This should avoid spamming build-log.txt with messages like:

    perl: warning: Setting locale failed.
    perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LANG = "en_US.UTF-8"
        are supported and installed on your system.
    perl: warning: Falling back to the standard locale ("C").

OSX has shasum but not sha1sum, which is part of GNU coreutils.

Automatic merge from submit-queue

Merge but disable unsafe conversions

This restores all the code but turns off the boolean that allows unsafe. Allows further iteration.

This is a simpler version of the revert that preserves the other improvements to the code.

@wojtek-t

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Make get-kube.sh smarter when choosing if it should download

The #19404 fix for #15197 doesn't work very well when this script is used in CI

Since our kubernetes release tarballs are always named `kubernetes.tar.gz`, checking timestamps alone won't guarantee we do the right thing. If we're trying to extract a different release than the version currently downloaded, both `curl` and `wget` will just use the preexisting version.

My change makes the caching a bit more explicit; we look inside the kubernetes tarball for the `version` file and compare that to the release requested.

I've also added some code to automatically delete the preexisting `kubernetes/` directory so that we don't get into a weird state with multiple versions extracted into the same root.

This is a lot of shell, and I've tested the various branches manually, but we definitely need a better way to automate testing this (or simplify/remove some of the functionality).

cc @fejta @spxtr @nagarjung @roberthbailey

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Reduce lock contention in watchCache

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Beef up the CONTRIBUTING doc

Add links to CNCF CLA, as well as links to file an issue and to the help-wanted
list.

@kubernetes/contributor-experience

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Add multiple PV/PVC pair handling to persistent volume e2e test

Adds the framework for creating, validating, and deleting groups of PVs and PVCs.

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Build: Use checksum to rsync results

If dependencies are touched, the Makefile will detect that tools like
deepcopy-gen need to be rebuilt.  It will rebuild them, but if Go decides the
dependencies are not ACTUALLY updated (maybe it was a test file - known
limitation of the current Makefile), it does not touch the resulting binary.
The Makefile touches the result explicitly to mark that the dep change has
been handled.  But rsync blows away that change with the older file, and
helpfully preserves the timestamp.  This repeats on every build.

Now rsync ignores it if the checksum is the same.  Result = faster build.

@wojtek-t @gmarek

bazel: fix build after #34892

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Fix drain test flake

Fixes #35371

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vSphere cloud provider: re-use session for vCenter logins

This change allows for the re-use of a vCenter client session.  Addresses #34491

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Node status updater should SetNodeStatusUpdateNeeded if it fails to

update status

When volume controller tries to update the node status, if it fails to
update the nodes status, it should call SetNodeStatusUpdateNeeded so
that the volume list could be updated next time.

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Fix too small network for kubemark

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Reduce amount of not-helping logs in apiserver

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Generalize Pod creation across e2e and integration tests

Depends on previous PRs

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Speed up some networking tests in large clusters

Since we are getting towards testing larger and larger clusters (hopefully 5000-node ones soon-ish), I'm trying to limit the amount of super long tests to minimum.

This should significantly reduce amount of time used by those from test/e2e/networking.go.

@gmarek

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Add vSphere Volume Examples

This PR adds vSphere Volume Examples

This reverts commit feb56cc4.

This reverts commit 50bcdb96.

Revert "remove versioned LabelSelector definitions"

This reverts commit 1ace8fa9.

If dependencies are touched, the Makefile will detect that tools like
deepcopy-gen need to be rebuilt.  It will rebuild them, but Go decides the
dependencies are not actually updated (maybe it was a test file - known
limitation of the current Makefile) and does not touch the resulting binary.
Then the Makefile touches the result explicitly to mark thatthe dep change has
been handled.  Then rsync blows away that change with the older file, and
helpfully preserves the timestamp.

Now rsync ignores it if the checksum is the same.  Result = faster build.

Revert "increment kube-addon-manager version number"

This reverts commit 1f599af7.

Revert unsafe conversion

This reverts commit 5b18b4e5.

This reverts commit 2b1790cc.

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Log failed containers after summary e2e test

To help debug https://github.com/kubernetes/kubernetes/issues/34990

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Remove versioned LabelSelectors

We have LabelSelectors defined in `unversioned`, `batch/v1`, `batch/v2alpha1`, and `extensions/v1beta1`.  Their definitions are all the same. I kept the definition in `unversioned` and removed the others. It only makes sense to define a versioned LabelSelectors if the definition is different.

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Marked NodeOutOfDisk test with feature label

Marked NodeOutOfDisk test with feature label to temporarily remove it from flaky suite.

@madhusudancs @piosz

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build-tools/README word error

build-tools/README line 42
move data in and and of the container => move data in and out of the container