Aws - Load Balancer (Elastic load balancing)

Target group

A target group allows AWS resources to register themselves as targets for requests that the load balancer receives to forward.

For instance, service containers can automatically register to a target group so that they can receive traffic from the network load balancer when they are provisioned.

create-load-balancer

• input: subnet and name

aws elbv2 create-load-balancer ^
  --name mysfits-nlb ^
  --scheme internet-facing ^
  --type network ^
  --subnets REPLACE_ME_PUBLIC_SUBNET_ONE REPLACE_ME_PUBLIC_SUBNET_TWO ^
> %HOME%/environment/nlb-output.json

You get in the ouput:

• a DNSName,
• a VpcId,
• and a LoadBalancerArn

create-target-group

The VpcId to replace can be found when the load balancer was created. You get back a TargetGroupArn.

aws elbv2 create-target-group ^
   --name MythicalMysfits-TargetGroup ^
   --port 8080 ^
   --protocol TCP ^
   --target-type ip ^
   --vpc-id REPLACE_ME_VPC_ID ^
   --health-check-interval-seconds 10 ^
   --health-check-path / ^
   --health-check-protocol HTTP ^
   --healthy-threshold-count 3 ^
   --unhealthy-threshold-count 3 ^
> %HOME%/environment/target-group-output.json