[cc'd to freebsd-jail@FreeBSD.org where that thread originated]
Valeri Galtsev <galt...@kicp.uchicago.edu> wrote:
> On Wed, December 14, 2016 2:30 pm, Michael Grimm wrote:
>> #
>> # network settings to apply/destroy during start/stop of every jail
>> #
>> exec.prestart = "sleep 2";
>> exec.prestart += "/sbin/ifconfig epair${jailID} create up";
>> exec.prestart += "/sbin/ifconfig bridge0 addm
>> epair${jailID}a";
>> exec.start = "/sbin/sysctl net.inet6.ip6.dad_count=0";
>> exec.start += "/sbin/ifconfig lo0 127.0.0.1 up";
>> exec.start += "/sbin/ifconfig epair${jailID}b inet ${ip4_addr}";
>> exec.start += "/sbin/ifconfig epair${jailID}b inet6 ${ip6_addr}";
>> exec.start += "/sbin/route add default -gateway 10.1.1.254";
>> exec.start += "/sbin/route add -inet6 default -gateway
>> ${ip6prefixLOCAL}::254";
>> exec.stop = "/sbin/route del default";
>> exec.stop += "/sbin/route del -inet6 default";
>> exec.stop += "/bin/sh /etc/rc.shutdown";
>> exec.poststop = "/sbin/ifconfig epair${jailID}a destroy";
>>
>> #
>> # individual jail settings
>> #
>> dns {
>> $jailID = 1;
>> $ip4_addr = 10.1.1.1;
>> $ip4_addr_2 = 10.1.1.2;
[…]
> Michael, is it possible to have two addresses belonging to two different
> networks (through two different network interfaces)?
>
> Say, on host system:
>
> ifconfig_igb0="inet 172.20.9.22 ...
> ifconfig_igb1="inet 10.1.1.17 ...
>
>
> and in some jail
>
> $ip4_addr = 172.20.9.22;
> $ip4_addr_2 = 10.1.1.17;
>
> - will that work? This is what didn't work for me in the past when
> configured jails old style in /etc/rc.conf
I can't answer that because I have never tried it before.
Those exec.<foo> will give you a very fine-grained control over which commands
are run at the host environment (exec.prestart, exec.poststop, exec.poststart)
or within the jail's environment (exec.start, exec.stop, exec.prestop) in which
order. Have a look at jail(8) for details (and presumably more exec.<variants>).
Therefore I am quite confident that whatever could be done with jails might be
"coded" into jail.conf.
Regards,
Michael
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