Migrate away from deprecated ioutil

[sebrandon1]

ioutil has been deprecated since Go 1.16: https://go.dev/doc/go1.16#ioutil

Tracking issue: redhat-best-practices-for-k8s/telco-bot#52

[coderabbitai]

Walkthrough

Replaced deprecated ioutil usage with modern os and io APIs: ioutil.ReadFile → os.ReadFile, ioutil.ReadAll → io.ReadAll. Imports updated; no functional or control-flow changes.

Changes

Cohort / File(s)	Summary
ioutil → os/io migration pkg/leaderelection/leaderelection.go, tests/e2e/lib/common_helpers.go	Replaced ioutil.ReadFile with os.ReadFile and ioutil.ReadAll with io.ReadAll. Updated imports (removed io/ioutil, added os and/or io). No behavioral changes.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

✨ Finishing touches

• 📝 Generate docstrings

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📥 Commits

Reviewing files that changed from the base of the PR and between 3874350 and 7ed5cc7.

📒 Files selected for processing (2)

• pkg/leaderelection/leaderelection.go
• tests/e2e/lib/common_helpers.go

🚧 Files skipped from review as they are similar to previous changes (1)

• pkg/leaderelection/leaderelection.go

🧰 Additional context used

📓 Path-based instructions (1)

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-Focus on major issues impacting performance, readability, maintainability and security. Avoid nitpicks and avoid verbosity.

Files:

• tests/e2e/lib/common_helpers.go

🔇 Additional comments (1)

tests/e2e/lib/common_helpers.go (1)

6-6: LGTM!

Clean migration from the deprecated ioutil package to the modern equivalents (os.ReadFile and io.ReadAll) as recommended since Go 1.16. The changes are correct and preserve existing behavior.

Also applies to: 29-32, 285-285, 294-294

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[weshayutin]

/retest

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaovilai, sebrandon1, shubham-pampattiwar, weshayutin

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Needs approval from an approver in each of these files:

• OWNERS [kaovilai,shubham-pampattiwar]

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[kaovilai]

/lgtm

[shubham-pampattiwar]

/retest

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD f8b06e8 and 2 for PR HEAD 3874350 in total

[kaovilai]

Did we add test cases recently.?

prow/pkg/entrypoint/run.go:169","func":"sigs.k8s.io/prow/pkg/entrypoint.Options.ExecuteProcess","level":"error","msg":"Process did not finish before 2h0m0s timeout","severity":"error","time":"2025-12-06T01:35:01Z"}
{"component":"entrypoint","file":"sigs.k8s.io/prow/pkg/entrypoint/run.go:267

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 7a8aba0 and 1 for PR HEAD 3874350 in total

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD f75a38d and 0 for PR HEAD 3874350 in total

[openshift-ci-robot]

/hold

Revision 3874350 was retested 3 times: holding

[openshift-ci]

New changes are detected. LGTM label has been removed.

[kaovilai]

/retest

[openshift-ci]

@sebrandon1: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/4.20-e2e-test-cli-aws	3874350	link	true	/test 4.20-e2e-test-cli-aws
ci/prow/4.21-e2e-test-aws	7ed5cc7	link	true	/test 4.21-e2e-test-aws
ci/prow/4.21-e2e-test-cli-aws	7ed5cc7	link	false	/test 4.21-e2e-test-cli-aws

Full PR test history. Your PR dashboard.

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