Am 31.03.2014 20:10, schrieb Dwight Engen: > On Sat, 29 Mar 2014 23:39:33 +0100 > Florian Klink <flo...@flokli.de> wrote: > >> Hi, >> >> when running multiple lxc actions in row using the command line >> tools, I sometimes observe the following state: >> >> >> - lxc-monitord is not running anymore >> - /run/lxc/var/lib/lxc/monitor-fifo still exists, but is "refusing >> connection" >> >> In the logs, I then see the following: >> >> >> lxc-start 1395671045.703 ERROR lxc_monitor - connect : backing off >> 10 lxc-start 1395671045.713 ERROR lxc_monitor - connect : backing >> off 50 lxc-start 1395671045.763 ERROR lxc_monitor - connect : >> backing off 100 lxc-start 1395671045.864 ERROR lxc_monitor - >> connect : Connection refused >> >> >> ... and the command fails. > > The only time I've seen this happen is if lxc-monitord is hard killed > so it doesn't have a chance to clean up and remove the socket.
Here, it's happening quite frequently. However, the script never kills lxc-monitord on its own, it just tries to detect and fix this state by removing the socket file... > >> >> A possible workaround would be checking for non-running lxc-monitord >> process but existing monitor-fifo file then removing the fifo if it >> exists before running the next lxc command, but thats ugly ;-) > > Is there a good non-racy way to do this? I guess monitord could write > its pid in $LXCPATH and we could kill(pid, 0) it. > >> Is this behaviour known? Is there some missing "cleanup code" in >> lxc(_monitord) or why is it failing like this? > > Currently it catches SIGILL, SIGSEGV, SIGBUS, and SIGTERM and cleans > up. Other than hard kill I'm not sure what else might cause it to exit > without cleaning up. I shutdown containers with `lxc-stop -n container-name` (lxc.stopsignal=30 (SIGPWR)), however this signal should never go to lxc_monitord, right? > >> Florian >> >> _______________________________________________ >> lxc-users mailing list >> lxc-users@lists.linuxcontainers.org >> http://lists.linuxcontainers.org/listinfo/lxc-users > _______________________________________________ lxc-users mailing list lxc-users@lists.linuxcontainers.org http://lists.linuxcontainers.org/listinfo/lxc-users
