I recently decided to build a demo system for VS2010 Lab Manager. This was for a number of reasons, not least I just wanted to have a proper play with it, but also that I was hoping to do a session on Microsoft Test and Lab Manager at DDD8 (as it turns out my session did not get voted for, maybe better luck for DDS, you can still vote for that conference’s sessions).
Anyway if any of you have looked at the Lab Manager side of MTLM you will know that getting it going is no quick task. Firstly I cannot recommend highly enough the Lab Management Teams’ blog posts ‘Getting started with Lab Management’ Parts 1, 2 ,3 and 4. This type of walkthrough post is a great way to move into a new complex product such as this. It provides the framework to get you going, it doesn’t fix all your problems but gives you a map to follow into the main documentation or other blog posts.
The architecture I was trying to build was as below. My hardware was a Shuttle PC as this was all I could find in the office that could take 8Gb of memory, the bare minimum for this setup. Not as convenient as a laptop for demos, but I was not going to bankrupt myself getting an 8Gb laptop!
As I wanted my system to be mobile, it needed to be it’s own domain (demo.com). This was my main problem during the install. MTLM assumes the host server and all the VMs are in the same domain, but that the domain controller (DC) is on some other device on the domain. I installed the DC on the host server; this meant I had to do the following to get it all to work (I should say I did all of these to get my system running, but they may not all be essential, but they are all sensible practice so probably worth doing)
- Run the VMM Host as a user other than the default of Local System (this is an option set during the installation). The default Local System user has reduced rights on a domain controller, and so is not able to do all that it needs to. I create a new domain account (demo\VMMserver) and used this as the service account for the VMM.
- The ‘Getting Started’ blog posts suggest a basic install of TFS, this just installs source control, work item tracking and build services using a SQL Express instance. This is fine, but this mode defaults to using the Network Service account to run the TFS web services. This has the same potential issues as the Local System account on the DC, so I swapped this to use a domain account (demo\TFSservice) using the TFS Administration console.
- AND THIS IS THE WIERD ONE AND I SUSPECT THE MOST IMPORTANT. As I was using the host system as a DNS and DHCP the VMs needed to be connected to the physical LAN of the host machine to make use of these services. However as I did not want them to pickup my office’s DHCP service I left the physical server’s Ethernet port unplugged. This meant that when I tried to create a new lab environment I got a TF259115 error. Plugging in a standalone Ethernet hub (connected to nothing else) fixed this problem. I am told this is because part of the LAN stack on the physical host is disabled due to the lack of a physical Ethernet link, even though the DNS and DHCP services were unaffected. The other option would have been to run the DNS, DHCP etc on Hyper-V VM(s).
- When configuring the virtual lab in TFS Administration console the ‘Network Location’ was blank. If you ignore this missing Network location or manually enter it you get a TF259210 error when you verify the settings in TFS Administration. This is a known problem in SCVMM and was fixed by overriding the discovered network and entering demo.com.
So I now had a working configuration, but when I try to import my prepared test VM into Lab Center, I got an “Import failed, the specified owner is not a valid Active Directory Domain Services account, Specify a valid Active Directory Domain Services account and try again” error. If I check the SCVMM jobs logs (in SCVMM Admin console) I saw this was an Error 813 in the ‘create hardware setup’ step. However, the account the job was running as was a domain user, as was the service account the host was running on (after I had made the changes detailed above) as I was confused.
This turns out to be a user too stupid error; I was logged in as the TFS servers local administrator (tfs2010\administrator) not the domain one (demo\administrator), or actually any domain account with VMM administrator rights. Once I logged in on the TFS server (where I was running MTLM) as a domain account all was OK. Actually I suspect moving to the VMMService and TFSService accounts was not vital, but did not harm.
I could now create my virtual test environment and actually start to create Team Builds that make use of my test lab environment. Also I think having worked though these problems I have a better understanding of how all the various parts underpinning MTLM hang together, a vital piece of knowledge if you intend to make real use of these tools.
Thanks to everyone he help me when I got stuck