Chris Farhood
9b9c503521
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Co-authored-by: Chris Farhood <chris@farhood.org> Co-committed-by: Chris Farhood <chris@farhood.org>
94 lines
3.8 KiB
Markdown
94 lines
3.8 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project
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Headlamp plugin for kube-vip virtual IP and load balancer visibility. Read-only — monitors kube-vip DaemonSet/pods, LoadBalancer services, nodes, IP pools, and leader election. No cluster write operations.
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- **Plugin name**: `kube-vip`
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- **Target**: Headlamp >= v0.26
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- **Data sources**: kube-vip DaemonSet/pods in `headlamp`, Services (type:LoadBalancer), Nodes, Leases, `kubevip` ConfigMap
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- **Reference plugin**: `../headlamp-polaris-plugin`
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## Commands
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```bash
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npm start # dev server with hot reload
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npm run build # production build
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npm run package # package for headlamp
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npm run tsc # TypeScript type check (no emit)
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npm run lint # ESLint
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npm run lint:fix # ESLint with auto-fix
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npm run format # Prettier write
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npm run format:check # Prettier check
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npm test # vitest run
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npm run test:watch # vitest watch mode
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```
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All tests and `tsc` must pass before committing.
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## Architecture
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```
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src/
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├── index.tsx # Plugin entry: registerRoute, registerSidebarEntry, registerDetailsViewSection
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├── test-helpers.tsx # Shared test utilities and fixtures
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├── api/
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│ ├── k8s.ts # Types + helpers (Services, Nodes, Pods, DaemonSets, Leases, ConfigMaps)
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│ └── KubeVipDataContext.tsx # Shared React context provider
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└── components/
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├── OverviewPage.tsx # Dashboard: deployment status, cluster summary, VIP overview
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├── ServicesPage.tsx # LoadBalancer services with VIP assignments and detail panel
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├── NodesPage.tsx # Nodes with kube-vip pod status and leader election
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├── ConfigPage.tsx # DaemonSet config, IP pools, leases, pod details
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├── ServiceDetailSection.tsx # Injected into Headlamp Service detail view
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└── __mocks__/
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└── commonComponents.ts # Test mocks for headlamp CommonComponents
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```
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## Data flow
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`KubeVipDataContext.tsx` uses **two fetching strategies**:
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1. **Headlamp hooks** (`K8s.ResourceClasses.*.useList()`) — for Services and Nodes.
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2. **`ApiProxy.request()`** — for kube-vip DaemonSet, pods (with label selector fallback for static pods), cloud-provider pods, Leases, and the `kubevip` ConfigMap.
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kube-vip uses **no CRDs**. All state comes from standard Kubernetes resources and `kube-vip.io/*` annotations on Services.
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## Key constants (src/api/k8s.ts)
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- Namespace: `headlamp`
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- DaemonSet name: `kube-vip-ds`
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- Cloud provider name: `kube-vip-cloud-provider`
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- ConfigMap name: `kubevip`
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- Annotation prefix: `kube-vip.io/`
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- Pod selector: `app.kubernetes.io/name=kube-vip-ds`
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- Cloud provider selector: `app=kube-vip-cloud-provider`
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- Metrics port: `2112`
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## Code conventions
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- Functional React components only — no class components
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- All imports from `@kinvolk/headlamp-plugin/lib` and `@kinvolk/headlamp-plugin/lib/CommonComponents`
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- No additional UI libraries (no MUI direct imports, no Ant Design, etc.)
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- TypeScript strict mode — no `any`, use `unknown` + type guards at API boundaries
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- Context provider (`KubeVipDataProvider`) wraps each route component in `index.tsx`
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- Tests: vitest + @testing-library/react, mock with `vi.mock('@kinvolk/headlamp-plugin/lib', ...)`
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- `vitest.setup.ts` provides a spec-compliant `localStorage` shim for Node 22+ compatibility
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## Testing
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Mock pattern for headlamp APIs:
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```typescript
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vi.mock('@kinvolk/headlamp-plugin/lib', () => ({
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ApiProxy: { request: vi.fn().mockResolvedValue({ items: [] }) },
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K8s: {
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ResourceClasses: {
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Service: { useList: vi.fn(() => [[], null]) },
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Node: { useList: vi.fn(() => [[], null]) },
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},
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},
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}));
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```
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