Configure connectors in the Shared VPC host project

Console

1. Go to the Google Cloud console dashboard.

   Go to Google Cloud console dashboard

2. In the menu bar at the top of the dashboard, click the project dropdown menu and select the host project.

gcloud

Set the default project in the gcloud CLI to the host project by running the following in your terminal:

gcloud config set project HOST_PROJECT_ID

Replace the following:

• HOST_PROJECT_ID: the ID of the Shared VPC host project

Console

1. Enable the Serverless VPC Access API for your project.

   Enable API

2. Go to the Serverless VPC Access overview page.

   Go to Serverless VPC Access

3. Click Create connector.

4. In the Name field, enter a name for your connector. The name must follow the Compute Engine naming convention and be less than 21 characters. Hyphens (-) count as two characters.

5. In the Region field, select a region for your connector. This must match the region of your serverless service.

   If your service is in the region us-central or europe-west, use us-central1 or europe-west1.

6. In the Network field, select the VPC network to attach your connector to.

7. Click the Subnetwork pulldown menu:

   Select an unused /28 subnet.

   • Subnets must be used exclusively by the connector. They cannot be used by other resources such as VMs, Private Service Connect, or load balancers.
   • To confirm that your subnet is not used for Private Service Connect or Cloud Load Balancing, check that the subnet purpose is PRIVATE by running the following command in the gcloud CLI:

     gcloud compute networks subnets describe SUBNET_NAME
     

     Replace SUBNET_NAME with the name of your subnet.

8. (Optional) To set scaling options for additional control over the connector, click Show Scaling Settings to display the scaling form.

   1. Set the minimum and maximum number of instances for your connector, or use the defaults, which are 2 (min) and 10 (max). The connector scales out to the maximum specified as traffic increases, but the connector does not scale back in when traffic decreases. You must use values between 2 and 10, and the MIN value must be less than the MAX value.
   2. In the Instance Type pulldown menu, choose the machine type to be used for the connector, or use the default e2-micro. Notice the cost sidebar on the right when you choose the instance type, which displays bandwidth and cost estimations.

9. Click Create.

10. A green check mark will appear next to the connector's name when it is ready to use.

gcloud

1. Update gcloud components to the latest version:

   gcloud components update
   

2. Enable the Serverless VPC Access API for your project:

   gcloud services enable vpcaccess.googleapis.com
   

3. Create a Serverless VPC Access connector:

   gcloud compute networks vpc-access connectors create CONNECTOR_NAME \
   --region=REGION \
   --subnet=SUBNET \
   --subnet-project=HOST_PROJECT_ID \
   # Optional: specify minimum and maximum instance values between 2 and 10, default is 2 min, 10 max.
   --min-instances=MIN \
   --max-instances=MAX \
   # Optional: specify machine type, default is e2-micro
   --machine-type=MACHINE_TYPE

   Replace the following:

   • CONNECTOR_NAME: a name for your connector. The name must follow the Compute Engine naming convention and be less than 21 characters. Hyphens (-) count as two characters.
   • REGION: a region for your connector; this must match the region of your serverless service. If your service is in the region us-central or europe-west, use us-central1 or europe-west1.
   • SUBNET: the name of an unused /28 subnet.
     • Subnets must be used exclusively by the connector. They cannot be used by other resources such as VMs, Private Service Connect, or load balancers.
     • To confirm that your subnet is not used for Private Service Connect or Cloud Load Balancing, check that the subnet purpose is PRIVATE by running the following command in the gcloud CLI:

       gcloud compute networks subnets describe SUBNET_NAME
       

       Replace the following:
       • SUBNET_NAME: the name of your subnet
   • HOST_PROJECT_ID: the ID of the host project
   • MIN: the minimum number of instances to use for the connector. Use an integer between 2 and 9. Default is 2. To learn about connector scaling, see Throughput and scaling.
   • MAX: the maximum number of instances to use for the connector. Use an integer between 3 and 10. Default is 10. If traffic requires it, the connector scales out to [MAX] instances, but does not scale back in. To learn about connector scaling, see Throughput and scaling.
   • MACHINE_TYPE: f1-micro, e2-micro, or e2-standard-4. To learn about connector throughput, including machine type and scaling, see Throughput and scaling.

   For more details and optional arguments, see the gcloud reference.

4. Verify that your connector is in the READY state before using it:

   gcloud compute networks vpc-access connectors describe CONNECTOR_NAME \
   --region=REGION

   Replace the following:

   • CONNECTOR_NAME: the name of your connector; this is the name that you specified in the previous step
   • REGION: the region of your connector; this is the region that you specified in the previous step

   The output should contain the line state: READY.

Terraform

You can use a Terraform resource to enable the vpcaccess.googleapis.com API.

resource "google_project_service" "vpcaccess-api" {
  project = var.project_id # Replace this with your project ID in quotes
  service = "vpcaccess.googleapis.com"
}

You can use Terraform modules to create a VPC network and subnet and then create the connector.

module "test-vpc-module" {
  source       = "terraform-google-modules/network/google"
  version      = "~> 9.0"
  project_id   = var.project_id # Replace this with your project ID in quotes
  network_name = "my-serverless-network"
  mtu          = 1460

  subnets = [
    {
      subnet_name   = "serverless-subnet"
      subnet_ip     = "10.10.10.0/28"
      subnet_region = "us-central1"
    }
  ]
}

module "serverless-connector" {
  source     = "terraform-google-modules/network/google//modules/vpc-serverless-connector-beta"
  version    = "~> 9.0"
  project_id = var.project_id
  vpc_connectors = [{
    name        = "central-serverless"
    region      = "us-central1"
    subnet_name = module.test-vpc-module.subnets["us-central1/serverless-subnet"].name
    # host_project_id = var.host_project_id # Specify a host_project_id for shared VPC
    machine_type  = "e2-standard-4"
    min_instances = 2
    max_instances = 7
    }
    # Uncomment to specify an ip_cidr_range
    #   , {
    #     name          = "central-serverless2"
    #     region        = "us-central1"
    #     network       = module.test-vpc-module.network_name
    #     ip_cidr_range = "10.10.11.0/28"
    #     subnet_name   = null
    #     machine_type  = "e2-standard-4"
    #     min_instances = 2
    #   max_instances = 7 }
  ]
  depends_on = [
    google_project_service.vpcaccess-api
  ]
}

Console

1. Open the IAM page.

   Go to IAM

2. Click the project dropdown menu and select the host project.

3. Click Add.

4. In the New principals field, add the principal that deploys your App Engine service.

5. In the Role field, select Serverless VPC Access User.

6. Click Save.

gcloud

Run the following in your terminal:

gcloud projects add-iam-policy-binding HOST_PROJECT_ID \
--member=PRINCIPAL \
--role=roles/vpcaccess.user

Replace the following:

• HOST_PROJECT_ID: the ID of the Shared VPC host project
• PRINCIPAL: the principal that deploys your App Engine service. Learn more about the --member flag.

Console

1. Open the IAM page.

   Go to IAM

2. Click the project dropdown menu and select the host project.

3. Click Add.

4. In the New principals field, enter the email address of the principal that should be able to see the connector from the service project. You can enter multiple emails in this field.

5. In the Role field, select Serverless VPC Access Viewer.

6. Click Save.

gcloud

Run the following in your terminal:

gcloud projects add-iam-policy-binding HOST_PROJECT_ID \
--member=PRINCIPAL \
--role=roles/vpcaccess.viewer

Replace the following:

• HOST_PROJECT_ID: the ID of the Shared VPC host project
• PRINCIPAL: the principal who deploys App Engine services. Learn more about the --member flag.

Console

1. Open the IAM page.

   Go to IAM

2. Click the project dropdown menu and select the service project.

3. Click Add.

4. In the New principals field, enter the email address of the principal that should be able to see the connector from the service project. You can enter multiple emails in this field.

5. In the Role field, select Compute Network Viewer.

6. Click Save.

gcloud

Run the following in your terminal:

gcloud projects add-iam-policy-binding SERVICE_PROJECT_ID \
--member=PRINCIPAL \
--role=roles/compute.networkViewer

Replace the following:

• SERVICE_PROJECT_ID: the ID of the service project
• PRINCIPAL: the principal who deploys App Engine services. Learn more about the --member flag.