Category: Nagios

Monitoring Artifactory Service with Nagios

October 15, 2020 / ron / 0 Comments

Requirement

check_jmx plugin

Enable JMX on Artifactory

Update the /var/opt/jfrog/artifactory/etc/default file to add the following:

export JAVA_OPTIONS="$JAVA_OPTIONS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=5000 -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

If you wanted to connect remotely (e.g. jconsole) add the following argument:
-Djava.rmi.server.hostname=<IP_ADDRESS>

Restart the artifactory service:

sudo systemctl restart artifactory.service

Testing with check_jmx plugin

/usr/local/nagios/libexec/check_jmx/nagios/plugin/check_jmx -U service:jmx:rmi:///jndi/rmi://localhost:5000/jmxrmi -O "org.jfrog.artifactory:instance=Artifactory, type=Storage,prop=Binary Storage" -A Size

Expect to see something similar to the following output:

JMX OK Size=377653571

Downloading the Nagios check_url.pl Plugin in Ubuntu

October 15, 2020 / ron / 0 Comments

Downloading the check_url.pl plugin

Change to the nagios plugin directory:
```
cd /usr/local/nagios/libexec/
```

Download the check_url.pl plugin:

sudo wget -O check_url.pl "https://exchange.nagios.org/components/com_mtree/attachment.php?link_id=1395&cf_id=24"

Make the plugin executable:
```
sudo chmod 755 check_url.pl
```
Update the file check_url.pl to replace all tmp_ with /tmp/tmp_ text (i.e. if you are using vi for editing using the following:)
```
%s#tmp_#/tmp/tmp_#g
```

Testing The Plugin

/usr/local/nagios/libexec/check_url.pl https://www.google.com

Expect to see the following output:

OK: 200  OK

Displaying the Help

/usr/local/nagios/libexec/check_url.pl -h

Downloading the Nagios check_jmx Plugin in Ubuntu

October 15, 2020 / ron / 0 Comments

Downloading the check_jmx plugin

Change the directory to your home directory:
```
cd ~
```

Download the check_jmx plugin:

wget -O check_jmx.tgz "https://exchange.nagios.org/components/com_mtree/attachment.php?link_id=1274&cf_id=24"

Extract the downloaded plugin:
```
tar xvf check_jmx.tgz
```
Move the plugin to /usr/local/nagios/libexec/ directory:
```
sudo mv check_jmx /usr/local/nagios/libexec/
```
Update the file /usr/local/nagios/libexec/check_jmx/nagios/plugin/check_jmx to enclose the $@ with double quotation marks:
```
"$@"
```
Thus the whole java line will become:
```
java -cp $RDIR/jmxquery.jar org.nagios.JMXQuery "$@"
```
The use of the double quote is to handle space character properly

Displaying the Help

/usr/local/nagios/libexec/check_jmx/nagios/plugin/check_jmx -help

Compiling Nagios Plugin 2.3.3 to Ubuntu 20.04

October 13, 2020 / ron / 0 Comments

Installing the Nagios Plugins

Refresh the repository:
```
sudo apt-get update
```

Install the dependencies:

sudo apt-get install -y autoconf gcc libc6 libmcrypt-dev make libssl-dev wget bc gawk dc build-essential snmp libnet-snmp-perl gettext

Change the directory to your home directory:
```
cd ~
```

Download the nagios plugins source codes:

wget --no-check-certificate -O nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.3.3.tar.gz

Extract the downloaded source codes:
```
tar zxf nagios-plugins.tar.gz
```
Change to the directory of the newly extracted source codes:
```
cd nagios-plugins-release-2.3.3
```
Setup and configure:
```
sudo ./tools/setup
sudo ./configure
```
Compile the source codes:
```
sudo make
```
Install the plugins to /usr/local/nagios/libexec directory:
```
sudo make install
```

Configuring NRPE 4 Daemon and Plugin to Ubuntu 20.04

October 12, 2020 / ron / 0 Comments

Installing NRPE

1. Refresh the repository:
```
sudo apt-get update
```
2. Install the dependencies:
```
sudo apt-get install autoconf automake gcc libc6 libmcrypt-dev make libssl-dev wget openssl -y
```
3. Change the directory to your home directory:
```
cd ~
```
4. Download the nrpe 4 source codes:
```
wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz
```
5. Extract the downloaded source codes:
```
tar xvf nrpe-4.0.3.tar.gz
```
6. Change to the directory of the newly extracted source codes:
```
cd nrpe-4.0.3
```
7. Run the configure script that enables the command arguments for clients and uses ssl library:
```
sudo ./configure --enable-command-args --with-ssl-lib=/usr/lib/x86_64-linux-gnu/
```
8. Compile the source codes:
```
sudo make all
```
9. Install the nagios user and group:
```
sudo make install-groups-users
```
10. Install both NRPE daemon and check_nrpe plugin:
```
sudo make install
```
11. Install the nrpe config file (i.e. /usr/local/nagios/etc/nrpe.cfg):
```
sudo make install-config
```
12. Install the init script:
```
sudo make install-init
```
13. Enable the nrpe daemon:
```
sudo systemctl enable nrpe.service
```
14. Update allowed_hosts field in the /usr/local/nagios/etc/nrpe.cfg file: to include your nagios server address (e.g. your nagios server address is 10.0.0.174 the allowed hosts is as follows):
```
allowed_hosts=127.0.0.1,::1,10.0.0.174
```
15. Update the dont_blame_nrpe field: to 1 on the same configuration file to allow your clients to specify arguments:
```
dont_blame_nrpe=1
```
16. Start the nrpe daemon:
```
sudo systemctl start nrpe.service
```
  The NRPE service is listening with the port 5666 by default.

Testing The NRPE Plugin

/usr/local/nagios/libexec/check_nrpe -H localhost

Expect to see the version of NRPE daemon

Compiling NRPE 4 Plugin to Tinkerboard

October 12, 2020 / ron / 0 Comments

Installing NRPE

Refresh the repository:
```
sudo apt-get update
```
Install the dependencies:
```
sudo apt-get install libssl-dev -y
```
Change the directory to your home directory:
```
cd ~
```

Download the nrpe 4 source codes:

wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz

Extract the downloaded source codes:
```
tar xvf nrpe-4.0.3.tar.gz
```
Change to the directory of the newly extracted source codes:
```
cd nrpe-4.0.3
```
Run the configure script:
```
./configure
```
Compile the check_nrpe plugin only:
```
sudo make check_nrpe
```
Install the newly compiled plugin:
```
sudo make install-plugin
```

Update the file /usr/local/nagios/etc/objects/commands.cfg to add the following entry:

define command {
	command_name    check_nrpe
	command_line    /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ $ARG2$
}

Testing The Plugin

Using the command check_nrpe we can check the load on the host 10.0.0.202 (i.e. NRPE daemon must be configured and listening on port 5666) using the following command:

/usr/local/nagios/libexec/check_nrpe -H 10.0.0.202 -c check_load

Expect to see the output of the check_load plugin executed on the host 10.0.0.202

Configuring Nagios 4 to Tinkerboard

October 12, 2020 / ron / 0 Comments

Installing Nagios

Update the system:

sudo apt-get update && sudo apt-get upgrade

Install the dependencies:

sudo apt-get install autoconf gcc libc6 make wget unzip apache2 php libapache2-mod-php libgd-dev libsasl2-modules mailutils -y

Change the directory to your home directory:
```
cd ~
```

Download the nagios 4 source codes:

wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.6.tar.gz

Extract the downloaded source codes:
```
tar xzf nagios-4.4.6.tar.gz
```
Change to the directory of the newly extracted source codes:
```
cd nagios-4.4.6
```

Run the configure script with integration to apache2:

./configure --with-httpd-conf=/etc/apache2/sites-enabled

Compile the source:
```
sudo make all
```
Install the nagios user and group:
```
sudo make install-groups-users
```
Make nagios user a member of the www-data group:
```
sudo usermod -aG nagios www-data
```
Install nagios.
```
sudo make install
```
Install the init script:
```
sudo make install-init
```
Initialize the init script:
```
sudo make install-daemoninit
```
Install and configures permissions on the directory for holding the external command:
```
sudo make install-commandmode
```
Install the sample config files on the /usr/local/nagios/etc directory:
```
sudo make install-config
```
Install the nagios config file to apache2:
```
sudo make install-webconf
```
Update the SUID of the ping command:
```
sudo chmod 4755 /bin/ping
```

Installing the Nagios Plugins

Run the following command:
```
sudo apt install nagios-plugins
```
Update the $USER1$ property in the /usr/local/nagios/etc/resource.cfg file to have /usr/lib/nagios/plugins like as follows:
```
$USER1$=/usr/lib/nagios/plugins
```

Configuring Apache2 Web Server

Enable the rewrite module:
```
sudo a2enmod rewrite
```
Enable the CGI module:
```
sudo a2enmod cgi
```

Create nagiosadmin as a nagios web user:

sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

Assign a strong password

Restart the apache2 service:
```
sudo systemctl restart apache2
```

Category: Nagios

Monitoring Artifactory Service with Nagios

Requirement

Enable JMX on Artifactory

Testing with check_jmx plugin

Downloading the Nagios check_url.pl Plugin in Ubuntu

Downloading the check_url.pl plugin

Testing The Plugin

Displaying the Help

Downloading the Nagios check_jmx Plugin in Ubuntu

Downloading the check_jmx plugin

Displaying the Help

Compiling Nagios Plugin 2.3.3 to Ubuntu 20.04

Installing the Nagios Plugins

Configuring NRPE 4 Daemon and Plugin to Ubuntu 20.04

Installing NRPE

Testing The NRPE Plugin

Compiling NRPE 4 Plugin to Tinkerboard

Installing NRPE

Testing The Plugin

Configuring Nagios 4 to Tinkerboard

Installing Nagios

Installing the Nagios Plugins

Configuring Apache2 Web Server

Recent Posts

Recent Comments

Archives

Categories

Meta