kjuulh/terraform-hcloud-kube-hetzner
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First control plane node is not special anymore

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The first control plane node is now identical to any other server
node. The cluster initialization happens once in two steps: first,
make sure that the k3s cluster is initialized and then apply our
configurations while the other nodes join. This change makes the
initialization more resilient and even faster than before.
This commit is contained in:
Marco Nenciarini
2022-02-22 08:50:54 +01:00
parent 116f13f6f2
commit 0c3aa36c03
7 changed files with 40 additions and 52 deletions
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16
servers.tf
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@@ -1,8 +1,8 @@
module "control_planes" {
source = "./modules/host"
count = var.servers_num - 1
name = "k3s-control-plane-${count.index + 1}"
count = var.servers_num
name = "k3s-control-plane-${count.index}"
ssh_keys = [hcloud_ssh_key.k3s.id]
public_key = var.public_key
@@ -12,7 +12,7 @@ module "control_planes" {
placement_group_id = hcloud_placement_group.k3s.id
location = var.location
network_id = hcloud_network.k3s.id
ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 258 + count.index)
ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 257 + count.index)
server_type = var.control_plane_server_type
labels = {
@@ -24,7 +24,7 @@ module "control_planes" {
}
resource "null_resource" "control_planes" {
count = var.servers_num - 1
count = var.servers_num
triggers = {
control_plane_id = module.control_planes[count.index].id
@@ -41,16 +41,16 @@ resource "null_resource" "control_planes" {
provisioner "file" {
content = yamlencode({
node-name = module.control_planes[count.index].name
server = "https://${local.first_control_plane_network_ip}:6443"
server = "https://${element(module.control_planes.*.private_ipv4_address, count.index > 0 ? 0 : 1)}:6443"
token = random_password.k3s_token.result
cluster-init = true
disable-cloud-controller = true
disable = ["servicelb", "local-storage"]
flannel-iface = "eth1"
kubelet-arg = "cloud-provider=external"
node-ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 258 + count.index)
advertise-address = cidrhost(hcloud_network_subnet.k3s.ip_range, 258 + count.index)
tls-san = cidrhost(hcloud_network_subnet.k3s.ip_range, 258 + count.index)
node-ip = module.control_planes[count.index].private_ipv4_address
advertise-address = module.control_planes[count.index].private_ipv4_address
tls-san = 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"] : []
})