ROSAENG-63138: Add regional control plane architecture design doc - #730
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📝 WalkthroughWalkthroughAdded a Regional Control Plane Architecture document and linked it from the documentation index. The document describes PostgreSQL-backed reconciliation, component interactions, rejected alternatives, consequences, reliability, observability, performance, and regional cost considerations. ChangesRegional Control Plane Architecture
Estimated code review effort: 2 (Simple) | ~10 minutes Possibly related PRs
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
Comment |
Documents the hyperfleet-operator + hyperfleet-db architecture: controller-runtime reconciliation backed by PostgreSQL instead of etcd. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Actionable comments posted: 3
🧹 Nitpick comments (2)
docs/design/regional-control-plane-architecture.md (2)
24-34: 🗄️ Data Integrity & Integration | 🔵 Trivial | ⚡ Quick winShow the status return path in the diagram.
Line [41] describes status flowing from kube-applier to DynamoDB and back to the operator. The Mermaid diagram shows only the desire write path. Add the status path, or label the diagram as a simplified write-path view.
Also applies to: 39-41
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@docs/design/regional-control-plane-architecture.md` around lines 24 - 34, Update the Mermaid graph around the DynamoDB and Operator relationships to show the status return path from kube-applier through DynamoDB back to hyperfleet-operator, matching the flow described later in the document. If that path cannot be represented, explicitly label the diagram as a simplified write-path view.
1-7: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick winAdd or verify ADR status and decision metadata.
The document has Context, Design, Alternatives, Rationale, and Consequences, but no explicit decision status or Decision field. Add the repository-standard ADR metadata, or confirm that this repository intentionally uses this format for architecture documents.
As per path instructions,
docs/design/**design decisions must be reviewed for ADR format compliance.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@docs/design/regional-control-plane-architecture.md` around lines 1 - 7, Add repository-standard ADR metadata to the “Regional Control Plane Architecture” document, including explicit decision status and decision fields alongside the existing “Last Updated Date” metadata. If this repository intentionally uses a different architecture-document format, verify and document that convention instead, while preserving the existing design content.Source: Path instructions
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@docs/design/regional-control-plane-architecture.md`:
- Around line 65-66: Update the component-count and operational-overhead
comparisons in the regional architecture discussion to remain explicitly scoped
to the reconcile loop, or replace both sides with comparable total-architecture
counts. Ensure references near “Component count” and “Operational overhead” do
not imply that 2 versus 5+ represents all deployable services.
- Around line 39-48: The architecture document must explicitly define ownership
for each state type: clarify whether PostgreSQL is the source of truth for
operator CRDs and DynamoDB is only an integration store for desires and observed
status, or document the actual model. Update the sections around the
hyperfleet-db description and the corresponding consequence text, plus the
diagram, so all statements consistently reflect that ownership.
- Around line 52-58: Update the PostgreSQL rationale and related recovery
statements to document the Terraform-provisioned Aurora topology: one writer
instance, no Aurora Replica, and regional storage replication. Replace the
inaccurate “RDS synchronous standby” claim, distinguish storage durability from
instance failover, and state RPO 0 only for a tested, explicitly scoped regional
failure scenario; otherwise record the tested RPO and recovery behavior in the
relevant sections.
---
Nitpick comments:
In `@docs/design/regional-control-plane-architecture.md`:
- Around line 24-34: Update the Mermaid graph around the DynamoDB and Operator
relationships to show the status return path from kube-applier through DynamoDB
back to hyperfleet-operator, matching the flow described later in the document.
If that path cannot be represented, explicitly label the diagram as a simplified
write-path view.
- Around line 1-7: Add repository-standard ADR metadata to the “Regional Control
Plane Architecture” document, including explicit decision status and decision
fields alongside the existing “Last Updated Date” metadata. If this repository
intentionally uses a different architecture-document format, verify and document
that convention instead, while preserving the existing design content.
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docs/README.mddocs/design/regional-control-plane-architecture.md
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Summary
docs/design/regional-control-plane-architecture.mddocumenting the hyperfleet-operator + hyperfleet-db architectureJira: https://redhat.atlassian.net/browse/ROSAENG-63138
Test plan
🤖 Generated with Claude Code
Summary by CodeRabbit