How do I monitor memory in Nagios?
A Nagios plugin is available to monitor memory uses on Linux system. You can download the check_mem.pl and configure with NRPE daemon. Download check_mem.pl using the following command and copy it to Nagios plugins directory. On CentOS/RHEL 64-bit systems this local will be /usr/lib64/nagios/plugins.
What is Nrpe check?
Advertisements. The Nagios daemon which run checks on remote machines in NRPE (Nagios Remote Plugin Executor). It allows you to run Nagios plugins on other machines remotely. You can monitor remote machine metrics such as disk usage, CPU load etc.
What is Nrpe in Linux?
The NRPE addon is designed to allow you to execute Nagios plugins on remote Linux/Unix machines. The main reason for doing this is to allow Nagios to monitor “local” resources (like CPU load, memory usage, etc.) on remote machines.
How do I check my server memory?
To check the amount of RAM (physical memory) installed in a system running Windows Server, simply navigate to Start > Control Panel > System. On this pane, you can see an overview of the system’s hardware, including total installed RAM.
How do I download Nagios plugins?
The Nagios::Plugin module is available from CPAN: http://search.cpan.org/dist/Nagios-Monitoring-Plugin/
How does Nrpe work?
NRPE is a monitoring agent and protocol that is often used to monitor remote hosts with Nagios. NRPE works with: a client (check_nrpe plugin) that runs on the Nagios server. a daemon that runs on the remote server, processes requests from the client, and returns status information.
How do I check memory on Linux?
- Open the command line.
- Type the following command: grep MemTotal /proc/meminfo.
- You should see something similar to the following as output: MemTotal: 4194304 kB.
- This is your total available memory.
What is Nagios monitoring tool in Linux?
Nagios is an open source monitoring system for computer systems. It was designed to run on the Linux operating system and can monitor devices running Linux, Windows and Unix operating systems (OSes). Nagios software runs periodic checks on critical parameters of application, network and server resources.
What is active check in Nagios?
Active checks are initiated by the check logic in the Nagios daemon. When Nagios needs to check the status of a host or service it will execute a plugin and pass it information about what needs to be checked.
Where is Nrpe CFG?
The main configuration file will be /etc/nagios/nrpe. cfg , and the default included directory is /etc/nrpe.
What is the command to check memory?
Its just like what happens on your desktop PC.
- free command. The free command is the most simple and easy to use command to check memory usage on linux.
- 2. /proc/meminfo. The next way to check memory usage is to read the /proc/meminfo file.
- top command.
What is active check and passive check in Nagios?
The major difference between active and passive checks is that active checks are initiated and performed by Nagios, while passive checks are performed by external applications.
How to check free memory on localhost using NRPE?
You can check whether the script generates output properly by manually running the following command on localhost. When used with NRPE, this command is supposed to check free memory, warn when free memory is less than 20%, and generate critical alarm when free memory is less than 10%. #./check_mem -f -w 20 -c 10
How to check if the NRPE script is working properly?
You can check whether the script generates output properly by manually running the following command on localhost. When used with NRPE, this command is supposed to check free memory, warn when free memory is less than 20%, and generate critical alarm when free memory is less than 10%. # ./check_mem -f -w 20 -c 10
How do I check disk space in NEMS Linux?
Edit / Disk Space and /var Disk Space in Advanced Services , changing the ARGS to: check_disk -a ‘-w 80 -c 90 -p / -u GB’ and check_disk -a ‘-w 80 -c 90 -p /var -u GB’ respectively. In order to use these commands, NRPE must be installed on the client system using the NEMS Linux installation procedure found here: NRPE For Linux
How do I upgrade NRPE in NEMS Linux?
The NRPE service must be installed before check_nrpe can be used to monitor the host. In NEMS Linux 1.5 and lower, an older version of NRPE was used. This can be upgraded by running sudo nems-upgrade however you must also make a few minor changes in NEMS NConf as follows: