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

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# Managed instance group of workers
resource "google_compute_region_instance_group_manager" "workers" {
name = "${var.name}-worker-group"
description = "Compute instance group of ${var.name} workers"
# instance name prefix for instances in the group
base_instance_name = "${var.name}-worker"
instance_template = google_compute_instance_template.worker.self_link
region = var.region
target_size = var.worker_count
target_pools = [google_compute_target_pool.workers.self_link]
named_port {
name = "http"
port = "80"
}
named_port {
name = "https"
port = "443"
}
}
# Worker instance template
resource "google_compute_instance_template" "worker" {
name_prefix = "${var.name}-worker-"
description = "Worker Instance template"
machine_type = var.machine_type
metadata = {
user-data = data.ct_config.worker-ignition.rendered
}
scheduling {
automatic_restart = var.preemptible ? false : true
preemptible = var.preemptible
}
disk {
auto_delete = true
boot = true
source_image = var.os_image
disk_size_gb = var.disk_size
}
network_interface {
network = var.network
# Ephemeral external IP
access_config {
}
}
can_ip_forward = true
tags = ["worker", "${var.cluster_name}-worker", "${var.name}-worker"]
guest_accelerator {
count = var.accelerator_count
type = var.accelerator_type
}
lifecycle {
# To update an Instance Template, Terraform should replace the existing resource
create_before_destroy = true
}
}
# Worker Ignition config
data "ct_config" "worker-ignition" {
content = data.template_file.worker-config.rendered
pretty_print = false
snippets = var.clc_snippets
}
# Worker Container Linux config
data "template_file" "worker-config" {
template = file("${path.module}/cl/worker.yaml.tmpl")
vars = {
kubeconfig = indent(10, var.kubeconfig)
ssh_authorized_key = var.ssh_authorized_key
cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
cluster_domain_suffix = var.cluster_domain_suffix
node_labels = join(",", var.node_labels)
}
}