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main.tf
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/*
Copyright 2022 The KubeOne Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
# ======================================================================================================================
# Configure the VMware Cloud Director Provider
provider "vcd" {
/*
See https://registry.terraform.io/providers/vmware/vcd/latest/docs#argument-reference
for config options reference
*/
url = var.vcd_url
auth_type = "integrated"
user = var.vcd_user
password = var.vcd_password
org = var.vcd_org
vdc = var.vcd_vdc
allow_unverified_ssl = var.vcd_allow_insecure
max_retry_timeout = 120
logging = var.vcd_logging_enabled
}
locals {
external_network_name = var.external_network_name == "" ? element([for net in data.vcd_edgegateway.edge_gateway.external_network : net.name if tolist(net.subnet)[0].use_for_default_route], 0) : var.external_network_name
external_network_ip = var.external_network_ip == "" ? data.vcd_edgegateway.edge_gateway.default_external_network_ip : var.external_network_ip
cluster_autoscaler_min_replicas = var.cluster_autoscaler_min_replicas > 0 ? var.cluster_autoscaler_min_replicas : var.initial_machinedeployment_replicas
cluster_autoscaler_max_replicas = var.cluster_autoscaler_max_replicas > 0 ? var.cluster_autoscaler_max_replicas : var.initial_machinedeployment_replicas
}
# ======================================================================================================================
# Existing edge gateway in VDC
data "vcd_edgegateway" "edge_gateway" {
name = var.vcd_edge_gateway_name
}
# Edge gateway settings
resource "vcd_edgegateway_settings" "edge_gateway" {
edge_gateway_id = data.vcd_edgegateway.edge_gateway.id
lb_enabled = true
lb_acceleration_enabled = true
lb_logging_enabled = false
fw_enabled = true
fw_default_rule_logging_enabled = false
}
# ======================================================================================================================
# Routed network that will be connected to the edge gateway
resource "vcd_network_routed" "network" {
name = "${var.cluster_name}-routed-network"
description = "Routed network for ${var.cluster_name} vApp"
edge_gateway = data.vcd_edgegateway.edge_gateway.name
interface_type = var.network_interface_type
gateway = var.gateway_ip
dhcp_pool {
start_address = var.dhcp_start_address
end_address = var.dhcp_end_address
}
dns1 = var.network_dns_server_1
dns2 = var.network_dns_server_2
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# ======================================================================================================================
# Dedicated vApp for cluster resources; vms, disks, network, etc.
resource "vcd_vapp" "cluster" {
name = var.cluster_name
description = "vApp for ${var.vcd_vdc} cluster"
metadata_entry {
key = "provisioner"
value = "KubeOne"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "cluster_name"
value = var.cluster_name
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "type"
value = "Kubernetes Cluster"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
depends_on = [vcd_network_routed.network]
}
# Connect the dedicated routed network to vApp
resource "vcd_vapp_org_network" "network" {
vapp_name = var.cluster_name
org_network_name = vcd_network_routed.network.name
depends_on = [vcd_vapp.cluster, vcd_network_routed.network]
}
# ======================================================================================================================
# OS image catalog
resource "vcd_catalog" "catalog" {
name = var.catalog_name
delete_recursive = "true"
delete_force = "true"
depends_on = [vcd_vapp.cluster]
}
# upload OS image
resource "vcd_catalog_vapp_template" "vapp_template" {
catalog_id = vcd_catalog.catalog.id
name = var.template_name
ovf_url = var.os_image_url
upload_piece_size = 10
}
# ======================================================================================================================
# Create VMs for bastion host
resource "vcd_vapp_vm" "bastion" {
vapp_name = vcd_vapp.cluster.name
name = "${var.cluster_name}-bastion"
computer_name = "${var.cluster_name}-bastion"
metadata_entry {
key = "provisioner"
value = "KubeOne"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "cluster_name"
value = var.cluster_name
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "role"
value = "bastion"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
guest_properties = {
"instance-id" = "${var.cluster_name}-bastion"
"hostname" = "${var.cluster_name}-bastion"
"public-keys" = file(var.ssh_public_key_file)
}
vapp_template_id = vcd_catalog_vapp_template.vapp_template.id
# resource allocation for the VM
memory = 1024
cpus = 1
cpu_cores = 1
cpu_hot_add_enabled = true
memory_hot_add_enabled = true
accept_all_eulas = true
power_on = true
# Wait upto 5 minutes for IP addresses to be assigned
network_dhcp_wait_seconds = 300
network {
type = "org"
name = vcd_vapp_org_network.network.org_network_name
ip_allocation_mode = "MANUAL"
ip = cidrhost("${var.gateway_ip}/24", 5)
is_primary = true
}
depends_on = [vcd_vapp_org_network.network]
}
# Create VMs for control plane
resource "vcd_vapp_vm" "control_plane" {
count = var.control_plane_vm_count
vapp_name = vcd_vapp.cluster.name
name = "${var.cluster_name}-cp-${count.index + 1}"
computer_name = "${var.cluster_name}-cp-${count.index + 1}"
metadata_entry {
key = "provisioner"
value = "KubeOne"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "cluster_name"
value = var.cluster_name
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
metadata_entry {
key = "role"
value = "control-plane"
type = "MetadataStringValue"
user_access = "READWRITE"
is_system = false
}
guest_properties = {
"instance-id" = "${var.cluster_name}-cp-${count.index + 1}"
"hostname" = "${var.cluster_name}-cp-${count.index + 1}"
"public-keys" = file(var.ssh_public_key_file)
}
vapp_template_id = vcd_catalog_vapp_template.vapp_template.id
# resource allocation for the VM
memory = var.control_plane_memory
cpus = var.control_plane_cpus
cpu_cores = var.control_plane_cpu_cores
cpu_hot_add_enabled = true
memory_hot_add_enabled = true
accept_all_eulas = true
power_on = true
# Wait upto 5 minutes for IP addresses to be assigned
network_dhcp_wait_seconds = 300
network {
type = "org"
name = vcd_vapp_org_network.network.org_network_name
ip_allocation_mode = "MANUAL"
ip = cidrhost("${var.gateway_ip}/24", 10 + count.index)
is_primary = true
}
override_template_disk {
bus_type = "paravirtual"
size_in_mb = var.control_plane_disk_size_mb
bus_number = 0
unit_number = 0
storage_profile = var.control_plane_disk_storage_profile
}
depends_on = [vcd_vapp_org_network.network]
}
# ======================================================================================================================
# Create SNAT rule to access the Internet
resource "vcd_nsxv_snat" "rule_internet" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
network_type = "ext"
network_name = local.external_network_name
original_address = "${var.gateway_ip}/24"
translated_address = local.external_network_ip
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create Hairpin SNAT rule
resource "vcd_nsxv_snat" "rule_internal" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
network_type = "org"
network_name = vcd_network_routed.network.name
original_address = "${var.gateway_ip}/24"
translated_address = var.gateway_ip
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create DNAT rule to allow SSH from the Internet to bastion host
resource "vcd_nsxv_dnat" "rule_ssh_bastion" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
network_type = "ext"
network_name = local.external_network_name
original_address = local.external_network_ip
original_port = 2222
translated_address = vcd_vapp_vm.bastion.network[0].ip
translated_port = 22
protocol = "tcp"
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# ======================================================================================================================
# Create the firewall rule to access the Internet
resource "vcd_nsxv_firewall_rule" "rule_internet" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-firewall-rule-internet"
action = "accept"
source {
org_networks = [vcd_network_routed.network.name]
}
destination {
ip_addresses = []
}
service {
protocol = "any"
}
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create the firewall rule to allow SSH via bastion from the Internet
resource "vcd_nsxv_firewall_rule" "rule_ssh_bastion" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-firewall-rule-ssh"
action = "accept"
source {
ip_addresses = ["any"]
}
destination {
ip_addresses = [local.external_network_ip]
}
service {
protocol = "tcp"
port = 2222
}
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create the firewall rule to allow access to API server
resource "vcd_nsxv_firewall_rule" "rule_kube_apiserver" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-firewall-rule-kube-apiserver"
action = "accept"
source {
ip_addresses = ["any"]
}
destination {
ip_addresses = [local.external_network_ip]
}
service {
protocol = "tcp"
port = 6443
}
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create the firewall rule to allow access to nginx ingress
resource "vcd_nsxv_firewall_rule" "rule_nginx_ingress" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-firewall-rule-nginx-ingress"
action = "accept"
source {
ip_addresses = ["any"]
}
destination {
ip_addresses = [local.external_network_ip]
}
service {
protocol = "tcp"
port = 80
}
service {
protocol = "tcp"
port = 443
}
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# Create the firewall rule to allow access to nodeports
resource "vcd_nsxv_firewall_rule" "rule_nodeports" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-firewall-rule-nodeports"
action = "accept"
source {
ip_addresses = ["any"]
}
destination {
ip_addresses = [local.external_network_ip]
}
service {
protocol = "tcp"
port = "30000-32767"
}
service {
protocol = "udp"
port = "30000-32767"
}
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
# ======================================================================================================================
# Loadbalancer settings
resource "vcd_lb_app_profile" "app_profile" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-control-plane"
type = "tcp"
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
resource "vcd_lb_service_monitor" "cp_monitor" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-control-plane-monitor"
interval = 15
timeout = 20
max_retries = 5
type = "https"
method = "GET"
url = "/healthz"
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
resource "vcd_lb_server_pool" "control_plane" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-control-plane"
algorithm = "round-robin"
enable_transparency = "true"
monitor_id = vcd_lb_service_monitor.cp_monitor.id
dynamic "member" {
for_each = vcd_vapp_vm.control_plane
content {
condition = "enabled"
name = member.value.name
ip_address = member.value.network[0].ip
port = 6443
monitor_port = 6443
weight = 1
}
}
}
resource "vcd_lb_virtual_server" "control_plane" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-control-plane"
ip_address = local.external_network_ip
protocol = "tcp"
port = 6443
enable_acceleration = true
app_profile_id = vcd_lb_app_profile.app_profile.id
server_pool_id = vcd_lb_server_pool.control_plane.id
}
resource "vcd_lb_service_monitor" "ingress" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-ingress-monitor"
interval = 15
timeout = 20
max_retries = 5
type = "tcp"
# method = "GET"
# url = "/healthz"
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
resource "vcd_lb_server_pool" "ingress-http" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-ingress-http"
algorithm = "round-robin"
enable_transparency = "true"
monitor_id = vcd_lb_service_monitor.ingress.id
dynamic "member" {
for_each = range(0, var.control_plane_vm_count)
content {
condition = "enabled"
name = "${var.cluster_name}-control-plane-${member.value + 1}"
ip_address = cidrhost("${var.gateway_ip}/24", 10 + member.value)
port = 30080
monitor_port = 30080
weight = 1
}
}
}
resource "vcd_lb_virtual_server" "ingress-http" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-ingress-http"
ip_address = local.external_network_ip
protocol = "tcp"
port = 80
enable_acceleration = true
app_profile_id = vcd_lb_app_profile.app_profile.id
server_pool_id = vcd_lb_server_pool.ingress-http.id
}
resource "vcd_lb_server_pool" "ingress-https" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-ingress-https"
algorithm = "round-robin"
enable_transparency = "true"
monitor_id = vcd_lb_service_monitor.ingress.id
dynamic "member" {
for_each = range(0, var.control_plane_vm_count)
content {
condition = "enabled"
name = "${var.cluster_name}-worker-${member.value + 1}"
ip_address = cidrhost("${var.gateway_ip}/24", 10 + member.value)
port = 30443
monitor_port = 30443
weight = 1
}
}
}
resource "vcd_lb_virtual_server" "ingress-https" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-ingress-https"
ip_address = local.external_network_ip
protocol = "tcp"
port = 443
enable_acceleration = true
app_profile_id = vcd_lb_app_profile.app_profile.id
server_pool_id = vcd_lb_server_pool.ingress-https.id
}
# ======================================================================================================================
# WireGuard settings
resource "vcd_lb_app_profile" "udp_profile" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-wireguard"
type = "udp"
depends_on = [vcd_edgegateway_settings.edge_gateway]
}
resource "vcd_lb_server_pool" "wireguard" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-wireguard"
algorithm = "ip-hash"
enable_transparency = "true"
dynamic "member" {
for_each = range(0, var.control_plane_vm_count)
content {
condition = "enabled"
name = "${var.cluster_name}-wireguard-${member.value + 1}"
ip_address = cidrhost("${var.gateway_ip}/24", 10 + member.value)
port = 32518
monitor_port = 32518
weight = 1
}
}
}
resource "vcd_lb_virtual_server" "wireguard" {
edge_gateway = data.vcd_edgegateway.edge_gateway.name
name = "${var.cluster_name}-wireguard"
ip_address = local.external_network_ip
protocol = "udp"
port = 32518
enable_acceleration = true
app_profile_id = vcd_lb_app_profile.udp_profile.id
server_pool_id = vcd_lb_server_pool.wireguard.id
}