Question: Why is this ingress rule?

[ppwfx]

Hey,

what's the purpose of this ingress rule?

ingress { from_port = 0 to_port = 65535 protocol = "UDP" self = true }

[gyulavoros]

Can't remember exactly but basically, it enables UDP traffic inside the security group. self = true is important, it tells Terraform to use the security group as the source (https://www.terraform.io/docs/providers/aws/r/security_group.html#self).

Please note, that the project is a bit outdated, it's still using an ancient 1.1x version of Kubernetes.