terraform-hcloud-kube-hetzner/control_planes.tf
2022-03-12 13:30:12 +01:00

88 lines
3.0 KiB
HCL

module "control_planes" {
source = "./modules/host"
count = var.control_plane_count
name = "${var.use_cluster_name_in_node_name ? "${var.cluster_name}-" : ""}control-plane"
ssh_keys = [hcloud_ssh_key.k3s.id]
public_key = var.public_key
private_key = var.private_key
additional_public_keys = var.additional_public_keys
firewall_ids = [hcloud_firewall.k3s.id]
placement_group_id = hcloud_placement_group.k3s.id
location = var.location
server_type = var.control_plane_server_type
ipv4_subnet_id = hcloud_network_subnet.subnet[1].id
# We leave some room so 100 eventual Hetzner LBs that can be created perfectly safely
# It leaves the subnet with 254 x 254 - 100 = 64416 IPs to use, so probably enough.
private_ipv4 = cidrhost(local.network_ipv4_subnets[1], count.index + 101)
labels = {
"provisioner" = "terraform",
"engine" = "k3s"
}
depends_on = [
hcloud_network_subnet.subnet
]
}
resource "null_resource" "control_planes" {
count = var.control_plane_count
triggers = {
control_plane_id = module.control_planes[count.index].id
}
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = module.control_planes[count.index].ipv4_address
}
# Generating k3s server config file
provisioner "file" {
content = yamlencode({
node-name = module.control_planes[count.index].name
server = "https://${element(module.control_planes.*.private_ipv4_address, count.index > 0 ? 0 : 1)}:6443"
token = random_password.k3s_token.result
disable-cloud-controller = true
disable = ["servicelb", "local-storage", "traefik", "metric-server"]
flannel-iface = "eth1"
kubelet-arg = "cloud-provider=external"
node-ip = module.control_planes[count.index].private_ipv4_address
advertise-address = module.control_planes[count.index].private_ipv4_address
node-taint = var.allow_scheduling_on_control_plane ? [] : ["node-role.kubernetes.io/master:NoSchedule"]
node-label = var.automatically_upgrade_k3s ? ["k3s_upgrade=true"] : []
})
destination = "/tmp/config.yaml"
}
# Install k3s server
provisioner "remote-exec" {
inline = local.install_k3s_server
}
# Start the k3s server and wait for it to have started correctly
provisioner "remote-exec" {
inline = [
"systemctl start k3s 2> /dev/null",
<<-EOT
timeout 120 bash <<EOF
until systemctl status k3s > /dev/null; do
systemctl start k3s 2> /dev/null
echo "Waiting for the k3s server to start..."
sleep 2
done
EOF
EOT
]
}
depends_on = [
null_resource.first_control_plane,
hcloud_network_subnet.subnet
]
}