how to create application load balancer in aws using terraform

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create AWS application load balancer using terraform

To create an Application Load Balancer using Terraform, you will need to use the aws_alb resource. Here is an example of how you can create an Application Load Balancer using Terraform:

resource "aws_alb" "sample" {
  name            = "sample-alb"
  internal        = false
  security_groups = [aws_security_group.alb.id]
  subnets         = aws_subnet.alb_subnets.*.id

  idle_timeout               = 60
  enable_deletion_protection = false

  tags = {
    Name = "sample-alb"
  }
}

This will create an Application Load Balancer with the specified name, security groups, and subnets. You can then add listeners and target groups to the load balancer using the aws_alb_listener and aws_alb_target_group resources.

Here is an example of how you can create a listener and target group for the load balancer:

resource "aws_alb_listener" "sample" {
  load_balancer_arn = aws_alb.sample.arn
  port              = 80
  protocol          = "HTTP"

  default_action {
    type = "forward"

    target_group_arn = aws_alb_target_group.sample.arn
  }
}

resource "aws_alb_target_group" "sample" {
  name     = "sample-target-group"
  port     = 80
  protocol = "HTTP"

  health_check {
    path                = "/health"
    interval            = 30
    timeout             = 5
    healthy_threshold   = 2
    unhealthy_threshold = 2
  }
}

This will create a listener on port 80 that forwards traffic to the target group on port 80. The target group will have a health check configured to check the /health endpoint on the targets with a 30 second interval and a 5 second timeout.

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