Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1318690 - Can't use shared volume mounts with docker 1.10
Summary: Can't use shared volume mounts with docker 1.10
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: docker
Version: 7.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Daniel Walsh
QA Contact: atomic-bugs@redhat.com
URL:
Whiteboard:
Depends On: 1318547
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-03-17 14:03 UTC by Daniel Walsh
Modified: 2019-03-06 02:02 UTC (History)
14 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 1318547
Environment:
Last Closed: 2016-06-23 16:18:01 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:1274 0 normal SHIPPED_LIVE docker bug fix and enhancement update 2016-06-23 20:12:28 UTC

Description Daniel Walsh 2016-03-17 14:03:22 UTC 
+++ This bug was initially created as a clone of Bug #1318547 +++

Description of problem:

The MountFlags=slave option is set in the docker systemd unit file which is causing shared mounts to not work with docker 1.10. I have not changed the docker.service unit file on my atomic host and it has that MountFlags=slave set in the unit file:

[vagrant@vanilla-f23atomic ~]$ rpm -qV docker | grep docker.service
.......T.    /usr/lib/systemd/system/docker.service
[vagrant@vanilla-f23atomic ~]$ grep Mount /usr/lib/systemd/system/docker.service
MountFlags=slave


I have been told this is not what we want: https://lists.projectatomic.io/projectatomic-archives/atomic-devel/2016-March/msg00083.html


Version-Release number of selected component (if applicable):
[vagrant@vanilla-f23atomic ~]$ rpm -q docker
docker-1.10.2-6.git0f5ac89.fc23.x86_64

How reproducible:
Always


Steps to Reproduce:
[vagrant@vanilla-f23atomic ~]$ sudo mount --make-shared /
[vagrant@vanilla-f23atomic ~]$ sudo docker run -it --privileged --rm -v /tmp/sharedfolder:/tmp/sharedfolder:shared sshfs /bin/bash  
docker: Error response from daemon: Cannot start container 7e99752dd8f2812a7d7acaa58594504be936b6f37aa77b6521a7098450343837: Path /tmp/sharedfolder is mounted on /sysroot but it is not a shared mount..

Actual results:
Can't run a docker container with :shared volume mount. See error message.

--- Additional comment from Daniel Walsh on 2016-03-17 10:02:47 EDT ---

Lokesh please remove this line from all Fedora and RHEL versions of docker-1.10.
Comment 2 Daniel Walsh 2016-06-03 13:19:01 UTC 
I believe this is fixed in docker-1.10.
Comment 4 Luwen Su 2016-06-11 17:29:58 UTC 
In docker-1.10.3-40.el7.x86_64, works well

# sudo mount --make-shared /
# sudo docker run -it --privileged --rm -v /tmp/sharedfolder:/tmp/sharedfolder:shared fedora /bin/bash  
[root@7ff4197b954f /]# exit
Comment 6 errata-xmlrpc 2016-06-23 16:18:01 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://access.redhat.com/errata/RHBA-2016:1274
Note You need to log in before you can comment on or make changes to this bug.