lxc slow start & unexpectedly disconnected from boot status daemon

[Andy Igoshin]

lxc starts very slowly. 'error: unexpectedly disconnected from boot status daemon' is printed. after load it works as expected.

container was created via lxc-create.

hardware: HP DL380G6

----------------------------------------------------------------------------
root@relay1:~# lxc-start --name=sbc
error: unexpectedly disconnected from boot status daemon

Ubuntu 11.10 sbc /dev/console

sbc login: root
Password:
Last login: Sat Feb 4 18:40:33 UTC 2012 on console
Welcome to Ubuntu 11.10 (GNU/Linux 3.0.0-15-server x86_64)

 * Documentation: https://help.ubuntu.com/11.10/serverguide/C
root@sbc:~#

----------------------------------------------------------------------------
root@relay1:~# lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

root@relay1:~# apt-cache policy lxc
lxc:
  Installed: 0.7.5-0ubuntu8.3
  Candidate: 0.7.5-0ubuntu8.3
  Version table:
 *** 0.7.5-0ubuntu8.3 0
        500 http://ru.archive.ubuntu.com/ubuntu/ oneiric-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.7.5-0ubuntu8 0
        500 http://ru.archive.ubuntu.com/ubuntu/ oneiric/universe amd64 Packages

----------------------------------------------------------------------------
15:52:22.339392 read(11, "error: unexpectedly disconnected"..., 1024) = 58
15:52:22.339562 write(13, "error: unexpectedly disconnected"..., 58error: unexpectedly disconnected from boot status daemon) = 58
15:52:22.339644 epoll_wait(15, {{EPOLLIN, {u32=24231760, u64=24231760}}}, 10, 4294967295) = 1
15:54:22.366554 ioctl(17, FIONREAD, [32]) = 0

15:52:22.339644 - 15:54:22.366554

full strace attached.

[Serge Hallyn (serge-hallyn)]

Thanks for taking the time to submit this bug.

You say the containers start slowly, but the strace shows it took about 2 seconds. Can you tell us how long it actually takes?

I suspect (because I don't see it) that it is fixed as a part of the upstart related fixes in precise.

[Andy Igoshin (andy-igoshin)]

15:52:22.339392 read(11, "error: unexpectedly disconnected"..., 1024) = 58
15:52:22.339562 write(13, "error: unexpectedly disconnected"..., 58error: unexpectedly disconnected from boot status daemon) = 58
15:52:22.339644 epoll_wait(15, {{EPOLLIN, {u32=24231760, u64=24231760}}}, 10, 4294967295) = 1
^^^^

here after disconnect message it takes 2 minutes to continue loading container quickly.

15:54:22.366554 ioctl(17, FIONREAD, [32]) = 0
^^^^

[Serge Hallyn (serge-hallyn)]

Thanks.

I can't reproduce this on an oneiric vm.

In the description you said

    "container was created via lxc-create."

What was the exact command you used? What are the contents of the lxc.conf you used?

[Serge Hallyn (serge-hallyn)]

As discussed in bug 930285 comment 9, in oneiric you must provide a configuration file at lxc-create. The comment explains the delay. I'll mark this bug invalid, but bug 930285 very much remains valid and worrying.

Thanks for your reports!

[Andy Igoshin (andy-igoshin)]

yes you are right. delay was due to dhcp request.

i saw incorrect path in the log :

Feb 11 06:36:44 localhost dhclient: can't create /var/lib/dhcp3/dhclient.eth0.leases: No such file or directory

real path is /var/lib/dhcp