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From Andrew Schwartzmeyer <and...@schwartzmeyer.com>
Subject Re: Review Request 54515: Replace `/var/run/mesos` with `os::runtime_dir()` in `Flags`.
Date Thu, 08 Dec 2016 20:14:13 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/54515/
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(Updated Dec. 8, 2016, 8:14 p.m.)


Review request for mesos and Alex Clemmer.


Changes
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Put updated description back.


Bugs: MESOS-6722
    https://issues.apache.org/jira/browse/MESOS-6722


Repository: mesos


Description (updated)
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Instead of the absolute path `/var/run/mesos`, `os::runtime_dir()` returns a
platform-specific and permissions checked path for runtime data.

This updates the `Flags::runtime_dir` to simply default to `os::runtime_dir()`
instead of having platform-specific code in the CLI, thus fully resolving
MESOS-6722. The POSIX implementation of `os::runtime_dir()` also resolves the
comparison of `user == "root"` as a permission check by correctly checking the
permissions using `os::access`.

This updates the `Flags::docker_volume_checkpoint_dir` to use
`path::join(os::var(), ...)` instead of a hardcoded `/var/run/mesos` path.


Diffs
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  src/slave/flags.cpp 74a6c9936b29d35a72d47a5b7e9939c3e49fc7b3 

Diff: https://reviews.apache.org/r/54515/diff/


Testing
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make && make check on Linux: no failures.
msbuild and attach to a master on Windows: no failures.

Checked that running agent as non-root on Linux *without* read/write permissions to `/var/run`
correctly fell back to `/tmp/mesos/runtime`.

Checked that running as `root` on Linux and `Administrator` on Windows
chose the correct default `runtime_dir` paths.


Thanks,

Andrew Schwartzmeyer


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