Sometimes when I am inside of a zone I want to know what global zone its attached to. By default this was not visible but with a little effort below we can set it up so the global zone is visible within the zone.
Using zonecfg, configure the following for each zone:
# zonecfg -z (zone)
add fs
set type=lofs
set options=ro
set special=/etc/nodename
set dir=/etc/globalname
end
verify
commit
exit
Create mount point within local zone directory structure:
# touch /zones/(zone)/root/etc/globalname
Mount lofs file system manually:
# mount -F lofs -o ro /etc/nodename /zones/(zone)/root/etc/globalname (or path where the root of the zone resides)
Confirm local zone can access file:
# zlogin (zone) cat /etc/globalname
