On Wed, Aug 06, 2008 at 10:41:42AM +0100, Daniel P. Berrange wrote:
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.
Turns out this wasn't needed. Simply commenting out use of the CLONE_NETNS flag and using a currently 2.6.26 kernel is sufficient to expose the container failing to start, and the libvirtd daemon crashing. So I'll track these down and fix it Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|