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

Both files are migrated from the deprecated ioutil package to modern io and os packages. ReadFile calls are replaced with os.ReadFile, and ReadAll calls with io.ReadAll. Imports updated accordingly; no functional behavior changes.

Changes

Cohort / File(s)	Summary
ioutil package migration pkg/leaderelection/leaderelection.go, tests/e2e/lib/common_helpers.go	Replaced deprecated ioutil package with os and io packages. ioutil.ReadFile → os.ReadFile, ioutil.ReadAll → io.ReadAll. Imports updated to reflect changes. No logic or behavior changes.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Straightforward API migration following consistent patterns across files
• No logic complexity or behavioral changes
• Standard Go library modernization pattern

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

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Review profile: CHILL

Plan: Pro

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Knowledge base: Disabled due to Reviews -> Disable Knowledge Base setting

📥 Commits

Reviewing files that changed from the base of the PR and between 0e62027 and 3874350.

📒 Files selected for processing (2)

• pkg/leaderelection/leaderelection.go (2 hunks)
• tests/e2e/lib/common_helpers.go (4 hunks)

🧰 Additional context used

📓 Path-based instructions (1)

**

⚙️ CodeRabbit configuration file

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

Files:

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

🧬 Code graph analysis (1)

pkg/leaderelection/leaderelection.go (1)

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

• ReadFile (29-32)

🔇 Additional comments (5)

tests/e2e/lib/common_helpers.go (3)

6-6: LGTM! Correct import for io.ReadAll migration.

The io package import properly supports the migration from ioutil.ReadAll to io.ReadAll.

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29-32: LGTM! Correct migration from deprecated ioutil.ReadFile.

The function correctly uses os.ReadFile, maintaining identical behavior with the deprecated ioutil.ReadFile.

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285-299: LGTM! Correct migration from deprecated ioutil.ReadAll.

Both instances (lines 285 and 294) correctly use io.ReadAll to read the response body, maintaining identical behavior with the deprecated ioutil.ReadAll.

pkg/leaderelection/leaderelection.go (2)

7-7: LGTM! Correct import for os.ReadFile migration.

The os package import properly supports the migration from ioutil.ReadFile to os.ReadFile.

---

87-97: LGTM! Correct migration from deprecated ioutil.ReadFile.

The code correctly uses os.ReadFile to read the serviceaccount namespace file, maintaining identical behavior with the deprecated ioutil.ReadFile.

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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

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

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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]

@sebrandon1: The following test 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

Full PR test history. Your PR dashboard.

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. I understand the commands that are listed here.

[openshift-ci-robot]

/hold

Revision 3874350 was retested 3 times: holding