Re: Review Request 54212: Fixed overlay backend provisioning multi images symlink.

[Jie Yu <yu...@gmail.com>]

> On Nov. 30, 2016, 8:21 p.m., Zhitao Li wrote:
> > src/slave/containerizer/mesos/provisioner/backends/overlay.cpp, line 167
> > <https://reviews.apache.org/r/54212/diff/1/?file=1573078#file1573078line167>
> >
> >     Do we want to consider maintain a similar hierarchy as `scratch`? It seems asymmetrical if symlinks and scratch is at different file system level.
> >     
> >     Maybe we should consider make this `path::join(backendDir, "links", rootfsId)`?

Alternatively, we can put 'links' under 'scratch', thoughts?


- Jie


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On Nov. 30, 2016, 6:54 p.m., Gilbert Song wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/54212/
> -----------------------------------------------------------
> 
> (Updated Nov. 30, 2016, 6:54 p.m.)
> 
> 
> Review request for mesos, Artem Harutyunyan, Jie Yu, Qian Zhang, and Zhitao Li.
> 
> 
> Bugs: MESOS-6653
>     https://issues.apache.org/jira/browse/MESOS-6653
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Since the fix of MESOS-6000, symlinks are used in overlayfs
> backend to shorten the arguments when mounting the rootfs.
> E.g., '.../backends/overlay/links' is the symlink created
> for a provisioned image. It becomes problematic if a
> container image is specified while some image volumes are
> specified for the same container. An unique symlink is
> needed for each image to be provisioned.
> 
> 
> Diffs
> -----
> 
>   src/slave/containerizer/mesos/provisioner/backends/overlay.cpp b71a31323aef376c9a28e1d52322a1802fb212ad 
>   src/tests/containerizer/provisioner_backend_tests.cpp 727bf645dd9337a94f098ab0a816b7e0e0651083 
> 
> Diff: https://reviews.apache.org/r/54212/diff/
> 
> 
> Testing
> -------
> 
> make check
> 
> Verified that the unit test `ROOT_ImageInVolumeWithRootFilesystem` passed.
> 
> 
> Thanks,
> 
> Gilbert Song
> 
>