Terraform AWS Security Group self reference

Question

I'm using AWS resource using terraform and here is the Security Group:

ingress {

          from_port = 0

          to_port = 0

          protocol = -1

          self = true

      }

But now how to add different Protocols, what is the terraform syntax to do that?

Answer 1

You may implement a self-referential group by splitting the 'sec group' from rules using the resources 'aws_security_group' and 'aws_security_group_rule'

And your terraform code will look like this:

resource "aws_security_group" "sec_group" {

  name   = "sec_group"

  vpc_id = "${local.vpc_id}"

}

resource "aws_security_group_rule" "sec_group_allow_tcp" {

  type              = "ingress"

  from_port         = 0 // first part of port range 

  to_port           = 65535 // second part of port range

  protocol          = "tcp" // Protocol, could be "tcp" "udp" etc. 

  security_group_id = "${aws_security_group.sec_group.id}" // Which group to attach it to

  source_security_group_id = "${aws_security_group.sec_group.id}" // Which group to specify as source

}

resource "aws_security_group_rule" "sec_group_allow_udp" {

  type              = "ingress"

  from_port         = 0 // first part of port range 

  to_port           = 65535 // second part of port range

  protocol          = "udp" // Protocol, could be "tcp" "udp" etc. 

  security_group_id = "${aws_security_group.sec_group.id}" // Which group to attach it to

  source_security_group_id = "${aws_security_group.sec_group.id}" // Which group to specify as source

}

resource "aws_security_group_rule" "sec_group_allow_1865" {

  type              = "ingress"

  from_port         = 1865 // first part of port range 

  to_port           = 1865 // second part of port range

  protocol          = "tcp" // Protocol, could be "tcp" "udp" etc. 

  security_group_id = "${aws_security_group.sec_group.id}" // Which group to attach it to

  source_security_group_id = "${aws_security_group.sec_group.id}" // Which group to specify as source

}

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