[ClusterLabs] DRBD + VDO HowTo?

Mon May 17 01:57:32 EDT 2021

Did you try VDO in sync-mode for the case the flush-fua
stuff isn't working through the layers?
Did you check that VDO-service is disabled and solely under
pacemaker-control and that the dependencies are set correctly?

Klaus

On 5/17/21 6:17 AM, Eric Robinson wrote:
>
> Yes, DRBD is working fine.
>
> *From:* Strahil Nikolov <hunter86_bg at yahoo.com>
> *Sent:* Sunday, May 16, 2021 6:06 PM
> *To:* Eric Robinson <eric.robinson at psmnv.com>; Cluster Labs - All 
> topics related to open-source clustering welcomed <users at clusterlabs.org>
> *Subject:* RE: [ClusterLabs] DRBD + VDO HowTo?
>
> Are you sure that the DRBD is working properly ?
>
> Best Regards,
>
> Strahil Nikolov
>
>     On Mon, May 17, 2021 at 0:32, Eric Robinson
>
>     <eric.robinson at psmnv.com <mailto:eric.robinson at psmnv.com>> wrote:
>
>     Okay, it turns out I was wrong. I thought I had it working, but I
>     keep running into problems. Sometimes when I demote a DRBD
>     resource on Node A and promote it on Node B, and I try to mount
>     the filesystem, the system complains that it cannot read the
>     superblock. But when I move the DRBD primary back to Node A, the
>     file system is mountable again. Also, I have problems with
>     filesystems not mounting because the vdo devices are not present.
>     All kinds of issues.
>
>     *From:* Users <users-bounces at clusterlabs.org
>     <mailto:users-bounces at clusterlabs.org>> *On Behalf Of *Eric Robinson
>     *Sent:* Friday, May 14, 2021 3:55 PM
>     *To:* Strahil Nikolov <hunter86_bg at yahoo.com
>     <mailto:hunter86_bg at yahoo.com>>; Cluster Labs - All topics related
>     to open-source clustering welcomed <users at clusterlabs.org
>     <mailto:users at clusterlabs.org>>
>     *Subject:* Re: [ClusterLabs] DRBD + VDO HowTo?
>
>     Okay, I have it working now. The default systemd service
>     definitions did not work, so I created my own.
>
>     *From:* Strahil Nikolov <hunter86_bg at yahoo.com
>     <mailto:hunter86_bg at yahoo.com>>
>     *Sent:* Friday, May 14, 2021 3:41 AM
>     *To:* Eric Robinson <eric.robinson at psmnv.com
>     <mailto:eric.robinson at psmnv.com>>; Cluster Labs - All topics
>     related to open-source clustering welcomed <users at clusterlabs.org
>     <mailto:users at clusterlabs.org>>
>     *Subject:* RE: [ClusterLabs] DRBD + VDO HowTo?
>
>     There is no VDO RA according to my knowledge, but you can use
>     systemd service as a resource.
>
>     Yet, the VDO service that comes with thr OS is a generic one and
>     controlls all VDOs - so you need to create your own vdo service.
>
>     Best Regards,
>
>     Strahil Nikolov
>
>         On Fri, May 14, 2021 at 6:55, Eric Robinson
>
>         <eric.robinson at psmnv.com <mailto:eric.robinson at psmnv.com>> wrote:
>
>         I created the VDO volumes fine on the drbd devices, formatted
>         them as xfs filesystems, created cluster filesystem resources,
>         and the cluster us using them. But the cluster won’t fail
>         over. Is there a VDO cluster RA out there somewhere already?
>
>         *From:* Strahil Nikolov <hunter86_bg at yahoo.com
>         <mailto:hunter86_bg at yahoo.com>>
>         *Sent:* Thursday, May 13, 2021 10:07 PM
>         *To:* Cluster Labs - All topics related to open-source
>         clustering welcomed <users at clusterlabs.org
>         <mailto:users at clusterlabs.org>>; Eric Robinson
>         <eric.robinson at psmnv.com <mailto:eric.robinson at psmnv.com>>
>         *Subject:* Re: [ClusterLabs] DRBD + VDO HowTo?
>
>         For DRBD there is enough info, so let's focus on VDO.
>
>         There is a systemd service that starts all VDOs on the system.
>         You can create the VDO once drbs is open for writes and then
>         you can create your own systemd '.service' file which can be
>         used as a cluster resource.
>
>
>         Best Regards,
>
>         Strahil Nikolov
>
>             On Fri, May 14, 2021 at 2:33, Eric Robinson
>
>             <eric.robinson at psmnv.com <mailto:eric.robinson at psmnv.com>>
>             wrote:
>
>             Can anyone point to a document on how to use VDO
>             de-duplication with DRBD? Linbit has a blog page about it,
>             but it was last updated 6 years ago and the embedded links
>             are dead.
>
>             https://linbit.com/blog/albireo-virtual-data-optimizer-vdo-on-drbd/
>             <https://linbit.com/blog/albireo-virtual-data-optimizer-vdo-on-drbd/>
>
>             -Eric
>
>             Disclaimer : This email and any files transmitted with it
>             are confidential and intended solely for intended
>             recipients. If you are not the named addressee you should
>             not disseminate, distribute, copy or alter this email. Any
>             views or opinions presented in this email are solely those
>             of the author and might not represent those of Physician
>             Select Management. Warning: Although Physician Select
>             Management has taken reasonable precautions to ensure no
>             viruses are present in this email, the company cannot
>             accept responsibility for any loss or damage arising from
>             the use of this email or attachments.
>
>             _______________________________________________
>             Manage your subscription:
>             https://lists.clusterlabs.org/mailman/listinfo/users
>             <https://lists.clusterlabs.org/mailman/listinfo/users>
>
>             ClusterLabs home: https://www.clusterlabs.org/
>             <https://www.clusterlabs.org/>
>
>         Disclaimer : This email and any files transmitted with it are
>         confidential and intended solely for intended recipients. If
>         you are not the named addressee you should not disseminate,
>         distribute, copy or alter this email. Any views or opinions
>         presented in this email are solely those of the author and
>         might not represent those of Physician Select Management.
>         Warning: Although Physician Select Management has taken
>         reasonable precautions to ensure no viruses are present in
>         this email, the company cannot accept responsibility for any
>         loss or damage arising from the use of this email or attachments.
>
>     Disclaimer : This email and any files transmitted with it are
>     confidential and intended solely for intended recipients. If you
>     are not the named addressee you should not disseminate,
>     distribute, copy or alter this email. Any views or opinions
>     presented in this email are solely those of the author and might
>     not represent those of Physician Select Management. Warning:
>     Although Physician Select Management has taken reasonable
>     precautions to ensure no viruses are present in this email, the
>     company cannot accept responsibility for any loss or damage
>     arising from the use of this email or attachments.
>
>     Disclaimer : This email and any files transmitted with it are
>     confidential and intended solely for intended recipients. If you
>     are not the named addressee you should not disseminate,
>     distribute, copy or alter this email. Any views or opinions
>     presented in this email are solely those of the author and might
>     not represent those of Physician Select Management. Warning:
>     Although Physician Select Management has taken reasonable
>     precautions to ensure no viruses are present in this email, the
>     company cannot accept responsibility for any loss or damage
>     arising from the use of this email or attachments.
>
> Disclaimer : This email and any files transmitted with it are 
> confidential and intended solely for intended recipients. If you are 
> not the named addressee you should not disseminate, distribute, copy 
> or alter this email. Any views or opinions presented in this email are 
> solely those of the author and might not represent those of Physician 
> Select Management. Warning: Although Physician Select Management has 
> taken reasonable precautions to ensure no viruses are present in this 
> email, the company cannot accept responsibility for any loss or damage 
> arising from the use of this email or attachments.
>
> _______________________________________________
> Manage your subscription:
> https://lists.clusterlabs.org/mailman/listinfo/users
>
> ClusterLabs home: https://www.clusterlabs.org/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.clusterlabs.org/pipermail/users/attachments/20210517/793810f0/attachment-0001.htm>