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From Nitin Mehta <>
Subject Re: storage issues
Date Fri, 08 Mar 2013 04:43:09 GMT

On 07/03/13 11:01 PM, "Valery Ciareszka" <> wrote:

>Hi all,
>I use CS 4.0.1 (1 management node, 1 KVM node, 2 storage nodes that act
>like single nfs server (HA) - have primary and secondary storage there,
>more NFS server for another secondary storage (having 2 SS in one zone)
>I've faced next issues:
>-KVM node tries to reboot when primary storage is offline. I had made wrap
>script on /sbin/reboot and found that reboot is called from
>reboot called at Thu Mar 7 11:08:19 EST 2013
>root 9943 0.0 0.0 108164 1528 ? S 11:08 0:00 /bin/bash
>/usr/lib64/cloud/common/scripts/vm/hypervisor/kvm/ -i
> -p /GIGO/cloud -m /mnt/50127bd7-d195-3f65-83ea-f131c2d5dc73 -c
>I tested how VM feels itself upon offlining primary storage - when primary
>storage returns back, everything is ok inside VM.
>So I have the question - why KVM node tries to reboot itself ?
>Several more questions about secondary storage.
>-If I have more than 1 secondary storage configured within one zone, how
>does cloudstack choose on which of them it will  store
>templates/iso/snapshots ?

It is chosen randomly for private templates (you can open an enhancement
to have a space based allocator). Public templates should be copied in all
sec. storage.
Multiple sec. storage is for more disk space and higher availability for
public templates.

>-I realized that contents of 2 sec storage are different. Imagine we have
>lost contents of  one of the secondary storage permamently. But we have 2
>important templates that were backuped. But they have 100gb+.Is there way
>to put them on new secondary storage without uploading 100GB through
>webmanagement  ?

If templates were public they will be available in the other sec. storage
as well. In case of private template you would need to again upload it.

>-Is there way to keep both secondary storages in sync  ?

As stated above only public templates should be copied in all sec.
In case you want this behaviour I suggest you opening an enhancement bug
at Jira.


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