ISO_DOMAIN by NFS behavior (if NFS is unavailable)
Hello List, i have just tried to backup and replace my ovirt-engine. My ovir-engine also provides the NFS share for the ISO Images. However, if i take that nfs share away my ovirt-nodes and cluster seems to fall apart. I get those typical NFS stale file handle symthoms. I can not umount or remount the NFS dirs anymore. Any idea how i can fix this or better: protect myself from such an NFS failure? Thanks, Mario
This is an S/MIME signed message ------3CF1674998BAF64F1273F26CE2F4D37A Content-Type: multipart/mixed; boundary="----=_Part_23237_2106152015.1412163565487" ------=_Part_23237_2106152015.1412163565487 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Hello Mario, you can set the ISO_DOMAIN to maintenance and then detach it from the cluster. All nodes will umount this NFS share when detaching it. You can do your backup etc. regards Michael Am 01.10.2014 um 12:50 schrieb ml ml:
Hello List,
i have just tried to backup and replace my ovirt-engine.
My ovir-engine also provides the NFS share for the ISO Images.
However, if i take that nfs share away my ovirt-nodes and cluster seems to fall apart.
I get those typical NFS stale file handle symthoms.
I can not umount or remount the NFS dirs anymore.
Any idea how i can fix this or better: protect myself from such an NFS failure?
Thanks, Mario _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
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------3CF1674998BAF64F1273F26CE2F4D37A--
Hello Michael, On Wed, Oct 1, 2014 at 1:39 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
you can set the ISO_DOMAIN to maintenance and then detach it from the cluster. All nodes will umount this NFS share when detaching it. You can do your backup etc.
unfortunatelly this does not help if my ovirt-engine dies over sudden. If i turn of my ovirt-engine the NFS ISO Domain goes down and i can not set it to maintaince mode anymore. Any other ideas?
This is an S/MIME signed message ------C55AB17DF042CAAA1C394F8CE13C2D18 Content-Type: multipart/mixed; boundary="----=_Part_23281_127183974.1412167227429" ------=_Part_23281_127183974.1412167227429 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hello Mario, do it before you turn of your engine and leave it detached, because normally it is not needed all the time. Or create a new ISO_DOMAIN storage at a more save place. Regards Michael Am 01.10.2014 um 14:21 schrieb ml ml:
Hello Michael,
On Wed, Oct 1, 2014 at 1:39 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
you can set the ISO_DOMAIN to maintenance and then detach it from the cluster. All nodes will umount this NFS share when detaching it. You can do your backup etc.
unfortunatelly this does not help if my ovirt-engine dies over sudden.
If i turn of my ovirt-engine the NFS ISO Domain goes down and i can not set it to maintaince mode anymore.
Any other ideas?
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Hello Michael, this cant be the answer. Maybe NFS is the wrong tool for the wrong purpose in this case then. I am talking about disaster recovery, but you only have "soft" failures in mind. On Wed, Oct 1, 2014 at 2:40 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
do it before you turn of your engine and leave it detached, because normally it is not needed all the time. Or create a new ISO_DOMAIN storage at a more save place.
Regards Michael
Am 01.10.2014 um 14:21 schrieb ml ml:
Hello Michael,
On Wed, Oct 1, 2014 at 1:39 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
you can set the ISO_DOMAIN to maintenance and then detach it from the cluster. All nodes will umount this NFS share when detaching it. You can do your backup etc.
unfortunatelly this does not help if my ovirt-engine dies over sudden.
If i turn of my ovirt-engine the NFS ISO Domain goes down and i can not set it to maintaince mode anymore.
Any other ideas?
I had the same challenge and ended up taking the service off my hosted-engine and putting it elsewhere as a workaround. But if I remember right you can still set maintenance mode when the hosted-engine is down, just can't run vm-status? -----Original Message----- From: users-bounces@ovirt.org [mailto:users-bounces@ovirt.org] On Behalf Of ml ml Sent: October-01-14 7:03 AM To: Michael Keller Cc: users@ovirt.org Subject: Re: [ovirt-users] ISO_DOMAIN by NFS behavior (if NFS is unavailable) Hello Michael, this cant be the answer. Maybe NFS is the wrong tool for the wrong purpose in this case then. I am talking about disaster recovery, but you only have "soft" failures in mind. On Wed, Oct 1, 2014 at 2:40 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
do it before you turn of your engine and leave it detached, because normally it is not needed all the time. Or create a new ISO_DOMAIN storage at a more save place.
Regards Michael
Am 01.10.2014 um 14:21 schrieb ml ml:
Hello Michael,
On Wed, Oct 1, 2014 at 1:39 PM, Michael Keller <mkeller@psi.de> wrote:
Hello Mario,
you can set the ISO_DOMAIN to maintenance and then detach it from the cluster. All nodes will umount this NFS share when detaching it. You can do your backup etc.
unfortunatelly this does not help if my ovirt-engine dies over sudden.
If i turn of my ovirt-engine the NFS ISO Domain goes down and i can not set it to maintaince mode anymore.
Any other ideas?
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