OS upgrade of Kerberos server

[Matt Garman]

I'm planning on upgrading the OS of our primary Kerberos server, from
CentOS 5.7 to CentOS 6.5 (essentially the same as RHEL).  I'll be
using the vendor-provided MIT Kerberos packages.  Old version is
1.6.1-62, new version is 1.10.3-10.

We have two slave KDCs, both of them are already on the newer OS and
Kerberos versions.  As far as I can tell, the slaves appear to work,
as I can disable the krb5kdc service on the primary, and nothing
breaks.

I just want to do a sanity check that I'm not overlooking any
important step.  I think I can basically follow the instructions
provided here:
    http://web.mit.edu/kerberos/www/krb5-1.2/krb5-1.2.5/doc/install.html
but with the exceptions that all the config files will be copied over
from the old install:
    - /etc/krb5.conf
    - /etc/krb5.keytab
    - /var/kerberos/krb5kdc/kdc.conf
    - /var/kerberos/krb5kdc/kadm5.acl

And obviously, instead of creating a new database, I'll re-create the
old database from a dump.

Am I missing anything?  Is it safe to copy the old
/var/kerberos/krb5kdc directory wholesale?

It seems fairly straightforward, perhaps too easy, so just looking for
any words of wisdom that could save me some grief.

Thanks!
Matt