[DRBD-user] linstor controller vm in HA on proxmox: missing links in /dev/drbd/by-res after boot

[Roland Kammerer]

On Wed, Sep 05, 2018 at 03:35:44PM +0200, Roberto Resoli wrote:
> Il 05/09/2018 09:58, Roberto Resoli ha scritto:
> > 
> > [Unit]
> > After=
> > After=network-online.target drbd.service
> 
> A correction: according to
> man 5 systemd.unit :
> "Note that dependencies (After=, etc.) cannot be reset to an empty list, so
> dependencies can only be added in drop-ins. If you want to remove
> dependencies, you have to override the entire
> unit."
> 
> I have re-edited linsor-satellite unit ovverride as follows:
> 
> [Unit]
> After=drbd.service
> 
> [Service]
> ExecStart=
> ExecStart=/usr/share/linstor-server/bin/Satellite
> --logs=/var/log/linstor-satellite --config-directory=/etc/linstor
> --keep-res=vm-200

I thought we only have to handle the case for the resource where the
controller VM is stored to. My reasoning was that basically both
services can start at the same time. The important res is the one from
the controller VM. It is not deleted and certainly brought up by
drbd.service. For the rest I thought "don't care" is good enough. If the
res files are there, drbd.service brings them up, if not, the satellite
brings them up (actually does an adjust) when first contacted by the
controller.

So at least I thought that after the first contact from the controller,
all resources should be up.

For now, maybe for ever, we should just serialize startup the way you
did it. That is quite obvious a solution, but I thought it is not
necessary. Having two services operate on the same files probably is not
a good idea anyways.

So thank you for testing this whole thing, I will add the "After" part
to the doc.

Regards, rck