Re: [9fans] the JD project: little tiny liinux that is a driver for Plan 9, boots in seconds.

["David Leimbach" <leimy2k@gmail.com>]

Hmmm WWJDD...

What Would Jack Daniels Do?



On 12/20/06, Paul Lalonde <plalonde@telus.net> wrote:
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> Yowza.  Someone slipped something into Ron's coffee!
>
> Ron - any chance of the /dev/fb based drawterm making its way to more
> general distribution?
>
> Thanks,
>      Paul
>
> On 20-Dec-06, at 2:19 PM, ron minnich wrote:
>
> > It is called JD for a reason  ...
> >
> > anyway ...
> >
> > on sources/xen/xen3/xentest.tgz is the latest.
> >
> > here is what it does
> > boots a minimal linux to a bash prompt. You type
> > xend start
> > xm create hanska
> > this in turn boots a cpu server under xen which tries to mount from an
> > fs, which does not exist, but hey ... it can start up a plan 9
> > instance. And give it an IP from DHCP. And it tries and fails to mount
> > an fs from somewhere. And if finds the block device (sd00). This is
> > close.
> >
> > The linux will nat for you.
> >
> > In theory, I should be able to mount 9grid.net, have not tried this
> > yet.
> >
> > The file is a mere 62M compressed (sorry!) but we're trying. I had to
> > pull in lots of shit because the xen scripts are a mix of python and
> > bash. The bash scripts, if written in python, would not need all the
> > shit. Long term, they should all be python, and I am sure that you
> > folks are chomping at the bite to rewrite them, python being such a
> > readable, simple, easy to bug-insert language (what's the oppose of
> > debug? Where you insert a bug just be removing whitespace? maybe embug
> > -- for embedding a bug. )
> >
> > here is my grub.conf entry for it -- see, I'm getting user-friendly
> > this time around.
> >
> > title           tiny horrible xen
> > root            (hd0,5)
> > kernel          /boot/xen-3.0.3-1-i386.gz
> > module          /boot/vmlinuz-2.6.18-3-xen-686 root=/dev/hda6 ro
> > console=tty0
> > module          /boot/initrd.img-2.6.18-3-xen-686
> >
> > So, what did it take to make this work?
> >
> > Oh, not much. Xen reported hotplug failing, in a way calculated to
> > confuse me.
> >
> > But, thinks I, I need udev. But, udev won't start without syslog in
> > there. Honest, strace doesn't lie.
> >
> > So, in the end, I added:
> > [root@q rminnich]# ls /xentest/etc/init.d/
> > functions  syslog
> > [root@q rminnich]#
> >
> > [root@q rminnich]# ls /xentest/etc/
> > blkid.tab      dhcpd.conf  hosts    hotplug.d  localtime  passwd
> > syslog.conf  xen
> > blkid.tab.old  fstab       hotplug  init.d     mtab       services
> > udev
> > [root@q rminnich]#
> >
> > rm /etc/mtab; ln -s /proc/mounts /etc/mtab
> >
> > [root@q rminnich]# ls /xentest/lib | wc
> >    125     125    193
> > [root@q rminnich]# ls /xentest/usr/lib
> > libsysfs.so.1  libz.so.1  libz.so.1.2.3  python2.4  xen-3.0.3-1
> > xen-common  xen-default
> > [root@q rminnich]# ls /xentest/bin
> > basename  hanska   mv         sed      umount       xenctx
> > xenstore-read
> > bash      ip       netfix     sh       usleep       xend
> > xenstore-rm
> > cat       killall  ps         sleep    xc_restore   xenmon.py
> > xenstore-write
> > cp        less     pygrub     stat     xc_save
> > xenperf           xentop
> > cut       logger   readlink   strace   xc_shadow    xenstore-
> > chmod    xentrace
> > dhcpd     lomount  readnotes  sync     xenbaked     xenstore-control
> > xentrace_format
> > drawterm  ls       reset      tcpdump  xen-bugtool  xenstored
> > xentrace_setmask
> > ed        mkdir    rm         touch    xencons      xenstore-exists
> > xentrace_setsize
> > expr      mktemp   rmdir      tr       xenconsole   xenstore-
> > list     xm
> > grep      mount    runme      true     xenconsoled  xenstore-ls
> > [root@q rminnich]# ls /xentest/usr/bin/
> > awk  dirname  env  python
> > [root@q rminnich]# ls /xentest/sbin/
> > brctl        initlog           jfs_fscklog  nologin  udevcontrol
> > udevstart.static
> > consoletype  insmod            jfs_logdump  pidof    udevd
> > udev.static
> > depmod       iptables          klogd        sh       udev_run_devd
> > getty        iptables-restore  logsave      sulogin  udev_run_hotplugd
> > ifconfig     iptables-save     losetup      syslogd  udevsend
> > init         isdnlog           modprobe     udev     udevstart
> > [root@q rminnich]#
> >
> >
> > and a few other bits. If you think this is a lot, you haven't been
> > watching linux lately.
> >
> > Also, the following simple thing:
> > [root@q rminnich]# cat /xentest/bin/runme
> > #!/bin/sh -x
> > mount -t tmpfs none /tmp
> > mount -t tmpfs none /var
> > mkdir -p /var/run/xenstored
> > mkdir -p /var/log/xen
> > mkdir -p /var/log/hotplug
> > mkdir -p /var/lib
> > mkdir -p /var/lib/dhcp
> > touch /var/lib/dhcp/dhcpd.leases
> > mkdir -p /var/lock/subsys
> > mkdir -p /var/run/xen-hotplug
> >
> > PATH=$PATH:/usr/lib/xen-3.0.3-1/bin
> > export PATH
> >
> > /etc/init.d/syslog start
> > /sbin/udevd&
> > modprobe loop
> > modprobe bridge
> > modprobe netloop
> > ipconfig eth0 10.0.0.1 up
> > #xend start
> > #xm create hanska &
> > PATH=$PATH:/mnt
> >
> > ah, well, we had hoped to have a readonly medium, but we have not
> > resolved the problem of a writeable root for plan 9. maybe later. What
> > would be very interesting is to not have a root at all, but just boot
> > as a terminal from somewhere, but we are not ready yet. But that is
> > the Dream.
> >
> > anyway, 20M are there, 40M need to get there, so give it a few
> > minutes. The file when done is this:
> >
> > [root@q xentest]# ls -l /tmp/xentest.tgz
> > -rw-r--r--  1 root root 62174680 Dec 20 15:48 /tmp/xentest.tgz
> > [root@q xentest]#
> >
> > testers welcome, as long as you're not too helpless when confronted
> > with Xen ... it's not ready for that yet!
> >
> > thanks
> >
> >
> > ron
>
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