Using ISC-DHCPD to renew DHCP leases in an Active Directory domain. This requires using ktutil to generate a keytab for DHCPd to use in order to update secure dynamic DNS.
What I need to do is to be able to auto-renew the credential in the keytab. I'm aware of krenew and kinit -R, but what I need is something to automatically refresh them (indefinitely). I have near zero experience with bash or creating daemons.
I see that DHCPd is running as root, and I do have a Kerberos cache file at /tmp/krb5cc_0.
I'm using the Raspbian distribution.