Production Deployment & DevOps

# Basic Production Deployment Script
#!/bin/bash

set -euo pipefail

# Configuration
APP_NAME="genai-service"
VERSION=${1:-latest}
ENVIRONMENT=${2:-production}

echo "🚀 Deploying $APP_NAME version $VERSION to $ENVIRONMENT"

# Pre-deployment checks
echo "🔍 Running pre-deployment checks..."

# Check if required environment variables are set
required_vars=("DATABASE_URL" "REDIS_URL" "OPENAI_API_KEY")
for var in "${required_vars[@]}"; do
    if [[ -z "${!var:-}" ]]; then
        echo "❌ Error: $var is not set"
        exit 1
    fi
done

# Test database connectivity
echo "📊 Testing database connection..."
python -c "
import os
import psycopg2
try:
    conn = psycopg2.connect(os.environ['DATABASE_URL'])
    conn.close()
    print('✅ Database connection successful')
except Exception as e:
    print(f'❌ Database connection failed: {e}')
    exit(1)
"

# Build and tag Docker image
echo "🏗️ Building Docker image..."
docker build -t $APP_NAME:$VERSION .
docker tag $APP_NAME:$VERSION $APP_NAME:latest

# Run smoke tests
echo "🧪 Running smoke tests..."
docker run --rm \
    -e DATABASE_URL=$DATABASE_URL \
    -e REDIS_URL=$REDIS_URL \
    -e OPENAI_API_KEY=$OPENAI_API_KEY \
    $APP_NAME:$VERSION \
    python -m pytest tests/smoke/ -v

# Deploy with rolling update
echo "📦 Deploying to $ENVIRONMENT..."
docker-compose -f docker-compose.$ENVIRONMENT.yml up -d --no-deps --scale app=3

# Wait for health checks
echo "⏳ Waiting for health checks..."
for i in {1..30}; do
    if curl -f http://localhost:8000/health > /dev/null 2>&1; then
        echo "✅ Application is healthy"
        break
    fi
    if [ $i -eq 30 ]; then
        echo "❌ Health check timeout"
        exit 1
    fi
    sleep 10
done

# Run post-deployment tests
echo "🔬 Running post-deployment tests..."
python -m pytest tests/integration/ -v

echo "🎉 Deployment completed successfully!"