Date: Wed, 30 Mar 2016 12:57:23 -0600 From: James Gritton <jamie@freebsd.org> To: freebsd-questions@freebsd.org Cc: Niklaas Baudet von Gersdorff <stdin@niklaas.eu> Subject: Re: Variables substitution in jail.conf Message-ID: <859c4fbee2fd75910dcc4b85dd2c7f8e@gritton.org> In-Reply-To: <7fbd35d23c23fb734bc10643a06f2d78@gritton.org> References: <7fbd35d23c23fb734bc10643a06f2d78@gritton.org>
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Niklaas Baudet von Gersdorff <stdin@niklaas.eu> wrote:: > James Gritton [2016-03-30 07:47 -0600] : > > Niklaas Baudet von Gersdorff <stdin@niklaas.eu> wrote: > > > > > host.hostname = "$name.box-fra-01.klaas"; > > > path = "/usr/local/jails/$name"; > > > ip4.addr = "lo1|10.15.$network.$id"; > > > ip6.addr = "vtnet0|2a00:XXX:XXXX:XXXX:X::$network:$id"; > > > mount = "/usr/local/jails/templates/base-10.2-RELEASE > > > /usr/local/jails/$name/ nullfs ro 0 0"; > > > mount += "/usr/local/jails/thinjails/$name > > > /usr/local/jails/$name/jail nullfs rw 0 0"; > > > mount.devfs; > > > > > > exec.start = "/bin/sh /etc/rc"; > > > exec.stop = "/bin/sh /etc/rc.shutdown"; > > > > > > exec.clean; > > > > > > www { > > > $id = 1; > > > $network = 1; > > > exec.poststart = "pfctl -t www -T add ${ip4.addr} {$ip6.addr}"; > > > exec.poststop = "pfctl -t www -T delete {$ip4.addr} {$ip6.addr}"; > > > } > > > The problem is pretty simple - just a case of moving some brackets. In > > the definition of exec.poststart, you did ip4.addr right - ${ip4.addr}. > > But for ip6.addr, you moved the dollar sign inside the braces - > > {$ip6.addr}. That makes it look like the braces and the ".addr" are > > just part of the string, and only $ip6 is the variable to be > > substituted. > > > > So all you need is: > > > > exec.poststart = "pfctl -t www -T add ${ip4.addr} ${ip6.addr}"; > > exec.poststop = "pfctl -t www -T delete ${ip4.addr} > > ${ip6.addr}"; > > Indeed, that was it. Thanks. Four eyes see more than two. Anyway, that > leaves > me with the problem that the variables expand to lo1|something and > vtnet0|something. I tried to set custom variables but that's not > possible, is > it? Sure, you've already got some custom variables in the jail definition, $id and $network. You can also have some on the global side. Something like: $addr4 = "10.15.$network.$id"; $addr6 = "2a00:XXX:XXXX:XXXX:X::$network:$id"; ip4.addr = "lo1|$addr4"; ip6.addr = "vnet0|$addr6"; www { $id = 1; $network = 1; exec.poststart = "pfctl -t www -T add $addr4 $addr6" exec.poststop = "pfctl -t www -T delete $addr4 $addr6" } I haven't tested that, so I'm not sure it's 100% correct, but something along those lines should work. - Jamie
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