A3 Namespaces: 3 environments on one node It's like "I'm my own Grandpa" but instead "I'm my own CPU server!"
This demo uses the 9queen (created in the final part of the first tutorial) to create a normal local fossil root Bell Labs terminal - but it can cpu into 9front by dialing itself.
Boot 9queen and choose option 4 for interactive boot
[HOST] qemu -hda 9queen -net nic -net user,hostfwd=tcp::2564-:564,hostfwd=tcp::17010-:17010,hostfwd=tcp::17020-:17020 -cdrom 9front-*.iso
proceed through interactive boot and hit enter for all responses except as specified:
tgzfs=tools.tgz getrootfs=srv
At the next prompt, asking for the path to bootsrv, drop to rc and set up the cd srv:
rc 9660srv -f /dev/sdD0/data boot exit
Then continue responding to prompts with enter for the default except as mentioned: bootsrv=/srv/boot unprivileged=no plan9rc will start the cpurc from the 9front cd and print a few messages to the console, then return you to the prompt.
rerun plan9rc to start up our local Bell Labs terminal.
mv /srv/boot /srv/front . /bin/plan9rc
This runthrough of plan9rc we will answer clear to almost all questions. respond "clear" to all prompts until prompted about file server attach for root fs. Press enter here to accept the default valuie of "local". Continue accepting the defaults until:
initscript=clear rootstart=terminal
At this point the termrc from the labs install to the local disk takes over and the console becomes a standard bell labs terminal GUI.
Accessing labs environment and 9front environment from the service namespace
cpu or drawterm into port 17020 service namespace
Inside the service namespace you will open two windows. We will reroot to a different namespace within each. In the first we will reroot to labs namespace
mv /srv/boot /srv/labs rerootwin labs service=con . $home/lib/profile grio -c 0x54321
In the second we will reroot to 9front namespace
mv /srv/front /srv/boot rerootwin -f boot service=con . $home/lib/profile aux/listen1 -t tcp!*!17010 /bin/cpu -R & grio
Now there are independent namespaces in each window. You will notice that in all 3 namespaces, the "Hub" menu option is connected to the same hubfs already.
Cpu to a different namespace on the same machine
Inside the labs GUI namespace
cpu -h localhost rio
The end result is like having a separate 9front cpu server on your grid, but it just happens to be located inside your normal terminal. If the user has followed the tutorials through this point, it should be easy to connect to the main hubfs from this namespace and use cpns to change namespace between the different environments.