Re: [libvirt] PATCH: 0/7: Re-factor LXC driver

On Tue, Aug 05, 2008 at 02:17:27PM -0700, Dan Smith wrote: > DB> This is a long overdue followup to my previous set of patches to > DB> make the LXC driver use the new domain XML apis. > > Have you been able to test this with NET_NS support enabled yet? > > I am hitting the same issue I was before. On starting an LXC domain > with a network interface, the daemon finishes the action and reports > a good status to virsh. The domain fails to start, with the following > in the per-domain log file: > > DEBUG: lxc_container.c: lxcContainerStart (clone() returned, 8082) > libvir: Linux Container error : internal error read of fd 6 failed: Input/output error > DEBUG: veth.c: vethDelete (veth: veth2) > > However, now, the daemon crashes well after leaving the LXC driver's > domain startup process. From the timing, I'd guess it's in some event > (or SIGCHLD) handler, but I can't reproduce it in gdb to get more > information. That's not good. There should be no SIGCHLD's anywhere now - the container double-forks into the background. Its probably some error in the cleanup path - valgrind may help if gdb fails. > This looks to be identical in root cause to what I was seeing with the > previous set of patches, and was unable to figure out why file > descriptor 6 was getting prematurely closed. I'll get started on > debugging it again tomorrow, but it might be good if you can reproduce > it as well :) I've unfortunately still not got a kernel build with all the neccessary NET_NS bits added on.