NaGIOS 4: UBUNTU 20.04 instalasi NaGIOS - Revision history

Onnowpurbo: /* Conclusion */

2020-05-18T05:38:16Z

Conclusion

← Older revision		Revision as of 05:38, 18 May 2020
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	Tunggu beberapa menit, cek kembali ke Nagios Web.		Tunggu beberapa menit, cek kembali ke Nagios Web.

	~~==Conclusion==~~

	~~You’ve installed Nagios on a server and configured it to monitor load average and disk usage of at least one remote machine.~~

	Now that you’re monitoring a host and some of its services, you can start using Nagios to monitor your mission-critical services. You can use Nagios to set up notifications for critical events. For example, you can receive an email when your disk utilization reaches a warning or critical threshold, or a notification when your main website is down. This way you can resolve the situation promptly, or even before a problem occurs.





	==Referensi==		==Referensi==

Onnowpurbo: /* Step 7 — Monitoring Hosts with Nagios */

2020-05-18T05:38:01Z

Step 7 — Monitoring Hosts with Nagios

← Older revision		Revision as of 05:38, 18 May 2020
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	NRPE v4.0.3		NRPE v4.0.3

	==Step 7 — Monitoring Hosts ~~with~~ Nagios==		==Step 7 — Monitoring Hosts dengan Nagios==

	To monitor ~~your hosts with~~ Nagios, ~~you’ll add configuration files for each host specifying what you want to monitor. You can then view those hosts in the Nagios web interface.~~		Tambahkan host yang akan di monitor Nagios, edit

	~~On your Nagios server, create a new configuration file for each of the remote hosts that you want to monitor in~~ /usr/local/nagios/etc/servers/. ~~Replace the highlighted word, monitored_server_host_name with the name of your host:~~		sudo vi /usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg
			sudo vi /usr/local/nagios/etc/servers/192.168.0.155.cfg

	~~sudo nano /usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg~~		Edit file /usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg

	Add the following host definition, replacing the host_name value with your remote hostname, the alias value with a description of the host, and the address value with the private IP address of the remote host:
	/usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg

	define host {		define host {
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	}		}

	~~With this configuration, Nagios will only tell you if the host is up or down. Let’s add some services to~~ monitor.		Tambahkan service yang di monitor

	~~First, add this block to monitor load average:~~

	/usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg		sudo vi /usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg
			sudo vi /usr/local/nagios/etc/servers/192.168.0.155.cfg

	define service {		define service {
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	}		}

	~~The use generic-service directive tells Nagios to inherit the values of a service template called generic-service, which is predefined by Nagios.~~		Cek Disk

	~~Next, add this block to monitor disk usage:~~		sudo vi /usr/local/nagios/etc/servers/your_monitored_server_host_name.cfg
	/usr/local/nagios/etc/servers/~~your_monitored_server_host_name~~.cfg		sudo vi /usr/local/nagios/etc/servers/192.168.0.155.cfg

	define service {		define service {
	use generic-service		use generic-service
	host_name your_monitored_server_host_name		host_name your_monitored_server_host_name
	service_description /dev/~~vda1~~ free space		service_description /dev/sda2 free space
	check_command check_nrpe!~~check_vda1~~		check_command check_nrpe!check_sda2
	}		}

	~~Now save and quit~~. Restart ~~the Nagios service to put any changes into effect:~~
			Save & Quit.

			Restart,

	sudo systemctl restart nagios		sudo systemctl restart nagios

	After several minutes, Nagios will check the new hosts and you’ll see them in the Nagios web interface. Click on the Services link in the left navigation bar to see all of your monitored hosts and services.

	Nagios ~~Services Page~~		Tunggu beberapa menit, cek kembali ke Nagios Web.

	==Conclusion==		==Conclusion==

Onnowpurbo: /* Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor */

2020-05-18T05:30:12Z

Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor

← Older revision		Revision as of 05:30, 18 May 2020
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	Akan keluar,		Akan keluar,

	~~Output~~
	Filesystem Size Used Avail Use% Mounted on		Filesystem Size Used Avail Use% Mounted on
	/dev/~~vda1~~ ~~25G~~ 1.4G ~~23G 6~~% /		/dev/sda2 40G 5.0G 33G 14% /

	Edit /usr/local/nagios/etc/nrpe.cfg		Edit /usr/local/nagios/etc/nrpe.cfg
Line 274:		Line 273:
	allowed_hosts=127.0.0.1,::1,your_nagios_server_private_ip		allowed_hosts=127.0.0.1,::1,your_nagios_server_private_ip
	...		...
	command[~~check_vda1~~]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/~~vda1~~		command[check_sda2]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda2
	...		...

Onnowpurbo: /* Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor */

2020-05-18T05:28:46Z

Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor

← Older revision		Revision as of 05:28, 18 May 2020
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	./configure		./configure
	make		sudo make
	sudo make install		sudo make install

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	curl -L -O https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz		curl -L -O https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz
	tar zxf nrpe-4.0.3.tar.gz		tar zxf nrpe-4.0.3.tar.gz
	cd nrpe-4.0.3		cd /usr/local/src/nrpe-4.0.3

	Configure & Install NRPE:		Configure & Install NRPE:

			cd /usr/local/src/nrpe-4.0.3
	./configure		./configure
	make nrpe		sudo make nrpe
	sudo make install-daemon		sudo make install-daemon
	sudo make install-config		sudo make install-config

Onnowpurbo: /* Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor */

2020-05-18T05:11:00Z

Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor

← Older revision		Revision as of 05:11, 18 May 2020
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	sudo apt update		sudo apt update
	sudo apt install autoconf gcc libmcrypt-dev make libssl-dev wget dc build-essential gettext		sudo apt -y install autoconf gcc libmcrypt-dev make libssl-dev wget dc build-essential gettext

	~~NRPE requires that Nagios Plugins is installed on the remote host. Let’s install this package from source.~~		Download Nagios Plugins,

	~~Find the latest release of Nagios Plugins from the downloads page.~~

	Download Nagios Plugins ~~to your home directory with curl:~~

			sudo su
	cd /usr/local/src		cd /usr/local/src
	curl -L -O https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz		curl -L -O https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz
	tar zxf nagios-plugins-2.3.3.tar.gz		tar zxf nagios-plugins-2.3.3.tar.gz
	cd nagios-plugins-2.3.4		cd /usr/local/src/nagios-plugins-2.3.3

	Compile & install		Compile & install

Onnowpurbo: /* Step 5 — Akses Nagios Web */

2020-05-18T05:06:34Z

Step 5 — Akses Nagios Web

← Older revision		Revision as of 05:06, 18 May 2020
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	password yangkitasetsebelumnya		password yangkitasetsebelumnya

	~~After authenticating~~, ~~you will see the default Nagios home page. Click on the Hosts link in the left navigation bar to see which hosts Nagios is monitoring:~~		Untuk melihat host yang di monitor, kita bisa klik menu

	~~Nagios~~ Hosts ~~Page~~		Current Status > Hosts

	~~As you can see,~~ Nagios ~~is monitoring only “localhost”, or itself.~~		Terlihat default Nagios hanya memonitor localhost

	~~Let’s monitor our other server with Nagios,~~

	==Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor==		==Step 6 — Installing Nagios Plugin & NRPE Daemon di Server yang di monitor==

Onnowpurbo: /* Step 4 — Konfigurasi Nagios server */

2020-05-18T05:03:31Z

Step 4 — Konfigurasi Nagios server

← Older revision		Revision as of 05:03, 18 May 2020
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	sudo vi /usr/local/nagios/etc/nagios.cfg		sudo vi /usr/local/nagios/etc/nagios.cfg

	Temukan,		Temukan di /usr/local/nagios/etc/nagios.cfg
	/usr/local/nagios/etc/nagios.cfg

	...		...
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	Buat directory tersebut. Ini akan menyimpan file konfigurasi untuk setiap server yang kita monitor,		Buat directory tersebut. Ini akan menyimpan file konfigurasi untuk setiap server yang kita monitor,

	sudo mkdir -y /usr/local/nagios/etc/servers		sudo mkdir -p /usr/local/nagios/etc/servers

	'''Edit contact'''		'''Edit contact'''
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	sudo vi /usr/local/nagios/etc/objects/contacts.cfg		sudo vi /usr/local/nagios/etc/objects/contacts.cfg

	Ubah email dengan email kita,		Ubah email dengan email kita di /usr/local/nagios/etc/objects/contacts.cfg

	/usr/local/nagios/etc/objects/contacts.cfg

	...		...
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	sudo vu /usr/local/nagios/etc/objects/commands.cfg		sudo vi /usr/local/nagios/etc/objects/commands.cfg

	Tambahkan,		Tambahkan di /usr/local/nagios/etc/objects/commands.cfg
	/usr/local/nagios/etc/objects/commands.cfg

	...		...

Onnowpurbo: /* Step 3 — Installing the check_nrpe Plugin */

2020-05-18T04:58:27Z

Step 3 — Installing the check_nrpe Plugin

← Older revision		Revision as of 04:58, 18 May 2020
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	* check_nrpe plugin (di admin console) yang digunakan di Nagios server.		* check_nrpe plugin (di admin console) yang digunakan di Nagios server.
	* NRPE daemon, di remote host dan mengirimkan data ke Nagios server.		* NRPE daemon, di remote host dan mengirimkan data ke Nagios server.

			Optional untuk mencari kesiapan libssl-dev

			apt -y install apt-file
			apt-file update
			apt-file search libssl \| grep libssl-dev
			apt-file search libssl \| grep /usr/lib/x86_64-linux-gnu
			apt-file search ssl \| grep /usr/bin/openssl

			Install libssl-dev

			apt -y install libssl-dev

	Download,		Download,

			sudo su
	cd /usr/local/src		cd /usr/local/src
	curl -L -O https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz		curl -L -O https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz
	tar zxf nrpe-4.0.3.tar.gz		tar zxf nrpe-4.0.3.tar.gz
	cd nrpe-4.0.3		cd /usr/local/src/nrpe-4.0.3

	Konfigurasi dan install check_nrpe plugin:		Konfigurasi dan install check_nrpe plugin:

	./configure		sudo su
	make check_nrpe		cd /usr/local/src/nrpe-4.0.3
			./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib/x86_64-linux-gnu
			sudo make check_nrpe
	sudo make install-plugin		sudo make install-plugin

Onnowpurbo: /* Step 2 — Installing Nagios Plugins */

2020-05-18T04:47:21Z

Step 2 — Installing Nagios Plugins

← Older revision		Revision as of 04:47, 18 May 2020
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	Kita perlu menginstalasi Nagios plugin, ada sekitar 50 plugin untuk memonitor berbagai hal seperti uptime, disk usage, swap usage, NTP dll. Download plugin,		Kita perlu menginstalasi Nagios plugin, ada sekitar 50 plugin untuk memonitor berbagai hal seperti uptime, disk usage, swap usage, NTP dll. Download plugin,

			sudo su
	cd /usr/local/src		cd /usr/local/src
	curl -L -O https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz		curl -L -O https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz
	tar zxf nagios-plugins-2.3.3.tar.gz		tar zxf nagios-plugins-2.3.3.tar.gz
	cd nagios-plugins-2.3.3		cd /usr/local/src/nagios-plugins-2.3.3


	Konfigurasi & instalasi:		Konfigurasi & instalasi:

			cd /usr/local/src/nagios-plugins-2.3.3
	./configure		./configure
	make		sudo make
	sudo make install		sudo make install

Onnowpurbo: /* Step 1 — Installing Nagios 4 */

2020-05-18T04:44:19Z

Step 1 — Installing Nagios 4

@@ Line 32: / Line 32: @@
   cd /usr/local/src/
   wget -O nagioscore.tar.gz https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.6.tar.gz
   tar xzf nagioscore.tar.gz
-  cd nagioscore-nagios-4.4.6
+  cd /usr/local/src/nagioscore-nagios-4.4.6/
 Run script & specify Apache config directory:
 Catatan: jika kita menggunakan email server postfix, ada baiknya di tambah --with-mail=/usr/sbin/sendmail
 Compile & install Nagios,
-  make all
+  cd /usr/local/src/nagioscore-nagios-4.4.6/
   sudo make install-groups-users
   sudo make install
@@ Line 93: / Line 61: @@
   sudo usermod -a -G nagios www-data
-Konfigurasi untuk user nagiosadmin (untuk user lain, nagiosadmin bisa di ganti)
+Konfigurasi & masukan _PASSWORD_ untuk user nagiosadmin (untuk user lain, nagiosadmin bisa di ganti)
   sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin