You can read more about this in the following BZ, but this should not prevent a user from acquiring new credentials.
https://bugzilla.redhat.com/show_bug.cgi?id=1669607
If you are hitting a KCM quota, a failure message will be logged stating the affected quota in the sssd_kcm.log file. I suspect it is not 'max_uid_ccaches' as this is the total number of unique credentials caches per user, perhaps 'max_ccache_size' is the one being triggered.
Thanks, -Justin
On Mon, Nov 23, 2020 at 6:46 AM Winberg Adam Adam.Winberg@smhi.se wrote:
With KCM and gssproxy we often see a long list of credentials when doing a 'klist':
[user.u@lxserv2114 ~]$ klist Ticket cache: KCM:17098:66803 Default principal: user.u@AD
Valid starting Expires Service principal 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: 01/01/1970 00:00:00 01/01/1970 00:00:00 Encrypted/Credentials/v1@X-GSSPROXY: and so on...
The actual gssproxy credentials at /var/lib/gssproxy/clients/ does not correspond with this output, it only contains what could be expected - a TGT and maybe some service tickets.
The ever growing 'klist' list of credentials is a problem, after a while the user can no longer get any new credentials and therefore has no access to its NFS homedir (sec=krb5). I'm guessing it's the 'max_uid_ccaches' option in sssd-kcm that prevents this.
What is going on here - have we configured gssproxy/kcm wrong or is this a bug?
Regards
Adam
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