Service load balancing

Your Amazon ECS service can optionally be configured to use Elastic Load Balancing to distribute traffic evenly across the tasks in your service.

Note

When you use tasks sets, all the tasks in the set must all be configured to use Elastic Load Balancing or to not use Elastic Load Balancing.

Amazon ECS services hosted on AWS Fargate support the Application Load Balancer and Network Load Balancer load balancer types. Application Load Balancers are used to route HTTP/HTTPS (or layer 7) traffic. Network Load Balancers are used to route TCP or UDP (or layer 4) traffic. For more information, see Load balancer types.

Application Load Balancers offer several features that make them attractive for use with Amazon ECS services:

• Each service can serve traffic from multiple load balancers and expose multiple load balanced ports by specifying multiple target groups.

• Application Load Balancers allow containers to use dynamic host port mapping (so that multiple tasks from the same service are allowed per container instance).

• Application Load Balancers support path-based routing and priority rules (so that multiple services can use the same listener port on a single Application Load Balancer).

With your load balancer, you pay only for what you use. For more information, see Elastic Load Balancing pricing.

Topics

• Load balancer types
• Creating a load balancer
• Registering multiple target groups with a service