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Validate Edge CDN Cache Invalidation for Multi-Tenant Services with DeployClaw Cloud Architect Agent

Automate Edge CDN Cache Invalidation Validation in AWS + SQL

The Pain (Manual Cache Validation)

Cache invalidation across multi-tenant CloudFront distributions is a distributed systems problem masquerading as an ops task. Teams typically maintain spreadsheets tracking tenant-specific invalidation requests, edge location propagation times, and cache headers—a practice that compounds latency issues and creates operational blind spots.

Without programmatic validation, you're relying on tribal knowledge: "Deploy to us-east-1, wait 45 seconds, check three regions manually." When CloudFront's 12-hour TTL interacts poorly with your multi-tenant routing logic, regressions surface in production traffic patterns, not pre-deployment. By then, your rollback window has narrowed from minutes to seconds. The root cause? No systematic verification that invalidation payloads reached all edge locations, that cache control headers propagated correctly, or that tenant isolation remains intact post-invalidation. Human error cascades: a missed region, a misconfigured S3 origin, a forgotten query string parameter in your cache key.

The result: incident response becomes archaeology—diagnosing why tenant A sees stale assets while tenant B sees fresh ones, buried in CloudWatch logs three regions deep.

The DeployClaw Advantage

The Cloud Architect Agent executes cache invalidation validation through OS-level infrastructure interactions, not text-based recommendations. It operates according to internal SKILL.md protocols that:

  1. Query your AWS account directly via STS temporary credentials
  2. Inspect CloudFront distribution configs for multi-tenant origin mappings
  3. Execute SQL lookups against your tenant registry and cache metadata tables
  4. Validate propagation state by polling edge location TTL headers across regions
  5. Generate compliance reports tied to specific tenants and SLAs

This is genuine infrastructure-as-code execution. The agent doesn't suggest what to validate—it runs the validation, logs each decision, and halts deployment if thresholds are breached.

Technical Proof: Before and After

Before (Manual Validation—Error-Prone)

# Spreadsheet-driven, human-executed
aws cloudfront create-invalidation --distribution-id E1234ABCD \
  --paths "/*" 2>/dev/null | jq .
# Hope the invalidation was created
# Manually check 3 regions in CloudFront console
# Email tenant stakeholders when done
# No systematic check: did query strings get cleared?

After (DeployClaw Cloud Architect Agent Execution)

// Agent-driven, OS-level validated
await agent.validateCDNInvalidation({
  distributionId: "E1234ABCD",
  tenants: ["acme-corp", "zenith-inc"],
  regions: ["us-east-1", "eu-west-1", "ap-northeast-1"],
  cacheKeyValidation: true,
  slaThreshold: 120 // seconds
});
// Agent polls until all edge locations report cleared cache
// Verifies tenant isolation: no cross-tenant data leakage
// Blocks deployment if propagation incomplete
// Returns signed audit trail for compliance

The Agent Execution Log

{
  "execution_id": "inv-67f8a3c2e1d92f4",
  "agent": "Cloud Architect",
  "task": "validate_cdn_cache_invalidation_multi_tenant",
  "timestamp": "2025-01-16T14:32:08.421Z",
  "steps": [
    {
      "step": 1,
      "action": "authenticate_aws_account",
      "status": "success",
      "detail": "STS credentials assumed, scope: CloudFront read + SNS publish"
    },
    {
      "step": 2,
      "action": "inspect_distribution_config",
      "distribution_id": "E1234ABCD",
      "status": "success",
      "detail": "Found 14 origin bindings. Multi-tenant routing via Host header. Cache key includes tenant_id."
    },
    {
      "step": 3,
      "action": "query_tenant_registry",
      "query": "SELECT tenant_id, origin_domain, cache_ttl FROM tenants WHERE active=true",
      "status": "success",
      "rows_returned": 12,
      "detail": "Tenant list synced. 12 active tenants mapped to 8 S3 origins."
    },
    {
      "step": 4,
      "action": "create_invalidation_batch",
      "paths": ["/*"],
      "status": "success",
      "invalidation_id": "I2U3K8P9Q2X5",
      "detail": "Invalidation request dispatched. Assigned to 47 edge locations."
    },
    {
      "step": 5,
      "action": "poll_edge_location_ttl",
      "regions": ["us-east-1", "eu-west-1", "ap-northeast-1"],
      "status": "in_progress",
      "polling_interval": 5000,
      "max_wait": 120000,
      "detail": "Polling headers from 12 geographically distributed edge nodes. Monitoring cache age and ETag mutation."
    },
    {
      "step": 6,
      "action": "validate_tenant_isolation",
      "test_vector": "cross_origin_request_attempt",
      "status": "success",
      "detail": "Confirmed: tenant_A cannot retrieve tenant_B assets post-invalidation. CloudFront origin isolation intact."
    },
    {
      "step": 7,
      "action": "verify_cache_key_parameters",
      "expected_keys": ["tenant_id", "version", "query_string"],
      "status": "success",
      "detail": "Cache key parameters correct. Query string not stripped. Prevents collisions on parameterized assets."
    },
    {
      "step": 8,
      "action": "poll_all_regions_converged",
      "regions_cleared": 47,
      "total_regions": 47,
      "status": "success",
      "elapsed_seconds": 38,
      "detail": "All 47 edge locations report cache age < 5 seconds. Invalidation propagated globally."
    },
    {
      "step": 9,
      "action": "generate_audit_log",
      "format": "compliance_report",
      "status": "success",
      "detail": "Report includes: tenant list, invalidation ID, propagation timeline, isolation test results. Signed with KMS key."
    },
    {
      "step": 10,
      "action": "deployment_gate_decision",
      "status": "proceed",
      "reasoning": "All 12 tenants validated. Propagation complete. SLA threshold met (38s < 120s). Tenant isolation verified.",
      "exit_code": 0
    }
  ],
  "summary": {
    "total_duration_ms": 41238,
    "tenants_validated": 12,
    "edge_locations_checked": 47,
    "propagation_success_rate": "100%",
    "audit_trail_signed": true,
    "safe_to_deploy": true
  }
}

Why This Matters

The log above represents what happens when you eliminate the spreadsheet and tribal knowledge. The agent:

  • Discovers your actual infrastructure topology (14 origins, not 3)
  • Validates at scale (47 edge nodes, not 3 manual spot-checks)
  • Enforces SLAs programmatically (38 seconds < 120 second threshold)
  • Verifies security properties (tenant isolation, no data leakage)
  • Generates compliance artifacts (signed audit trails for SOC 2)
  • Blocks deployments that fail—no rollback surprises

This is how regressions get caught before production traffic. Your rollback window stays wide because you've validated globally before taking user requests.

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