This article covers a version of Ubuntu that is no longer supported. If you are currently operate a server running Ubuntu 12.04, we highly recommend upgrading or migrating to a supported version of Ubuntu:
Reason: Ubuntu 12.04 reached end of life (EOL) on April 28, 2017 and no longer receives security patches or updates. This guide is no longer maintained.
This guide might still be useful as a reference, but may not work on other Ubuntu releases. If available, we strongly recommend using a guide written for the version of Ubuntu you are using. You can use the search functionality at the top of the page to find a more recent version.
Zabbix is a networked server and software monitor. It can be used to keep track of multiple physical or virtual private server instances.
The client-server model that Zabbix employs allows the cloud server to collect rich sets of data that be used to graph historical trends. This can be very useful for monitoring the performance of the websites and applications hosted on your VPS.
For this guide, we will configure two machines. One will be configured as the server, and the other as a client. They both will run Ubuntu 12.04 LTS on 20GB Droplets.
We will begin by installing the Zabbix server on the VPS that we will use as the monitoring station.
Ubuntu has Zabbix in its repositories, but it is outdated. We will use a PPA with more up-to-date packages instead.
Edit apt source list to add the PPA:
sudo nano /etc/apt/sources.list
Add the following items at the end of the file:
# Zabbix Application PPA deb http://ppa.launchpad.net/tbfr/zabbix/ubuntu precise main deb-src http://ppa.launchpad.net/tbfr/zabbix/ubuntu precise main
Save and close the file.
Next, we need to add the PPA's key so that apt-get trusts the source:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C407E17D5F76A32B
We can now install Zabbix. It will pull in the necessary LAMP dependencies as well:
sudo apt-get update sudo apt-get install zabbix-server-mysql php5-mysql zabbix-frontend-php
During the installation, you will be asked to choose a password for the MySQL root account. Make a selection and confirm your choice.
Next, we will need to configure the packages we just installed.
First, we will edit the main Zabbix server configuration file. Open the file with root privileges:
sudo nano /etc/zabbix/zabbix_server.conf
Search for the following properties and set them accordingly. Some may already be set correctly, and some you may have to add. Choose a password as well:
DBName=zabbix DBUser=zabbix DBPassword=Your.Password.Here
Save and close the file.
Next, we will go into the package directory and unzip the SQL files that will define our database environment:
cd /usr/share/zabbix-server-mysql/ sudo gunzip *.gz
We will import the SQL files into our database. However, we first must create the database and do some initial configuration.
Log into MySQL as the root user using the password that you set up during installation:
mysql -u root -p
First, create a user for Zabbix that matches the information we entered in the "/etc/zabbix/zabbix_server.conf" file. Make sure to use the same information:
create user 'zabbix'@'localhost' identified by 'Your.Password.Here';
Next, we will create the Zabbix database:
create database zabbix;
Give control over the new database to the new user we created:
grant all privileges on zabbix.* to 'zabbix'@'localhost';
The following line will implement our new permissions:
We are now done with the initial MySQL configuration. Exit back to the shell:
Now that we have our database set up, we can import the files that Zabbix needs to function. Enter the password for the user "zabbix" that you configured when prompted:
mysql -u zabbix -p zabbix < schema.sql
Do the same with the images file:
mysql -u zabbix -p zabbix < images.sql
And finally, import the data file:
mysql -u zabbix -p zabbix < data.sql
We need to adjust some values for the php processing of our monitoring data. Open the php configuration file:
sudo nano /etc/php5/apache2/php.ini
Search for and adjust the following entries. If they do not exist, add them:
post_max_size = 16M max_execution_time = 300 max_input_time = 300 date.timezone = UTC
Save and close the file.
Next, we will copy the Zabbix-specific php file into the configuration directory:
sudo cp /usr/share/doc/zabbix-frontend-php/examples/zabbix.conf.php.example /etc/zabbix/zabbix.conf.php
Open the file:
sudo nano /etc/zabbix/zabbix.conf.php
Edit the following values. Use the same info as when you set up the database earlier:
$DB['DATABASE'] = 'zabbix'; $DB['USER'] = 'zabbix'; $DB['PASSWORD'] = 'Your.Password.Here'
Save and close the file.
There are a few more files that we need to configure.
First, we'll move the Zabbix apache file from the package directory:
sudo cp /usr/share/doc/zabbix-frontend-php/examples/apache.conf /etc/apache2/conf.d/zabbix.conf
Ensure that the "alias" mod is enabled within Apache:
sudo a2enmod alias
Restart Apache to use the copied configuration file:
sudo service apache2 restart
Edit the Zabbix init file to ensure that it performs the correct action:
sudo nano /etc/default/zabbix-server
Go to the bottom and adjust the "START" property to read "yes":
Save and close the file. We can now start Zabbix:
sudo service zabbix-server start
Next, we need to configure the agent software that reports to the Zabbix server. We will install the agent software on our server machine and an additional client machine.
Follow these steps on both machines. Adjust the commands to reflect the correct information.
First, install the agent software:
sudo apt-get update sudo apt-get install zabbix-agent
Next, we need to update the configuration files:
sudo nano /etc/zabbix/zabbix_agentd.conf
Edit the "Server" property to reflect the IP Address of the Zabbix server. For the agent configuration on the Zabbix server, you can use "127.0.0.1":
Adjust the "Hostname" property to reflect the hostname of the machine being monitored.
<p>Save and close the file.</p> <p>Restart the agent software:</p>
sudo service zabbix-agent restart
In your web browser, navigate to your Zabbix server's IP address followed by "/zabbix":
You will be presented with a login screen. The default credentials are as follows:
Username = admin Password = zabbix
When you have logged in, click on the "Configuration" button, and then "Hosts" in the top navigation bar.
Click on the name of the server (by default, this should be "Zabbix server"). This will open the host configuration page.
Adjust the Hostname to reflect the hostname of your Zabbix server (this should be the same hostname you entered in the agent configuration for the server machine).
At the bottom, change the "Status" property to "Monitored". Click save.
You will be dopped back to the Hosts configuration page. Re-click on the hostname again.
This time, click on the "Clone" button at the bottom of the page.
We will configure this to reflect the settings of the client machine. Change the hostname and the IP address to reflect the correct information from the client agent file.
In the "groups" section, select "Zabbix servers" and click the right arrow icon to remove that group. Select the "Linux servers" and click the left arrow icon to add that group setting.
Click "Save" at the bottom.
After a few minutes, you should be able to see both computers by going to "Monitoring" and then clicking on "Latest data".
There should be information for both the server and client machines populating.
If you click on the arrows next to an item, you can see the collected information.
If you click "Graph" you will see a graphical representation of the data points that have been collected:
As with all monitoring software, these graphs will become more interesting the longer the server runs.
There are many other options that you can utilize to keep an eye on your VPS. Explore the interface to get comfortable with the powerful monitoring tools.
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