Feature request: Support weight in forward action

[siutsin]

Is your request related to a new offering from AWS?

No

Is your request related to a problem? Please describe.

I am looking for a weighted forward action described at lb_listener_rule. However, it seems it is not currently supported in this module.

Describe the solution you'd like.

Support the syntax described in lb_listener_rule. E.g.

resource "aws_lb_listener_rule" "host_based_routing" {
  listener_arn = aws_lb_listener.front_end.arn
  priority     = 99

  action {
    type = "forward"
    forward {
      target_group {
        arn    = aws_lb_target_group.main.arn
        weight = 80
      }

      target_group {
        arn    = aws_lb_target_group.canary.arn
        weight = 20
      }

      stickiness {
        enabled  = true
        duration = 600
      }
    }
  }

  condition {
    host_header {
      values = ["my-service.*.terraform.io"]
    }
  }
}

Describe alternatives you've considered.

Additional context

[alexbricepalo]

+1 for this feature

[antonbabenko]

Pull request is welcome.

[alexbricepalo]

Pull request is welcome.

Yup, I was just looking into doing that.

[alexbricepalo]

Pull request: #224

[github-actions]

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