Another day with UML. I had to update Matt’s filesystem image from woody to sarge because I depend on a newer version of iptables and keepalived. It took me a while to establish the network from inside the uml and send and receive packets. I’ve chosen the tun/tap approach which worked quite well, once you remember to turn on ip packet forwarding, which kind of makes sense.

Updated the filesystem to sarge and hit a strange bug: getty was no longer functioning. Did an strace on getty and found a problem with an ioctl. This seems to be a specific problem with uml, because getty works fine on a plain debian sarge installation. Replaced the version with the one from woody and all was working again.