[Bug 1096280] New: docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Bug ID: 1096280
           Summary: docker top stopped working, cgroup path changed
           Product: Red Hat Enterprise Linux 7
           Version: 7.1
         Component: docker
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]
        Depends On: 1088125

+++ This bug was initially created as a clone of Bug #1088125 +++

Description of problem:
The `docker top` command stopped working, the path to cgroup processes had
changed.

Version-Release number of selected component (if applicable):
docker-0.10.0-8.el7.x86_64
docker-io-0.10.0-2.fc20.x86_64

How reproducible:
always

Steps to Reproduce:
1. docker run -i fedora bash
2. docker top $NAME

Actual results:
[root@t530 ~]# docker top determined_jones 
2014/04/16 07:47:52 Error: open
/sys/fs/cgroup/devices/system.slice/docker/93dfbd4d375cf026df215d87b5d93de8b0a9bd55094e33c2ca3322cd6afb53f1/tasks:
no such file or directory

Expected results:
list of processes...

Additional info:
[root@t530 ~]# ls /sys/fs/cgroup/devices/system.slice/
cgroup.clone_children
cgroup.event_control
cgroup.procs
devices.allow
devices.deny
devices.list
docker-93dfbd4d375cf026df215d87b5d93de8b0a9bd55094e33c2ca3322cd6afb53f1.scope
notify_on_release
tasks

--- Additional comment from Lukas Doktor on 2014-05-05 03:46:55 EDT ---

The same bug is in upstream Docker version 0.10.0, build dc9c28f/0.10.0

Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1088125
[Bug 1088125] docker top stopped working, cgroup path changed

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

--- Comment #2 from Lukas Doktor  ---
The difference between Fedora and RHEL problem is, that RHEL tries to access:
docker top test_eoly 
2014/05/09 16:56:22 Error: open
/sys/fs/cgroup/devices/docker-d6dec8258b30eaecaa96f6110a427d4c3bf40fe8ec03b91ed4f277f3d835c23c.scope/tasks:
no such file or directory

And the directories are:
[root@t530 ~]# ls /sys/fs/cgroup/devices/system.slice/
cgroup.clone_children
cgroup.procs
devices.allow
devices.deny
devices.list
docker-d6dec8258b30eaecaa96f6110a427d4c3bf40fe8ec03b91ed4f277f3d835c23c.scope
notify_on_release
tasks

Note that this was executed on Fedora 20 with docker from collider, so the path
problem might be incorrect. I'll retest this directly on RHEL later.

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

--- Comment #3 from Lukas Doktor  ---
Retested on RHEL-7.0-20140507.0 with the same error:

[root@cisco-b200m1-04 ~]# docker top elegant_bohr
2014/05/09 12:09:06 Error: open
/sys/fs/cgroup/devices/docker-a1c00b36178aaa4bd35a1aa60a8707569dd65ffcc1c6168f9af084779846af9a.scope/tasks:
no such file or directory

[root@cisco-b200m1-04 ~]# ls /sys/fs/cgroup/devices/system.slice/
cgroup.clone_children  cgroup.procs   devices.deny 
docker-a1c00b36178aaa4bd35a1aa60a8707569dd65ffcc1c6168f9af084779846af9a.scope 
tasks
cgroup.event_control   devices.allow  devices.list  notify_on_release

[root@cisco-b200m1-04 ~]# ls /sys/fs/cgroup/devices
cgroup.clone_children  cgroup.event_control  cgroup.procs  cgroup.sane_behavior
 devices.allow  devices.deny  devices.list  notify_on_release  release_agent 
system.slice  tasks

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Chris Evich  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
            Version|7.1                         |7.0
           Severity|unspecified                 |high

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Daniel Walsh  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |MODIFIED
                 CC|                            |[e-mail]

--- Comment #5 from Daniel Walsh  ---
Fixed in docker-io-0.11.1-3.el7

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Lukas Doktor  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |needinfo?([e-mail])

--- Comment #6 from Lukas Doktor  ---
Hi Daniel, Chris tested it successfully on docker-0.11.1-2.el7.x86_64. I tried
docker-0.11.1-3.el7.x86_64 and today's the docker-0.11.1-5.el7.x86_64 and booth
are failing. Did the patch slipped away?

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

--- Comment #7 from Daniel Walsh  ---
According to Lokesh the patch is in there.

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Lukas Doktor  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |CLOSED
         Resolution|---                         |CURRENTRELEASE
        Last Closed|                            |2014-05-30 03:42:54

--- Comment #8 from Lukas Doktor  ---
yep, works fine with docker-0.11.1-6.el7.x86_64

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280

Lukas Doktor  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|needinfo?([e-mail])  |

[Bug 1096280] docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096280
Bug 1096280 depends on bug 1088125, which changed state.

Bug 1088125 Summary: docker top stopped working, cgroup path changed
https://bugzilla.redhat.com/show_bug.cgi?id=1088125

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |CLOSED
         Resolution|---                         |ERRATA