cloudrunv2: fix perpetual diff in templates.container.resources.limits block

[BBBmau]

Release Note Template for Downstream PRs (will be copied)

When a google_cloud_run_v2_service container sets only memory in resources.limits, the Cloud Run v2 API automatically populates a default cpu value server-side. On subsequent plans, Terraform sees cpu in state but not in config and proposes to remove it — a perpetual diff with no way for the user to resolve it.

The fix adds a DiffSuppressFunc on the limits field that silently accepts any key the API added but the user did not configure. A regression test deploys a service with memory-only limits, imports it, then asserts the second plan produces no diff.

Fixes: hashicorp/terraform-provider-google#20399

See Write release notes for guidance.

cloudrunv2: fix perpetual diff in `templates.container.resources.limits` block in `google_cloud_run_v2_service` resource

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit 3e17452:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	3 files changed, 161 insertions(+), 5 deletions(-)
google-beta provider	View Diff	3 files changed, 161 insertions(+), 5 deletions(-)

Test report

Analytics

Total Tests	Passed	Skipped	Affected
94	82	9	3

Affected Service Packages

• cloudrunv2

Learn how VCR tests work

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Step 1: Replaying Mode

Action taken

Found 3 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit.

Click here to see the affected tests

• TestAccCloudRunV2Service_cloudrunv2ServiceWithResourcesRequirements
• TestAccCloudRunV2Service_noPermadiffWithMemoryLimitOnly
• TestAccCloudRunV2Service_noPermadiffWithMinInstanceCount

View the replaying VCR build log

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Step 2: Recording Mode

Recording Mode	Replaying Rerun	Test Name
✅ Log	✅	TestAccCloudRunV2Service_noPermadiffWithMemoryLimitOnly
❌ Error · Log	-	TestAccCloudRunV2Service_cloudrunv2ServiceWithResourcesRequirements
❌ Error · Log	-	TestAccCloudRunV2Service_noPermadiffWithMinInstanceCount

Caution

Issues requiring attention before PR completion

🔴 Initial Recording Failed: Some tests failed during the recording step. See the table above for details.

Please address these issues to complete your PR. If you believe these detections are incorrect or unrelated to your change, please raise the concern with your reviewer.

View the recording VCR build log or the debug logs folder for detailed results.

@BBBmau, @zhengruan VCR tests complete for 3e17452!