Bug 1373610

Summary: docker :Z volume mounts fail on non-selinux filesystems
Product: [Fedora] Fedora Reporter: Dusty Mabe <dustymabe>
Component: dockerAssignee: Daniel Walsh <dwalsh>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 24CC: adimania, admiller, amurdaca, dwalsh, ichavero, jcajka, jchaloup, lsm5, marianne, miminar, nalin, riek, vbatts
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Last Closed: 2016-09-14 14:27:26 UTC Type: Bug
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Description Dusty Mabe 2016-09-06 17:38:06 UTC 
Description of problem:

When attempting to volume mount a directory on a filesystem that doesn't support selinux (i.e. fuse filesystems like sshfs) the docker daemon will error. One could argue that this is desired behavior but to work around it for every project that uses ":Z" a user would either have to remove ":Z" or move the files to a filesystem that does support selinux, which is not a good user experience. According to dwalsh the "ENOSUP should be handled, either ignored or perhaps logged."


Version-Release number of selected component (if applicable):
docker-1.10.3-26.git1ecb834.fc24.x86_64


How reproducible:
Always

Steps to Reproduce:
$ docker run -it --rm -v /proc/:/tmp/proc:Z centos:7 bash
docker: Error response from daemon: operation not supported.
Comment 1 Daniel Walsh 2016-09-14 14:27:08 UTC 
I think we should leave this as an error.  For now, unless it becomes more of a problem.
Comment 2 Daniel Walsh 2016-09-14 14:45:01 UTC 
Opened a pull request to better document the error.
https://github.com/opencontainers/runc/pull/1046