AWS Error : None of these Availability Zones contains a healthy target. Requests are being routed to all targets. in AWS

Question

I have created a Application Load Balance in Aws. I have created 2 EC2 and make them a group. After that I add that group to the ALB with listener 80.

But when the syste

Answer 1

Check if your heath check parameters in target group is properly configured

protocol and port should be pointing to something where response header return 200 ok

screenshot target group settings

also, check if you EC2 heath check is ok or not and the Subnet you added to Alb should have at least 1 Ec2 running any of those subnets,

check the security group also should allow ALB to look for EC2

AwS link 3: https://i.stack.imgur.com/TEOnU.gif]2

AWS Link 4