pysendfile library is unmaintained

[Takashi Kajinami]

The pysendfile library[1] was added as an optimal dependency for zero-copy image upload[2] but the library got no release for 10 years.

We should consider replacing it by os.sendfile or removing the feature instead of using the unmaintained library.

[1] https://pypi.org/project/pysendfile/
[2] https://review.opendev.org/c/openstack/glance/+/3863

[Takashi Kajinami (kajinamit)]

It turned out sendfile support was effectively removed by https://review.opendev.org/c/openstack/glance/+/12619 ... Then we can just remove the feature instead of restoring it.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/glance/+/916422
Committed: https://opendev.org/openstack/glance/commit/205ca3336a7646ad3fbf92d8cf2509116a10bfcf
Submitter: "Zuul (22348)"
Branch: master

commit 205ca3336a7646ad3fbf92d8cf2509116a10bfcf
Author: Takashi Kajinami <email address hidden>
Date: Fri Apr 19 21:26:24 2024 +0900

    Remove sendfile support

    pysendfile[1] was added as an optional dependency but the library
    hasn't been maintained and has got no release since 2014.

    What is worse, the sendfile implementation is not actually working
    since The SendFileIterator class was removed[2]. (Follow-up[3] removed
    the remaining reference to the class). The broken implementation has
    not been detected because the client is not currently used to upload
    contents.

    Remove the incomplete implementation to get rid of the dependency on
    the unmaintained library.

    [1] https://pypi.org/project/pysendfile/
    [2] 76c3620c7effb15be577450c276db1e394c2de3e
    [3] 0c151d7d7ea00627fad182898958db55b1fef3fd

    Closes-Bug: #2062573
    Change-Id: Ia4784f59d16660e8d40c0e409f092ac4e46870b4

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 29.0.0.0b1 development milestone.