Amazon Simple Notification Service¶

TLDR¶

Message queue with a subscriber model. It can send the same message to a lot of different services at once. Scales good but not indefinitely.

Features¶

• subscriber async model
• Pub / sub model.
• One producer multiple consumers/subscribers
• up to 12 million subscriptions per topic
• up to 100k topics.

Sources¶

• CloudWatch alarms
• ASG Notifications
• AWS Budgets AWSBilling
• Lambda
• DynamoDB
• Cloudformation

Targets¶

• Kinesis Data Firehouse
• docs/messaging/SQS
• Lambda
• HTTP
• E-Mail
• push
• SMS

Topic Publish¶

• create a topic
• add subscriptions to topic
• publish to the topic

Direct Publish¶

• for mobile apps
• create platform app
• create platform endpoint
• publish to endpoint
• Google GCM
• Apple APNS.
• Amazon ADM.

Security¶

• HTTPS by default
• at rest using KMS
• client side optional
• IAM for access control
• SNS access policies
  • resource based for cross account or other services.

FIFO¶

• same as docs/messaging/SQS FIFO
• ordering by message group id (all message in the same group are ordered)
• deduplication using deduplication Id or content based deduplication.
• Only SQS FIFO can be a subscriber.

¶

Filtering¶

• JSON policies on a subscriber
• will only receive msg which match the filter
• can be used with fan out to split SNS messages to multiple dedicated docs/messaging/SQS queues

Patterns¶

• SNS + SQS

• S3 Events to multiple queues

• SNS → Kinesis → S3

• SNS FIFO → SQS FIFO

• SNS Message Filtering → SQS Queue