Recently while I was scouring through a spreadsheet of "unallocated" IP addresses, I thought to myself. There has to be a better way to manage an inventory of IP addresses, and while I'm at it maybe even provide a list of provisioned servers.
After some googling I found myself on RackTables.org the home of an open source project that aims to provide just what I was looking for. An Inventory system that tracks and manages Servers, Racks, IP Addresses and just about everything else in a data center.
For today's article I will cover the steps necessary to get RackTables up and running and ready for you to start tracking your data center inventory.
Taking care of the prerequisites
In order to run RackTables we will need to setup a basic webserver with PHP and a MySQL database. Since RackTables is written in PHP in theory it can be run on any webserver that runs PHP. To keep things simple for this article however, I am going to walk through setting up a very basic LAMP stack using Ubuntu Server 12.04.
Installing Apache with PHP Support
To install Apache and PHP we will be using the
apt package manager. If you are installing this on Red Hat or CentOS systems than the packages will be similar however you may need to modify the naming convention to match the packages within
# apt-get install apache2 apache2.2-common libapache2-mod-php5 \ php5-snmp php5-ldap php5 php5-common php5-gd curl php5-mysql \ mysql-client mysql-common
Apt may suggest additional packages to install, I suggest installing them as they may come in handy at a later time.
Installing MySQL Server
You may have noticed that I only installed the php5-mysql and mysql-client packages on the system. I am splitting the MySQL server package install as a second step as you may want to install the mysql-server package on a different server. Allowing you to separating the database and the RackTables application.
#apt-get install mysql-client mysql-common mysql-server
During the mysql-server installation you will be prompted to enter a MySQL root user password. This password does not need to be the same as the systems root users password. Make sure you remember this password as you will need it in upcoming steps.
Now that we have a basic LAMP setup we can get started with installing the RackTables.
Creating a System User for RackTables
To make things a bit more secure we are going to have all of the RackTables php files owned as a unprivileged user. This is a more secure than having the php files owned as root or the apache/nobody user.
# useradd -u 4000 -g users -s /sbin/nologin -c "RackTables User" -md /home/racktables racktables
Feel free to put the racktables user into a different users group or change the UID. If you aren't sure exactly what these do than I would suggest checking out my article on adding users in Linux.
Creating the RackTables Database
Before deploying the php files we will want to create a database on the MySQL server. To create the database we will need to login to the MySQL server via the MySQL Client package we installed. Hopefully you remember the MySQL root users password, as we will need it during this step.
# mysql -u root -p Enter password:
Now that we are logged into the MySQL server we can create the database
mysql> create database racktables; Query OK, 1 row affected (0.01 sec)
Creating the RackTables Database User
In theory we could let the racktables application login to MySQL via the root MySQL user, but that wouldn't be very secure. The below commands will create a database user named rackuser that only has access to the racktables database.
mysql> grant all privileges on racktables.* TO -> 'rackuser'@'localhost' identified by 'SecretPass';
MySQL keeps a cache of user privileges, whenever you make a change it is advisable to flush the cache to avoid confusion.
mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
At this point we are done with the MySQL CLI and we can logout with the exit command.
mysql> exit Bye
It is a good idea to test that the user/password worked before continuing. We will do this by logging into the MySQL Server via the CLI the same way we did when we created the database.
# mysql -u rackuser -pSecretPass Welcome to the MySQL monitor. Commands end with ; or \g.
Download and Deploy the Application
RackTables is an open source project and is downloadable from SourceForge. Below we will download and deploy the application files.
As the root user:
# cd /var/tmp # su -s /bin/bash racktables
As the racktables user:
$ wget http://sourceforge.net/projects/racktables/files/RackTables-0.20.5.tar.gz $ tar -xvzf RackTables-0.20.5.tar.gz
As the root user:
# mv RackTables-0.20.5/wwwroot /var/www/racktables
Go to the installation page
Apache has a default html documents directory of
/var/www by putting the RackTables files into
/var/www/racktables this will allow us to go to the application by typing http://server_ip/racktables.
The initial page should provide you with a link to continue the 6 steps of installation.
Follow the 6 Installation Steps
Step 1: Click proceed to start the installation process
The first step is self explanatory, simply click proceed.
Step 2: Check for missing packages
The second step will display if any of the php modules are missing. If any are missing you can install them using
apt-get, for example when I was writing this article I missed the GD module.
# apt-get install php5-gd
Step 3: Create the secret file
RackTables stores the database information in the secret file. We will set the permissions to 666 allowing Apache to write the information into this file during install. It is important to remember to reset the permissions to 644 at the end of the installation.
# touch /var/www/racktables/inc/secret.php # chmod 666 /var/www/racktables/inc/secret.php
Step 4: Insert the Database Information
Step 4 will import the database tables and structure as well as place the database information into the secret file. On this step simply input the database information into the form and click proceed.
Server: localhost Port: 3306 Database Name: racktables Username: rackuser Password: Your Password
If you have been following this article to the letter the information above should work, if not you will need to put in the correct information.
Step 5: Set the Administrator Password
After the database is imported you will be prompted for an administrator password. Simply set this and proceed.
Step 6: Accept the Installation and Proceed
The last step should be a success message stating that RackTables has been installed properly. At this point we will need to reset the secret file's permissions.
# chmod 644 /var/www/racktables/inc/secret.php
Now that the installation is finished you can start creating objects (servers, network devices, what not), adding your IP subnets and stop wondering when the last time this old spreadsheet has been updated.
Recently Benjamin published his first book; Red Hat Enterprise Linux Troubleshooting Guide. In addition to writing, he has several Open Source projects focused on making Ops easier. These projects include Automatron, a project enabling auto-healing infrastructure for the masses.
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