Re: [HTCondor-users] write and execute from different computer in grid

[Michael V Pelletier <Michael.V.Pelletier@xxxxxxxxxxxx>]

From: René Labounek <xlabou01@xxxxxxxxxxxxxxxxxx>
Date: 03/17/2016 09:25 AM

> I think I have found a problem. Based on chapter
2.5.3 in next URL, UIDs 
> and GIDs must agree between computers. and they are not. Even not
for 
> the condor user. Can I manually rewrite uid and gid for condor user
on 
> one computer without breaking the HTcondor installation?

Changing the condor uid/gid is not as hard as you
might think.

You'll want to shut down the service first, of course.
Next, update the
user and group ID numbers to your desired value.

And the RPM package handily gives you a list of files
and directories
that need to be owned by the condor user and group.
For 8.2:

rpm -qlv condor | grep '[0-9] condor'

(That'll need to include all the other packages in
the 8.4 release,
such as condor-procd, )

You've got /var/lib/condor and its subdirectories,
/var/lock/condor,
/var/log/condor, and /var/run/condor in 8.2. Then
you just do
a chown -R condor:condor on those directories, which
will use the
new UID and GID values you updated in /etc/passwd
and /etc/group,
and then restart the service.

You might also have a /tmp/hsperfdata_condor directory,
depending
on your system, but you can just remove it rather
than chowning it.

If you want to be really sure, you can use find on
your local
filesystems on a given machine:

find / -fstype ext4 -uid <olduid> -print

If you find anything outside of the RPM's purview,
add it to the
chown list or remove it. Since it's a privilege separation
account,
though, you really shouldn't find anything outside
the RPM's
purview.

And then you just fire up the service again, and away
you go.

        -Michael Pelletier.
_