Gergely Fürnstáhl created IMPALA-11849:
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Summary: Improve python environment stability around impala_shell
packaging
Key: IMPALA-11849
URL: https://issues.apache.org/jira/browse/IMPALA-11849
Project: IMPALA
Issue Type: Improvement
Reporter: Gergely Fürnstáhl
How do we use python in Impala currently:
* custom built python2 for ABI compatibility reasons to use by impala_shell
* During build, we test the installability of impala_shell package by:
** Distributing by source to a tar.gz
** Creating virtualenv using the custom built impala-virtualenv using the
system interpreter (/usr/bin/python*) both for python2 and python3
*** This automatically installs pip and setuptools, by default a version it
chooses.
*** This version of impala-virtualenv only support --no-pip and
--no-setuptools, a moderner version support --setuptools <version> too, both
could be used to fix the version of the packaging environment regardless of the
interpreters version (to an extent, they need to be compatible obviously)
** Packaging it to a wheel
*** This uses an isolated build, where with modernising the packaging and
introducing pyproject.toml we could specify setuptools' version
** Install it to the virtual env
*** This uses pip, with the possibility to fallback to setuptools legacy
method.
* During impala-shell release, we probably do something similar, but need to
investigate it.
Problems:
* We use 3 different pythons during the build, system python's version could
vary depending on the OS/image.
* pip and setuptools' version is chosen by the interpreter, which makes the
build not reproducible, a new release could break the install
([IMPALA-11846|https://issues.apache.org/jira/browse/IMPALA-11846])
* custom built python2 is not getting any younger/better
Possibilities:
* Specify exact version of pip and setuptools used during build to make it
reproducible, specify setuptools version used for packaging impala_shell e.g.
by using a pyproject.toml
* Custom build python3 too, a newer version could make our tests running
faster too and drop dependency on system python.
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