[DRBD-user] DM to Linstor migration issue

[Yannis Milios]

Hi Roland,


> Do you still have the migration script? Could you post the part for that
> resource? Would be interesting which value the script tried to set.
>
>
Yes, I do. You can find it here
https://privatebin.net/?a12ad8f1c97bcb15#XLlAENrDGQ7OYn/Mq4Uvq7vwZuZ+jyjRBLIUPMepYgE=

The problem in my case, was not just in one resource, but on all of them.
In short, none of the resources could  come online. To fix that, I had to
resize the volume definitions for each resource.


> Anything uncommon? Did you change the max number of peers or anything?
>

Not sure to be honest. I have done several modifications on this cluster
over the time,but perhaps I can give you some clues, maybe the answer is
somewhere in there ... :-)

- Initially, all 3 nodes were using ZFS Thin as a DRBD backend. Now, 2
nodes are using LVM Thin, and 1 ZFS.
- All resources were created automatically by drbdmanage-proxmox plugin,
sometimes with redundancy 2 and sometimes with redundancy 3 (I was playing
around with this option).
- There were occasions, where a resource which initially  was created with
drbdmanage-proxmox plugin with redundancy 2, later it was manually assigned
to the 3rd node, manually by using drbdmanage command, in order to have
redundancy of 3.
- IIRC in only one occasion, I had to manually export DRBD metadata from a
resource, modify the max-peers option from 1 to 7 and then restore import
it back. Not sure why it was set to 1 in the first place, but yes I had to
do this modification, otherwise the peers were refusing to sync.

It is good hat there is a fix and you guys managed to migrate. I still
> wonder why this did not trigger in my tests.
>

 As you can see from the above, perhaps my setup is not the ideal to go to
conclusions, but still, I would accept if some of the resources had failed,
but not all ?!. Maybe Roberto can also give some tips from his setup?

Thanks for the good work!

Yannis
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