minimal docker config for running a kerberized apache
create a SPN for your container on your host - I assume that your host is already kerberized
sudo kinit <domain-admin>
sudo export KRB5_KTNAME=FILE:./conf/HTTP.keytab
sudo net ads keytab CREATE
sudo net ads keytab ADD HTTP
sudo unset KRB5_KTNAME
cp /etc/krb5.conf ./conf