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

Setting up a MySQL read replica

The main purpose of a read-only replica is to serve read-only traffic, so that the load (namely, read-only load) from the primary database will be reduced. Read-only replicas can also be used as a disaster recovery solution because we can promote the read-only replica to the master if our master instance happened to fail. In order to create a read-only replica for MySQL, please follow this series of steps:

  1. Go back to the RDS console at https://console.aws.amazon.com/rds/. In the left navigation pane, click on Databases, choose the database you have created in the last step (prod-db), and then, from the Actions dropdown, select Create read replica:
    Figure 7.14 – Setting up the read replica

    Figure 7.14 – Setting up the read replica

  2. Here, keep all the settings as their defaults, except under Settings: make sure to give the DB instance identifier some meaningful name. This is used to uniquely identify your database instance (for example, prod-db-replica). One of the primary reasons...