Till Toenshoff created MESOS-7405:
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Summary: Allow isolators to render mapped sandbox specific
environment variables.
Key: MESOS-7405
URL: https://issues.apache.org/jira/browse/MESOS-7405
Project: Mesos
Issue Type: Bug
Components: agent, containerization, isolation
Reporter: Till Toenshoff
Within the mesos-containerizer, isolators are responsible for preparing the
containerized context for an executor by implementing
[{{prepare}}|https://github.com/apache/mesos/blob/253c89483cb6e31225a1f55449ff88c676030eec/include/mesos/slave/isolator.hpp#L68-L70].
Part of such preparation may e.g. be sandbox mutations within the root
filesystem as well as rendering environment variables returned via the
optionally returned
[{{ContainerLaunchInfo}}|https://github.com/apache/mesos/blob/253c89483cb6e31225a1f55449ff88c676030eec/include/mesos/slave/containerizer.proto#L164].
IIUC currently it seems to not be possible to have an isolator setup
environment variables pointing to mapped locations within the sandbox path as
that path gets determined after all isolators did their preparation.
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