sigh, this looks like this is being caused by systemd. using iwatchnotify, i see sssd is doing everything it's supposed too. but then systemd comes by and mounts a new tmpfs on TOP of the /run/user/${uid} directory, then masking the krb5cc file.
tmpfs on /run/user/966406121 type tmpfs (rw,nosuid,nodev,relatime,size=554272k,nr_inodes=138568,mode=700,uid=966406121,gid=966400513,inode64) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2072581 Title: sssd 2.9.4-1 fails to populate krb creds when set to FILE:/run/user/uid/krb5cc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2072581/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs