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From: Herbert Poetzl (herbert_at_13thfloor.at)
Date: Sat 06 Aug 2005 - 10:01:31 BST


On Sat, Aug 06, 2005 at 03:27:42AM +0200, Andreas John wrote:
> Hello!
>
> >/dev/initctl is a pipe created by init, so if you
> >start an actual init inside your guest, it will create
> >that pipe, then listen to it and once the reboot (or
> >shutdown) calls through the pipe, issue the reboot to
> >the kernel ...
> >
> >which kind of setup you use is your choice ...
>
> Hmmm .... so how do I supress VServers "fakeinit" and start a "real" one?

you change the init style from 'sysv' to 'plain' or
'minit' depending on your init ... see the Flower Page
for details ...

> The one that is running does not create the pipe:

it does, but that one is on the host, and you do not
want to send reboot requests there, I guess ...

> foo:/# ps faxu
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
> root 15173 7.0 0.5 4872 1636 pts/0 S 03:13 0:00
> /bin/bash -login
> root 15187 0.0 0.2 4612 872 pts/0 R+ 03:13 0:00 \_ ps faxu
> root 1 0.0 0.1 1588 516 ? S Aug05 0:01 init [2]
> [...]
>
> foo:/# reboot
> shutdown: /dev/initctl: No such file or directory
> init: /dev/initctl: No such file or directory

your 'reboot' is the same binary as your 'init' and
depending on the options and pid, it acts as init,
does a reboot (-f option) or just tries to contact
the process with pid=1 to do that on behlaf ...

> It's not really that important, but staying als close to a real server
> as possible in the default setup would be a good choice.

depends on the purpose, if you do not like the ovehead
introduced by a running init (inside the guest) you
are better off by not running it (i.e. using sysv init)

HTH,
Herbert

> n8,
> Andreas
>
>
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