I’ve been a fan of the Car Talk radio program since I was introduced to it in 1993. I hope the Tappet brothers don’t mind if I borrow the theme from one of their popular segments appropriately called Puzzler. It seemed fitting for this article which I’m going to call VMware Talk Puzzler. Not surprising, the goal of the Car Talk Puzzler is to listen to the problem (which is typically not simple), then provide the root cause. In this adaptation, I’ll present a real life vSphere problem. If you choose to take a stab, your job is three fold:
1) Identify the root cause of the problem.
2) Identify the solution.
3) Identify the unique tasks or chain of events which lead to the problem.
Here we go.
I was called in to help troubleshoot a problem. “Carl” had created a virtual machine in a VMware vSphere 4.1 Update 1 cluster. The problem Carl was experiencing was that the VM would not power on. Error messages in vCenter include but are not limited to:
“Failed to find a host for powering on the virtual machine.”
“The following faults explain why the registered host is not compatible.”
“The number of virtual CPUs may be limited by the guest OS selected for the virtual machine or by the licensing for the host.”
I asked if the ESXi cluster and vCenter were licensed. Carl confirmed by showing me that vCenter was licensed with Standard Edition and the hosts which wouldn’t power on the VM were still using 60 day Evaluation licensing as they were just recently built. I further verified the Evaluation licensing had not yet expired.
I asked Carl to show me details of the VM. He proceeded to show me the VM was created with the following shell specifications:
1) Identify the root cause of Carl’s vSphere problem.
2) Identify the solution for Carl.
3) Identify the tasks or chain of events which lead to Carl’s problem.
If you think you know the answer, write it on the top of a shrink wrapped pallet containing a Cisco UCS 5100 Series Blade Server Chassis, fully loaded with UCS B200 M2 Blade Servers each with 192GB RAM, UCS 6100 Series Fabric Interconnects, and a pair of Cisco Nexus 5548P next generation 10GbE switches and send to my mailing address.
Or… reply in the comments section below.
The first correct and complete answer (I hope there is just one) will receive internet recognition, real life respect, and if I can find one, a prize. No promises on that last one but I’ll see what I can do.