main.tf

## State storage
terraform {
  backend "s3" {}
}

## AWS
provider "aws" {
  region = "us-east-1"
}

variable "gitlab_com_zone_id" {}
variable "gitlab_net_zone_id" {}

## Google

provider "google" {
  project = "${var.project}"
  region  = "${var.region}"
}

##################################
#
#  Allow internal traffic
#
#################################

resource "google_compute_firewall" "allow-internal" {
  name    = "allow-internal-${var.environment}"
  network = "${module.network.self_link}"

  allow {
    protocol = "all"
  }

  source_ranges = ["10.0.0.0/8"]
}

resource "google_compute_firewall" "allow-lb-traffic" {
  name    = "allow-lb-traffic-${var.environment}"
  network = "${module.network.self_link}"

  allow {
    protocol = "all"
  }

  source_ranges = ["130.211.0.0/22", "35.191.0.0/16"]
}

/*
##################################
#
#  NAT gateway
#
#################################
module "nat" {
  source     = "GoogleCloudPlatform/nat-gateway/google"
  region     = "${var.region}"
  network    = "gprd"
}
*/
##################################
#
#  Network
#
#################################

module "network" {
  source      = "../../modules/google/vpc"
  project     = "${var.project}"
  environment = "${var.environment}"
}

##################################
#
#  Web front-end
#
#################################

module "web" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["web"]}"
  machine_type     = "${var.machine_types["web"]}"
  name             = "web"
  node_count       = "${var.node_count["web"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["web"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "sv"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  API
#
#################################

module "api" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["api"]}"
  machine_type     = "${var.machine_types["api"]}"
  name             = "api"
  node_count       = "${var.node_count["api"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["api"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "sv"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  Git
#
##################################

module "git" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["git"]}"
  machine_type     = "${var.machine_types["git"]}"
  name             = "git"
  node_count       = "${var.node_count["git"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["git"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "sv"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  Database
#
#################################

module "postgres" {
  attach_data_disk = true
  data_disk_size   = 5000
  data_disk_type   = "pd-ssd"
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["db"]}"
  machine_type     = "${var.machine_types["db"]}"
  name             = "postgres"
  node_count       = "${var.node_count["db"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["db"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "db"
  vpc              = "${module.network.self_link}"
}

module "pg-bouncer" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["pgb"]}"
  machine_type     = "${var.machine_types["pgb"]}"
  name             = "pgbouncer"
  node_count       = "${var.node_count["pgb"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["pgb"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "db"
  vpc              = "${module.network.self_link}"
}

module "geo-postgres" {
  attach_data_disk = true
  data_disk_size   = 5000
  data_disk_type   = "pd-ssd"
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["geodb"]}"
  machine_type     = "${var.machine_types["geodb"]}"
  name             = "geo-postgres"
  node_count       = "${var.node_count["geodb"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["geodb"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "db"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  Redis
#
##################################

module "redis" {
  attach_data_disk = true
  data_disk_size   = 100
  data_disk_type   = "pd-ssd"
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["redis"]}"
  machine_type     = "${var.machine_types["redis"]}"
  name             = "redis"
  node_count       = "${var.node_count["redis"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["redis"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-stor"
  tier             = "db"
  vpc              = "${module.network.self_link}"
}

module "redis-cache" {
  attach_data_disk = true
  data_disk_size   = 100
  data_disk_type   = "pd-ssd"
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["redis-cache"]}"
  machine_type     = "${var.machine_types["redis-cache"]}"
  name             = "redis-cache"
  node_count       = "${var.node_count["redis-cache"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["redis-cache"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-stor"
  tier             = "db"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  Sidekiq
#
##################################

module "sidekiq" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["sidekiq"]}"
  machine_type     = "${var.machine_types["sidekiq-besteffort"]}"
  name             = "sidekiq-besteffort"
  node_count       = "${var.node_count["sidekiq-besteffort"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["sidekiq"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "sv"
  vpc              = "${module.network.self_link}"
}

##################################
#
#  Storage nodes for repositories
#
##################################

module "file" {
  attach_data_disk = true
  data_disk_size   = 16000
  data_disk_type   = "pd-ssd"
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["stor"]}"
  machine_type     = "${var.machine_types["stor"]}"
  name             = "file"
  node_count       = "${var.node_count["stor"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["stor"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-stor"
  tier             = "stor"
  vpc              = "${module.network.self_link}"
  zone             = "us-east1-c"
}

##################################
#
#  Storage nodes for
#  uploads/lfs/pages/artifacts/builds/cache
#
#  share:
#    gitlab-ci/builds
#    gitlab-rails/shared/cache
#    gitlab-rails/shared/tmp
#    gitlab-rails/uploads
#
#  lfs:
#    gitlab-rails/shared/lfs-objects
#
#  pages:
#    gitlab-rails/shared/pages
#
#  artifacts:
#    gitlab-rails/shared/artifacts
#
##################################

module "share" {
  attach_data_disk = true

  data_disk_size = 16000
  data_disk_type = "pd-standard"
  chef_provision = "${var.chef_provision}"
  chef_run_list  = "${var.empty_chef_run_list}"
  dns_zone_name  = "${var.dns_zone_name}"
  environment    = "${var.environment}"
  ip_cidr_range  = "${var.subnetworks["share"]}"
  machine_type   = "${var.machine_types["stor"]}"
  name           = "share"
  node_count     = "${var.node_count["share"]}"
  project        = "${var.project}"
  public_ports   = "${var.public_ports["stor"]}"
  region         = "${var.region}"
  source         = "../../modules/google/generic-pet"
  tier           = "stor"
  vpc            = "${module.network.self_link}"
}

module "lfs" {
  attach_data_disk = true

  data_disk_size = 16000
  data_disk_type = "pd-standard"
  chef_provision = "${var.chef_provision}"
  chef_run_list  = "${var.empty_chef_run_list}"
  dns_zone_name  = "${var.dns_zone_name}"
  environment    = "${var.environment}"
  ip_cidr_range  = "${var.subnetworks["lfs"]}"
  machine_type   = "${var.machine_types["stor"]}"
  name           = "lfs"
  node_count     = "${var.node_count["lfs"]}"
  project        = "${var.project}"
  public_ports   = "${var.public_ports["stor"]}"
  region         = "${var.region}"
  source         = "../../modules/google/generic-pet"
  tier           = "stor"
  vpc            = "${module.network.self_link}"
}

module "pages" {
  attach_data_disk = true

  data_disk_size = 16000
  data_disk_type = "pd-standard"
  chef_provision = "${var.chef_provision}"
  chef_run_list  = "${var.empty_chef_run_list}"
  dns_zone_name  = "${var.dns_zone_name}"
  environment    = "${var.environment}"
  ip_cidr_range  = "${var.subnetworks["pages"]}"
  machine_type   = "${var.machine_types["stor"]}"
  name           = "pages"
  node_count     = "${var.node_count["pages"]}"
  project        = "${var.project}"
  public_ports   = "${var.public_ports["stor"]}"
  region         = "${var.region}"
  source         = "../../modules/google/generic-pet"
  tier           = "stor"
  vpc            = "${module.network.self_link}"
}

module "artifacts" {
  attach_data_disk = true

  data_disk_size = 32000
  data_disk_type = "pd-standard"
  chef_provision = "${var.chef_provision}"
  chef_run_list  = "${var.empty_chef_run_list}"
  dns_zone_name  = "${var.dns_zone_name}"
  environment    = "${var.environment}"
  ip_cidr_range  = "${var.subnetworks["artifacts"]}"
  machine_type   = "${var.machine_types["stor"]}"
  name           = "artifacts"
  node_count     = "${var.node_count["artifacts"]}"
  project        = "${var.project}"
  public_ports   = "${var.public_ports["stor"]}"
  region         = "${var.region}"
  source         = "../../modules/google/generic-pet"
  tier           = "stor"
  vpc            = "${module.network.self_link}"
}

##################################
#
#  External LoadBalancer
#
##################################

module "fe-lb" {
  attach_data_disk = false
  chef_provision   = "${var.chef_provision}"
  chef_run_list    = "${var.empty_chef_run_list}"
  dns_zone_name    = "${var.dns_zone_name}"
  environment      = "${var.environment}"
  ip_cidr_range    = "${var.subnetworks["fe-lb"]}"
  machine_type     = "${var.machine_types["fe-lb"]}"
  name             = "fe"
  node_count       = "${var.node_count["fe-lb"]}"
  project          = "${var.project}"
  public_ports     = "${var.public_ports["fe-lb"]}"
  region           = "${var.region}"
  source           = "../../modules/google/generic-pet"
  tier             = "lb"
  vpc              = "${module.network.self_link}"
}

module "google_load_balancers" {
  source             = "./load-balancers"
  project            = "${var.project}"
  region             = "${var.region}"
  fe_http_instances  = "${module.fe-lb.instances_without_attached_disk_self_link}"
  fe_https_instances = "${module.fe-lb.instances_without_attached_disk_self_link}"
  fe_ssh_instances   = "${module.fe-lb.instances_without_attached_disk_self_link}"
}

##################################
#
#  Consul
#
##################################

module "consul" {
  chef_provision = "${var.chef_provision}"
  chef_run_list  = "${var.empty_chef_run_list}"
  dns_zone_name  = "${var.dns_zone_name}"
  environment    = "${var.environment}"
  ip_cidr_range  = "${var.subnetworks["consul"]}"
  machine_type   = "${var.machine_types["consul"]}"
  name           = "consul"
  node_count     = "${var.node_count["consul"]}"
  project        = "${var.project}"
  public_ports   = "${var.public_ports["consul"]}"
  region         = "${var.region}"
  source         = "../../modules/google/generic-nodisk"
  tier           = "inf"
  vpc            = "${module.network.self_link}"
}

##################################
#
#  Monitoring
#
##################################

resource "google_compute_subnetwork" "monitoring" {
  name                     = "${format("monitoring-%v", var.environment)}"
  network                  = "${module.network.self_link}"
  project                  = "${var.project}"
  region                   = "${var.region}"
  ip_cidr_range            = "${var.subnetworks["monitoring"]}"
  private_ip_google_access = true
}

resource "google_compute_firewall" "monitoring" {
  name    = "${format("monitoring-%v", var.environment)}"
  network = "${module.network.self_link}"

  allow {
    protocol = "tcp"
    ports    = ["${var.public_ports["monitoring"]}"]
  }

  source_ranges = ["0.0.0.0/0"]
  target_tags   = ["performance", "prometheus"]
}

module "performance" {
  subnetwork_name      = "${google_compute_subnetwork.monitoring.name}"
  attach_data_disk     = true
  data_disk_size       = 100
  data_disk_type       = "pd-standard"
  chef_provision       = "${var.chef_provision}"
  chef_run_list        = "${var.empty_chef_run_list}"
  dns_zone_name        = "${var.dns_zone_name}"
  environment          = "${var.environment}"
  machine_type         = "${var.machine_types["monitoring"]}"
  name                 = "performance"
  node_count           = "${var.node_count["performance"]}"
  project              = "${var.project}"
  region               = "${var.region}"
  source               = "../../modules/google/monitoring"
  tier                 = "inf"
  persistent_disk_path = "/opt"
  bootstrap_version    = 2
  gitlab_com_zone_id   = "${var.gitlab_com_zone_id}"
  cert_link            = "projects/gitlab-production/global/sslCertificates/gprd-wildcard"
  service_port         = "80"
  service_path         = "/login"
  oauth2_client_id     = "${var.oauth2_client_id}"
  oauth2_client_secret = "${var.oauth2_client_secret}"
}

module "prometheus" {
  subnetwork_name      = "${google_compute_subnetwork.monitoring.name}"
  attach_data_disk     = true
  data_disk_size       = 1000
  data_disk_type       = "pd-standard"
  chef_provision       = "${var.chef_provision}"
  chef_run_list        = "${var.empty_chef_run_list}"
  dns_zone_name        = "${var.dns_zone_name}"
  environment          = "${var.environment}"
  machine_type         = "${var.machine_types["monitoring"]}"
  name                 = "prometheus"
  node_count           = "${var.node_count["prometheus"]}"
  project              = "${var.project}"
  region               = "${var.region}"
  source               = "../../modules/google/monitoring"
  tier                 = "inf"
  persistent_disk_path = "/opt/prometheus"
  bootstrap_version    = 2
  gitlab_com_zone_id   = "${var.gitlab_com_zone_id}"
  cert_link            = "projects/gitlab-production/global/sslCertificates/gprd-wildcard"
  service_port         = "9090"
  service_path         = "/graph"
  oauth2_client_id     = "${var.oauth2_client_id}"
  oauth2_client_secret = "${var.oauth2_client_secret}"
}

##################################
#
#  VPN connection to Azure
#
#  Currently disabled as it isn't
#  necessary
#
##################################


# module "google-azure-vpn" {
#   source        = "../../modules/google/vpn"
#   name          = "gcp-azure-${var.environment}"
#   network_name  = "${module.network.self_link}"
#   network_link  = "${module.network.name}"
#   region        = "${var.region}"
#   peer_ip       = "${var.vpn_peer_address}"
#   shared_secret = "${var.vpn_shared_secret}"
#   dest_subnet   = "${var.vpn_dest_subnet}"
#   source_subnet = "${var.vpn_source_subnet}"
# }