Mapping Global Zone Name Inside Solaris 10 Zone

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.

Log into global zone where local zone(s) reside.

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

Change /tmp size on Solaris 10 Zone

This blog describes the steps on how to change the tmp size on an existing Solaris 10 zone.

First log into global zone where local zone(s) reside using zlogin:

# zlogin –z (zone)

As root edit the /etc/vfstab:

# vi /etc/vfstab

Find the line in vfstab for the /tmp filesystem:

swap - /tmp tmpfs - yes size=512mb (this could be any value, 512 is example)

Change the value of size=512mb to the requested value (in MB):

swap - /tmp tmpfs - yes size=2048mb

Save the vfstab and exit back to the global zone.

To make the changes take effect the zone must be stopped and booted:

# zoneadm –z (zone) halt

# zoneadm –z (zone) boot

  Log back into local zone and confirm changes by reviewing df –h output:

# zlogin –z

# df –h|grep /tmp

swap                   2.0G     0K   2.0G     0%    /tmp