sysidcfg replacement on omnios

A very nice feature on Solaris was the possibility to initialize new zones with a sysidcfg file. This does not exist on omnios. With kayak, omnitis deployment server, a way to run postboot scripts was created. The way is the file /.initialboot. This is just a shell script which gets executed on the first boot and gets removed afterwards. Nothing much but already very useful to make the initial setup for dns and the ip.

A little example. I have a zone foo1 with a vnic barnic1. I want to setup dns and dhcp for the interface. The zone is installed in /zones/foo1/ so we have to root file system mounted as /zones/foo1/root.

We create the /.initialboot file (which ends up as /zones/foo1/root/.initialboot with the following content

ipadm create-if foonic1
cp /etc/nsswitch.dns /etc/nsswitch.conf
ipadm create-addr -T dhcp foonic1/ipv4
echo "nameserver" >> /etc/resolv.conf

Now boot the zone and after 5minutes or so everything is setup and ready to go. Makes it really easy.