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API Gateway

Overview​

The APIGateway resource manages AWS API Gateway v2 APIs, supporting REST, HTTP, and WebSocket protocols.

Use Cases​

  • REST APIs: Traditional RESTful APIs
  • HTTP APIs: Modern, low-latency HTTP APIs
  • WebSocket APIs: Real-time bidirectional communication
  • Microservices: API management and routing

Basic Example​

Example:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: my-api
  namespace: default
spec:
  providerRef:
    name: aws-provider

  # API name
  name: my-rest-api

  # Description
  description: Production REST API

  # Protocol: REST, HTTP, or WEBSOCKET
  protocolType: REST

  # Endpoint: REGIONAL, EDGE, or PRIVATE
  endpointType: REGIONAL

  # Tags
  tags:
    Environment: production

  # Deletion policy
  deletionPolicy: Delete

Spec Fields​

FieldTypeRequiredDescription
providerRefObjectYesReference to AWSProvider
nameStringYesAPI name
descriptionStringNoAPI description
protocolTypeStringNoREST (default), HTTP, or WEBSOCKET
endpointTypeStringNoREGIONAL (default), EDGE, or PRIVATE
disableExecuteApiEndpointBooleanNoDisable default endpoint
corsConfigurationObjectNoCORS settings (HTTP APIs only)
tagsMapNoKey-value tags
deletionPolicyStringNoDelete, Retain, or Orphan

Status Fields​

FieldDescription
readyBoolean indicating if API is ready
apiIdAWS API Gateway ID
apiEndpointInvoke URL
protocolTypeConfigured protocol type

Protocol Types​

REST API​

Traditional REST APIs with full features:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: rest-api
spec:
  providerRef:
    name: aws-provider
  name: my-rest-api
  protocolType: REST
  endpointType: REGIONAL

Features:

  • API keys and usage plans
  • Request/response transformations
  • Caching
  • Authorizers (Lambda, Cognito, IAM)

HTTP API​

Low-cost, low-latency HTTP APIs:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: http-api
spec:
  providerRef:
    name: aws-provider
  name: my-http-api
  protocolType: HTTP
  endpointType: REGIONAL
  corsConfiguration:
allowOrigins:
      - "*"
allowMethods:
      - GET
      - POST
      - PUT
      - DELETE
allowHeaders:
      - Content-Type
      - Authorization
maxAge: 300

Benefits:

  • 71% cheaper than REST
  • Lower latency
  • Native CORS support
  • JWT authorizers

WebSocket API​

Real-time bidirectional communication:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: websocket-api
spec:
  providerRef:
    name: aws-provider
  name: my-websocket-api
  protocolType: WEBSOCKET

Use Cases:

  • Chat applications
  • Real-time dashboards
  • Gaming
  • Live updates

Endpoint Types​

Regional (Default)​

Deployed in specific region:

endpointType: REGIONAL

Best for:

  • Same-region clients
  • VPC access
  • Private APIs

Edge-Optimized​

Uses CloudFront for global distribution:

endpointType: EDGE

Best for:

  • Global clients
  • Static content
  • Reduced latency

Private​

VPC-only access:

endpointType: PRIVATE

Best for:

  • Internal APIs
  • VPC peering
  • No internet exposure

CORS Configuration (HTTP APIs)​

Example:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: cors-enabled-api
spec:
  providerRef:
    name: aws-provider
  name: api-with-cors
  protocolType: HTTP
  corsConfiguration:
# Allow all origins
allowOrigins:
      - "*"

# Allowed methods
allowMethods:
      - GET
      - POST
      - PUT
      - PATCH
      - DELETE
      - OPTIONS

# Allowed headers
allowHeaders:
      - Content-Type
      - Authorization
      - X-Api-Key

# Exposed headers
exposeHeaders:
      - X-Request-Id

# Max age in seconds
maxAge: 86400

# Allow credentials
allowCredentials: true

Advanced Examples​

Private API with VPC Endpoint​

Example:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: private-api
spec:
  providerRef:
    name: aws-provider
  name: internal-api
  protocolType: HTTP
  endpointType: PRIVATE
  # VPC endpoint integration configured separately
  tags:
    Access: private

Disable Default Execute-API Endpoint​

Example:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: custom-domain-only
spec:
  providerRef:
    name: aws-provider
  name: my-api
  protocolType: HTTP
  disableExecuteApiEndpoint: true  # Force custom domain usage
  tags:
    CustomDomain: required

Multi-Region API​

Example:

---
apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: api-us-east-1
  namespace: production
spec:
  providerRef:
    name: aws-provider-us-east-1
  name: global-api-us-east-1
  protocolType: HTTP
  endpointType: REGIONAL
---
apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: api-eu-west-1
  namespace: production
spec:
  providerRef:
    name: aws-provider-eu-west-1
  name: global-api-eu-west-1
  protocolType: HTTP
  endpointType: REGIONAL

Monitoring​

Check API Gateway status:

kubectl get apigateway my-api -o yaml

Example output:

status:
  ready: true
  apiId: abc123xyz
  apiEndpoint: https://abc123xyz.execute-api.us-east-1.amazonaws.com
  protocolType: HTTP

Access the API:

curl https://abc123xyz.execute-api.us-east-1.amazonaws.com

Integration Examples​

With Lambda Function​

After creating the API, configure integration (done separately):

# Route configuration (example)
Route: GET /users
Integration: Lambda function ARN

With ALB​

Example:

# Route configuration (example)
Route: ANY /{proxy+}
Integration: ALB ARN or VPC Link

With HTTP Endpoint​

Example:

# Route configuration (example)
Route: GET /api/{proxy+}
Integration: https://backend.example.com/{proxy}

Best Practices​

Best Practices
  • Enable API caching — Reduces backend load and latency
  • Configure throttling — Protect backend from traffic spikes
  • Use custom domain names — Professional URLs with your domain
  • Enable CloudWatch logging — Debug and monitor API performance
  • Version your APIs — Use stages for v1, v2 versioning strategy

Troubleshooting​

API Not Accessible​

Check:

  • Endpoint type matches access pattern
  • VPC endpoint configured for PRIVATE
  • Routes and integrations deployed

CORS Errors​

Verify:

  • corsConfiguration is set (HTTP APIs only)
  • allowOrigins includes request origin
  • allowMethods includes request method

High Latency​

Consider:

  • Use HTTP API instead of REST
  • Enable caching (REST APIs)
  • Use REGIONAL endpoint for same-region clients

Complete Example​

Example:

apiVersion: aws-infra-operator.runner.codes/v1alpha1
kind: APIGateway
metadata:
  name: production-api
  namespace: production
spec:
  providerRef:
    name: aws-provider

  # API configuration
  name: prod-http-api
  description: Production HTTP API for microservices
  protocolType: HTTP
  endpointType: REGIONAL

  # CORS for web apps
  corsConfiguration:
allowOrigins:
      - https://app.example.com
      - https://admin.example.com
allowMethods:
      - GET
      - POST
      - PUT
      - DELETE
allowHeaders:
      - Content-Type
      - Authorization
exposeHeaders:
      - X-Request-Id
maxAge: 3600
allowCredentials: true

  # Tags
  tags:
    Environment: production
    Team: platform
    CostCenter: engineering

  # Retention
  deletionPolicy: Retain

AWS Documentation​