Book Image

AWS for System Administrators

By : Prashant Lakhera
Book Image

AWS for System Administrators

By: Prashant Lakhera

Overview of this book

Amazon Web Services (AWS) is one of the most popular and efficient cloud platforms for administering and deploying your applications to make them resilient and robust. AWS for System Administrators will help you to learn several advanced cloud administration concepts for deploying, managing, and operating highly available systems on AWS. Starting with the fundamentals of identity and access management (IAM) for securing your environment, this book will gradually take you through AWS networking and monitoring tools. As you make your way through the chapters, you’ll get to grips with VPC, EC2, load balancer, Auto Scaling, RDS database, and data management. The book will also show you how to initiate AWS automated backups and store and keep track of log files. Later, you’ll work with AWS APIs and understand how to use them along with CloudFormation, Python Boto3 Script, and Terraform to automate infrastructure. By the end of this AWS book, you’ll be ready to build your two-tier startup with all the necessary infrastructure, monitoring, and logging components in place.
Table of Contents (18 chapters)
1
Section 1: AWS Services and Tools
4
Section 2: Building the Infrastructure
7
Section 3: Adding Scalability and Elasticity to the Infrastructure
11
Section 4: The Monitoring, Metrics, and Backup Layers

Some common pitfalls – VPC limitations

The VPC is one of the most critical components as this is the place where we start our AWS journey, and it is where we begin setting up our network before deploying other resources such as EC2. Before we start using it, there are some limits for VPC resources, but most of them are soft limits (unless indicated), and you should always contact AWS customer support to increase these resource limits. Some of these limits that you should be aware of are presented here:

  • You can only have five VPCs per region. This is generally an AWS newbie error, initially in the Proof of Concept (POC) phase, when trying to create multiple VPCs in a region. The good news is this is a soft limit, and you can always contact AWS Support to increase this value.
  • By default, you can have 200 subnets per VPC, but again this is a soft limit.
  • By default, you can have five internet gateways and Network Address Translation (NAT) gateways per region, but...