To Install Nagios Core by Docker on Ubuntu 21.04

Introduction:

*Nagios Core is the monitoring and alerting engine that serves as the basis for hundreds of Nagios products. It is implemented as a daemon and runs natively on Linux/nix systems, featuring several APIs that can be used to perform additional tasks.

Installation Procedure:

Step 1: Check the OS version by using the below command

root@linuxhelp:~# lsb_release -a 
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 21.04
Release:	21.04
Codename:	hirsute

Step 2: Pull the Nagios Core image from the Docker Hub by using the below command

root@linuxhelp:~# docker pull jasonrivers/nagios 
Using default tag: latest
latest: Pulling from jasonrivers/nagios
08c01a0ec47e: Pull complete 
a8f2c86f74de: Pull complete 
cb72f88dd616: Pull complete 
b4d858437011: Pull complete 
fcd1fa5ad641: Pull complete 

Step 3: List the created Docker image by using the below command

root@linuxhelp:~# docker images 
REPOSITORY           TAG       IMAGE ID       CREATED        SIZE
jasonrivers/nagios   latest    5dab8a06fbb6   12 hours ago   769MB

Step 4: Run the Docker Container from the image with Name ‘nagios’ with mapping to the 8080 port number of the host system in a depreciated mode by using the below command

root@linuxhelp:~# docker run --name nagios -dp 8080:80 jasonrivers/nagios 
d7c5c4797de6e40e0fc22251d088ce6121e91356d3420c565bb9419bccc12609

Step 5: Ping http://localhost:8080 on Browser and login with Username as ‘nagiosadmin’ and Password as ‘nagios’ as shown in the below image

Step 6: This is the Dashboard of the Nagios Core

Step 7: This is image showing the Services Running on the Container.

With this the process of Installing Nagios Core by Docker on Ubuntu 21.04 has come to an end.