Chris Heller created MESOS-1886:
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Summary: Always `docker pull` if explicit ":latest" tag is present
Key: MESOS-1886
URL: https://issues.apache.org/jira/browse/MESOS-1886
Project: Mesos
Issue Type: Improvement
Components: containerization
Affects Versions: 0.20.1
Reporter: Chris Heller
Priority: Minor
With 0.20.1 the behavior of a docker container has changed (see MESOS-1762).
This change brings the docker behavior more in line with that of {{docker run}}.
I propose,if the image given explicitly has the ":latest" tag, this should
signify to mesos that an unconditional `docker pull` should be done on the
image... and if it should fail for any reason (i.e. the registry is
unavailable) we fall back to the current behavior.
This would break slightly with the semantics of how the docker command line
operates, but the alternative is to require explicit tags on every release --
which is a hinderance when developing a new image, or one must log in to each
node and run an explicit `docker pull`.
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