Re: Documentation of the LVM metadata format

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Hi,

> My background is that ceph-volume activate does not work on non-systemd
 Linux distributions

Why not using the --no-systemd option during the ceph-volume activate
command?

The systemd part is only enabling and starting the service but the tmpfs
part should work if you're not using systemd

https://github.com/ceph/ceph/blob/master/src/ceph-volume/ceph_volume/devices/lvm/activate.py#L212

Dimitri

On Monday, April 19, 2021, Nico Schottelius <nico.schottelius@xxxxxxxxxxx>
wrote:

>
> The best questions are the ones that one can answer oneself.
> The great documentation on
>
> https://docs.ceph.com/en/latest/dev/ceph-volume/lvm/
>
> gives the right pointers. The right search term is "lvm list tags" and
> results into something like this:
>
> [15:56:04] server20.place6:~# lvs -o lv_tags
>   /dev/sda: open failed: No medium found
>   /dev/sdb: open failed: No medium found
>   LV Tags
>   ceph.block_device=/dev/ceph-26fdb7c4-17af-42af-8353-
> 06d95b0071c7/osd-block-bb63e9b6-b2d7-40d1-83ee-815262ae8b45,...
>
> If anyone is interested in upstream ceph-volume support for non-systemd
> Linux distributions to activate the ceph-osds, let me know.
>
> In any case, we'll publish our new style scripts on [0].
>
> Best regards,
>
> Nico
>
> [0] https://code.ungleich.ch/ungleich-public/ungleich-tools
>
> Nico Schottelius <nico.schottelius@xxxxxxxxxxx> writes:
>
> > Good morning,
> >
> > is there any documentation available regarding the meta data stored
> > within LVM that ceph-volume manages / creates?
> >
> > My background is that ceph-volume activate does not work on non-systemd
> > Linux distributions, but if I know how to recreate the tmpfs, we can
> > easily start the osd without systemd.
> >
> > Any pointers in the right direction are appreciated.
> >
> > Best regards,
> >
> > Nico
>
>
> --
> Sustainable and modern Infrastructures by ungleich.ch
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>
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