Date: Fri, 10 Jun 2005 11:47:54 +0200 From: Ragnar Lonn <raglon@packetfront.com> To: freebsd-net@freebsd.org Subject: IPC between vimage instances? Message-ID: <42A961CA.5030706@packetfront.com> In-Reply-To: <428DF2FF.3010408@oxygen.az> References: <200505192159.j4JLxNhb060631@atalus.net> <428DF2FF.3010408@oxygen.az>
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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). 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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