https://github.com/irezaul/nagios
https://github.com/irezaul/nagios
Last synced: 3 months ago
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- Host: GitHub
- URL: https://github.com/irezaul/nagios
- Owner: irezaul
- Created: 2021-07-14T13:48:03.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2021-08-23T17:43:06.000Z (almost 4 years ago)
- Last Synced: 2025-01-12T21:12:30.344Z (5 months ago)
- Size: 284 KB
- Stars: 0
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Nagios - `Monitoring Tool`
### CICD- Countinuous Integration & Continuous Deployment
`Countinuous Integration`
Countinuous Integration | BY
| :--- | ---:
Planning | Jira
Coding | git
Build | Maven
Testing | Selenium
`Continuous Deployment or Continuous Delivery`
Continuous Deployment | BY
| :--- | ---:
Deployment is 2 types | 1. Treditional deployment 2. Containerized deployment
Treditional| puppet or Ansible | ----
Containerized deployment | Docker/ Kubernetes
`Countinuous Monitoring`
Monitoring | BY
| :--- | ---:
Monitoring | Nagios |
#### 1. Update Apt
```bash
apt-get update
```
#### 2. Install Nagios & dependencies
```bash
apt-get update && apt-get install build-essential apache2 php openssl perl make php-gd libgd-dev libapache2-mod-php libperl-dev libssl-dev deamon wget apache2-utlis unzip
```
### On VM-Machine use this command
```bash
apt-get update && apt install -y autoconf bc gawk dc build-essential gcc libc6 make wget unzip apache2 php libapache2-mod-php libgd-dev libmcrcd ypt-dev make libssl-dev snmp libnet-snmp-perl gettext
```
### `also we can install one by one`
``` bash
apt-get install build-essential
apt-get install apache2
apt-get install php
apt-get install openssl
apt-get install perl
apt-get install make
apt-get install php-gd
apt-get install libgd-dev
apt-get install libapache2-mod-php
apt-get install libperl-dev
apt-get install libssl-dev
sudo apt install librecad
sudo apt-get install daemon
apt-get install wget
apt-get install apache2-utils
apt-get install unzip
```
#### 3. Check if Apache is installed in Nagios Server by pasting public IP or static IP into the web browser -
> Create nagios user and nagcmd group and add the nagios and apache user to the part of the nagcmd group.
```bash
useradd nagios
groupadd nagcmd
usermod -a -G nagcmd nagios
usermod -a -G nagcmd www-data
```
### 4. Nagios Installation (cont)
#### Install `Nagios Core`
```bash
cd /tmp
wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.6.tar.gz
tar -zxvf /tmp/nagios-4.4.6.tar.gz
cd /tmp/nagios-4.4.6/
```
#### 5. Perform the below steps to compile the Nagios from the source code
```bash
./configure --with-nagios-group=nagios --with-command-group=nagcmd --with-httpd_conf=/etc/apache2/sites-enabled/
make all
make install
make install-init
make install-config
make install-commandmode
```
#### 6. Execute the below command in the terminal to install Nagios web interface
```bash
make install-webconf
```
#### 7. Create Nagios Login and Password (use “nagios” as password)
```bash
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
```
#### 8. Run the following command:
```bash
a2enmod cgi
```
#### 9. Restart Apache Service to make the new settings take effect
```bash
systemctl restart apache2.service
```
### Nagios Installation (cont)
#### 10. In web `browser` type: like- `192.168.x.x/nagios` Click Hosts and you will see an error. This is because Nagios plugins has not been installed yet. Install Nagios plugins:
```bash
cd /tmp
wget https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz
tar -zxvf /tmp/nagios-plugins-2.3.3.tar.gz
cd /tmp/nagios-plugins-2.3.3/
```
#### 11. Compile and install the plugins
```bash
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
```
#### 12. Verify the sample Nagios configuration files. You should have “0” warnings and errors
```bash
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
```
#### 13. Enable Nagios to start automatically at system startup and start Nagios service
```bash
systemctl enable nagios
systemctl start nagios
```
> Your localhost on Nagios dashboard should be up and services should come up
### * Nagios `File System`
#### * Nagios File System (cont)
> Nagios is installed under directory `/usr/local/nagios/`
> Under this directory libexec contain all the plugins as binary files. By default there are total 50 plus plugins installed
> The etc directory is the main operational directory and contain nagios.cfg file and objects directory `/usr/local/nagios/etc/objects/`
> All the object resources in Nagios are defined inside the nagios.cfg file. This file determines what kind of resource/objects can be declared on the dashboard which can be external servers (linux/windows), log files, printers, routers, switches etc
##### Each element inside the Nagios dashboard is an object and stored inside the objects directory under the extension `“.cfg”`. These are the configuration files. All Nagios objects reside inside these cfg files
##### Go to directory: `cd /usr/local/nagios/etc/objects` and list all files
> Open the localhost.cfg and you will see the services
