Separate test k8s

[hantaowang]

Per #319, break up the PR into small ones. This one builds onto #322 and adds the test-version flag. It also separates k8s building and cluster booting, so that you can boot a cluster without having to build k8s. The rules for how flags can be used together is defined here:

• test-version is used to determine the k8s version to test with.
• kube-version and gke-cluster-version is used to determine the cluster version to boot, depeonding on the deployment strategy.
• local-k8s-dir points to a rebuilt kubernetes directory. If this flag is set, then neither kube-version nor test-version should be because the local version is used for both cluster and tests.
• if using GKE: either set (gke-cluster-version and test-version) or (gke-cluster-version and local-k8s-dir)
• if using GCE: either set (local-k8s-dir) or (kube-version and test-version)

Do not merge until after #322 is merged. Then master will be rebased into this PR.

None

[k8s-ci-robot]

Hi @hantaowang. Thanks for your PR.

I'm waiting for a kubernetes-sigs or kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[saad-ali]

/ok-to-test

[davidz627]

/lgtm
/hold
since this depends on the commit from the other PR which has not yet merged

[hantaowang]

/hold cancel

[davidz627]

/approve
Please remove integration test binary from the commit and add to .gitignore for lgtm :)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: davidz627, hantaowang

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[hantaowang]

/pony Twilight Sparkle

[k8s-ci-robot]

@hantaowang:

In response to this:

/pony Twilight Sparkle

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[davidz627]

/lgtm