feat(dns): setup cloudflared tunnel and DNS records

cloudflare/.terraform.lock.hcl

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+# This file is maintained automatically by "tofu init".
+# Manual edits may be lost in future updates.
+
+provider "registry.opentofu.org/cloudflare/cloudflare" {
+  version     = "5.10.1"
+  constraints = "~> 5.0"
+  hashes = [
+    "h1:fZArdZ2UjlXNHB4cEsnUKDRS1+rxX2MOauNC8SFarQo=",
+    "zh:0f127587ae7a20a3de23bbb05b0859eb3e418912a6e2adef95f53f225f4f9da1",
+    "zh:2ba095c6f7aa71fd140e0f57866b3a5b34152354f13de53f99037cc8386d9803",
+    "zh:2d46cc0bc820e455e6386e3cf834b5876f9cacc8554733fd61ce4c758ca43d81",
+    "zh:47b9996d6e99e4b9a26d390baaa1dcc2e5c846c6a1423c2aed1bc945c4f447ad",
+    "zh:97c49f130edaac5ed4c17bd93706be88d5061a80b77484ae2e8f83d25df9b8ba",
+    "zh:bd6af14ffdb1330eb8fd31a7b5e5362b08390bec53c75eda448203a473e5b36a",
+    "zh:f77a6cc61754ee4406c765f198d13a465f9457ed546749cd3f49b8fe8378dfab",
+    "zh:f809ab383cca0a5f83072981c64208cbd7fa67e986a86ee02dd2c82333221e32",
+    "zh:f9324dc4f2e0a2e6abcd9ecabdd0a09dbb00e4ad9aa24437dfe1ea7a219fb2c8",
+  ]
+}
+
+provider "registry.opentofu.org/hashicorp/cloudflare" {
+  version = "5.10.1"
+  hashes = [
+    "h1:fZArdZ2UjlXNHB4cEsnUKDRS1+rxX2MOauNC8SFarQo=",
+    "zh:0f127587ae7a20a3de23bbb05b0859eb3e418912a6e2adef95f53f225f4f9da1",
+    "zh:2ba095c6f7aa71fd140e0f57866b3a5b34152354f13de53f99037cc8386d9803",
+    "zh:2d46cc0bc820e455e6386e3cf834b5876f9cacc8554733fd61ce4c758ca43d81",
+    "zh:47b9996d6e99e4b9a26d390baaa1dcc2e5c846c6a1423c2aed1bc945c4f447ad",
+    "zh:97c49f130edaac5ed4c17bd93706be88d5061a80b77484ae2e8f83d25df9b8ba",
+    "zh:bd6af14ffdb1330eb8fd31a7b5e5362b08390bec53c75eda448203a473e5b36a",
+    "zh:f77a6cc61754ee4406c765f198d13a465f9457ed546749cd3f49b8fe8378dfab",
+    "zh:f809ab383cca0a5f83072981c64208cbd7fa67e986a86ee02dd2c82333221e32",
+    "zh:f9324dc4f2e0a2e6abcd9ecabdd0a09dbb00e4ad9aa24437dfe1ea7a219fb2c8",
+  ]
+}

cloudflare/README.md

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+# README
+
+## TODO
+- don't forget to mention namecheap -> cloudflare NS
+NS lloyd.ns.cloudflare.com
+NS meadow.ns.cloudflare.com
+
+Create token
+https://developers.cloudflare.com/fundamentals/api/get-started/account-owned-tokens/
+
+Token access
+Kostiantyn Bukliei - Cloudflare Tunnel:Edit, Zero Trust:Edit, Access: Apps and Policies:Edit
+    madunde.ad - DNS:Edit

cloudflare/dns/main.tf

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+# Root A Record
+resource "cloudflare_dns_record" "root_dns_record" {
+  zone_id = var.cloudflare_zone_id
+  name    = "madunde.ad"
+  ttl     = 3600
+  type    = "A"
+  content = "193.93.217.193"
+  proxied = false
+}
+
+# CNAME Records for each service declared in services module
+resource "cloudflare_dns_record" "cname_record" {
+  for_each = var.services
+  zone_id  = var.cloudflare_zone_id
+  name     = "${each.value.subdomain}.madunde.ad"
+  content  = "${var.cloudflare_tunnel_id}.cfargotunnel.com"
+  type     = "CNAME"
+  ttl      = 1
+  proxied  = true
+}

cloudflare/dns/variables.tf

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+variable "cloudflare_zone_id" {
+  description = "Cloudflare Zone ID"
+  type        = string
+  sensitive   = true
+}
+
+variable "cloudflare_tunnel_id" {
+  description = "Cloudflare Zone ID"
+  type        = string
+  sensitive   = true
+}
+
+variable "services" {
+  description = "Services to expose to the outside world"
+  type = map(object({
+    subdomain = string
+    service   = string
+    policy    = string
+  }))
+}

cloudflare/main.tf

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+terraform {
+  required_providers {
+    cloudflare = {
+      source  = "cloudflare/cloudflare"
+      version = "~> 5"
+    }
+  }
+}
+
+provider "cloudflare" {
+  api_token = var.cloudflare_api_token
+}
+
+module "services" {
+  source = "./services"
+}
+
+module "dns" {
+  source               = "./dns"
+  services             = module.services.services
+  cloudflare_zone_id   = var.cloudflare_zone_id
+  cloudflare_tunnel_id = cloudflare_zero_trust_tunnel_cloudflared.ratchet_tunnel.id
+}
+
+module "policies" {
+  source                = "./policies"
+  cloudflare_zone_id    = var.cloudflare_zone_id
+  cloudflare_account_id = var.cloudflare_account_id
+  cloudflare_email      = var.cloudflare_email
+}
+
+resource "cloudflare_zero_trust_tunnel_cloudflared" "ratchet_tunnel" {
+  account_id    = var.cloudflare_account_id
+  tunnel_secret = var.cloudflared_tunnel_secret
+  name          = "cloudflare > ratchet tunnel"
+  config_src    = "cloudflare"
+}
+
+resource "cloudflare_zero_trust_tunnel_cloudflared_config" "ratchet_tunnel_config" {
+  account_id = var.cloudflare_account_id
+  tunnel_id  = cloudflare_zero_trust_tunnel_cloudflared.ratchet_tunnel.id
+  config = {
+    ingress = concat([for k, v in module.services.services : { hostname = "${v.subdomain}.madunde.ad", service = v.service }], [{ service = "http_status:404" }])
+  }
+}
+
+resource "cloudflare_zero_trust_access_application" "access_application" {
+  for_each   = module.services.services
+  account_id = var.cloudflare_account_id
+  zone_id    = var.cloudflare_zone_id
+  domain     = "${each.value.subdomain}.madunde.ad"
+  type       = "self_hosted"
+  name       = "Access application for ${each.value.subdomain}.madunde.ad"
+  policies = [
+    {
+      id         = module.policies[each.value.policy].id
+      precedence = 1
+    }
+  ]
+}

cloudflare/output.tf

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+output "tunnel_secret" {
+  description = "TODO"
+  value       = cloudflare_zero_trust_tunnel_cloudflared.ratchet_tunnel.tunnel_secret
+  sensitive   = true
+}

cloudflare/policies/main.tf

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+resource "cloudflare_zero_trust_list" "family_emails" {
+  account_id = var.cloudflare_account_id
+  name       = "Me & Family"
+  type       = "EMAIL"
+  items = [
+    {
+      value = "madundead@gmail.com",
+    },
+    {
+      value = "mail.elenka@gmail.com"
+    }
+  ]
+}
+
+resource "cloudflare_zero_trust_access_policy" "allow_myself" {
+  account_id = var.cloudflare_account_id
+  name       = "Allow myself, by OTP via email"
+  decision   = "allow"
+  include = [
+    {
+      email = {
+        email = var.cloudflare_email
+      }
+    }
+  ]
+}
+
+resource "cloudflare_zero_trust_access_policy" "allow_myself_and_family" {
+  account_id = var.cloudflare_account_id
+  name       = "Allow myself & Olena by OTP via email"
+  decision   = "allow"
+  include = [
+    {
+      email_list = cloudflare_zero_trust_list.family_emails
+    }
+  ]
+}
+
+resource "cloudflare_zero_trust_access_policy" "allow_everyone" {
+  account_id = var.cloudflare_account_id
+  name       = "Allow everyone"
+  decision   = "bypass"
+  include = [{
+    everyone = {}
+  }]
+}

cloudflare/policies/output.tf

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+output "allow_myself" {
+  description = "Allow madundead@gmail.com via OTP"
+  value       = cloudflare_zero_trust_access_policy.allow_myself
+}
+
+output "allow_myself_and_family" {
+  description = "Allow emails listed in cloudflare_zero_trust_list.family_emails"
+  value       = cloudflare_zero_trust_access_policy.allow_myself_and_family
+}
+
+
+output "allow_everyone" {
+  description = "Allow everyone"
+  value       = cloudflare_zero_trust_access_policy.allow_everyone
+}

cloudflare/policies/variables.tf

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+variable "cloudflare_zone_id" {
+  type      = string
+  sensitive = true
+}
+
+variable "cloudflare_account_id" {
+  type      = string
+  sensitive = true
+}
+
+variable "cloudflare_email" {
+  type      = string
+  sensitive = true
+}

cloudflare/services/output.tf

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+output "services" {
+  description = "Services to expose to the outside world"
+  value       = local.services
+}

cloudflare/services/services.tf

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+locals {
+  services = {
+    homer = {
+      subdomain = "home"
+      service   = "http://192.168.0.101:8888"
+      policy    = "allow_myself_and_family"
+    },
+    gitea = {
+      subdomain = "git"
+      service   = "http://192.168.0.101:3000"
+      policy    = "allow_everyone"
+    }
+  }
+}

cloudflare/variables.tf

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+variable "cloudflare_zone_id" {
+  description = "Zone ID for your domain"
+  type        = string
+}
+
+variable "cloudflare_account_id" {
+  description = "Account ID for your Cloudflare account"
+  type        = string
+  sensitive   = true
+}
+
+variable "cloudflare_email" {
+  description = "Email address for your Cloudflare account"
+  type        = string
+}
+
+variable "cloudflare_api_token" {
+  description = "Cloudflare API token"
+  type        = string
+  sensitive   = true
+}
+
+variable "cloudflared_tunnel_secret" {
+  description = "Cloudflare cloudflared auth secret"
+  type        = string
+  sensitive   = true
+}