Hello.
> >
> > here is an example setup how to accomplish your 'funny'
> > routing scenario ... enjoy!
> >
I'm on the right track, finally.
> >
> > Tested as two QEMU instances connected via a simple
> > bridging setup on the real machine ...
> >
Referring to your example, traffic between 2 vservers on Host 1
is now routed through Host 2.
While turning some knobs ;-) I could single out a few problems.
(1)
I had been trying to figure out what was the purpose of the
"ip route del ..." invocation in "Host 1 Magic", and arrived
to the conclusion that it shouldn't be there at all!
Indeed, here, these commands (or some side-effect of it?) removes
my "eth0.2" and "eth0.3" interfaces, which has the unfortunate
consequence that "ip route add default via ..." results in a
"Network Unreachable" error.
> >
> > Host 1 Magic:
> > =============
> >
> > /* default gw for Guest 1 */
> > ip rule add from 172.16.0.1 table 16
> > ip route add default via 172.16.0.2 table 16
> > ip route del 172.16.0.0/16
^^^^^^^^^^^^^^^^^^^^^^^^^^
I removed that one.
> >
> > /* default gw for Guest 2 */
> > ip rule add from 172.17.0.1 table 17
> > ip route add default via 172.17.0.2 table 17
> > ip route del 172.17.0.0/16
^^^^^^^^^^^^^^^^^^^^^^^^^^
And that one.
Can you confirm that it should be so?
The rest is perfect :-) [But see (2).]
(2)
I wanted to modify it to have something more flexible but all my attempts
resulted in errors. For instance, I tried to replace the "default" argument
by a specific network/host address, but always got an "Invalid argument" from
RTNETLINK.
The purpose is now to have traffic from Host 1 to vservers routed through the
usual "direct" (lo) route. So the question is: Is it possible to limit the
effect of the "indirect" route to selected networks?
(3)
I couldn't make your example work while following your advice about suppressing
/etc/vservers/*/interfaces/dev and
/etc/vservers/*/interfaces/0/prefix
and adding
/etc/vservers/*/interfaces/0/nodev
Attempts to do so resulted in no interface being visible within the guest, and
no connectivity.
With the usual setup (with the "interfaces/dev" file being present), it works
as expected but then there is always that
ERROR: trying to add VLAN #3 to IF -:eth0:- error: Invalid argument
at vserver startup.
Thanks for your patience and best regards,
Gilles
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