[PVE-User] LVM autoactivation failed with multipath over iSCSI

[Stefan M. Radman]

Hi Marco

Thanks for the suggestion.

I tried putting After=multipathd.service into lvm2-pvescan.service but that did not help.
It just started the multipathd.service before lvm2-pvescan.service but did not wait for discovery to finish.

That lvm2-pvscan.service Wants=multipathd.service is probably not really true because lvm2-pvscan.service will happily run without multipathd.service.
Creating such a dependency is usually not a good idea and it is not needed because the multipathd.service does start.
In such a case After= should be enough but isn't in this case (see above).

It seems to be a timing problem after all.

Stefan


> On Feb 3, 2020, at 11:20, Marco Gaiarin <gaio at sv.lnf.it> wrote:
>
> Mandi! Stefan M. Radman via pve-user
>  In chel di` si favelave...
>
>> My own workaround for the issue at hand is to delay the start of lvm2-pvscan by a few seconds (see below).
>> That gives multipathd more than enough time to complete its job.
>> It solves the problem for me (at least until the next upgrade) but there might be a smarter solution.
>
> Would be better to make 'lvm2-pvscan' service depends on 'multipathd'?
> Something like (NOT TESTED!) adding in:
>
> /etc/systemd/system/lvm2-pvscan.service.d/wait-multipath.conf
>
> the rows:
> [Unit]
> After=multipathd.service
> Wants=multipathd.service
>
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