Comment 1 for bug 1988349

Reviewed: https://review.opendev.org/c/starlingx/root/+/855390
Committed: https://opendev.org/starlingx/root/commit/3ad5c3096a1f121c098ced0a581c8d7915ac9b0d
Submitter: "Zuul (22348)"
Branch: master

commit 3ad5c3096a1f121c098ced0a581c8d7915ac9b0d
Author: M. Vefa Bicakci <email address hidden>
Date: Mon Aug 29 21:47:51 2022 +0000

    stx: Fix-up for Kubernetes tarball download hang

    Certain corporate firewalls inspect Kubernetes source tar archive
    downloads when downloading from mirror.starlingx.cengn.ca with plain
    HTTP, which appears to cause wget to encounter its default 15-minute
    read time-out due to a stalled download. While the version of wget in
    the Debian-based build container does recover successfully from the
    time-out, the 15-minute-long time-out is still undesirable.

    This commit resolves the same issue resolved by commit ac49ff342c71
    ("use curl + avoid partial downloads") in the StarlingX tools
    repository, the code review for which is at:
      https://review.opendev.org/c/starlingx/tools/+/817049

    The change identifier for that commit is:
      Iaa89009ce23efe5b73ecb8163556ce6db932028b

    The aforementioned commit was CentOS-based StarlingX, whereas this
    commit is for Debian-based StarlingX.

    Here are the logs (with additional line-breaks) from build-pkgs'
    debrepack module depicting this issue. Note the 15 minute jump from
    19:27:21 to 19:42:29, indicating that wget encounters a read time-out.

    2022-08-29 19:27:21,361 - debrepack - INFO: \
      === Debian Package Name: kubernetes-1.21.8
    2022-08-29 19:27:21,362 - debrepack - INFO: \
      === Package Version: 1.21.8
    2022-08-29 19:27:21,397 - debrepack - INFO: \
      Download http://mirror.starlingx.cengn.ca:80/\
        mirror/debian/github.com/kubernetes/kubernetes/\
        archive/refs/tags/v1.21.8.tar.gz to kubernetes-1.21.8.tar.gz
    2022-08-29 19:27:21,398 - debrepack - INFO: \
      [ Run - "wget -t 5 --wait=15 \
        http://mirror.starlingx.cengn.ca:80/\
        mirror/debian/github.com/kubernetes/\
        kubernetes/archive/refs/tags/v1.21.8.tar.gz \
        -O kubernetes-1.21.8.tar.gz" ]
    2022-08-29 19:42:29,449 - debrepack - INFO: \
      [ Run - "sha256sum kubernetes-1.21.8.tar.gz |cut -d" " -f1" ]
    2022-08-29 19:42:29,732 - debrepack - DEBUG: \
      b585d37fb145de9b91cc934669e64ffd0743f40298a2de970509ac182c70a67a

    One option to resolve this issue would be to use wget's --read-timeout
    option and set the 15-minute time-out to a smaller value such as 5
    seconds. This commit opts to use curl instead to avoid the time-out
    altogether; curl does not appear to exhibit the same issue. This is
    also the approach taken by the aforementioned commit in the StarlingX
    tools repository.

    Verification

    - The following command line:

        stx shell -c "downloader -c -b -s && build-pkgs -c -a"

      (which forces a fresh download of all source and binary archives) does
      not exhibit any issues, including the Kubernetes tar archive download
      time-out, and the following build-pkgs command to build all packages
      from scratch completes successfully as well.

    Closes-Bug: 1988349
    Change-Id: I864877af24a38851ac8972386a03c4a692e3b6a4
    Signed-off-by: M. Vefa Bicakci <email address hidden>