AWS::GlobalAccelerator::Listener

The AWS::GlobalAccelerator::Listener resource is a Global Accelerator resource type that contains information about how you create a listener to process inbound connections from clients to an accelerator. Connections arrive to assigned static IP addresses on a port, port range, or list of port ranges that you specify.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "Type" : "AWS::GlobalAccelerator::Listener",
  "Properties" : {
      "AcceleratorArn" : String,
      "ClientAffinity" : String,
      "PortRanges" : [ PortRange, ... ],
      "Protocol" : String
    }
}

YAML

Type: AWS::GlobalAccelerator::Listener
Properties:
  AcceleratorArn: String
  ClientAffinity: String
  PortRanges: 
    - PortRange
  Protocol: String

Properties

AcceleratorArn

The Amazon Resource Name (ARN) of your accelerator.

Required: Yes

Type: String

Maximum: 255

Update requires: Replacement

ClientAffinity

Client affinity lets you direct all requests from a user to the same endpoint, if you have stateful applications, regardless of the port and protocol of the client request. Client affinity gives you control over whether to always route each client to the same specific endpoint.

AWS Global Accelerator uses a consistent-flow hashing algorithm to choose the optimal endpoint for a connection. If client affinity is NONE, Global Accelerator uses the "five-tuple" (5-tuple) properties—source IP address, source port, destination IP address, destination port, and protocol—to select the hash value, and then chooses the best endpoint. However, with this setting, if someone uses different ports to connect to Global Accelerator, their connections might not be always routed to the same endpoint because the hash value changes.

If you want a given client to always be routed to the same endpoint, set client affinity to SOURCE_IP instead. When you use the SOURCE_IP setting, Global Accelerator uses the "two-tuple" (2-tuple) properties— source (client) IP address and destination IP address—to select the hash value.

The default value is NONE.

Required: No

Type: String

Allowed values: NONE | SOURCE_IP

Update requires: No interruption

PortRanges

The list of port ranges for the connections from clients to the accelerator.

Required: Yes

Type: Array of PortRange

Minimum: 1

Maximum: 10

Update requires: No interruption

Protocol

The protocol for the connections from clients to the accelerator.

Required: Yes

Type: String

Allowed values: TCP | UDP

Update requires: No interruption

Return values

Ref

When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the ARN of the listener, such as arn:aws:globalaccelerator::012345678901:accelerator/1234abcd-abcd-1234-abcd-1234abcdefgh/listener/0123vxyz.

For more information about using the Ref function, see Ref.

Fn::GetAtt

The Fn::GetAtt intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.

For more information about using the Fn::GetAtt intrinsic function, see Fn::GetAtt.

ListenerArn

The ARN of the listener, such as arn:aws:globalaccelerator::012345678901:accelerator/1234abcd-abcd-1234-abcd-1234abcdefgh/listener/0123vxyz.

Examples

Add a listener

These are examples to specify a listener.

JSON

"Resources": {
    "Listener": {
        "Type": "AWS::GlobalAccelerator::Listener",
        "Properties": {
            "AcceleratorArn": {
                "Ref": "Accelerator"
            },
            "Protocol": "TCP",
            "PortRanges": [
                {
                    "FromPort": 80,
                    "ToPort": 80
                }
            ]
        }
    }
}

YAML

Listener:
  Type: AWS::GlobalAccelerator::Listener
  Properties:
    AcceleratorArn:
      Ref: Accelerator
    Protocol: TCP
    PortRanges:
    - FromPort: 80
      ToPort: 80