Nagios 8hours

Nagios has been a stalwart of the open source, and monitoring industry for almost 20 years. It is designed to notify the system administrator about any network problem that arises, and can be configured to e-mail or page an administrator at any time of day.

Basics of Nagios

Installing Nagios

Installing Nagios from source code

Running Nagios using virtualization

45min.

Nagios provides a web-based UI with detailed graphs and statistics to show if a system or service is in a healthy or unhealthy state. It is a very useful tool that can help you keep your system in good health and prevent outages.

Configuring Nagios

Using inheritance and templates

45min.

The interface offers different ways to see things such as graphs, list of hosts, list of services, list of notifications and event logs.

Setting up and using the web interface

Managing hosts and services

Managing downtimes and adding comments

Viewing Nagios information and generating reports

Changing the look of the Nagios web interface

45min.

Nagios offers an additional interface that can be used to monitor the status of different processes or applications.

Using third-party web interfaces

Learning command line interfaces

Using mobile applications to see the Nagios status

45min.

The Nagios Plugins are open-source plugins that can monitor services and servers for availability.

Understanding how checks work

Monitoring using the standard network plugins

Monitoring the e-mail servers

Monitoring network services

Monitoring the database systems

Monitoring the storage space

Monitoring the resources

Monitoring other operations

Additional and third-party plugins

45min.

Nagios has a lot of features that make it easy to use and configure. Advanced configuration options are available for experienced system administrators who can configure Nagios in ways that are not available with the standard installation.

Creating maintainable configurations

Configuring the file structure

Defining the dependencies

Using the templates

Using the custom variables

Understanding flapping

45min.

Nagios notifications are typically the first type of notification that users see when they log into their Nagios server. If a user has notifications turned off, these notifications will not appear on the console.

Creating effective notifications

Understanding escalations

Sending commands to Nagios

Creating event handlers

Using adaptive monitoring

45min.

The NRDP is a monitoring tool that uses passive checks to monitor the health of your infrastructure. It works by continuously checking the status of your servers and other devices through passive checks.

Understanding passive checks

Using NRDP

45min.

Nagios checks if the remote host is up and running, if it goes down, Nagios takes appropriate actions. With Nagios Monitoring Remote Hosts, you can monitor all kinds of services remotely without needing to install extra software on your remote network.

Monitoring over SSH

Monitoring using NRPE

Comparing NRPE and SSH

Alternatives to SSH and NRPE

45min.

Nagios monitoring using SNMP allows for users to receive alerts when something goes wrong with their servers in real-time. It can also be done by other means such as BGP or ARP.

Introducing SNMP

Working with SNMP and MIB

Setting up an SNMP agent

Using SNMP from Nagios

45min.

Nagios Advanced Monitoring (NAM) is a new feature that was recently introduced by Nagios Enterprises. NAM provides enterprise-level monitoring features without sacrificing common features like Nagios Core and Nagios XI.

Monitoring Windows machines

Understanding distributed monitoring

Using templates for distributed monitoring

45min.

Nagios is a command-line program that operates on UNIX and Linux operating systems. It receives instructions from monitoring plugins, which monitor the availability and performance of computer systems by sending notifications to Nagios when changes occur.

Introducing Nagios customizations

Creating custom active checks

Checking websites

Writing commands to send notifications

Managing Nagios

Using passive checks

Introducing the query handler

45min.