Date: Sun, 9 Jan 2011 17:20:26 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: FreeBSD virtualization mailing list <freebsd-virtualization@freebsd.org> Subject: Re: way for determine VIMAGE feature Message-ID: <20110109171351.I14966@maildrop.int.zabbadoz.net> In-Reply-To: <AANLkTimnJhTj%2BVqqz0H1FdgLuMO6cd7svq=VBsit_YcR@mail.gmail.com> References: <AANLkTi=wSg%2BjNcV0QQs1_GJ1B3bEe7McLggO1bMshvpz@mail.gmail.com> <AANLkTimnJhTj%2BVqqz0H1FdgLuMO6cd7svq=VBsit_YcR@mail.gmail.com>
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On Sun, 9 Jan 2011, Brandon Gooch wrote:
> On Sun, Jan 9, 2011 at 9:17 AM, Subbsd <subbsd@gmail.com> wrote:
>> Hi
>>
>> is there any mechanism to find out from userland is supports the
>> current kernel VIMAGE or not? something like 'sysctl
>> kern.features.vnet=1' ?
>> Thanks
>
> I've not been able to determine this either, but as it requires kernel
> re-configuration, I usually just know. In my scripts, I make sure and
> fail if the call to create a vnet jail fails:
>
> sh -c 'TEST=$(sudo jail -c vnet name=test host.hostname=test path=/) ;
> if [ $? = "1" ]; then echo "VIMAGE NOT AVAILABLE" ; exit 1 ; fi'
I would just go with jail -c vnet command=/usr/bin/true or something
along these liens for the pure test. Otherwise you might end up with
a running jail, that you may not want unless you test it with the
complete command line.
> ...or something like that.
>
> There may be a better way, or perhaps there should be.
Or there will be if there isn't yet. I remember I added a FEATURE()
macro somehere. At least my dev machine already has it...
# sysctl -a kern.features
kern.features.compat_freebsd7: 1
kern.features.compat_freebsd6: 1
kern.features.compat_freebsd5: 1
kern.features.compat_freebsd4: 1
kern.features.vimage: 1 <<<
kern.features.posix_shm: 1
kern.features.ipsec_natt: 1
kern.features.ipsec: 1
/bz
--
Bjoern A. Zeeb You have to have visions!
<ks> Going to jail sucks -- <bz> All my daemons like it!
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails.html
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