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I’m trying to do a CI/CD project to deploy a Flask application on an EC2 using the aws code pipeline and github, but I’m getting the following error during Deploy step in Code Pipeline. I tried several configurations in the buildspec file and I couldn’t solve it. When accessing the EC2 directory, none of my application files are being loaded. I understand that the error is due to searching for the file and it not existing, and in fact it doesn’t exist.

My project has the following structure:

my_flask_app/
├── app.py
├── requirements.txt
├── appspec.yml
├── buildspec.yml
├── scripts/
│   ├── install_dependencies.sh
│   ├── set_permissions.sh
│   ├── start_server.sh
│   └── validate_service.sh

app.py

from flask import Flask, request, render_template_string

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def index():
    result = ''
    if request.method == 'POST':
        num1 = float(request.form.get('num1'))
        operator = request.form.get('operator')
        num2 = float(request.form.get('num2'))
        if operator == '+':
            result = num1 + num2
        elif operator == '-':
            result = num1 - num2
        elif operator == '*':
            result = num1 * num2
        elif operator == '/':
            result = num1 / num2
        else:
            result = 'Operador inválido'
    return render_template_string('''
        <!DOCTYPE html>
        <html lang="en">
        <head>
            <meta charset="UTF-8">
            <meta name="viewport" content="width=device-width, initial-scale=1.0">
            <title>Calculadora</title>
            <style>
                body {
                    font-family: Arial, sans-serif;
                    margin: 50px;
                }
                input, select {
                    margin: 5px;
                }
            </style>
        </head>
        <body>
            <h1>Calculadora Simples</h1>
            <form method="POST">
                <input type="number" name="num1" placeholder="Primeiro número" required>
                <select name="operator">
                    <option value="+">+</option>
                    <option value="-">-</option>
                    <option value="*">*</option>
                    <option value="/">/</option>
                </select>
                <input type="number" name="num2" placeholder="Segundo número" required>
                <button type="submit">Calcular</button>
            </form>
            <h2>Resultado: {{ result }}</h2>
        </body>
        </html>
    ''', result=result)

if __name__ == '__main__':
    app.run(debug=True)

buildspec.yml

version: 0.2

phases:
  install:
    runtime-versions:
      python: 3.9
    # commands:
    #   - python -m venv venv
    #   - . venv/bin/activate
    #   - pip install --upgrade pip
    #   - pip install -r requirements.txt

  pre_build:
    commands:
      - echo "Running tests..."
      - python -m pytest tests/ || true

  build:
    commands:
      - echo "Building the project..."

  post_build:
    commands:
      - echo "Build completed"

artifacts:
  files:
    - '**/*'
    - appspec.yml
    - 'scripts/**/*'
  discard-paths: true
  name: my_flask_app.zip

appspec.yaml

files:
  - source: /
    destination: /home/ubuntu/my_flask_app
hooks:
  BeforeInstall:
    - location: scripts/install_dependencies.sh
      timeout: 300
      runas: ubuntu
  AfterInstall:
    - location: scripts/set_permissions.sh
      timeout: 300
      runas: ubuntu
  ApplicationStart:
    - location: scripts/start_server.sh
      timeout: 300
      runas: ubuntu
  ValidateService:
    - location: scripts/validate_service.sh
      timeout: 300
      runas: ubuntu

EC2 created, configured with CodeDeploy Agent running:

IAM Role assigned to the instance:

The role has the following permissions:

The artifacts that are created at the stage outputs remain without format (I thought they would be .zip as configured during pipeline creation)

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Danh mục

Problems Deploying Flask Application with AWS CodePipeline and CodeDeploy