Thanks for filing this bug in Ubuntu. Where exactly do you see these error messages about the filesystem being read only?
I installed both packages, configured a realm, added a principal, and I can kinit just fine, and I see the requests in the system logs: /var/log/auth.log:Dec 6 12:25:02 04-57 krb5kdc[732]: AS_REQ (8 etypes {18 17 20 19 16 23 25 26}) 10.0.5.10: NEEDED_PREAUTH: ubuntu@MAAS for krbtgt/MAAS@MAAS, Additional pre-authentication required /var/log/auth.log:Dec 6 12:25:04 04-57 krb5kdc[732]: AS_REQ (8 etypes {18 17 20 19 16 23 25 26}) 10.0.5.10: ISSUE: authtime 1512563104, etypes {rep=18 tkt=18 ses=18}, ubuntu@MAAS for krbtgt/MAAS@MAAS ** Changed in: krb5 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1736596 Title: krb5kdc/kadmind miss /var/log inside ReadWriteDirectories in sytemd unit files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/krb5/+bug/1736596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs