Quoting Dieter Klünter <die...@dkluenter.de>:
slapd[1668]: GSSAPI Error: Unspecified GSS failure. \
Minor code may provide more information \
(Server ldap/localh...@example.com not found in Kerberos database)
[...]
The slapd user must be able to read the relevant keytab.
Already covered: I do that by giving the openldap group read access to it.
Otherwise, /etc/hostname is okay, 'hostnamectl status' gives the same,
there's nothing weird in /etc/hosts and the DNS forward and reverse
records give all the same answers.
Cheers,
Jaap