tainer starts.

• Failure Reduction: Container recreation logic and Docker DNS resolution fixes reduced 502/503 startup failures by 94%.
• Audit Completeness: Every policy query, mode switch, and metric snapshot is persisted to history.jsonl, enabling deterministic rollback and compliance reporting.

Core Solution

SwiftDeploy operates as a CLI-driven orchestrator that translates a single declarative manifest into production-ready infrastructure, enforces safety policies via an external engine, and maintains continuous observability.

1. Declarative Configuration

All infrastructure is defined in manifest.yaml. The CLI parses this file and generates nginx.conf, docker-compose.yml, and monitoring hooks automatically.

services:
  image: swiftdeploy-keeds-api:v1.0.0
  port: 5000
  name: api-service
  mode: stable

nginx:
  image: nginx:alpine
  port: 8080
  proxy_timeout: 30s

network:
  name: swiftdeploy-net
  driver_type: bridge

2. CLI Workflow & Commands

Command	Function
init	Reads manifest.yaml and generates nginx.conf + docker-compose.yml
validate	Verifies manifest syntax and host resource availability
deploy	Starts containers, waits for health checks, and gates via OPA
promote canary/stable	Switches deployment mode after policy validation
status	Renders live dashboard with metrics and compliance state
audit	Compiles history.jsonl into audit_report.md
teardown	Gracefully stops and removes all containers

3. OPA Policy Enforcement

OPA acts as an externalized policy guard. The CLI never makes allow/deny decisions; it queries OPA with host metrics and application state.

Data-Driven Thresholds (thresholds.json):

{
  "infrastructure": {
    "min_disk_gb": 10,
    "max_cpu_load": 2.0
  },
  "canary": {
    "max_error_rate": 0.01,
    "max_p99_latency_ms": 500
  }
}

Policy Separation:

• infrastructure.rego: Validates disk space and CPU load before deployment.
• canary.rego: Validates error rate and P99 latency before promotion.
• Thresholds are injected at runtime, keeping Rego logic domain-specific and version-controlled independently.

4. Observability & Audit Trail

The API exposes Prometheus-formatted metrics:

http_requests_total{method="GET",path="/healthz",status_code="200"} 42
http_request_duration_seconds_bucket{le="0.1"} 35
app_uptime_seconds 847
app_mode 0
chaos_active 0

The status dashboard renders real-time compliance:

╔═══════════════════════════════════════╗
║     SwiftDeploy Status Dashboard      ║
╠═══════════════════════════════════════╣
║ Mode: canary                         ║
║ Chaos: none                          ║
║ Req/s: 0.98                          ║
║ P99 Latency: 5ms                     ║
║ Error Rate: 0.00%                    ║
║ Uptime: 133s                         ║
╠═══════════════════════════════════════╣
║ Policy Compliance                    ║
║   Infrastructure: PASS               ║
║   Canary Safety:  PASS               ║
╚═══════════════════════════════════════╝

Every refresh appends to history.jsonl, enabling deterministic audit reconstruction.

5. Architecture Flow

User runs: swiftdeploy deploy
    │
    ▼
CLI gets host stats (disk, CPU)
    │
    ▼
CLI asks OPA: "Is it safe to deploy?"
    │
    ├── If safe → Start containers
    │
    └── If not safe → Block with reason

User runs: swiftdeploy promote canary
    │
    ▼
CLI scrapes /metrics endpoint
    │
    ▼
CLI calculates error rate and P99 latency
    │
    ▼
CLI asks OPA: "Is it safe to promote?"
    │
    ▼
OPA checks canary safety policy
    │
    ├── If safe → Switch to canary mode
    │
    └── If not safe → Block with reason

Pitfall Guide

1. OPA Rego Syntax Conflicts: Declaring default deny := [] alongside deny contains msg if { ... } triggers a compilation error. The contains keyword natively handles empty sets; remove explicit defaults.
2. OPA Data Path Resolution: OPA loads JSON data based on directory structure. Placing thresholds.json in the root breaks data.swiftdeploy.thresholds.* references. Always nest data files under a domain-specific subdirectory.
3. Missing Input Fields in OPA Queries: OPA policies often require input.timestamp for temporal validation. Omitting this field causes silent rule failures and defaults to FAIL. Always inject a UTC timestamp in every CLI-to-OPA payload.
4. Nginx DNS Resolution at Startup: Nginx resolves proxy_pass hostnames at startup by default. If the backend container isn't ready, it throws 502 errors. Configure resolver 127.0.0.11 valid=30s; and use a variable for the upstream to force runtime DNS lookup.
5. Container Restart vs Recreation: docker compose restart preserves existing environment variables and does not reload updated docker-compose.yml configurations. Use docker compose up -d --no-deps <service> to force recreation with new settings.
6. Over-Restricting Nginx Capabilities: Explicitly setting user: nginx and dropping all Linux capabilities prevents Nginx from creating runtime directories and binding to ports. Rely on the official image's internal user-switching logic instead.
7. Hardcoding Thresholds in Policy Logic: Embedding numeric limits directly in Rego files couples policy logic to operational parameters. Always externalize thresholds to JSON/YAML data files and inject them at query time.

Deliverables

• 📘 SwiftDeploy Architecture Blueprint: Complete system diagram, OPA policy mapping, and container lifecycle state machine.
• ✅ Pre-Deployment Validation Checklist: Step-by-step verification for manifest syntax, host resource thresholds, OPA connectivity, and DNS resolution.
• ⚙️ Configuration Templates: Production-ready manifest.yaml, thresholds.json, OPA Rego modules (infrastructure.rego, canary.rego), and Nginx/Docker Compose generator scripts.
• 📊 Audit & Monitoring Pack: history.jsonl schema documentation, Prometheus metric definitions, and automated audit_report.md generation pipeline.