Buildpacks for source-based deployment in GCP - Mini Project: Build & Apply

Buildpacks for source-based deployment

📖 Scenario: You are a developer who wants to deploy a simple web application to Google Cloud Platform (GCP) using Cloud Buildpacks. Buildpacks automatically detect your source code language and create a container image without writing a Dockerfile.This project will guide you through setting up a source repository, configuring buildpacks deployment, and completing the deployment process.

🎯 Goal: Deploy a source-based application to Google Cloud Run using Buildpacks. You will create the source code folder, configure the build command with buildpacks, and deploy the container image to Cloud Run.

📋 What You'll Learn

Create a source folder with a simple web application file

Set a buildpack builder variable for the build process

Use the gcloud buildpacks build command to build the container image

Deploy the built container image to Cloud Run with proper service name and region

💡 Why This Matters

🌍 Real World

Buildpacks simplify containerizing applications by detecting language and dependencies automatically, speeding up deployment without writing Dockerfiles.

💼 Career

Many cloud engineers and developers use buildpacks to streamline CI/CD pipelines and deploy apps quickly on platforms like Google Cloud Run.

1

Create source folder with app file

Create a folder called myapp and inside it create a file named app.py with the following simple Python web server code.

GCP

# Create folder myapp and file app.py with simple web server
# Your code here

Need a hint?

Use your file explorer or terminal commands to create the folder and file. The file should contain the simple HTTP server code starting with import os and including Hello from Buildpacks!.

2

Set buildpack builder variable

Create a variable called BUILDER and set it to the string gcr.io/buildpacks/builder:v1 which is the official Google Cloud Buildpacks builder image.

GCP

myapp/app.py
import os
import socketserver
from http.server import BaseHTTPRequestHandler

class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/plain')
        self.end_headers()
        self.wfile.write(b'Hello from Buildpacks!')

PORT = int(os.environ.get('PORT', 8080))
with socketserver.TCPServer(('0.0.0.0', PORT), Handler) as httpd:
    httpd.serve_forever()

# Set BUILDER variable to 'gcr.io/buildpacks/builder:v1'
# Your code here

Need a hint?

Assign the string 'gcr.io/buildpacks/builder:v1' exactly to the variable BUILDER with no spaces around the =.

3

Build container image using buildpacks

Write the gcloud command to build a container image named gcr.io/my-project/myapp from the myapp folder using the buildpack builder stored in BUILDER. Use the command gcloud builds submit --pack with the --builder flag.

GCP

myapp/app.py
import os
import socketserver
from http.server import BaseHTTPRequestHandler

class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/plain')
        self.end_headers()
        self.wfile.write(b'Hello from Buildpacks!')

PORT = int(os.environ.get('PORT', 8080))
with socketserver.TCPServer(('0.0.0.0', PORT), Handler) as httpd:
    httpd.serve_forever()

BUILDER='gcr.io/buildpacks/builder:v1'

# Build container image with gcloud builds submit --pack and --builder
# Your code here

Need a hint?

Use gcloud builds submit with the --pack flag and specify the builder with --builder $BUILDER. Tag the image as gcr.io/my-project/myapp.

4

Deploy container image to Cloud Run

Write the gcloud command to deploy the container image gcr.io/my-project/myapp to Cloud Run service named myapp-service in region us-central1. Use the gcloud run deploy command with --image, --region, and --platform managed flags.

GCP

myapp/app.py
import os
import socketserver
from http.server import BaseHTTPRequestHandler

class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/plain')
        self.end_headers()
        self.wfile.write(b'Hello from Buildpacks!')

PORT = int(os.environ.get('PORT', 8080))
with socketserver.TCPServer(('0.0.0.0', PORT), Handler) as httpd:
    httpd.serve_forever()

BUILDER='gcr.io/buildpacks/builder:v1'

gcloud builds submit myapp --tag gcr.io/my-project/myapp --pack --builder $BUILDER

# Deploy to Cloud Run with gcloud run deploy
# Your code here

Need a hint?

Use gcloud run deploy with the service name myapp-service, specify the image, region, and platform managed.