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Bug 1317991 - cgroups: cgroups.proc no such file or directory error during docker build
Summary: cgroups: cgroups.proc no such file or directory error during docker build
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: docker
Version: 7.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Mrunal Patel
QA Contact: atomic-bugs@redhat.com
Yoana Ruseva
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-03-15 17:21 UTC by Lokesh Mandvekar
Modified: 2019-03-06 01:52 UTC (History)
17 users (show)

Fixed In Version: docker-1.9.1-22.el7
Doc Type: Bug Fix
Doc Text:
Clone Of: 1317059
Environment:
Last Closed: 2016-03-31 23:24:10 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:0536 0 normal SHIPPED_LIVE docker bug fix and enhancement update 2016-04-01 03:19:56 UTC

Description Lokesh Mandvekar 2016-03-15 17:21:32 UTC 
+++ This bug was initially created as a clone of Bug #1317059 +++

Description of problem:

Errors such as
System error: open /sys/fs/cgroup/devices/system.slice/docker-fc2e8c0bfdef0d585ed13e784ccc1024ec33f4f01e3c4c992ea15b38abca58b7.scope/cgroup.procs: no such file or directory

are seen during origin tests.
For more info see https://github.com/openshift/origin/issues/7927

Version-Release number of selected component (if applicable):
docker 1.9.1

How reproducible:
Seen during jenkins tests



Actual results:
docker build failure

Expected results:
docker build shouldn't fail with this cgroups error


Additional info:
This seems like a probable race of some kind with systemd cgroups support.

The code that is failing does the following:
1. Creates a systemd transient unit for e.g. /system.slice/docker-fc2e8c0bfdef0d585ed13e784ccc1024ec33f4f01e3c4c992ea15b38abca58b7.scope
2. Join the device cgroup manually by creating the device directory
at sys/fs/cgroup/devices/system.slice/docker-fc2e8c0bfdef0d585ed13e784ccc1024ec33f4f01e3c4c992ea15b38abca58b7.scope
3. Write the pid of the container process to 
/sys/fs/cgroup/devices/system.slice/docker-fc2e8c0bfdef0d585ed13e784ccc1024ec33f4f01e3c4c992ea15b38abca58b7.scope/cgroup.procs (creating the file as well)

--- Additional comment from Clayton Coleman on 2016-03-15 09:25:10 CDT ---

This blocks the OpenShift 3.2 release, given that it results in failures in roughly 1% of container launches on Docker 1.9 on RHEL.

--- Additional comment from Mrunal Patel on 2016-03-15 12:17:34 CDT ---

https://github.com/projectatomic/docker/pull/76 is a potential fix that we need a rpm for.
Comment 3 Luwen Su 2016-03-20 13:35:33 UTC 
Works fine with 
# mkdir mkdir container-test.scope
# pwd
/sys/fs/cgroup/systemd/system.slice/container-test.scope

root      2490  0.2  0.2 245988 16404 pts/0    Sl+  21:33   0:00 docker run -it rhel7 /bin/bash

#echo 2490 > cgroup.proc
In docker-1.9.1-23.el7.x86_64, move to verified
Comment 5 errata-xmlrpc 2016-03-31 23:24:10 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0536.html
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