Comment 22 for bug 1349949

And from MAAS it can be done by adding the following to /etc/maas/preseeds/curtin_userdata

late_commands:
  mongo_01: curtin in-target -- sh -c '/bin/echo :msg, contains, \"authenticate db:\" \~ >> /etc/rsyslog.d/16-mongohush.conf'
  mongo_02: curtin in-target -- sh -c '/bin/echo :msg, contains, \"warning:\ No such role, \" \~ >> /etc/rsyslog.d/16-mongohush.conf'
  mongo_03: curtin in-target -- sh -c '/bin/echo :msg, contains, \"command juju.\$cmd command:\" \~ >> /etc/rsyslog.d/16-mongohush.conf'
  mongo_04: curtin in-target -- sh -c '/bin/echo :msg, contains, \"command presence.\$cmd command:\" \~ >> /etc/rsyslog.d/16-mongohush.conf'