kjuulh/terraform-hcloud-kube-hetzner
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add specific subnet for nodepool

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This commit is contained in:
jodhi 2022-02-26 01:16:38 +07:00
parent b5039e2bc1
commit c9101824fc
10 changed files with 62 additions and 31 deletions
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10
agents.tf
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@ -11,15 +11,19 @@ module "agents" {
firewall_ids = [hcloud_firewall.k3s.id]
placement_group_id = hcloud_placement_group.k3s.id
location = var.location
network_id = hcloud_network.k3s.id
server_type = each.value.server_type
subnet_id = hcloud_network_subnet.subnet[each.value.subnet].id
private_ip = cidrhost(var.network_subnets[each.value.subnet], each.value.index + 1)
labels = {
"provisioner" = "terraform",
"engine" = "k3s"
}
hcloud_token = var.hcloud_token
depends_on = [
hcloud_network_subnet.subnet
]
}
resource "null_resource" "agents" {
@ -73,6 +77,6 @@ resource "null_resource" "agents" {
depends_on = [
null_resource.first_control_plane,
hcloud_network_subnet.k3s
hcloud_network_subnet.subnet
]
}

2
init.tf
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@ -58,7 +58,7 @@ resource "null_resource" "first_control_plane" {
}
depends_on = [
hcloud_network_subnet.k3s
hcloud_network_subnet.subnet["control_plane"]
]
}

6
locals.tf
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@ -33,9 +33,11 @@ locals {
agent_nodepools = merge([
for nodepool_name, nodepool_obj in var.agent_nodepools : {
for index in range(lookup(nodepool_obj, "count", var.agents_num)) :
for index in range(nodepool_obj.count) :
format("%s-%s", nodepool_name, index) => {
server_type : nodepool_obj.server_type
server_type : nodepool_obj.server_type,
subnet : lookup(nodepool_obj, "subnet", "default"),
index : index
}
}
]...)

13
main.tf
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@ -10,14 +10,15 @@ resource "hcloud_ssh_key" "k3s" {
resource "hcloud_network" "k3s" {
name = "k3s"
ip_range = "10.0.0.0/8"
ip_range = var.network_ip_range
}
resource "hcloud_network_subnet" "k3s" {
resource "hcloud_network_subnet" "subnet" {
for_each = var.network_subnets
network_id = hcloud_network.k3s.id
type = "cloud"
network_zone = var.network_region
ip_range = "10.0.0.0/16"
ip_range = each.value
}
resource "hcloud_firewall" "k3s" {
@ -29,8 +30,8 @@ resource "hcloud_firewall" "k3s" {
protocol = "tcp"
port = "any"
source_ips = [
var.network_ip_range,
"127.0.0.1/32",
"10.0.0.0/8",
"169.254.169.254/32",
"213.239.246.1/32"
]
@ -40,8 +41,8 @@ resource "hcloud_firewall" "k3s" {
protocol = "udp"
port = "any"
source_ips = [
var.network_ip_range,
"127.0.0.1/32",
"10.0.0.0/8",
"169.254.169.254/32",
"213.239.246.1/32"
]
@ -50,8 +51,8 @@ resource "hcloud_firewall" "k3s" {
direction = "in"
protocol = "icmp"
source_ips = [
var.network_ip_range,
"127.0.0.1/32",
"10.0.0.0/8",
"169.254.169.254/32",
"213.239.246.1/32"
]

5
modules/host/main.tf
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@ -65,6 +65,7 @@ resource "hcloud_server" "server" {
}
resource "hcloud_server_network" "server" {
server_id = hcloud_server.server.id
network_id = var.network_id
ip = var.private_ip
server_id = hcloud_server.server.id
subnet_id = var.subnet_id
}

11
modules/host/variables.tf
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@ -54,9 +54,14 @@ variable "location" {
type = string
}
variable "network_id" {
description = "The network or subnet id"
type = number
variable "subnet_id" {
description = "The subnet id"
type = string
}
variable "private_ip" {
description = "Private IP for the server"
type = string
}
variable "server_type" {

9
servers.tf
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@ -11,8 +11,9 @@ module "control_planes" {
firewall_ids = [hcloud_firewall.k3s.id]
placement_group_id = hcloud_placement_group.k3s.id
location = var.location
network_id = hcloud_network.k3s.id
server_type = var.control_plane_server_type
subnet_id = hcloud_network_subnet.subnet["control_plane"].id
private_ip = cidrhost(var.network_subnets["control_plane"], count.index + 1)
labels = {
"provisioner" = "terraform",
@ -20,6 +21,10 @@ module "control_planes" {
}
hcloud_token = var.hcloud_token
depends_on = [
hcloud_network_subnet.subnet
]
}
resource "null_resource" "control_planes" {
@ -78,6 +83,6 @@ resource "null_resource" "control_planes" {
depends_on = [
null_resource.first_control_plane,
hcloud_network_subnet.k3s
hcloud_network_subnet.subnet
]
}

20
terraform.tfvars.example
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@ -7,24 +7,32 @@ private_key = "/home/username/.ssh/id_ed25519"
# These can be customized, or left with the default values
# For Hetzner locations see https://docs.hetzner.com/general/others/data-centers-and-connection/
# For Hetzner server types see https://www.hetzner.com/cloud
location = "fsn1" # change to `ash` for us-east Ashburn, Virginia location
network_region = "eu-central" # change to `us-east` if location is ash
location = "fsn1" # change to `ash` for us-east Ashburn, Virginia location
network_region = "eu-central" # change to `us-east` if location is ash
network_ip_range = "10.0.0.0/8"
network_subnets = {
control_plane = "10.1.0.0/16"
subnet1 = "10.2.0.0/16"
subnet2 = "10.3.0.0/16"
}
control_plane_server_type = "cpx11"
lb_server_type = "lb11"
# At least 3 server nodes is recommended for HA, otherwise you need to turn off automatic upgrade (see ReadMe).
servers_num = 3
servers_num = 3
# For agent nodes, at least 2 is recommended for HA, but you can keep automatic upgrades.
agents_num = 2
agent_nodepools = {
big = {
server_type = "cpx31",
count = 1
count = 1,
subnet = "subnet1",
}
small = {
server_type = "cpx21",
count = 2,
subnet = "subnet2",
}
}

15
variables.tf
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@ -30,6 +30,16 @@ variable "network_region" {
type = string
}
variable "network_ip_range" {
description = "Default IP range for network"
type = string
}
variable "network_subnets" {
description = "Subnets definition for default network"
type = map(string)
}
variable "control_plane_server_type" {
description = "Default control plane server type"
type = string
@ -52,11 +62,6 @@ variable "servers_num" {
type = number
}
variable "agents_num" {
description = "Number of agent nodes."
type = number
}
variable "agent_nodepools" {
description = "Number of agent nodes."
type = map(any)