2-environments

2-environments

This repo is part of a multi-part guide that shows how to configure and deploy the example.com reference architecture described in Google Cloud security foundations guide. The following table lists the parts of the guide.

0-bootstrap	Bootstraps a Google Cloud organization, creating all the required resources and permissions to start using the Cloud Foundation Toolkit (CFT). This step also configures a CI/CD Pipeline for foundations code in subsequent stages.
1-org	Sets up top level shared folders, networking projects, and organization-level logging, and sets baseline security settings through organizational policy.
2-environments (this file)	Sets up development, nonproduction, and production environments within the Google Cloud organization that you've created.
3-networks-dual-svpc	Sets up base and restricted shared VPCs with default DNS, NAT (optional), Private Service networking, VPC service controls, on-premises Dedicated Interconnect, and baseline firewall rules for each environment. It also sets up the global DNS hub.
3-networks-hub-and-spoke	Sets up base and restricted shared VPCs with all the default configuration found on step 3-networks-dual-svpc, but here the architecture will be based on the Hub and Spoke network model. It also sets up the global DNS hub
4-projects	Sets up a folder structure, projects, and application infrastructure pipeline for applications, which are connected as service projects to the shared VPC created in the previous stage.
5-app-infra	Deploy a simple Compute Engine instance in one of the business unit projects using the infra pipeline set up in 4-projects.

For an overview of the architecture and the parts, see the terraform-example-foundation README.

Purpose

The purpose of this step is to setup development, nonproduction, and production environments within the Google Cloud organization that you've created.

Prerequisites

1. 0-bootstrap executed successfully.
2. 1-org executed successfully.

Troubleshooting

Please refer to troubleshooting if you run into issues during this step.

Assured Workloads

To enable Assured Workloads in the production folder, edit the main.tf file and update assured_workload_configuration.enable to true.

See the env_baseline module README.md file for additional information on the values that can be configured for the Workload.

Assured Workload is a paid service. FedRAMP Moderate workloads can be deployed at no additional charge to Google Cloud products and service usage. For other compliance regimes, see Assured Workloads pricing.

If you enable Assured Workloads, to delete the Assured workload, you will need to manually delete the resources under it. Use the GCP console to identify the resources to be deleted.

Usage

Note: If you are using MacOS, replace cp -RT with cp -R in the relevant commands. The -T flag is needed for Linux, but causes problems for MacOS.

Deploying with Cloud Build

1. Clone the gcp-environments repo based on the Terraform output from the 0-bootstrap step. Clone the repo at the same level of the terraform-example-foundation folder, the following instructions assume this layout. Run terraform output cloudbuild_project_id in the 0-bootstrap folder to get the Cloud Build Project ID.

   export CLOUD_BUILD_PROJECT_ID=$(terraform -chdir="terraform-example-foundation/0-bootstrap/" output -raw cloudbuild_project_id)
   echo ${CLOUD_BUILD_PROJECT_ID}
   
   gcloud source repos clone gcp-environments --project=${CLOUD_BUILD_PROJECT_ID}

2. Navigate into the repo, change to the non-main branch and copy contents of foundation to new repo. All subsequent steps assume you are running them from the gcp-environments directory. If you run them from another directory, adjust your copy paths accordingly.

   cd gcp-environments
   git checkout -b plan
   
   cp -RT ../terraform-example-foundation/2-environments/ .
   cp ../terraform-example-foundation/build/cloudbuild-tf-* .
   cp ../terraform-example-foundation/build/tf-wrapper.sh .
   chmod 755 ./tf-wrapper.sh

3. Rename terraform.example.tfvars to terraform.tfvars.

   mv terraform.example.tfvars terraform.tfvars

4. Update the file with values from your environment and bootstrap (you can re-run terraform output in the 0-bootstrap directory to find these values). See any of the envs folder README.md files for additional information on the values in the terraform.tfvars file.

   export backend_bucket=$(terraform -chdir="../terraform-example-foundation/0-bootstrap/" output -raw gcs_bucket_tfstate)
   echo "remote_state_bucket = ${backend_bucket}"
   
   sed -i'' -e "s/REMOTE_STATE_BUCKET/${backend_bucket}/" terraform.tfvars

5. Commit changes.

   git add .
   git commit -m 'Initialize environments repo'

6. Push your plan branch to trigger a plan for all environments. Because the plan branch is not a named environment branch, pushing your plan branch triggers terraform plan but not terraform apply.

   git push --set-upstream origin plan

7. Review the plan output in your cloud build project https://console.cloud.google.com/cloud-build/builds;region=DEFAULT_REGION?project=YOUR_CLOUD_BUILD_PROJECT_ID

8. Merge changes to development branch. Because this is a named environment branch, pushing to this branch triggers both terraform plan and terraform apply.

   git checkout -b development
   git push origin development

9. Review the apply output in your cloud build project https://console.cloud.google.com/cloud-build/builds;region=DEFAULT_REGION?project=YOUR_CLOUD_BUILD_PROJECT_ID

10. Merge changes to nonproduction. Because this is a named environment branch, pushing to this branch triggers both terraform plan and terraform apply. Review the apply output in your cloud build project https://console.cloud.google.com/cloud-build/builds;region=DEFAULT_REGION?project=YOUR_CLOUD_BUILD_PROJECT_ID

    git checkout -b nonproduction
    git push origin nonproduction

11. Merge changes to production branch. Because this is a named environment branch, pushing to this branch triggers both terraform plan and terraform apply. Review the apply output in your cloud build project https://console.cloud.google.com/cloud-build/builds;region=DEFAULT_REGION?project=YOUR_CLOUD_BUILD_PROJECT_ID

    git checkout -b production
    git push origin production

12. You can now move to the instructions in the network step. To use the Dual Shared VPC network mode go to 3-networks-dual-svpc, or go to 3-networks-hub-and-spoke to use the Hub and Spoke network mode.

Deploying with Jenkins

See 0-bootstrap README-Jenkins.md.

Deploying with GitHub Actions

See 0-bootstrap README-GitHub.md.

Run Terraform locally

1. The next instructions assume that you are at the same level of the terraform-example-foundation folder. Change into 2-environments folder, copy the Terraform wrapper script and ensure it can be executed.

   cd terraform-example-foundation/2-environments
   cp ../build/tf-wrapper.sh .
   chmod 755 ./tf-wrapper.sh

2. Rename terraform.example.tfvars to terraform.tfvars.

   mv terraform.example.tfvars terraform.tfvars

3. Update the file with values from your environment and 0-bootstrap output.See any of the envs folder README.md files for additional information on the values in the terraform.tfvars file.

4. Use terraform output to get the backend bucket value from 0-bootstrap output.

   export backend_bucket=$(terraform -chdir="../0-bootstrap/" output -raw gcs_bucket_tfstate)
   echo "remote_state_bucket = ${backend_bucket}"
   
   sed -i'' -e "s/REMOTE_STATE_BUCKET/${backend_bucket}/" ./terraform.tfvars

We will now deploy each of our environments(development/production/nonproduction) using this script. When using Cloud Build or Jenkins as your CI/CD tool each environment corresponds to a branch is the repository for 2-environments step and only the corresponding environment is applied.

To use the validate option of the tf-wrapper.sh script, please follow the instructions to install the terraform-tools component.

1. Use terraform output to get the Cloud Build project ID and the environment step Terraform Service Account from 0-bootstrap output. An environment variable GOOGLE_IMPERSONATE_SERVICE_ACCOUNT will be set using the Terraform Service Account to enable impersonation.

   export CLOUD_BUILD_PROJECT_ID=$(terraform -chdir="../0-bootstrap/" output -raw cloudbuild_project_id)
   echo ${CLOUD_BUILD_PROJECT_ID}
   
   export GOOGLE_IMPERSONATE_SERVICE_ACCOUNT=$(terraform -chdir="../0-bootstrap/" output -raw environment_step_terraform_service_account_email)
   echo ${GOOGLE_IMPERSONATE_SERVICE_ACCOUNT}

2. Run init and plan and review output for environment development.

   ./tf-wrapper.sh init development
   ./tf-wrapper.sh plan development

3. Run validate and check for violations.

   ./tf-wrapper.sh validate development $(pwd)/../policy-library ${CLOUD_BUILD_PROJECT_ID}

4. Run apply development.

   ./tf-wrapper.sh apply development

5. Run init and plan and review output for environment nonproduction.

   ./tf-wrapper.sh init nonproduction
   ./tf-wrapper.sh plan nonproduction

6. Run validate and check for violations.

   ./tf-wrapper.sh validate nonproduction $(pwd)/../policy-library ${CLOUD_BUILD_PROJECT_ID}

7. Run apply nonproduction.

   ./tf-wrapper.sh apply nonproduction

8. Run init and plan and review output for environment production.

   ./tf-wrapper.sh init production
   ./tf-wrapper.sh plan production

9. Run validate and check for violations.

   ./tf-wrapper.sh validate production $(pwd)/../policy-library ${CLOUD_BUILD_PROJECT_ID}

10. Run apply production.

    ./tf-wrapper.sh apply production

If you received any errors or made any changes to the Terraform config or terraform.tfvars you must re-run ./tf-wrapper.sh plan <env> before running ./tf-wrapper.sh apply <env>.

Before executing the next stages, unset the GOOGLE_IMPERSONATE_SERVICE_ACCOUNT environment variable.

unset GOOGLE_IMPERSONATE_SERVICE_ACCOUNT