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UpCloud server plan, firewall, load balancer integration (#8758)

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* [upcloud] add option to use preconfigured cpu/mem plan

* [upcloud] add option to use firewall rules for API server/SSH access

* [upcloud] add option to use managed load balancer
This commit is contained in:
Ajarmar
2022-05-11 19:15:03 +02:00
committed by GitHub
parent 13443b05a6
commit b9e5b0cb53
11 changed files with 353 additions and 6 deletions
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172
contrib/terraform/upcloud/modules/kubernetes-cluster/main.tf
View File

@@ -10,6 +10,16 @@ locals {
]
])
lb_backend_servers = flatten([
for lb_name, loadbalancer in var.loadbalancers : [
for backend_server in loadbalancer.backend_servers : {
port = loadbalancer.port
lb_name = lb_name
server_name = backend_server
}
]
])
# If prefix is set, all resources will be prefixed with "${var.prefix}-"
# Else don't prefix with anything
resource-prefix = "%{ if var.prefix != ""}${var.prefix}-%{ endif }"
@@ -45,8 +55,9 @@ resource "upcloud_server" "master" {
}
hostname = "${local.resource-prefix}${each.key}"
cpu = each.value.cpu
mem = each.value.mem
plan = each.value.plan
cpu = each.value.plan == null ? each.value.cpu : null
mem = each.value.plan == null ? each.value.mem : null
zone = var.zone
template {
@@ -69,6 +80,8 @@ resource "upcloud_server" "master" {
lifecycle {
ignore_changes = [storage_devices]
}
firewall = var.firewall_enabled
dynamic "storage_devices" {
for_each = {
@@ -99,8 +112,9 @@ resource "upcloud_server" "worker" {
}
hostname = "${local.resource-prefix}${each.key}"
cpu = each.value.cpu
mem = each.value.mem
plan = each.value.plan
cpu = each.value.plan == null ? each.value.cpu : null
mem = each.value.plan == null ? each.value.mem : null
zone = var.zone
template {
@@ -124,6 +138,8 @@ resource "upcloud_server" "worker" {
ignore_changes = [storage_devices]
}
firewall = var.firewall_enabled
dynamic "storage_devices" {
for_each = {
for disk_key_name, disk in upcloud_storage.additional_disks :
@@ -144,3 +160,151 @@ resource "upcloud_server" "worker" {
create_password = false
}
}
resource "upcloud_firewall_rules" "master" {
for_each = upcloud_server.master
server_id = each.value.id
dynamic firewall_rule {
for_each = var.master_allowed_remote_ips
content {
action = "accept"
comment = "Allow master API access from this network"
destination_port_end = "6443"
destination_port_start = "6443"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = firewall_rule.value.end_address
source_address_start = firewall_rule.value.start_address
}
}
dynamic firewall_rule {
for_each = length(var.master_allowed_remote_ips) > 0 ? [1] : []
content {
action = "drop"
comment = "Deny master API access from other networks"
destination_port_end = "6443"
destination_port_start = "6443"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = "255.255.255.255"
source_address_start = "0.0.0.0"
}
}
dynamic firewall_rule {
for_each = var.k8s_allowed_remote_ips
content {
action = "accept"
comment = "Allow SSH from this network"
destination_port_end = "22"
destination_port_start = "22"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = firewall_rule.value.end_address
source_address_start = firewall_rule.value.start_address
}
}
dynamic firewall_rule {
for_each = length(var.k8s_allowed_remote_ips) > 0 ? [1] : []
content {
action = "drop"
comment = "Deny SSH from other networks"
destination_port_end = "22"
destination_port_start = "22"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = "255.255.255.255"
source_address_start = "0.0.0.0"
}
}
}
resource "upcloud_firewall_rules" "k8s" {
for_each = upcloud_server.worker
server_id = each.value.id
dynamic firewall_rule {
for_each = var.k8s_allowed_remote_ips
content {
action = "accept"
comment = "Allow SSH from this network"
destination_port_end = "22"
destination_port_start = "22"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = firewall_rule.value.end_address
source_address_start = firewall_rule.value.start_address
}
}
dynamic firewall_rule {
for_each = length(var.k8s_allowed_remote_ips) > 0 ? [1] : []
content {
action = "drop"
comment = "Deny SSH from other networks"
destination_port_end = "22"
destination_port_start = "22"
direction = "in"
family = "IPv4"
protocol = "tcp"
source_address_end = "255.255.255.255"
source_address_start = "0.0.0.0"
}
}
}
resource "upcloud_loadbalancer" "lb" {
count = var.loadbalancer_enabled ? 1 : 0
configured_status = "started"
name = "${local.resource-prefix}lb"
plan = var.loadbalancer_plan
zone = var.zone
network = upcloud_network.private.id
}
resource "upcloud_loadbalancer_backend" "lb_backend" {
for_each = var.loadbalancer_enabled ? var.loadbalancers : {}
loadbalancer = upcloud_loadbalancer.lb[0].id
name = "lb-backend-${each.key}"
}
resource "upcloud_loadbalancer_frontend" "lb_frontend" {
for_each = var.loadbalancer_enabled ? var.loadbalancers : {}
loadbalancer = upcloud_loadbalancer.lb[0].id
name = "lb-frontend-${each.key}"
mode = "tcp"
port = each.value.port
default_backend_name = upcloud_loadbalancer_backend.lb_backend[each.key].name
}
resource "upcloud_loadbalancer_static_backend_member" "lb_backend_member" {
for_each = {
for be_server in local.lb_backend_servers:
"${be_server.server_name}-lb-backend-${be_server.lb_name}" => be_server
if var.loadbalancer_enabled
}
backend = upcloud_loadbalancer_backend.lb_backend[each.value.lb_name].id
name = "${local.resource-prefix}${each.key}"
ip = merge(upcloud_server.master, upcloud_server.worker)[each.value.server_name].network_interface[1].ip_address
port = each.value.port
weight = 100
max_sessions = var.loadbalancer_plan == "production-small" ? 50000 : 1000
enabled = true
}

4
contrib/terraform/upcloud/modules/kubernetes-cluster/output.tf
View File

@@ -18,3 +18,7 @@ output "worker_ip" {
}
}
}
output "loadbalancer_domain" {
value = var.loadbalancer_enabled ? upcloud_loadbalancer.lb[0].dns_name : null
}

36
contrib/terraform/upcloud/modules/kubernetes-cluster/variables.tf
View File

@@ -16,6 +16,7 @@ variable "machines" {
description = "Cluster machines"
type = map(object({
node_type = string
plan = string
cpu = string
mem = string
disk_size = number
@@ -29,3 +30,38 @@ variable "machines" {
variable "ssh_public_keys" {
type = list(string)
}
variable "firewall_enabled" {
type = bool
}
variable "master_allowed_remote_ips" {
type = list(object({
start_address = string
end_address = string
}))
}
variable "k8s_allowed_remote_ips" {
type = list(object({
start_address = string
end_address = string
}))
}
variable "loadbalancer_enabled" {
type = bool
}
variable "loadbalancer_plan" {
type = string
}
variable "loadbalancers" {
description = "Load balancers"
type = map(object({
port = number
backend_servers = list(string)
}))
}

2
contrib/terraform/upcloud/modules/kubernetes-cluster/versions.tf
View File

@@ -3,7 +3,7 @@ terraform {
required_providers {
upcloud = {
source = "UpCloudLtd/upcloud"
version = "~>2.0.0"
version = "~>2.4.0"
}
}
required_version = ">= 0.13"