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PSD – probably I got the root cause of this

by on February 11, 2013

I got too many times the Purple Screen of Death on my VMWare cluster.

I suspected a few things that might cause this:

First – I’ve downloaded CDH VMDK, which is supposed to be for VMPlayer and not for ESX, but I thought – what the heck… it might work. I did not expect it to kill my servers. even if it should not work – it should not kill the servers as well.

Then I thought i have too many servers on a single node, and i lack some memory.
Adding memory did not help either.

Lastly I thought it the fault of a special version on ESXi dedicated for HP, which suppose to come with all drivers and SW related to HP (e.g. hpacucli).
I’ve re-installed with standard version of VMWare, and still got the PSD.

Also – I could not access the CDH VM – the console gave me strange error, and I could not shut the damn VM down.

The only solution was to create a new cluster with no HA capabilities, disconnect the host from the current cluster, reconnect it the this new cluster. Then kill the VM via command line (esxcli vm process kill -w number -t force).
then – and only then – did I manage to delete the VM from the disk, and to live happily ever after (till next issue comes along.)

When the host was within the HA cluster – every time I killed the VM via CLI, I could not count till ten and the purple screen came back.

Now I can continue with my original plans of HBase on VM.

My next issue came along quiet quickly:

I have a few old VMs which i want to keep.
They are quiet large ones – almost 1/2 TB each.
I have an IBM v7000 storage with plenty of room, so i created large disk and gave it to the host.
I’m working with iScsi as it seems easier for me than handling Fiber.
Anyways – first try and I think I’ve defined the iscsi correctly as i can see the storage.
However – when I try to “Add Storage” and create a VMFS datastore – i failed with timeout.
I hope that there is no limit for the size of the iscsi datastore… 

One thing for sure – I have a lot to learn about all the various configurations of VMWare.
Xen and KVM seem to be easier.

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