Mailinglist Archive: opensuse-factory (437 mails)

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Re: [opensuse-factory] Re: [opensuse-buildservice] register static UID/GID on openSUSE?

On Monday 2015-04-20 04:45, Tim Serong wrote:

As long as process credentials are not 64/128-bit UIDs similar to NTSIDs,
services ought to cope with different numerical UIDs. NFS made the jump
with idmapd, so I am sure ceph can come up with something too. Perhaps
even reuse idmapd.

I agree. There are still some use cases where same uids are desirable
nevertheless. For example to be able to reuse a file system with
data on it on different installations.

That's exactly why the ceph project wants a static UID - so you can
easily hot swap a disk from one node in the cluster to another node.

That seems bogus.

The data that people generally share in networked fashion is user
data (rather than, say, operating system data).

These user files (hereby by definition) already have consistent UID
allocation, e.g. because the participating import nodes all used a
centrally-administered database.

The OS files are naturally a jumble, but that is ok, because they are
generally not shared. If, for whatever reason, they are to be shared,
then one would have to make sure that *all* system user UIDs are also
consistently allocated — which is not something that will evaluate to
`true` in most installations however. So, giving _just ceph_ a fixed
static UID is nothing but a drop on a hotstone.
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