Pawel Jakub Dawidek
pjd at FreeBSD.org
Sat Apr 7 12:07:13 UTC 2007
After initial discussion on IRC, I'd like to propose an addition...
I want to use it with ZFS, but I thought it may be useful in general, so
here it goes:
I'd like to assign a unique ID to the system on first boot.
When system starts, /etc/rc.d/hostid script checks if /hostid file
exists, if it doesn't, it creates it via 'uuidgen > /hostid'.
It will also set kern.hostuuid sysctl to this value and first four bytes
of MD5(kern.hostuuid) will be stored in kern.hostid. It will allow to
If root file system is read-only, different uuid will be genrated on
each boot. Not sure if anything better can be done here.
As I said, I think it may be genrally useful. Imagine using it with
magic/variant symlinks, for example.
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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