Bug #49644: vstart_runner: run_ceph_w() doesn't work with shell=True - CephFS - Ceph

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Bug #49644

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vstart_runner: run_ceph_w() doesn't work with shell=True

Added by Rishabh Dave about 3 years ago. Updated about 3 years ago.

Status:

New

Priority:

Normal

Assignee:

Rishabh Dave

Category:

Target version:

% Done:

Source:

Tags:

Backport:

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(FS):

qa-suite

Labels (FS):

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

Setting shell to True leads to a crash when tasks.mgr.test_module_selftest.TestModuleSelftest.test_selftest_cluster_log is run on "ceph API" GitHub CI job. The crash happens when self.subproc.communicate() is run in self.watcher_process.finished() (self.watcher_process is an instance of LocalRemoteProcess) in ContextManager.__exit__().

See ceph API job on this PR (https://github.com/ceph/ceph/pull/38471) to see the crash. The console output also contains extra debug messages that shows that crashed happened on call to self.proc.communicate() in LocalRemoteProcess.finished().

Ideally, the run_ceph_w() should work even when shell is set to True.

Also see this PR - https://github.com/ceph/ceph/pull/38443. Especially this discussion on it might be helpful - https://github.com/ceph/ceph/pull/38443#discussion_r537673068.

Why do we need to set shell to True?
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Currently, teuthology.orchestra.run.run() executes commands with shell set to True while vstart_runner.LocalRemoteProcess.run runs with shell@s set to @False. This inconsistency leads to incompatibility and bugs and makes code in teuthology.remote non-reusable.