Deploying Ops Manager on GCP Using Terraform

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This guide describes the preparation steps required to install Ops Manager on Google Cloud Platform (GCP) using Terraform templates.

The Terraform template for Ops Manager on GCP describes a set of GCP resources and properties. For more information about how Terraform creates resources in GCP, see Google Cloud Provider on the Terraform site.

You may also find it helpful to review different deployment options in Reference Architecture for Ops Manager on GCP.

Prerequisites

In addition to fulfilling the prerequisites listed in Installing Ops Manager on GCP, ensure you have the following:

• The Terraform CLI
• The Google Cloud SDK
• In your GCP project, enable the following APIs:
  • Identity and Access Management
  • Cloud Resource Manager
  • Cloud DNS
  • Cloud SQL API
  • Compute Engine API

Step 1: Obtain a GCP Service Account Key File

To use the Terraform templates to create the necessary infrastructure resources for Ops Manager, you need a service account key file.

To create an account key file, follow the procedure below corresponding to your own use case.

• I already have a service account I want to use:
1. Navigate to the GCP console.
2. Select IAM and locate your service account.
3. From the Options column, open the dropdown and click Create Key.
• I want to create a new service account:
1. Open a terminal window.
2. To create a service account using the gcloud CLI, run the following command:

gcloud iam service-accounts create ACCOUNT-NAME

3. To create a key file for your service account, run the following command:

gcloud iam service-accounts keys create "terraform.key.json" --iam-account "ACCOUNT-NAME@PROJECT-ID.iam.gserviceaccount.com"

4. To bind the service account to your project and give it the owner role, run the following command:

gcloud projects add-iam-policy-binding PROJECT-ID --member 'serviceAccount:ACCOUNT-NAME@PROJECT-ID.iam.gserviceaccount.com' --role 'roles/owner'


Where:
• ACCOUNT-NAME is the name you want to apply to the new account.
• PROJECT-ID is your Google Cloud Platform Project ID.

Step 2: Download Templates and Edit Variables File

Before you can run Terraform commands to provision infrastructure resources, you must download the GCP Terraform Templates and create a Terraform template variables file as described below:

1. On VMware Tanzu Network, navigate to the VMware Tanzu Application Service for VMs (TAS for VMs) release.

2. Download the GCP Terraform ZIP file.

3. Extract the contents of the ZIP file.

4. Move the extracted folder to the workspace directory on your local machine.

5. On the command line, navigate to the directory. For example:

   $ cd ~/workspace/pivotal-cf-terraforming-gcp
   

6. Navigate to the terraforming-pas or terraforming-pks directory that contains the Terraform files for your runtime.

7. In the runtime directory, create a text file named terraform.tfvars.

8. Open the terraform.tfvars file and add the following:

   Note: Ensure that you insert a new line at the end of the file.

   env_name         = "YOUR-ENVIRONMENT-NAME"
   opsman_image_url = "YOUR-OPS-MAN-IMAGE-URL"
   region           = "YOUR-GCP-REGION"
   zones            = ["YOUR-AZ-1", "YOUR-AZ-2", "YOUR-AZ-3"]
   project          = "YOUR-GCP-PROJECT"
   dns_suffix       = "YOUR-DNS-SUFFIX"
   
   ssl_cert = <<SSL_CERT
   -----BEGIN CERTIFICATE-----
   YOUR-CERTIFICATE
   -----END CERTIFICATE-----
   SSL_CERT
   
   ssl_private_key = <<SSL_KEY
   -----BEGIN EXAMPLE RSA PRIVATE KEY-----
   YOUR-PRIVATE-KEY
   -----END EXAMPLE RSA PRIVATE KEY-----
   SSL_KEY
   
   service_account_key = <<SERVICE_ACCOUNT_KEY
   YOUR-KEY-JSON
   SERVICE_ACCOUNT_KEY
   
   

9. Edit the values in the file according to the table below.

   Value to replace	Guidance
   YOUR-ENVIRONMENT-NAME	Enter a name to use to identify resources in GCP. Terraform prepends the names of the resources it creates with this environment name. Example: pcf.
   YOUR-OPS-MAN-IMAGE-URL	Enter the source URL of the Ops Manager image you want to boot. You can find this URL in the PDF included with the Ops Manager release on VMware Tanzu Network. To prevent the creation of an Ops Manager VM, set this value to an empty string (""). When using Platform Automation, you must disable the creation of the Ops Manager VM from Terraform. For more information, see Platform Automation.
   YOUR-GCP-REGION	Enter the name of the GCP region in which you want Terraform to create resources. Example: us-central1.
   YOUR-AZ-1 YOUR-AZ-2 YOUR-AZ-3	Enter three availability zones from your region. Example: us-central1-a, us-central1-b, us-central1-c.
   YOUR-GCP-PROJECT	Enter the name of the GCP project in which you want Terraform to create resources.
   YOUR-DNS-SUFFIX	Enter a domain name to use as part of the system domain for your Ops Manager deployment. Terraform creates DNS records in GCP using YOUR-ENVIRONMENT-NAME and YOUR-DNS-SUFFIX. For example, if you enter example.com for your DNS suffix and have pcf as your environment name, Terraform creates DNS records at pcf.example.com.
   YOUR-CERTIFICATE	Enter a certificate to use for HTTP load balancing. For production environments, use a certificate from a Certificate Authority (CA). For test environments, you can use a self-signed certificate. Your certificate must specify your system domain as the common name. Your system domain is YOUR-ENVIRONMENT-NAME.YOUR-DNS-SUFFIX. It also must include the following subdomains: *.sys.YOUR-SYSTEM-DOMAIN, *.login.sys.YOUR-SYSTEM-DOMAIN, *.uaa.sys.YOUR-SYSTEM-DOMAIN, *.apps.YOUR-SYSTEM-DOMAIN.
   YOUR-PRIVATE-KEY	Enter a private key for the certificate you entered.
   YOUR-KEY-JSON	Enter the contents of your service account key file. This file is in JSON format.

Step 3: Add Optional Variables

Complete this step if you want to do any of the following:

• Change the default CIDR ranges
• Deploy the Isolation Segment tile
• Use an external Google Cloud SQL database
• Use external Google Storage buckets
• Disable generated GCP service account key for blobstore

In your terraform.tfvars file, specify the appropriate variables from the sections below.

Note: You can see the configurable options by opening the variables.tf file and looking for variables with default values.

CIDR Ranges for Subnets

If you want to change the CIDR ranges for the infrastructure, your runtime, or services networks that Terraform creates, add the following variables to your terraform.tfvars file, replacing YOUR-INFRASTRUCTURE-CIDR, YOUR-RUNTIME-CIDR and YOUR-SERVICES-CIDR with your desired values.

infrastructure_cidr = YOUR-INFRASTRUCTURE-CIDR
pas_cidr = YOUR-RUNTIME-CIDR
services_cidr = YOUR-SERVICES-CIDR

Isolation Segments

If you plan to deploy the Isolation Segment tile, add the following variables to your terraform.tfvars file, replacing YOUR-CERTIFICATE and YOUR-PRIVATE-KEY with a certificate and private key. This causes Terraform to create an additional HTTP load balancer across three availability zones to use for the Isolation Segment tile.

isolation_segment = true
iso_seg_ssl_cert = <<ISO_SEG_SSL_CERT
-----BEGIN CERTIFICATE-----
YOUR-CERTIFICATE
-----END CERTIFICATE-----
ISO_SEG_SSL_CERT
iso_seg_ssl_cert_private_key = <<ISO_SEG_SSL_KEY
-----BEGIN EXAMPLE RSA PRIVATE KEY-----
YOUR-PRIVATE-KEY
-----END EXAMPLE RSA PRIVATE KEY-----
ISO_SEG_SSL_KEY

External Database

1. If you want to use an external Google Cloud SQL database for Ops Manager and TAS for VMs, add the following to your terraform.tfvars file:

   external_database = true
   

2. If you want to specify a single host from which users can connect to the Ops Manager and runtime databases, add the following to your terraform.tfvars file.

   opsman_sql_db_host = HOST-IP-ADDRESS
   pas_sql_db_host = HOST-IP-ADDRESS
   

   Where HOST-IP-ADDRESS is your desired IP address(es).

External Storage Buckets

If you want to use Google Cloud Storage buckets for the TAS for VMs Cloud Controller, add the following to your terraform.tfvars file:

create_gcs_buckets = true

GCP Service Account Key for Blobstore

If you want to provide your own service account for blob storage instead of using a generated service account, add the following to your terraform.tfvars file:

create_blobstore_service_account_key = false

Step 4: Create GCP Resources with Terraform

Follow these steps to use the Terraform CLI to create resources on GCP:

1. From the directory that contains the Terraform files, run the following command to initialize the directory based on the information you specified in the terraform.tfvars file.

   terraform init

2. Run the following command to create the execution plan for Terraform.

   terraform plan -out=plan

3. To execute the plan from the previous step, run the following command:

   terraform apply plan

   Note: It may take several minutes for Terraform to create all the resources in GCP.

Step 5: Create DNS Record

1. In a browser, navigate to the DNS provider for the DNS suffix you entered in your terraform.tfvars file.

2. Create a new NS (Name server) record for your Ops Manager system domain. Your system domain is YOUR-ENVIRONMENT-NAME.YOUR-DNS-SUFFIX.

   1. In this record, enter the name servers included in env_dns_zone_name_servers from your Terraform output.

Next Steps

After you complete this procedure, follow the instructions in Configuring BOSH Director on GCP Using Terraform.