I've attached a tar file of the /var/log/sssd directory, which I hope will carry over. The logon delay is >10 seconds.

On Wed, Sep 20, 2023 at 3:45 PM Striker Leggette <striker@terranforge.com> wrote:
Is there a way you can share some SSSD logs showcasing the slow logins
and incomplete id results?

1. Edit /etc/sssd/sssd.conf and add "debug_level = 9" to all bracket
sections "[domain/...], [sssd], [pam], etc".

2. Restart SSSD and clear cache and logs:

   # systemctl stop sssd ; rm -rf /var/log/sssd/* /var/lib/sss/{db,mc}/*
; systemctl start sssd

3. Reproduce the error.

4. Archive the relevant configs:

   # tar czvpf /tmp/sssd-debug_$(hostname -s)_$(date +%F_%H%M%S).tar.gz
/var/lib/sss /var/log/{sssd,secure,messages,samba}
/etc/{ssh/sshd_config,pam.d,nsswitch.conf,krb5.c*,openldap,authselect,hosts,resolv.conf,sssd}

-----------------

Otherwise, I'd try a few tuning parameters to see if it helps to speed
things up:

[domain/example.com]
ignore_group_members = true
ldap_deref_threshold = 0

[pam]
pam_id_timeout = 30

[nss]
entry_cache_timeout = 10800

------------------

You might also considering mounting the SSSD cache in tmpfs to speed up
the responsiveness of SSSD for busy machines:

Add the following entry to the /etc/fstab file as a single line:

tmpfs /var/lib/sss/db/ tmpfs
size=300M,mode=0700,uid=sssd,gid=sssd,rootcontext=system_u:object_r:sssd_var_lib_t:s0
0 0

Restart SSSD afterwards:

   # systemctl stop sssd ; rm -rf /var/lib/sss/db/* ; mount
/var/lib/sss/db/ ; systemctl start sssd

On 9/20/23 16:32, Johnnie W Adams wrote:
> Hi, folks,
>
>      I've got a double-barrelled problem.
>
>      We're an RHEL shop with mostly RHEL 7 machines authenticating via
> sssd against LDAP which has, for a few weeks now, been undergoing very
> slow logons. Now we are also seeing incomplete information being
> returned from id -G. I've trimmed down a test case to eliminate every
> other variable I can find, and I'm left with sssd as my focal point.
>
>       Any thoughts on where to start with this very puzzling, very
> annoying problem.


--
John Adams
Senior Linux/Middleware Administrator  | Information Technology Services
+1-501-916-3010 | jxadams@ualr.edu | http://ualr.edu/itservices
UA Little Rock

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