All,
Basically here is the realm command we use to join the appropriate regional
AD domain:
realm join -v --automatic-id-mapping=no
--computer-ou="OU=Servers,OU=UNIX,DC=$SUPPORTREGION,DC=COMPANY,DC=COM"
--user-principal="host/`hostname --fqdn`@$JOINDOMAIN" $JOINDOMAIN
As part of this, realm join internally runs the following command:
* /usr/bin/sh -c /usr/bin/authselect select sssd with-mkhomedir --force &&
/usr/bin/systemctl enable oddjobd.service && /usr/bin/systemctl start
oddjobd.service
But that sets /etc/pam.d/password-auth and /etc/pam.d/system-auth to a
sub-optimal PAM stack. I.e., not what we desire.
For example, 99.9% of our users are in AD. So we want to run pam_sssd
*before* pam_unix.
We are very comfortable with testing and debugging PAM stacks. We have a
stable, tested PAM stack that works great -- ever since RHEL7.
Basically, after the 'realm join' above is done, we have to overwrite
/etc/pam.d/{system-auth,password-auth,postlogin} with what we desire.
If 'realm join' can't be convinced to not run authselect, we're ok with
creating a custom/profile authselect profile with what we want. And then
convince realm join to run:
authselect select custom/profile
Instead of the above authselect select sssd
Prior to running 'realm join', I have to drop down a /etc/realmd.conf file
so that the 'realm join' behaves as I want it to. Is there any option in
realmd.conf to not run authselect or tailor the authselect command? Or may
a flag on the 'realm discover' command line?
I don't remember any of these problems with realm join on RHEL7. Maybe it
was running authconfig inappropriately as well -- and I just never noticed,
because I over-wrote with desired PAM stack?
Spike
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