This repository demonstrates how to deploy a simple Python Flask web application to Google Cloud Platform services, including App Engine and Cloud Run.

• ✅ Running local Python source code.
• ✅ Building and running Docker locally.
• ✅ Deploying Flask App to Cloud Run / App Engine from source.
• ✅ Deploying Flask App to App Engine using a standard instance.
• ✅ Deploying Flask App to App Engine using a flexible environment (Docker).
• ✅ Building, pushing, and deploying Flask App to Cloud Run using Cloud Build.

1. Create a local Python environment at .venv using Python 3.11 and the requirements specified in hello_app/requirements.txt.

   • TIPS: If you use VS Code, press Cmd+Shift+P, search Python: Create Environment..., and follow the prompts.
     • Select Python 3.11.xxx.xxx
     • Check the suggested requirements.txt.
     • Restart you terminal (Ctrl+Shift+).
   • Alternatively, you can use the make commands s1 and s2.

2. Set up your gcloud cli, You can find the installation steps here

3. Activate the appropriate GCP project using commands like:

   • gcloud config configurations list
   • gcloud cofig configurations activate YOUR_CONFIG_NAME

4. Run make in the terminal to view the existing rules.

   You will get a list of commands to support quick runs.

   Rule	Description
   s1_create_environment	Step 1: Create python virtual environment
   s2_requirements	Step 2: Install requirements
   s3_test	Step 3: Local Test
   s4_local_run	Step 4: Local Run
   s5_deploy_to_app_engine_from_source	Step 5: Deploy the Model to App Engine from Source
   s6_deploy_to_cloud_run_from_source	Step 6: Deploy the Model to Cloud Run from Source
   s7_local_docker_build_and_run	Step 7: Local docker build and run
   s8_deploy_to_app_engine_using_docker	Step 8: Deploy to App Engine using docker
   s9_deploy_to_cloud_run_using_docker	Step 9: Deploy to Cloud Run using docker

Note

• Find more details in makefile.
• The default COMPUTE_DEFAULT_REGION is australia-southeast1, modify the code to suit your gcloud settings.
• Remember to Enable google Cloud Run and App Engine services for s5-s9; and create service account for the best practice.

After setting the venv , start the flask app by the following cmd:

make make s4_local_run 

You should see results like

source .venv/bin/activate && python hello_app/main.py
 * Serving Flask app 'main'
 * Debug mode: off
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on all addresses (0.0.0.0)
 * Running on http:https://127.0.0.1:8080
 ...
Press CTRL+C to quit
127.0.0.1 - - [20/May/2024 10:23:42] "GET / HTTP/1.1" 200 -

You can copy and paste the following links to test the flask app:

1. Install the Google Cloud CLI
2. App Engine documentation
3. App Engine standard environment
4. App Engine Flexible Environment
5. Cloud Run documentation
6. Quickstart: Deploy a Python service to Cloud Run
7. Build applications or websites quickly on a fully managed platform
8. Cloud Build
9. Cloud Build Trigger / CI/CD
10. Deploying to Cloud Run using Cloud Build
11. Deploying to App Engine

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