@aws-cdk/aws-elasticloadbalancing

The CDK Construct Library for AWS::ElasticLoadBalancing

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7,0472,046Jul 27, 2021Oct 4, 2017Minified + gzip package size for @aws-cdk/aws-elasticloadbalancing in KB

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Amazon Elastic Load Balancing Construct Library


cfn-resources: Stable

cdk-constructs: Stable


The @aws-cdk/aws-elasticloadbalancing package provides constructs for configuring classic load balancers.

Configuring a Load Balancer

Load balancers send traffic to one or more AutoScalingGroups. Create a load balancer, set up listeners and a health check, and supply the fleet(s) you want to load balance to in the targets property.

const lb = new elb.LoadBalancer(this, 'LB', {
    vpc,
    internetFacing: true,
    healthCheck: {
        port: 80
    },
});

lb.addTarget(myAutoScalingGroup);
lb.addListener({
    externalPort: 80,
});

The load balancer allows all connections by default. If you want to change that, pass the allowConnectionsFrom property while setting up the listener:

lb.addListener({
    externalPort: 80,
    allowConnectionsFrom: [mySecurityGroup]
});

If you find any bugs or have a feature request, please open an issue on github!

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