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https://reviews.apache.org/r/68257/
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Review request for mesos, Alexander Rukletsov, Gilbert Song, Jie Yu, and Kevin
Klues.
Bugs: MESOS-9116
https://issues.apache.org/jira/browse/MESOS-9116
Repository: mesos
Description
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Previously, we were walking the process tree from the container's
`init` process to find the first process along the way whose `mnt`
namespace differs from the `init` process. We expected this algorithm
to always return the PID of the command executor's task. However, if
someone launches multiple nested containers within the process tree,
the algorithm might detect the PID of the nested container instead of
the command executor's task. The detected PID might belong to a
short-lived container, so the container's process might terminate at
the moment the containerizer launcher (aka `nanny`) process tries to
enter its `mnt` namespace. This patch fixes the detection algorithm
so that it always returns PID of the command executor's task.
Diffs
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src/slave/containerizer/mesos/utils.cpp
30e76d1d91651975033078f5450e45f5f2fd8ba0
Diff: https://reviews.apache.org/r/68257/diff/1/
Testing
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1) Internal CI with disabled
`ROOT_CGROUPS_LaunchNestedContainerSessionsInParallel` test (see previous
patch).
2) Fedora 25: `./src/mesos-tests
--gtest_filter=*AgentAPITest.LaunchNestedContainerSessionInParallel*
--gtest_break_on_failure --gtest_repeat=100 --verbose`
Thanks,
Andrei Budnik
