[OpenAFS] Shutdown/startup of entire cell

[Jeffrey Altman]

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig93A55B25F5262331E757C1FF
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

You can shutdown the file servers without shutting down the
database servers.  During the outage the database servers
may lose the ability to elect a master.  Therefore you should
avoid making any database changes during the outage window.

I would run one file server with a single local disk partition
containing a readonly site for the root.afs and root.cell volumes.
This could be on one of the database servers.

I would shutdown any file server with network attached storage
for the length of the outage window.

I would also place a README file in the root.cell root directory
describe the outage for those that might check.

If you are going to shutdown the database servers.  Shut them down after
the fileservers and restart them before the file servers.

Jeffrey Altman

On 1/10/2013 10:50 PM, Garance A Drosihn wrote:
> Hi.
>=20
> Due to circumstances way beyond my control (a major network
> upgrade), I am going to need to shutdown our entire AFS cell
> this Saturday.  So, tha is less than 36 hours from now.
>=20
> Basically all our fileservers use disks which are connected
> via iSCSI, and the network upgrade may sever all network
> connectivity between the AFS fileservers and their vice*
> partitions for at least one hour, and possibly two.  Thus I
> expect it would be wise to shutdown all fileservers.
>=20
> And if I'm shutting down all our fileservers, I assume I
> should also shut down all database servers.  (True?)
>=20
> The one nice thing is that I can do a controlled shutdown, in
> whatever order seems appropriate.  So I have two questions:
>=20
> 1) When shutting down, should all database servers be shutdown
>    before the fileservers, or should the fileservers be shutdown
>    first?
>=20
> 2) When starting up, should the fileservers be started first,
>    or should the database servers be started first?
>=20
> I realize this will disrupt many of our AFS clients.  We're
> pretty much expecting we will reboot all of our systems by the
> time we're done with this.  It's safe to assume that I'm not
> happy about any of this, but I have no choice in the matter.
>=20
> Apologies for running to the list on this.  I expect the answer
> is somewhere in the documentation (or maybe even intuitively
> obvious), but this issue didn't come up until early this morning,
> and I've got about a dozen other (non-AFS) servers which are also
> effected by this network upgrade, so I'd like some confirmation
> of best practices for this case.
>=20


--------------enig93A55B25F5262331E757C1FF
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (MingW32)

iQEcBAEBAgAGBQJQ75HEAAoJENxm1CNJffh4ZjQIAKWbekiv6ydadsKVkDeJAOnn
DrC7BMPUVuLdh5APV9wl3JIkOVY/y0jVSz0QFjLhlGjnxjyDkVXnOEXekiXZa2yb
Q1W6i/sTSaiObVjxaajRhrIzjhe/A8OjwBiNDy+qj/f/T4Jx5Tukw+090n7XiRzT
nnlrBQxeA0OxwPVaExOjAUjPDarypUL9s9ZNMA1GizyzxI52RPsViATFXywyfw8j
UqQozZ2OZN3vm/AnuaOoLTEQkxBzON+/d6bgvKtd0Zk8v9S23jyFNDG8AW1lGzTn
Z2NrWVc3c1kGmBLKwWDNREdHWgLHDi3U5q6klqy0viUpAh+0OtZ8ZSxuZ/Uuvvo=
=GBsS
-----END PGP SIGNATURE-----

--------------enig93A55B25F5262331E757C1FF--