[WIP] gcb: Add hack to rewrite version markers

[justaugustus]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Reported in kubernetes/kubernetes#95536 / https://kubernetes.slack.com/archives/C2C40FMNF/p1602638351297900, our stable version markers are currently pointing to v1.20 pre-release versions, instead of v1.19.2.

This is an emergency script (with many of the values hardcoded) to overwrite the production version markers.

Which issue(s) this PR fixes:

Special notes for your reviewer:

This is the hastily-written bash version of one of the potential "emergency commands" I was referencing in #1494.
I can take a crack at converting this to go when I have some time.

Does this PR introduce a user-facing change?

gcb: Add hack to rewrite version markers

[k8s-ci-robot]

@justaugustus: Adding label: do-not-merge/blocked-paths because PR changes a protected file.

Reasons for blocking this PR:

[Changes to certain release tools can affect our ability to test, build, and release Kubernetes. This PR must be explicitly approved by SIG Release repo admins.]

• gcb/fix/cloudbuild.yaml

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justaugustus

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [justaugustus]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[justaugustus]

GCB command invocation:

$ time gcloud builds submit --no-source --project=kubernetes-release-test --config=gcb/fix/cloudbuild.yaml --substitutions=_TOOL_ORG=justaugustus,_TOOL_REPO=release,_TOOL_BRANCH=fix-marker
Created [https://cloudbuild.googleapis.com/v1/projects/kubernetes-release-test/builds/a1bac1b8-91a1-41ce-85d7-b46ee79f56c6].
Logs are available at [https://console.cloud.google.com/cloud-build/builds/a1bac1b8-91a1-41ce-85d7-b46ee79f56c6?project=648026197307].

Fix run is here: https://console.cloud.google.com/cloud-build/builds/a1bac1b8-91a1-41ce-85d7-b46ee79f56c6?project=kubernetes-release-test

Log snips from GCB run (for those that don't have access):

Writing v1.19.2 to fix_version.txt...
Updating stable to v1.19.2...
Copying file://fix_version.txt [Content-Type=text/plain]...
/ [0 files][    0.0 B/    8.0 B]                                                
Operation completed over 1 objects/8.0 B.                                        
Updating stable-1 to v1.19.2...
Copying file://fix_version.txt [Content-Type=text/plain]...
/ [0 files][    0.0 B/    8.0 B]                                                
Operation completed over 1 objects/8.0 B.                                        
Removing stable-1.20 marker...
Removing gs://kubernetes-release/release/stable-1.20.txt...
/ [1 objects]                                                                   
Operation completed over 1 objects.                                              

Local check of version markers:

$ for marker in stable stable-1 stable-1.20; do gsutil cat "gs://kubernetes-release/release/$marker.txt"; done
v1.19.2
v1.19.2
CommandException: No URLs matched: gs://kubernetes-release/release/stable-1.20.txt

[justaugustus]

@kubernetes/release-engineering -- Does anyone want to take this and convert it into a krel fix marker command?
ref: #1494

[hasheddan]

@justaugustus I can take that :)

[justaugustus]

Thanks Dan!

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle stale

[justaugustus]

Closing as this was just for an emergency fix.
Dan to pick up in #1494.

/close

[k8s-ci-robot]

@justaugustus: Closed this PR.

In response to this:

Closing as this was just for an emergency fix.
Dan to pick up in #1494.

/close

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.