domain-cloud-native
Design constraints and patterns for building stateless, observable cloud-native applications in Rust.
- Enforces stateless design, graceful shutdown with SIGTERM handling, and 12-factor configuration via environment variables to support Kubernetes orchestration and zero-downtime deployments
- Requires distributed tracing with
tracingand OpenTelemetry, plus dedicated/healthand/readyendpoints for liveness and readiness probes - Recommends key crates:
tonicfor gRPC services,kubeandkube-runtimefor Kubernetes operators,prometheusfor metrics, andtokio::signalfor graceful termination - Traces design decisions down to Layer 2 patterns (span lifecycle, signal handling, connection draining) and Layer 1 implementations (Arc-wrapped external clients, tokio signal handlers)
Cloud-Native Domain
Layer 3: Domain Constraints
Domain Constraints → Design Implications
| Domain Rule | Design Constraint | Rust Implication |
|---|---|---|
| 12-Factor | Config from env | Environment-based config |
| Observability | Metrics + traces | tracing + opentelemetry |
| Health checks | Liveness/readiness | Dedicated endpoints |
| Graceful shutdown | Clean termination | Signal handling |
| Horizontal scale | Stateless design | No local state |
| Container-friendly | Small binaries | Release optimization |
Critical Constraints
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