Lambda Intergration with other AWS Services (Auto-Invoked / Induced Invoke with SDK/API) | Overview.

Lambda Intergration with other AWS Services (Auto-Invoked / Induced Invoke with SDK) - Overview.

Scope:

• Intro,
• Lambda Integration Categories Event Sources ( Auto-Triggers Lambda),
• Lambda Integration Categories Event Sources ( Induced-Triggers with SDK/API to Lambda),
• Security & Identity Integrations,
• Sample Thumbnail Archtecture & Integration of Lambda.

Intro:

• Here’s twtech comprehensive list of AWS services that integrate with AWS Lambda, organized by category for clarity:

 Lambda Integration Categories Event Sources (Triggers Lambda)

NB:

• These services can invoke Lambda automatically based on an event:

Category	Service	Description
Compute.	API Gateway	HTTP requests trigger Lambda (REST or HTTP APIs)
	AWS App Runner	Custom health checks using Lambda
Storage.	Amazon S3	Trigger on object upload, delete, etc.
Database.	Amazon DynamoDB	Trigger on table updates via Streams
	Amazon Aurora (MySQL/PostgreSQL)	Trigger from DB events using stored procedures
Messaging.	Amazon SNS	Publish/subscribe messaging – trigger Lambda on topic
	Amazon SQS	Message queue triggers Lambda
Analytics.	Amazon Kinesis Data Streams	Real-time data stream processing
	Amazon MSK (Kafka)	Kafka topics trigger Lambda
Monitoring.	Amazon EventBridge / CloudWatch Events	Scheduled events or system events
	CloudWatch Logs	Stream logs to Lambda for analysis
IoT.	AWS IoT Core	Trigger on device messages
App Services.	Amazon Lex / Alexa	Trigger Lambda for chatbot or voice interactions

 Lambda Integration Categories Services That Lambda Can Call (via SDK/API)

NB:

• Lambda can use the AWS SDK to interact with any AWS service, such as:

Category	Service	Use Case
Storage.	Amazon S3	Read/write files
Database.	DynamoDB	CRUD operations on NoSQL data
	Amazon RDS / Aurora	Connect using RDS Proxy or direct drivers
Compute.	EC2 / ECS / EKS	Start, stop, or manage compute resources
AI/ML.	Amazon Rekognition	Image/video analysis
	Amazon Comprehend	Natural language processing
	Amazon Translate / Polly / Textract	Language and document AI
Notifications.	SNS / SQS	Send messages or queue tasks
Security.	AWS IAM	Manage roles and policies (rarely directly)
	AWS Secrets Manager / SSM Parameter Store	Retrieve secure configs
DevOps.	CloudFormation	Automate infrastructure
	CodePipeline / CodeBuild	Custom build or deployment steps
Billing.	AWS Cost Explorer	Monitor cost or usage programmatically

 Security & Identity Integrations

Service	Purpose
IAM (Identity & Access Management).	Manage Lambda permissions and execution roles
Resource-based policies.	Control which services/users can invoke the Lambda
VPC.	Connect Lambda to private subnets/resources
Cognito.	Use Lambda in authentication/authorization flows

 twtech Sample Thumbnail Archtecture & Integration of Lambda:

• A twtech-user uploads a profile photo to S3 → This triggers a Lambda function → Lambda resizes the image and stores it back in another S3 bucket → Sends a notification via SNS → Logs are saved to CloudWatch Logs.