Sometimes we, as a normal user or a system admin, need to know how well our system is running. Many questions related to system status can be answered by checking log files generated by active services. However, inspecting every bit of log files is not easy even for seasoned system admins. That is why they rely on monitoring software which is capable of gathering information from different sources, and reporting analysis result in easy to understand formats, such as graphs, visualization, statistics, etc.
There are many sophisticated monitoring system software such as Cacti, Nagios, Zabbix, Munin, etc. In this article, we pick a lightweight monitoring tool called Monitorix, which is designed to monitor system resources and many well-known third-party applications on Linux/BSD servers. Optimized to run on resource-limited embedded systems, Monitorix boasts of simplicity and small memory footprint. It comes with a built-in HTTP server for web-based interface, and stores time series statistics with RRDtool which is easy to combine with any scripting language such as Perl, Python, shell script, Ruby, etc.
Here is a list of Monitorix's main features. For a complete list, refer to the official site.
- System load and system service demand
- CPU/GPU temperature sensors
- Disk temperature and health
- Network/port traffic and netstat statistics
- Mail statistics
- Web server statistics (Apache, Nginx, Lighttpd)
- MySQL load and statistics
- Squid proxy statistics
- NFS server/client statistics
- Raspberry Pi sensor statistics
- Memcached statistics
Install and Configure Monitorix on Fedora, CentOS or RHEL
After this, Monitorix can be installed with this command:
To configure Monitorix, open the configuration file in /etc/monitorix/monitorix.conf, and change the options. The details on Monitorix configuration file can be found at http://www.monitorix.org/documentation.html
By default, the built-in HTTP server listens on port 8080. Thus, make sure that your firewall does not block TCP port 8080.
To start Monitorix, simply type the following.
Start your favorite web browser, and then go to http://<host-ip-address>:8080/monitorix to access Monitorix's web interface.
Install and Configure Monitorix on Arch Linux
On Arch Linux, the Monitorix package can be downloaded from AUR.
By default, the built-in HTTP server is disabled on Arch Linux. To enable built-in HTTP server, edit <httpd_builtin> section in /etc/monitorix.conf as follows.
<httpd_builtin> enabled = y host = port = 8080 user = nobody group = nobody log_file = /var/log/monitorix-httpd hosts_deny = hosts_allow = <auth> enabled = n msg = Monitorix: Restricted access htpasswd = /var/lib/monitorix/htpasswd </auth> </httpd_builtin>
Finally, start Monitorix service.
Open your favorite web browser, and go to http://<host-ip-address>:8080/monitorix to access Monitorix.
Install and Configure Monitorix on Debian and Ubuntu
For Debian family, Monitorix can be installed in two ways: manually or through a third party repository.
Manual installation (for Debian)
Install all dependent packages first.
Download Monitorix package from http://www.monitorix.org/downloads.html, and install it.
During installation, you might be asked to configure a backend web server. If you using Apache, make sure to reload Apache configuration by restarting Apache service.
Installation through repositories (for Ubuntu)
Enable Izzysoft repository by appending the following line in /etc/apt/source.list.
deb http://apt.izzysoft.de/ubuntu generic universe
Download and add a GPG key for the repository.
$ sudo apt-key add izzysoft.asc
Install Monitorix with apt-get. All its dependent packages will automatically be installed as well.
$ sudo apt-get install monitorix
Finally, start Monitorix service.
To configure Monitorix, edit /etc/monitorix/monitorix.conf with a text editor, and restart Monitorix service.
The built-in web server of Monitorix for Ubuntu is enabled by default. To access web-based monitoring result, go to http://<host-ip-address>8080/monitorix on your favorite web browser.
Install and Configure Monitorix on Raspberry Pi
If you want to install Monitorix on Raspberry Pi (which is Debian-based), you cannot use the Izzysoft repository mentioned above because it does not provide an ARM port of Monitorix. Instead, follow Debian-based manual installation as follows.
First, install required packages.
If some of the required packages are not be installed, we need to force install with this command.
Download Monitorix package (monitorix_x.x.x-izzy1_all.deb) from http://www.monitorix.org/downloads.html.
Install Monitorix package with the command below.
After installation is finished, we need to change a small thing in Monitorix configuration as follows.
Open /etc/monitorix/monitorix.conf with your favorite text editor. Scroll down until you find <graphs enable>. Search for "raspberrypi = n", and replace 'n' with 'y'. This will enable monitoring of Raspberry Pi clock frequency, temperatures and voltages.
After editing is done, restart Monitorix service.
By default, Monitorix's built-in HTTP web server is enabled. To access Monitorix's web interface, go to http://<raspberrypi-ip-address>:8080/monitorix
Monitorix Screenshots (on Raspberry Pi)
Monitorix home screen:
System load average and usage in graph option:
Active process graph option:
Choose "Clock Frequency" under "Raspberry Pi" section in the home screen, and you will see clock frequency, temperature, and voltage graphs for Raspberry Pi.
All monitoring graphs:
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