Hello all,
since yesterday I'm testing lxc-1.0.0.beta2 on a RHEL-6.5, but I
failed to get any container to start.
I've set up a RHEL-6.5 test server with the "cgconfig" service enabled
in default configuration. When I try to start a container (with root
privileges), I get:
# lxc-start -n test -d -o lxc-start.log -l DEBUG
lxc-start: command get_cgroup failed to receive response
The container did not start, and lxc-start.log has the following ERRORs:
(leading whitespace trimmed)
lxc-start 1389968577.048 ERROR lxc_cgroup - Could not set clone_children to
1 for cpuset hierarchy in parent cgroup.
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/blkio/
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/net_cls/
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/freezer/
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/devices/
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/memory/
lxc-start 1389968577.048 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/cpuacct/
lxc-start 1389968577.049 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/cpu/
lxc-start 1389968577.049 ERROR lxc_cgroup - Device or resource busy -
cgroup_rmdir: failed to delete /cgroup/cpuset/
lxc-start 1389968577.049 ERROR lxc_start - failed to create cgroups for
'test'
lxc-start 1389968577.078 ERROR lxc_start - failed to spawn 'test'
lxc-start 1389968577.079 ERROR lxc_commands - command get_cgroup failed to
receive response
The first error comes from cgroup.c:lxc_cgroup_create(). When comparing
this with cgroup.c:set_clone_children() from lxc-0.9.0 I saw that 0.9.0
ignored errors when setting clone_children, and so I patched
cgroup.c:lxc_cgroup_create() to do the same. But the container still did
not start. The errors in lxc-start.log were now:
lxc-start 1389980209.248 ERROR lxc_cgroup - No space left on device - Could
not add pid 21347 to cgroup /lxc/test: internal error
lxc-start 1389980209.270 ERROR lxc_start - failed to spawn 'test'
lxc-start 1389980209.271 ERROR lxc_commands - command get_cgroup failed to
receive response
Using strace(8), I found this:
open("/cgroup/cpuset/lxc/test/tasks", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666)
= 11
write(11, "21347", 5) = -1 ENOSPC (No space left on device)
close(11) = 0
Switching back to lxc-0.9.0, this same container starts just fine.
0.9.0 has its own set of problems when used under RHEL-6.5, but containers
do at least start - and can be shut down again. I had hoped that 1.0.0
would resolve the issues of 0.9.0... (lxc-ps and lxc-netstat don't work)
So, my first question would be: Is RHEL-6.5 (and CentOS 6.5, and others)
a "supported" platform for lxc-1.0.0?
And if so: What should I do to debug this further? Are there already
some patches I could test?
Robert
_______________________________________________
lxc-devel mailing list
lxc-devel@lists.linuxcontainers.org
http://lists.linuxcontainers.org/listinfo/lxc-devel
