[OpenAFS] Moving volumes between different cell and different realm names

Tue, 4 Oct 2016 16:28:00 +0200

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Hi,

i have the following situation:

old server infrastructure:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

1 Server: MIT Kerberos server REALM A, OpenLDAP server (without
principals), OpenAFS 1.6 server cell A

new server infrastructure:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

1. Server: FreeIPA 4 server REALM B

2. Server:  OpenAFS 1.6 Server cell B

old user client system setup:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Ubuntu 16.04, MIT Kerberos client using REALM A, OpenLDAP client,
OpenAFS 1.6 client, using cell A

plan of new user client system infrastructure (the user client hardware
wont change):

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D

Ubuntu 16.04, FreeIPA client 4 using REALM B, OpenAFS 1.6 client using
cell B

I read the thread:
https://lists.openafs.org/pipermail/openafs-info/2009-March/031004.html

So if i understand the thread and man pages correctly i could do the
following steps:

1. change entries CellServDB / ThisCell on the old OpenAFS server
(current config is Cell A) to Cell B.

2. restart OpenAFS bos server on the old server of Cell A.

3. On the old AFS Server ( now Cell B ), do a:

vos move -localauth (as super user from the old server) volumename from
old OpenAFS server (which is now Cell B) to new OpenAFS server (Cell B)

So i have some questions:

Why to use vos synvldb like mentioned in the  thread 031004  ? I think
vos move should change the vldb entries on the old and the new server ?

Whats up with the different REALMs (REALM A and B) on the old and the
new server ? I know there are two different afs/cell@REALM service
principals for the bos server to run, on the old server
afs/cell_a@REALM_A and on the new server afs/cell_b@REALM_B. So could i
simply move the volumes as root from the old openafs server changed from
cell A to cell B and realm A  to new server system cell B / realm B ?

regards,

Andreas

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