Here are some pictures of my headless Xen server:
Doesn't it fit quite nicely where my blender used to be? Yes, it's in my kitchen... And yes, my kitchen has a network plug...
I tried to show a lot in one picture, so excuse the mess and let me explain a few things:
- This screenshot comes from my workstation where the XenCenter is installed (that's the graphical admin console for the Xen server)
- For those who've followed my previous post, I replaced Ubuntu 7.04 with CentOS 5.0 since Xen provided a template which made it a lot easier to configure correctly.
- On the bottom left, you can see the undocked, shrunk console of a Windows server.
- On the top left, you see me remoting to my CentOS server via VNC. Similarly, I could have MSTSC'ed in either Windows server, in addition to viewing them in Xen.
- In the top right, the XenCenter console, connected to and from which I control my "xenserver" shows the last 15 minutes' performance. During those 15 minutes, to make things a little interesting, one server was booted, part of the reason for the spike in memory + CPU usage, and another shut down a few minutes later, freeing up some memory.
This is what XenCenter typically looks like full screen. At that moment, only one of my virtual servers is running, showing its 1024x768 console.
On the left, you see a list of all the default templates. The SUSE Linux's name has "v10 SP1" cut off, for those interested). Note that the 2 Debians contain a full image of the virtual machines so they're ready to go, just right-click and select "New VM". All the others are bare templates and you'll need to provide the files to setup the OS, whether an iso's CD or DVD, or a network connection to either an http, ftp or rsync.
I would never have guessed I would be slowed down by having just one CD/DVD player on my server! That's the reason you see the FileZilla icon. Now that my workstation runs a local FTP server, I can set up new VMs much faster, even simultaneously, without getting up from my chair and having to change CDs. From virtualization to vegetation, Homer Simpson would be proud...