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Re: [Xen-API] The vdi is not available

  • To: xen-api <xen-api@xxxxxxxxxxxxx>
  • From: Alberto Castrillo <castrillo@xxxxxxxxxx>
  • Date: Wed, 24 Jul 2013 22:12:13 +0200
  • Delivery-date: Wed, 24 Jul 2013 20:12:25 +0000
  • List-id: User and development list for XCP and XAPI <xen-api.lists.xen.org>

We use NFS as shared storage, and have faced some "VDI not available" issues with our VMs. I haven't been able to start a VM with the method of that URL in XCP 1.6 (in 1.1 and 1.5 beta worked). What worked for me:

- Detach the VDI from the VM
- Detach and forget the SR where the VDI is stored
- Reattach the forgotten SR (create new SR, give the same info that the detached SR, re-use the SR-UUID, ...)
- Reattach the VDI to the VM

El 24/07/2013, a las 21:10, hook escribió:

Past weekend (as usual O_o) we have experienced the issue in our XCP 1.6 production pool.
Shared  iSCSI storage was shutted down due to misconfigured UPS settings while XCP servers continued  to work.

When storage was returned to working state and reconnected to pool most VM did not boot with the same message - VDI is not available. 
Googling give me mentioned above method - forgot and reconnect VDI.
Result was even worser - the whole SR become unusable. 
Storage rescan gazered lot of errors like bad header on LVM and many other. 

Finally i've disconnect failed SR from pool, connect it back and SR become healthy (it looks so). But anyone VM was not start with disk from this SR and freeze during startup.
I did not find solution and restored most VMs from backup (long live VMPP!)

So, i just wanna say - be highly careful with VDI on shared storage repository in production environment)

2013/7/24 Brian Menges <bmenges@xxxxxxxxxx>
Have you tried the following?: http://community.spiceworks.com/how_to/show/14199-xcp-xen-cloud-platform-xenserver-the-vdi-is-not-available

- Brian Menges
Principal Engineer, DevOps
GoGrid | ServePath | ColoServe | UpStream Networks

-----Original Message-----
From: xen-api-bounces@xxxxxxxxxxxxx [mailto:xen-api-bounces@xxxxxxxxxxxxx] On Behalf Of Andres E. Moya
Sent: Wednesday, July 24, 2013 09:32
To: xen-api@xxxxxxxxxxxxx
Subject: [Xen-API] The vdi is not available

Guys need help trouble shooting this issue

I have an xcp 1.6 pool with 3 machines A,B, and C

I can migrate from A to B and B to A

WE cannot migrate from A or B to C, we also cannot shutdown a vm and start it up on C, when we do that we get the message The vdi is not available.

We have tried removing machine C from the pool and re joining and still have the issue.

when we first add host C to the pool it cannot load the nfs storage repository because we need to create a management interface from a bonded vlan that gets created after joining the pool.  After we create the interface and run a re plug on the storage repository it says its connected / re plugged.

Thanks for any help in advance

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Sergey Kruchatov
Xen-api mailing list

Alberto Castrillo
Ingeniería de Servicios
Parque Tecnológico, Ed. 103
Tel. 944 209 470
Zamudio - Vizcaya

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