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security.tf
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# Security Groups (instance firewalls)
# Controller security group
resource "aws_security_group" "controller" {
name = "${var.cluster_name}-controller"
description = "${var.cluster_name} controller security group"
vpc_id = aws_vpc.network.id
tags = {
"Name" = "${var.cluster_name}-controller"
}
}
resource "aws_security_group_rule" "controller-icmp" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-icmp-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-ssh" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 22
to_port = 22
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "controller-etcd" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 2379
to_port = 2380
self = true
}
# Allow Prometheus to scrape etcd metrics
resource "aws_security_group_rule" "controller-etcd-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 2381
to_port = 2381
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-cilium-health" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-cilium-health-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
self = true
}
# IANA VXLAN default
resource "aws_security_group_rule" "controller-vxlan" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-vxlan-self" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
self = true
}
resource "aws_security_group_rule" "controller-apiserver" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 6443
to_port = 6443
cidr_blocks = ["0.0.0.0/0"]
}
# Linux VXLAN default
resource "aws_security_group_rule" "controller-linux-vxlan" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-linux-vxlan-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
self = true
}
# Allow Prometheus to scrape node-exporter daemonset
resource "aws_security_group_rule" "controller-node-exporter" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 9100
to_port = 9100
source_security_group_id = aws_security_group.worker.id
}
# Allow Prometheus to scrape kube-proxy
resource "aws_security_group_rule" "kube-proxy-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10249
to_port = 10249
source_security_group_id = aws_security_group.worker.id
}
# Allow apiserver to access kubelets for exec, log, port-forward
resource "aws_security_group_rule" "controller-kubelet" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-kubelet-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
self = true
}
# Allow Prometheus to scrape kube-scheduler
resource "aws_security_group_rule" "controller-scheduler-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10251
to_port = 10251
source_security_group_id = aws_security_group.worker.id
}
# Allow Prometheus to scrape kube-controller-manager
resource "aws_security_group_rule" "controller-manager-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10252
to_port = 10252
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-bgp" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-bgp-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
self = true
}
resource "aws_security_group_rule" "controller-ipip" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-ipip-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-ipip-legacy" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-ipip-legacy-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-egress" {
security_group_id = aws_security_group.controller.id
type = "egress"
protocol = "-1"
from_port = 0
to_port = 0
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
# Worker security group
resource "aws_security_group" "worker" {
name = "${var.cluster_name}-worker"
description = "${var.cluster_name} worker security group"
vpc_id = aws_vpc.network.id
tags = {
"Name" = "${var.cluster_name}-worker"
}
}
resource "aws_security_group_rule" "worker-icmp" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-icmp-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-ssh" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 22
to_port = 22
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-http" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 80
to_port = 80
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-https" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 443
to_port = 443
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-cilium-health" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-cilium-health-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
self = true
}
# IANA VXLAN default
resource "aws_security_group_rule" "worker-vxlan" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-vxlan-self" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
self = true
}
# Linux VXLAN default
resource "aws_security_group_rule" "worker-linux-vxlan" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-linux-vxlan-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
self = true
}
# Allow Prometheus to scrape node-exporter daemonset
resource "aws_security_group_rule" "worker-node-exporter" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 9100
to_port = 9100
self = true
}
# Allow Prometheus to scrape kube-proxy
resource "aws_security_group_rule" "worker-kube-proxy" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10249
to_port = 10249
self = true
}
# Allow apiserver to access kubelets for exec, log, port-forward
resource "aws_security_group_rule" "worker-kubelet" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
source_security_group_id = aws_security_group.controller.id
}
# Allow Prometheus to scrape kubelet metrics
resource "aws_security_group_rule" "worker-kubelet-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
self = true
}
resource "aws_security_group_rule" "ingress-health" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10254
to_port = 10254
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-bgp" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-bgp-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
self = true
}
resource "aws_security_group_rule" "worker-ipip" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-ipip-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-ipip-legacy" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-ipip-legacy-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-egress" {
security_group_id = aws_security_group.worker.id
type = "egress"
protocol = "-1"
from_port = 0
to_port = 0
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}