What is host groups in Nagios?

Posted on by Muna Meyer

What is host groups in Nagios?

Host groups, as the name suggests groups hosts and can be used to assign services. User can become a member of the groups through the group definition itself and the members attribute as we can see from the definition below that just has the localhost as a member. Multiple host names should be separated by commas.

How do I create a host group in Nagios?

How to do it…

  1. Create a new file called /usr/local/nagios/etc/objects/hostgroups.cfg , if it doesn’t already exist:
  2. Write the following code into the new file, substituting the names in bold to suit your own layout:
  3. Move a directory up and then edit the nagios.cfg file:
  4. Add this line to the end of the file:

What is host group in Linux?

hostgroup (5) – Linux Man Pages A host group entry is used to merge host names to groups. Each host group entry file defines one group. Inside a group definition file you can also reference groups. These groups are called subgroups. A subgroup is referenced by the sign “@” as first character of the name.

How do I add multiple hosts in Nagios?

You need to a host definition and service definition for each host you want to monitor. To add an host just copy/paste an existent host definition and service definition (PING in this case), changing the host_name, alias and address.

Why do we need to configure host groups in Nagios?

Nagios create a host group Nagios is an open source monitoring system and we can monitor devices running on Linux and Windows. And, when you have a considerable number of servers, it will be difficult to track. That’s where host group is useful.

What does Nagios stand for?

Nagios is a recursive acronym: “Nagios Ain’t Gonna Insist On Sainthood” – “sainthood” makes reference to the original name NetSaint, which changed in response to a legal challenge by owners of a similar trademark. “Agios” (or “hagios”) also transliterates the Greek word άγιος, which means “saint”.

How do I add a host to Nagios core for monitoring?

Open main Nagios configuration file and insert the line, cfg_dir=/usr/local/nagios/etc/objects/kifarunix-demo under the OBJECT CONFIGURATION FILE(S) section. Next, create your host object definition file. Next, define you hosts details such as hostname, IP address and the host template to use.

What is a Hosting group?

Host groups gather similar resources to the same group of hosts (for example, all hosts with big memory)- Use host groups to manage dedicated resources for a single organization or to share resources across organizations.

How do I find the host group in Linux?

To view all groups present on the system simply open the /etc/group file. Each line in this file represents information for one group. Another option is to use the getent command which displays entries from databases configured in /etc/nsswitch.

How do I add multiple Linux hosts to Nagios?

How to Add Linux Host to Nagios Monitoring Server

  1. Install NRPE Add-on and Nagios Plugins on remote Linux host:
  2. Add Nagios servers IP address, separated by a comma as mention below.
  3. Verify Nagios plugin:
  4. Command to start nrpe service on Linux host:
  5. Auto start nrpe service after reboot on Linux host:

How do I add a Linux server to Nagios monitoring?

Please use the below instructions to install Nagios Plugins and NRPE daemon on the Remote Linux Host.

  1. Step 1: Install Required Dependencies.
  2. Step 2: Create Nagios User.
  3. Step 3: Install the Nagios Plugins.
  4. Step 4: Extract Nagios Plugins.
  5. Step 5: Compile and Install Nagios Plugins.
  6. Step 6: Install Xinetd.

Is it right to say Nagios follows object oriented?

What is meant by saying Nagios is Object Oriented? Answer to this question is pretty direct I will answer this by saying: One of the features of Nagios is object configuration format in that you can create object definitions that inherit properties from other object definitions and hence the name.

What is the default host group in Nagios 3 on Ubuntu?

The default Nagios 3 package on Ubuntu defines a services for SSH and it is attached to a host group, ssh-servers. Host groups, as the name suggests groups hosts and can be used to assign services.

Why are my servers being added to the host group?

Adding servers to the host group helps us to group the servers and monitor with ease. At Bobcares, we often receive requests regarding Nagios as a part of our Server Management Services. Today, let’s explore more on this error and see how our Support Engineers fix it.

What is a host group in AWS?

Host groups, as the name suggests groups hosts and can be used to assign services. User can become a member of the groups through the group definition itself and the members attribute as we can see from the definition below that just has the localhost as a member. Multiple host names should be separated by commas.