share/doc/nagios3
- /usr/share/nagios3
- /usr/share/lintian/overrides/nagios3
- /etc/init.d/nagios3
- /etc/nagios3
 == Nagios Config ==