Date: Mon, 26 Nov 2001 10:45:20 +0000 From: Antony T Curtis <antony@dp.abacus.co.uk> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: freebsd-stable@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: jail patch Message-ID: <3C021D40.C83C6186@dp.abacus.co.uk> References: <Pine.NEB.3.96L.1011125211141.74761G-100000@fledge.watson.org>
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Robert Watson wrote: > > On Sun, 25 Nov 2001, Gregory Neil Shapiro wrote: <snip> > In the jailng code, I allow jails to be identified using a name (other > than the hostname) when they are created, and that can later be used as a > handle for signalling. Two of the concepts that are useful in jailng are > (1) the ability to identify jails and manage them from the outside more > easily, and (2) jailinit, which permits a jail to maintain a runlevel, > meaning that you don't have to be 'in' a jail in order to start an orderly > shutdown (as you can signal jailinit), not to mention introducing the > notion of an orderly shutdown :-). <snip> I currently make use of a hacked version of init which allows me to have a whole "system" in a jail - this allows me to telnet in to a jail and do a shutdown. The only downside is that many things expect init to be pid=1 but in the jail, this isn't true - I keep the pid of the init in a temporary file (ugly hack, a better "hack" would probably involve hacking the kernel sources so that the jailed pid is "1" and that when that process dies, the whole jail gets a kill -9. -- ANTONY T CURTIS Tel: +44 (1635) 36222 Abacus Polar Holdings Ltd Fax: +44 (1635) 38670 > There is a green, multi-legged creature crawling on your shoulder. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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