Ragnar Lonn wrote:
Hello,
I've been using vimage on FreeBSD 4.11 along with Netgraph to setup a
system
that simulates many physical client machines for the purpose of
testing broadband
Internet access hardware. I have hundreds of vimages, each with its
own ngeth0
network interface connected via Netgraph to a real physical interface.
It is working
very well indeed but now I'm trying to setup logging from the various
vimage
instances and have run into problems. Each vimage runs applications that
I want to log the output from in an orderly manner. I'd like to use
syslog but as
it turns out, the processes inside a vimage cannot communicate with
the syslogd
in the "default" vimage. I tried logging to the Unix domain socket
/var/run/log but
that didn't work from within a vimage (other than "default" of course).
did you ask syslog to open sockets in all the chroots?
I assume yes.. I hadn't realised that the vimage code separates
unix domain sockets etc. but I guess that makes sense.
As you mention, the usual answer is to get the syslog on each system to
forward everything to one logging system.
you could add a second interface to each vimage just for logging to
keep it separate from the testing..
What ways are there to do IPC between applications in different vimages?
I know I can connect them using Netgraph and virtual network
interfaces but
setting up more network interfaces means a lot of housekeeping as
those interfaces
can't be removed when I remove vimages from the system. I dont want to
send
actual traffic out onto the network either, as that might interfere
with the test
traffic to/from the machine.
Any ideas?
Regards,
/Ragnar
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