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cloud-services/README.md

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# Cloud Services
Refactored cloud microservices from project-ai.
## Structure
```
cloud-services/
├── pkg/ # Shared Go packages
│ ├── kafka/ # Pure Go Kafka client (franz-go)
│ ├── redis/ # Redis connection pool
│ ├── dbc/ # CAN database signal definitions
│ ├── can-go/ # CAN protocol library
│ └── ... # Other shared modules
├── services/
│ └── gateway/ # API gateway service
│ └── Dockerfile # Service-specific Dockerfile
├── deploy/
│ ├── base/ # Base k8s manifests (configMapGenerator)
│ │ ├── kustomization.yaml
│ │ └── config.env # Common environment config
│ └── overlays/
│ └── development/ # Dev environment overlay
│ ├── kustomization.yaml
│ ├── secrets.yaml
│ └── services/
│ └── gateway/
│ ├── deployment.yaml
│ ├── ingress.yaml
│ └── external-secret.yaml
├── argocd-apps/
│ └── development/
│ └── cloud-services.yaml # ArgoCD Application
└── scripts/ # Build and utility scripts
```
## Quick Start
```bash
# Build all
go build ./...
# Build gateway
go build ./services/gateway
# Run tests
go test ./...
# Build Docker image (arm64 for Mac Mini cluster)
docker build --platform linux/arm64 -t localhost:32000/gateway:latest -f services/gateway/Dockerfile .
```
## Services
### Gateway
WebSocket gateway for TRex, HMI, and Mobile connections. Handles auth, message routing to Kafka.
- Port 8077: HTTP/WebSocket
- Port 11011: Health check
## Development
### Prerequisites
- Go 1.25+
- Docker (for container builds)
- devbox (optional, for consistent dev environment)
### Module Structure
Uses Go workspaces (`go.work`) for local development:
- `./pkg` - shared packages
- `./pkg/can-go` - CAN protocol library
- `./services/gateway` - gateway service
### Generating DBC Code
CAN signal definitions are generated from DBC files. See `pkg/dbc/README.md`.
```bash
./scripts/generate-dbc.sh /path/to/dbc/files
```
## Deployment
### Kustomize Structure
Uses `configMapGenerator` with hash suffixes for automatic rolling updates when config changes:
```bash
# Preview what will be deployed
kustomize build deploy/overlays/development
# Apply directly (without ArgoCD)
kustomize build deploy/overlays/development | kubectl apply -f -
```
### ArgoCD
The `argocd-apps/development/cloud-services.yaml` Application points to `deploy/overlays/development` and auto-syncs changes from git.
### Secrets
Database credentials are managed via ExternalSecrets from Vault:
- `cloud-db-credentials` - DB_PASSWORD, MONGO_USER, MONGO_PASSWORD
## Environment Variables
Configured in `deploy/base/config.env`:
| Variable | Default | Description |
|----------|---------|-------------|
| `DB_HOST` | `cloud-dev-rw.cnpg-system.svc.cluster.local` | PostgreSQL host |
| `KAFKA_HOSTS` | `cloud-dev-kafka-bootstrap.kafka.svc.cluster.local:9092` | Kafka brokers |
| `REDIS_HOST` | `cloud-dev.redis.svc.cluster.local` | Redis host |
| `REDIS_PORT` | `6379` | Redis port |
| `MONGO_HOST` | `cloud-dev-svc.mongodb.svc.cluster.local` | MongoDB host |
| `OIDC_ISSUER` | Keycloak URL | OIDC issuer for JWT validation |
| `LOG_LEVEL` | `info` | Log level |