ALB is a layer7 load balancer on AWS. It offers more features than ELB. You can find out more about it on https://aws.amazon.com/elasticloadbalancing/applicationloadbalancer/ Recently, I was asked to look into a random 504 issue with ELB. Because there is not a lot to configure on ELB and it’s pretty much a black box, I wasn’t making any headway there. The client believes their code is solid and this is an…
