Terraform GCP VPC & GKE

This repository provisions infrastructure on Google Cloud Platform (GCP) using Terraform. It sets up a Virtual Private Cloud (VPC) and a Google Kubernetes Engine (GKE) cluster with modular, parameterized support and CI/CD automation via Jenkins.

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⚙️ Features

• Modular design with vpc and gke Terraform modules
• Supports multiple backend types: remote, gcs, s3, azurerm
• Jenkinsfile for automated provisioning and destruction
• Quick setup for repeatable infrastructure deployments on GCP

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🚀 Quick Deployment Steps

1. Clone the repository

2. Change into the project directory

3. Initialize Terraform with a backend config
   terraform init -backend-config=<path-to-backend-config-file>

4. Preview infrastructure changes
   terraform plan -var-file=<path-to-var-file>

5. Apply the configuration
   terraform apply -var-file=<path-to-var-file>

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🤖 Configure with Jenkins

This project includes a Jenkinsfile with parameterized deployment options:

• Select backend type: remote, gcs, s3, azurerm
• Choose execution mode: local or remote (Terraform Cloud)
• Input backend config and variable files
• Toggle destroy mode for cleanup

Jenkins Setup Steps

1. Create a new Jenkins pipeline job
2. Point it to this GitHub repository
3. Configure the following parameters:
   • BACKEND_TYPE (e.g., gcs)
   • HCP_EXEC_MODE (e.g., local)
   • BACKEND_CONFIG (e.g., gcs-staging.hcl)
   • TF_VAR_FILE (e.g., gcp.tfvars)
   • DESTROY_TERRAFORM (true/false)
4. Trigger the pipeline to deploy or destroy GCP infrastructure

Using Terraform Cloud as the Backend

1. Create an environment variable in your Terraform Cloud workspace:

   • Name: GOOGLE_CREDENTIALS

   • Value: Paste your entire GCP JSON key file without newline characters.

     To remove newlines from your JSON file, run:

     cat CREDENTIALS.json | tr -s '\n' ' '
     

   • Mark the variable as Sensitive

2. Save the variable.

3. All runs in this workspace will use the GOOGLE_CREDENTIALS environment variable to authenticate with Google Cloud Platform.

Setting GKE Credentials for kubectl

1. Install GKE Auth Plugin:

   • Ubuntu/Debian:

     sudo apt-get install google-cloud-sdk-gke-gcloud-auth-plugin -y

   • RHEL/CentOS/Amazon Linux:

     sudo yum install google-cloud-sdk-gke-gcloud-auth-plugin -y

2. Configure kubectl:

   • Get the command from the configure_kubeconfig output

     terraform output -raw configure_kubeconfig

   • Or run the following by replacing with your actual values:

     gcloud container clusters get-credentials <CLUSTER_NAME> \
            --zone <ZONE> \
            --project <PROJECT_ID>