[roeezolantz]

Rejects a malformed psc_consumer_subnet_cidr at plan time instead of failing in the GCP API, from the #11 review. No infra change for existing envs.

What changed

• psc_consumer_subnet_cidr validation: must parse as an IPv4 CIDR (cidrnetmask, which rejects IPv6)

Test

terraform validate passes; the condition is true for 10.0.2.0/29 and false for 2001:db8::/64, not-a-cidr, 10.0.2.0 and 300.0.0.0/29.

Summary by CodeRabbit

• Bug Fixes
  • Added validation for consumer subnet CIDR values.
  • Invalid or unparseable IPv4 CIDR inputs now produce a clear error message.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 7e5f968c-4173-44e6-b4df-672cbf4cd2b3

📥 Commits

Reviewing files that changed from the base of the PR and between a23614c and 6589228.

📒 Files selected for processing: 1

• compute/variables.tf

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

• compute/variables.tf

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📝 Walkthrough

The psc_consumer_subnet_cidr variable now validates that its value parses as an IPv4 CIDR. Invalid values produce an explicit error.

Changes: PSC subnet validation

Layer / File(s)	Summary
Validate the PSC subnet CIDR compute/variables.tf	The variable uses cidrhost to validate the CIDR value and rejects invalid values with an IPv4-CIDR error.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix

Suggested reviewers: liorbond

Merge Risk: ⚪ Minimal · up to 65892

The PSC subnet now rejects IPv6 CIDRs before they reach the GCP subnet configuration. No actionable merge-blocking risk remains.

Architecture risk: 🔵 Low · up to a2361

The change affects 1 system.

Changed systems: compute

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — compute (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in compute/variables.tf: psc_consumer_subnet_cidr now validates that its value is a valid CIDR address using cidrhost; invalid values produce an IPv4-CIDR error.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding validation for psc_consumer_subnet_cidr.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
Review comments at @compute/variables.tf:
- Line 64: Update the validation condition for psc_consumer_subnet_cidr to use
the IPv4-only cidrnetmask function instead of cidrhost, preserving the
variable’s IPv4-only contract and rejecting IPv6 CIDRs.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 836b261a-0477-4b35-bdb0-f175b68fe507

📥 Commits

Reviewing files that changed from the base of the PR and between 2616344 and a23614c.

📒 Files selected for processing: 1

• compute/variables.tf

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 7 remain after this review.

[haimbj1]

This passes 10.0.2.1/29 and /30–/32, and GCP rejects both at apply. Also require a network address and a prefix of /29 or shorter.

Suggested change

	condition = can(cidrnetmask(var.psc_consumer_subnet_cidr))
	condition = (
	can(cidrnetmask(var.psc_consumer_subnet_cidr)) &&
	try(cidrsubnet(var.psc_consumer_subnet_cidr, 0, 0) == var.psc_consumer_subnet_cidr, false) &&
	try(tonumber(split("/", var.psc_consumer_subnet_cidr)[1]) <= 29, false)
	)

[guya-fhenix]

Minor · With the condition from haimbj1's suggestion on line 64, this message is wrong for 10.0.2.1/29 and /30, because both are IPv4 CIDRs. Say what the check requires.

Suggested change

	error_message = "psc_consumer_subnet_cidr must be an IPv4 CIDR such as 10.0.2.0/29."
	error_message = "psc_consumer_subnet_cidr must be an IPv4 network address with a prefix of /29 or shorter, such as 10.0.2.0/29."