Add Kubernetes Version Check to Installation Script

[prajjwalyd]

Fixes #7813

Proposed Changes

Please categorize your changes:

• 🎁 Added a minimum Kubernetes version check in install.sh.

• check_k8s_version.go connects to a Kubernetes cluster using the kubeconfig file, then checks if the cluster's version is compatible with the minimum required version specified by Knative. If the version is compatible, it prints a success message; otherwise, it logs an error and exits.

• When using k8s v1.27.0:
  

• When using k8s v1.28.0: (minimum specified version)
  

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Docs

[knative-prow]

Hi @prajjwalyd. Thanks for your PR.

I'm waiting for a knative 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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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-sigs/prow repository.

[prajjwalyd]

/cc @Cali0707 @Leo6Leo

[Leo6Leo]

Thanks for the PR! @prajjwalyd ! I tested the script, and it works perfectly on my end.

The only thing that I am not sure is where to put the check_k8s_version.go file, as currently under the /hack folder, there are already many files.

[prajjwalyd]

Thank you for reviewing it, @Leo6Leo!
I'm also unsure about where check_k8s_version should be placed...
maybe creating a subdirectory (/hack/version_check) or something like that?

[Cali0707]

Nice start @prajjwalyd !

[Cali0707]

I'm also unsure about where check_k8s_version should be placed...
maybe creating a subdirectory (/hack/version_check) or something like that?

My vote would be to put it in a subdirectory of test instead of hack, otherwise I like your idea

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.92%. Comparing base (f84a98c) to head (a26c4e0).
Report is 25 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8025      +/-   ##
==========================================
+ Coverage   67.79%   67.92%   +0.13%     
==========================================
  Files         363      367       +4     
  Lines       16899    17323     +424     
==========================================
+ Hits        11456    11767     +311     
- Misses       4735     4823      +88     
- Partials      708      733      +25     

☔ View full report in Codecov by Sentry.
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[Leo6Leo]

/ok-to-test
It looks good to me! Except for the linter issues!
/cc @Cali0707

[Leo6Leo]

/lgtm
This looks great to me, thanks @prajjwalyd !
/cc @Cali0707

[Cali0707]

/approve

Thanks @prajjwalyd !!

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, prajjwalyd

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Needs approval from an approver in each of these files:

• hack/OWNERS [Cali0707]
• test/OWNERS [Cali0707]

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