Amazon Web Services (AWS)

AWS provides a wide range of cloud services that can be combined to create powerful, scalable applications. Here are the key services and how they can work together:

Object storage service that can store and retrieve any amount of data:

• Files are stored in "buckets" with unique global names
• Highly durable and available storage
• Can trigger events when files are added/modified
• Supports static website hosting

# Example S3 bucket policy for public read access
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PublicRead",
            "Effect": "Allow",
            "Principal": "*",
            "Action": ["s3:GetObject"],
            "Resource": ["arn:aws:s3:::your-bucket-name/*"]
        }
    ]
}

Serverless compute service that runs code in response to events:

• Supports multiple programming languages
• Pay only for compute time used
• Automatic scaling
• Integrates with other AWS services

exports.handler = async (event) => {
    // Example: Process an image uploaded to S3
    const bucket = event.Records[0].s3.bucket.name;
    const key = event.Records[0].s3.object.key;
    
    // Process the image...
    
    // Send notification using SNS
    const message = `Processed image: ${key}`;
    await sns.publish({
        TopicArn: 'your-sns-topic-arn',
        Message: message
    }).promise();
    
    return {
        statusCode: 200,
        body: JSON.stringify('Image processed successfully')
    };
};

Fully managed pub/sub messaging service:

• Send messages to multiple subscribers
• Support for multiple protocols (HTTP, email, SMS, etc.)
• Fan-out architecture
• Integrates with many AWS services

Virtual servers in the cloud:

• Choose from various instance types optimized for different use cases
• Pay-as-you-go pricing
• Scalable compute capacity
• Complete control over virtual machines

AWS services can be connected to create automated workflows. Here's an example:

// Example S3 event configuration
{
    "LambdaFunctionConfigurations": [
        {
            "LambdaFunctionArn": "arn:aws:lambda:region:account-id:function:name",
            "Events": ["s3:ObjectCreated:*"],
            "Filter": {
                "Key": {
                    "FilterRules": [
                        {
                            "Name": "suffix",
                            "Value": ".jpg"
                        }
                    ]
                }
            }
        }
    ]
}

Monitoring and observability service:

• Monitor AWS resources in real-time
• Collect and track metrics
• Set alarms and create automated actions
• Log aggregation and analysis

Manage access to AWS services and resources:

• Create and manage users and groups
• Define fine-grained permissions
• Implement principle of least privilege
• Enable multi-factor authentication (MFA)

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:PutObject"
            ],
            "Resource": "arn:aws:s3:::your-bucket/*"
        }
    ]
}

• Always follow the principle of least privilege for IAM
• Use CloudWatch for monitoring and alerts
• Implement proper error handling in Lambda functions
• Set up proper backup and disaster recovery
• Use versioning for S3 buckets
• Implement proper security groups and network ACLs

• AWS Documentation
• AWS Getting Started Guide
• AWS Architecture Center