So, you boot up your shiny new AWS CentOS 6 server, and run the cPanel installation script. Next you reboot the server… ever… and it never comes back online? My question to you: is your IP also licenced for CloudLinux?
When you install cPanel on any server, if your server’s primary IP address also has a current CloudLinux license, the cPanel installation will also install CloudLinux. Then, when you reboot, you’ll see a beautiful little kernel panic, like this:
[ 43.125106] dracut Warning: No root device "block:/dev/xvde" found
[ 43.128780] dracut Warning: Boot has failed. To debug this issue add "rdshell" to the kernel command line.
[ 43.128957] dracut Warning: Signal caught!
[ 43.131931] dracut Warning: Boot has failed. To debug this issue add "rdshell" to the kernel command line.
[ 43.132214] Kernel panic - not syncing: Attempted to kill init!
[ 43.132228] Pid: 1, comm: init veid: 0 Not tainted 2.6.32-458.18.1.lve1.2.39.el6.x86_64 #1
This is caused by a differentiation in drive detection in naming, described in detail here.