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This chapter talks in detail about Nagios architectures.

Nagios Architecture

The following points are worth notable about Nagios architecture −

• Nagios has server-agent architecture.
• Nagios server is installed on the host and plugins are installed on the remote hosts/servers which are to be monitored.
• A Nagios sends a signal through a process scheduler to run the plugins on the local/remote hosts/servers.
• Plugins collect the data (CPU usage, memory usage etc.) and sends it back to the scheduler.
• Then the process schedules send the notifications to the admin/s and updates Nagios GUI.

The following figure shows Nagios Server Agent Architecture in detail −

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