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security_group.tf
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# Control Plane
resource "aws_security_group" "control_plane" {
name = "${title(var.cluster_name)}_Control_Plane"
description = "The security group of the cluster control plane."
vpc_id = "${data.aws_vpc.selected.id}"
egress {
from_port = 0
to_port = 65535
description = "Allow the cluster control plane to communicate with worker nodes."
protocol = "tcp"
security_groups = ["${aws_security_group.worker_nodes.id}"]
}
tags = "${merge(
local.common_tags,
map()
)}"
}
resource "aws_security_group_rule" "control_plane_ingress_443" {
type = "ingress"
security_group_id = "${aws_security_group.control_plane.id}"
description = "Allow pods to communicate with the cluster API Server."
source_security_group_id = "${aws_security_group.worker_nodes.id}"
protocol = "tcp"
from_port = 443
to_port = 443
}
# Worker Nodes
resource "aws_security_group" "worker_nodes" {
name = "${title(var.cluster_name)}_Worker_Nodes"
description = "The security group for the ${var.cluster_name} worker node group."
vpc_id = "${data.aws_vpc.selected.id}"
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
tags = "${merge(
local.common_tags,
map()
)}"
}
resource "aws_security_group_rule" "worker_nodes_ingress_each_other" {
type = "ingress"
security_group_id = "${aws_security_group.worker_nodes.id}"
description = "Allow node to communicate with each other."
source_security_group_id = "${aws_security_group.worker_nodes.id}"
protocol = "-1"
from_port = 0
to_port = 0
}
resource "aws_security_group_rule" "control_plane_to_worker_nodes" {
type = "ingress"
security_group_id = "${aws_security_group.worker_nodes.id}"
description = "Allow worker Kubelets and pods to receive communication from the cluster control plane."
source_security_group_id = "${aws_security_group.control_plane.id}"
protocol = "tcp"
from_port = 1025
to_port = 65535
}
resource "aws_security_group_rule" "worker_nodes_ingress_alb" {
type = "ingress"
security_group_id = "${aws_security_group.worker_nodes.id}"
description = "Allow the worker pods to receive communication from ALB."
source_security_group_id = "${aws_security_group.alb.id}"
protocol = "tcp"
from_port = 31380
to_port = 31400
}
# ALB
resource "aws_security_group" "alb" {
name = "${title(var.cluster_name)}_ALB"
description = "The security group for the ${var.cluster_name} ALB."
vpc_id = "${data.aws_vpc.selected.id}"
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
tags = "${merge(
local.common_tags,
map()
)}"
}
resource "aws_security_group_rule" "alb_http" {
type = "ingress"
security_group_id = "${aws_security_group.alb.id}"
description = "Allow http request."
protocol = "tcp"
from_port = 80
to_port = 80
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
resource "aws_security_group_rule" "alb_ssl" {
type = "ingress"
security_group_id = "${aws_security_group.alb.id}"
description = "Allow https request."
protocol = "tcp"
from_port = 443
to_port = 443
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}