[Bug 1216153] New: Docker daemon runs in shared mount namespace
https://bugzilla.redhat.com/show_bug.cgi?id=1216153
Bug ID: 1216153
Summary: Docker daemon runs in shared mount namespace
Product: Fedora EPEL
Version: el6
Component: docker-io
Assignee: ichavero(a)redhat.com
Reporter: michaeljameswells+redhatbugzilla(a)gmail.com
QA Contact: extras-qa(a)fedoraproject.org
CC: adimania(a)gmail.com, admiller(a)redhat.com,
golang(a)lists.fedoraproject.org, hushan.jia(a)gmail.com,
ichavero(a)redhat.com, jchaloup(a)redhat.com,
jperrin(a)centos.org, lsm5(a)redhat.com,
mattdm(a)redhat.com, mgoldman(a)redhat.com,
miminar(a)redhat.com, s(a)shk.io, thrcka(a)redhat.com,
vbatts(a)redhat.com
Description of problem:
The docker daemon is run in a shared mount namespace, causing problems when
restarting the docker service. This prevents starting up containers where
mounts remain in place.
Version-Release number of selected component (if applicable):
1.5.0-1.el6
How reproducible:
Always
Steps to Reproduce:
1. docker run -d --name test centos sleep infinity
2. service docker restart
3. docker start test
Actual results:
Error response from daemon: Cannot start container test: Error getting
container 0412d5cce356ff269bd85b2096eb8bc0b2cc58a67096c6c6587a85f7e82f0b77 from
driver devicemapper: Error mounting
'/dev/mapper/docker-253:0-2097716-0412d5cce356ff269bd85b2096eb8bc0b2cc58a67096c6c6587a85f7e82f0b77'
on
'/var/lib/docker/devicemapper/mnt/0412d5cce356ff269bd85b2096eb8bc0b2cc58a67096c6c6587a85f7e82f0b77':
device or resource busy
FATA[0000] Error: failed to start one or more containers
Expected results:
Container to start.
Additional info:
A merged pull request containing updated sysvinit script is found here:
https://github.com/docker/docker/pull/10225
It was merged prior to the 1.5.0 release and involves running "unshare -m" when
starting the docker daemon to place it into its own mount namespace.
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