typhoon/google-cloud/container-linux/kubernetes/network.tf

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resource "google_compute_network" "network" {
name = "${var.cluster_name}"
description = "Network for the ${var.cluster_name} cluster"
auto_create_subnetworks = true
}
resource "google_compute_firewall" "allow-ssh" {
name = "${var.cluster_name}-allow-ssh"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [22]
}
source_ranges = ["0.0.0.0/0"]
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target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}
resource "google_compute_firewall" "allow-apiserver" {
name = "${var.cluster_name}-allow-apiserver"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [443]
}
source_ranges = ["0.0.0.0/0"]
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target_tags = ["${var.cluster_name}-controller"]
}
resource "google_compute_firewall" "allow-ingress" {
name = "${var.cluster_name}-allow-ingress"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [80, 443]
}
source_ranges = ["0.0.0.0/0"]
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target_tags = ["${var.cluster_name}-worker"]
}
resource "google_compute_firewall" "internal-etcd" {
name = "${var.cluster_name}-internal-etcd"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [2380]
}
source_tags = ["${var.cluster_name}-controller"]
target_tags = ["${var.cluster_name}-controller"]
}
# Allow Prometheus to scrape etcd metrics
resource "google_compute_firewall" "internal-etcd-metrics" {
name = "${var.cluster_name}-internal-etcd-metrics"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [2381]
}
source_tags = ["${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller"]
}
# Calico BGP and IPIP
# https://docs.projectcalico.org/v2.5/reference/public-cloud/gce
resource "google_compute_firewall" "internal-calico" {
count = "${var.networking == "calico" ? 1 : 0}"
name = "${var.cluster_name}-internal-calico"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = ["179"]
}
allow {
protocol = "ipip"
}
source_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}
# flannel
resource "google_compute_firewall" "internal-flannel" {
count = "${var.networking == "flannel" ? 1 : 0}"
name = "${var.cluster_name}-internal-flannel"
network = "${google_compute_network.network.name}"
allow {
protocol = "udp"
ports = [8472]
}
source_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}
# Allow Prometheus to scrape node-exporter daemonset
resource "google_compute_firewall" "internal-node-exporter" {
name = "${var.cluster_name}-internal-node-exporter"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [9100]
}
source_tags = ["${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}
# kubelet API to allow apiserver exec and log or metrics scraping
resource "google_compute_firewall" "internal-kubelet" {
name = "${var.cluster_name}-internal-kubelet"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [10250]
}
source_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}
resource "google_compute_firewall" "internal-kubelet-readonly" {
name = "${var.cluster_name}-internal-kubelet-readonly"
network = "${google_compute_network.network.name}"
allow {
protocol = "tcp"
ports = [10255]
}
source_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
target_tags = ["${var.cluster_name}-controller", "${var.cluster_name}-worker"]
}