Name	Name	Last commit message	Last commit date
parent directory ..
README.md	README.md
main.tf	main.tf
outputs.tf	outputs.tf
psa.tf	psa.tf
routes.tf	routes.tf
subnets.tf	subnets.tf
variables.tf	variables.tf
versions.tf	versions.tf

VPC module

This module allows creation and management of VPC networks including subnetworks and subnetwork IAM bindings, and most features and options related to VPCs and subnets.

Simple VPC

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "production"
      region        = "europe-west1"
      secondary_ip_ranges = {
        pods     = "172.16.0.0/20"
        services = "192.168.0.0/24"
      }
    },
    {
      ip_cidr_range = "10.0.16.0/24"
      name          = "production"
      region        = "europe-west2"
    }
  ]
}
# tftest modules=1 resources=5 inventory=simple.yaml

Subnet Options

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  subnets = [
    # simple subnet
    {
      name          = "simple"
      region        = "europe-west1"
      ip_cidr_range = "10.0.0.0/24"
    },
    # custom description and PGA disabled
    {
      name                  = "no-pga"
      region                = "europe-west1"
      ip_cidr_range         = "10.0.1.0/24",
      description           = "Subnet b"
      enable_private_access = false
    },
    # secondary ranges
    {
      name          = "with-secondary-ranges"
      region        = "europe-west1"
      ip_cidr_range = "10.0.2.0/24"
      secondary_ip_ranges = {
        a = "192.168.0.0/24"
        b = "192.168.1.0/24"
      }
    },
    # enable flow logs
    {
      name          = "with-flow-logs"
      region        = "europe-west1"
      ip_cidr_range = "10.0.3.0/24"
      flow_logs_config = {
        flow_sampling        = 0.5
        aggregation_interval = "INTERVAL_10_MIN"
      }
    }
  ]
}
# tftest modules=1 resources=7 inventory=subnet-options.yaml

Subnet IAM

Subnet IAM variables follow our general interface, with extra keys/members for the subnet to which each binding will be applied.

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  subnets = [
    {
      name          = "subnet-1"
      region        = "europe-west1"
      ip_cidr_range = "10.0.1.0/24"
      iam = {
        "roles/compute.networkUser" = [
          "user:[email protected]", "group:[email protected]"
        ]
      }
      iam_bindings = {
        subnet-1-iam = {
          members = ["group:[email protected]"]
          role    = "roles/compute.networkUser"
          condition = {
            expression = "resource.matchTag('123456789012/env', 'prod')"
            title      = "test_condition"
          }
        }
      }
    },
    {
      name          = "subnet-2"
      region        = "europe-west1"
      ip_cidr_range = "10.0.1.0/24"
      iam_bindings_additive = {
        subnet-2-iam = {
          member = "user:[email protected]"
          role   = "roles/compute.networkUser"
          subnet = "europe-west1/subnet-2"
        }
      }
    }
  ]
}
# tftest modules=1 resources=8 inventory=subnet-iam.yaml

Peering

A single peering can be configured for the VPC, so as to allow management of simple scenarios, and more complex configurations like hub and spoke by defining the peering configuration on the spoke VPCs. Care must be taken so as a single peering is created/changed/destroyed at a time, due to the specific behaviour of the peering API calls.

If you only want to create the "local" side of the peering, use peering_create_remote_end to false. This is useful if you don't have permissions on the remote project/VPC to create peerings.

module "vpc-hub" {
  source     = "./fabric/modules/net-vpc"
  project_id = "hub"
  name       = "vpc-hub"
  subnets = [{
    ip_cidr_range = "10.0.0.0/24"
    name          = "subnet-1"
    region        = "europe-west1"
  }]
}

module "vpc-spoke-1" {
  source     = "./fabric/modules/net-vpc"
  project_id = "spoke1"
  name       = "vpc-spoke1"
  subnets = [{
    ip_cidr_range = "10.0.1.0/24"
    name          = "subnet-2"
    region        = "europe-west1"
  }]
  peering_config = {
    peer_vpc_self_link = module.vpc-hub.self_link
    import_routes      = true
  }
}
# tftest modules=2 resources=10 inventory=peering.yaml

Shared VPC

Shared VPC is a project-level functionality which enables a project to share its VPCs with other projects. The shared_vpc_host variable is here to help with rapid prototyping, we recommend leveraging the project module for production usage.

locals {
  service_project_1 = {
    project_id                     = "project1"
    gke_service_account            = "serviceAccount:gke"
    cloud_services_service_account = "serviceAccount:cloudsvc"
  }
  service_project_2 = {
    project_id = "project2"
  }
}

module "vpc-host" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-host-network"
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "subnet-1"
      region        = "europe-west1"
      secondary_ip_ranges = {
        pods     = "172.16.0.0/20"
        services = "192.168.0.0/24"
      }
      iam = {
        "roles/compute.networkUser" = [
          local.service_project_1.cloud_services_service_account,
          local.service_project_1.gke_service_account
        ]
        "roles/compute.securityAdmin" = [
          local.service_project_1.gke_service_account
        ]
      }
    }
  ]
  shared_vpc_host = true
  shared_vpc_service_projects = [
    local.service_project_1.project_id,
    local.service_project_2.project_id
  ]
}
# tftest modules=1 resources=9 inventory=shared-vpc.yaml

Private Service Networking

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "production"
      region        = "europe-west1"
    }
  ]
  psa_config = {
    ranges = { myrange = "10.0.1.0/24" }
  }
}
# tftest modules=1 resources=7 inventory=psa.yaml

Private Service Networking with peering routes and peered Cloud DNS domains

Custom routes can be optionally exported/imported through the peering formed with the Google managed PSA VPC.

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "production"
      region        = "europe-west1"
    }
  ]
  psa_config = {
    ranges         = { myrange = "10.0.1.0/24" }
    export_routes  = true
    import_routes  = true
    peered_domains = ["gcp.example.com."]
  }
}
# tftest modules=1 resources=8 inventory=psa-routes.yaml

Subnets for Private Service Connect, Proxy-only subnets

Along with common private subnets module supports creation more service specific subnets for the following purposes:

Proxy-only subnets for Regional HTTPS Internal HTTPS Load Balancers
Private Service Connect subnets

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"

  subnets_proxy_only = [
    {
      ip_cidr_range = "10.0.1.0/24"
      name          = "regional-proxy"
      region        = "europe-west1"
      active        = true
    },
    {
      ip_cidr_range = "10.0.4.0/24"
      name          = "global-proxy"
      region        = "australia-southeast2"
      active        = true
      global        = true
    }
  ]
  subnets_psc = [
    {
      ip_cidr_range = "10.0.3.0/24"
      name          = "psc"
      region        = "europe-west1"
    }
  ]
}
# tftest modules=1 resources=6 inventory=proxy-only-subnets.yaml

DNS Policies

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  dns_policy = {
    inbound = true
    outbound = {
      private_ns = ["10.0.0.1"]
      public_ns  = ["8.8.8.8"]
    }
  }
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "production"
      region        = "europe-west1"
    }
  ]
}
# tftest modules=1 resources=5 inventory=dns-policies.yaml

Subnet Factory

The net-vpc module includes a subnet factory (see Resource Factories) for the massive creation of subnets leveraging one configuration file per subnet. The factory also supports proxy-only and PSC subnets via the purpose attribute. The name attribute is optional and defaults to the file name, allowing to use the same name for subnets in different regions.

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  factories_config = {
    subnets_folder = "config/subnets"
  }
}
# tftest modules=1 resources=10 files=subnet-simple,subnet-simple-2,subnet-detailed,subnet-proxy,subnet-proxy-global,subnet-psc inventory=factory.yaml

# tftest-file id=subnet-simple path=config/subnets/subnet-simple.yaml
name: simple
region: europe-west4
ip_cidr_range: 10.0.1.0/24

# tftest-file id=subnet-simple-2 path=config/subnets/subnet-simple-2.yaml
name: simple
region: europe-west8
ip_cidr_range: 10.0.2.0/24

# tftest-file id=subnet-detailed path=config/subnets/subnet-detailed.yaml
region: europe-west1
description: Sample description
ip_cidr_range: 10.0.0.0/24
# optional attributes
enable_private_access: false  # defaults to true
iam:
  roles/compute.networkUser:
    - group:[email protected]
    - serviceAccount:[email protected]
    - user:[email protected]
secondary_ip_ranges:          # map of secondary ip ranges
  secondary-range-a: 192.168.0.0/24
flow_logs_config:             # enable, set to empty map to use defaults
  aggregation_interval: "INTERVAL_5_SEC"
  flow_sampling: 0.5
  metadata: "INCLUDE_ALL_METADATA"

# tftest-file id=subnet-proxy path=config/subnets/subnet-proxy.yaml
region: europe-west4
ip_cidr_range: 10.1.0.0/24
proxy_only: true

# tftest-file id=subnet-proxy-global path=config/subnets/subnet-proxy-global.yaml
region: australia-southeast2
ip_cidr_range: 10.4.0.0/24
proxy_only: true
global: true

# tftest-file id=subnet-psc path=config/subnets/subnet-psc.yaml
region: europe-west4
ip_cidr_range: 10.2.0.0/24
psc: true

Custom Routes

VPC routes can be configured through the routes variable.

locals {
  route_types = {
    gateway    = "global/gateways/default-internet-gateway"
    instance   = "zones/europe-west1-b/test"
    ip         = "192.168.0.128"
    ilb        = "regions/europe-west1/forwardingRules/test"
    vpn_tunnel = "regions/europe-west1/vpnTunnels/foo"
  }
}

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  for_each   = local.route_types
  project_id = "my-project"
  name       = "my-network-with-route-${replace(each.key, "_", "-")}"
  routes = {
    next-hop = {
      description   = "Route to internal range."
      dest_range    = "192.168.128.0/24"
      tags          = null
      next_hop_type = each.key
      next_hop      = each.value
    }
    gateway = {
      dest_range    = "0.0.0.0/0",
      priority      = 100
      tags          = ["tag-a"]
      next_hop_type = "gateway",
      next_hop      = "global/gateways/default-internet-gateway"
    }
  }
  create_googleapis_routes = null
}
# tftest modules=5 resources=15 inventory=routes.yaml

Private Google Access routes

By default the VPC module creates IPv4 routes for the Private Google Access ranges. This behavior can be controlled through the create_googleapis_routes variable:

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-vpc"
  create_googleapis_routes = {
    restricted   = false
    restricted-6 = true
    private      = false
    private-6    = true
  }
}
# tftest modules=1 resources=3 inventory=googleapis.yaml

Allow Firewall Policy to be evaluated before Firewall Rules

module "vpc" {
  source                            = "./fabric/modules/net-vpc"
  project_id                        = "my-project"
  name                              = "my-network"
  firewall_policy_enforcement_order = "BEFORE_CLASSIC_FIREWALL"
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "production"
      region        = "europe-west1"
      secondary_ip_ranges = {
        pods     = "172.16.0.0/20"
        services = "192.168.0.0/24"
      }
    },
    {
      ip_cidr_range = "10.0.16.0/24"
      name          = "production"
      region        = "europe-west2"
    }
  ]
}
# tftest modules=1 resources=5 inventory=firewall_policy_enforcement_order.yaml

IPv6

A non-overlapping private IPv6 address space can be configured for the VPC via the ipv6_config variable. If an internal range is not specified, a unique /48 ULA prefix from the fd20::/20 range is assigned.

module "vpc" {
  source     = "./fabric/modules/net-vpc"
  project_id = "my-project"
  name       = "my-network"
  ipv6_config = {
    # internal_range is optional
    enable_ula_internal = true
    internal_range      = "fd20:6b2:27e5:0:0:0:0:0/48"
  }
  subnets = [
    {
      ip_cidr_range = "10.0.0.0/24"
      name          = "test"
      region        = "europe-west1"
      ipv6          = {}
    },
    {
      ip_cidr_range = "10.0.1.0/24"
      name          = "test"
      region        = "europe-west3"
      ipv6 = {
        access_type = "EXTERNAL"
      }
    }
  ]
}
# tftest modules=1 resources=5 inventory=ipv6.yaml

Variables

name	description	type	required	default
name	The name of the network being created.	`string`	✓
project_id	The ID of the project where this VPC will be created.	`string`	✓
auto_create_subnetworks	Set to true to create an auto mode subnet, defaults to custom mode.	`bool`		`false`
create_googleapis_routes	Toggle creation of googleapis private/restricted routes. Disabled when vpc creation is turned off, or when set to null.	`object({…})`		`{}`
delete_default_routes_on_create	Set to true to delete the default routes at creation time.	`bool`		`false`
description	An optional description of this resource (triggers recreation on change).	`string`		`"Terraform-managed."`
dns_policy	DNS policy setup for the VPC.	`object({…})`		`null`
factories_config	Paths to data files and folders that enable factory functionality.	`object({…})`		`null`
firewall_policy_enforcement_order	Order that Firewall Rules and Firewall Policies are evaluated. Can be either 'BEFORE_CLASSIC_FIREWALL' or 'AFTER_CLASSIC_FIREWALL'.	`string`		`"AFTER_CLASSIC_FIREWALL"`
ipv6_config	Optional IPv6 configuration for this network.	`object({…})`		`{}`
mtu	Maximum Transmission Unit in bytes. The minimum value for this field is 1460 (the default) and the maximum value is 1500 bytes.	`number`		`null`
peering_config	VPC peering configuration.	`object({…})`		`null`
psa_config	The Private Service Access configuration for Service Networking.	`object({…})`		`null`
routes	Network routes, keyed by name.	`map(object({…}))`		`{}`
routing_mode	The network routing mode (default 'GLOBAL').	`string`		`"GLOBAL"`
shared_vpc_host	Enable shared VPC for this project.	`bool`		`false`
shared_vpc_service_projects	Shared VPC service projects to register with this host.	`list(string)`		`[]`
subnets	Subnet configuration.	`list(object({…}))`		`[]`
subnets_proxy_only	List of proxy-only subnets for Regional HTTPS or Internal HTTPS load balancers. Note: Only one proxy-only subnet for each VPC network in each region can be active.	`list(object({…}))`		`[]`
subnets_psc	List of subnets for Private Service Connect service producers.	`list(object({…}))`		`[]`
vpc_create	Create VPC. When set to false, uses a data source to reference existing VPC.	`bool`		`true`

Outputs

name	description	sensitive
id	Fully qualified network id.
internal_ipv6_range	ULA range.
name	Network name.
network	Network resource.
project_id	Project ID containing the network. Use this when you need to create resources after the VPC is fully set up (e.g. subnets created, shared VPC service projects attached, Private Service Networking configured).
self_link	Network self link.
subnet_ids	Map of subnet IDs keyed by name.
subnet_ips	Map of subnet address ranges keyed by name.
subnet_ipv6_external_prefixes	Map of subnet external IPv6 prefixes keyed by name.
subnet_regions	Map of subnet regions keyed by name.
subnet_secondary_ranges	Map of subnet secondary ranges keyed by name.
subnet_self_links	Map of subnet self links keyed by name.
subnets	Subnet resources.
subnets_proxy_only	L7 ILB or L7 Regional LB subnet resources.
subnets_psc	Private Service Connect subnet resources.

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net-vpc

net-vpc

README.md

VPC module

Examples

Simple VPC

Subnet Options

Subnet IAM

Peering

Shared VPC

Private Service Networking

Private Service Networking with peering routes and peered Cloud DNS domains

Subnets for Private Service Connect, Proxy-only subnets

DNS Policies

Subnet Factory

Custom Routes

Private Google Access routes

Allow Firewall Policy to be evaluated before Firewall Rules

IPv6

Variables

Outputs

Files

net-vpc

Directory actions

More options

Directory actions

More options

Latest commit

History

net-vpc

Folders and files

parent directory

README.md

VPC module

Examples

Simple VPC

Subnet Options

Subnet IAM

Peering

Shared VPC

Private Service Networking

Private Service Networking with peering routes and peered Cloud DNS domains

Subnets for Private Service Connect, Proxy-only subnets

DNS Policies

Subnet Factory

Custom Routes

Private Google Access routes

Allow Firewall Policy to be evaluated before Firewall Rules

IPv6

Variables

Outputs