Book Image

AWS Certified Developer - Associate Guide

By : Vipul Tankariya, Bhavin Parmar
Book Image

AWS Certified Developer - Associate Guide

By: Vipul Tankariya, Bhavin Parmar

Overview of this book

AWS Certified Developer - Associate Guide starts with a quick introduction to AWS and the prerequisites to get you started. Then, this book gives you a fair understanding of core AWS services and basic architecture. Next, this book will describe about getting familiar with Identity and Access Management (IAM) along with Virtual private cloud (VPC). Moving ahead you will learn about Elastic Compute cloud (EC2) and handling application traffic with Elastic Load Balancing (ELB). Going ahead you we will talk about Monitoring with CloudWatch, Simple storage service (S3) and Glacier and CloudFront along with other AWS storage options. Next we will take you through AWS DynamoDB – A NoSQL Database Service, Amazon Simple Queue Service (SQS) and CloudFormation Overview. Finally, this book covers understanding Elastic Beanstalk and overview of AWS lambda. At the end of this book, we will cover enough topics, tips and tricks along with mock tests for you to be able to pass the AWS Certified Developer - Associate exam and develop as well as manage your applications on the AWS platform.
Table of Contents (29 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface
Index

What is a stack?


A stack is created on the successful execution of a template in CloudFormation. Executing a template creates a defined set of AWS resources. A group of these AWS resources defined in CloudFormation is called a stack. During template execution, if CloudFormation is unable to create any resource, the whole stack creation fails. When a CloudFormation execution fails, it rolls back all execution steps and deletes any resources created during the process. CloudFormation execution may fail due to several reasons, including insufficient privileges. Due to limited IAM privileges, if the rollback process is unable to delete the created resources, the incomplete stack remains in the AWS account until it is deleted by any IAM user with sufficient privileges to delete the stack.

Note

At the time of creating a stack from the template, AWS CloudFormation only checks for the syntax error in JSON/YAML notation. It does not check whether the IAM user executing the template has sufficient privileges...