I am testing our migration to HPC 2012 on Azure. Part of this involves moving from v1.6 to v1.8 of the Windows Azure HPC Scheduler SDK.
When using v1.6 I was able to configure two head node instances on Azure, which I believe creates an Active/Passive setup for the scheduler. With v1.8 using the same configuration gives the following error:
VERBOSE: Executing GenConfig library
WARNING: An exception was caught in Microsoft.Hpc.Azure.ClusterConfig.ClusterConfig
Exception calling "Generate" with "2" argument(s): "The instance number of HeadNode/WebFrontEndHeadNode role cannot be
greater than one."
At [snip]\WindowsAzureSchedulerModules\WindowsAzureScheduler\WindowsAzureScheduler.psm1:1252 char:9
+ $clusterConfig.Generate($InputCSCfg, $OutConfigFile)
This is an exception from the Microsoft.Hpc.Azure.ClusterConfig.dll assembly. It looks like a new check was added to the v1.8 library.
So my question is this: Is this new check correct? Can I only have one head node instance on Azure?
Would that not mean my head node will go down for windows updates, or if there is a hardware fault.
