Jason Lai created MESOS-8257:
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Summary: Unified Containerizer "leaks" a target container mount
path to the host FS when the target resolves to an absolute path
Key: MESOS-8257
URL: https://issues.apache.org/jira/browse/MESOS-8257
Project: Mesos
Issue Type: Bug
Components: containerization
Reporter: Jason Lai
Assignee: Jason Lai
If a target path under the root FS provisioned from an image resolves to an
absolute path, it will not appear in the container root FS after
{{pivot_root(2)}} is called.
A typical example is that when the target path is under {{/var/run}} (e.g.
{{/var/run/some-dir}}), which is usually a symlink to an absolute path of
{{/run}} in Debian images, the target path will get resolved as and created at
{{/run/some-dir}} in the host root FS, after the container root FS gets
provisioned. The target path will get unmounted after {{pivot_root(2)}} as it
is part of the old root (host FS).
A workaround is to use {{/run}} instead of {{/var/run}}, but absolute symlinks
need to be resolved within the scope of the container root FS path.
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