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From Joseph Wu <>
Subject Review Request 63063: WIP: Modified Containerizer::launch interface to allow repeated launch.
Date Tue, 17 Oct 2017 01:43:51 GMT

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Review request for mesos, Gilbert Song and Jie Yu.

Bugs: MESOS-7305

Repository: mesos


There is some existing tech debt around requiring the caller of
`Containerizer::launch` to call `Containerizer::destroy` if the launch
fails (see MESOS-6214).  For nested and standalone containers, the
side effect of this results in accidentally destroying running
containers if you make the same call an even number of times.

For example, suppose the user launches a valid nested container
with an ID of 'parent.child'. If the user issues the same call to
launch 'parent.child' again, this second call will fail *and* will
also destroy the first container.

This commit prevents repeated launch calls from destroying containers
by changing the return value of `Containerizer::launch`.  There are
now four possible return values:
  * The launch succeeded.
  * The standalone/nested container already exists.
  * The given ContainerConfig is not supported.
  * The launch failed.


  src/slave/containerizer/composing.hpp 06d68eef5de7745e32f0e808f11016bcc285dd8f 
  src/slave/containerizer/composing.cpp 587f009384f0c7ef87482686578dc822d3d5b208 
  src/slave/containerizer/containerizer.hpp 449bb5d0902936faae7bf9bae9c703b219aed842 
  src/slave/containerizer/docker.hpp b602a5698cae12686f51c4b9370a06042cda6270 
  src/slave/containerizer/docker.cpp 292eecbca246edf068ec8c262aff4f3ce9cd8c67 
  src/slave/containerizer/mesos/containerizer.hpp 6d356ccf82f36df8c6f558fb0ace7d9f982a3d6b

  src/slave/containerizer/mesos/containerizer.cpp 78fdd21f8b7ede4beedff31ba2b488ffebd4ea31

  src/slave/http.cpp f2e06aff95e0628624b6ed25de222fd3f3577a0b 
  src/slave/slave.hpp aea1e948209c7c8945665915bc2f6d8eb47814ef 
  src/slave/slave.cpp 4d7dc8e9a3901b00103031e24e5d6328d0f2e2ad 
  src/tests/agent_container_api_tests.cpp PRE-CREATION 



Doesn't build yet, but I'd like to see if the interface change makes sense as it stands.


Joseph Wu

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