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Redis 4.x Cookbook

Redis 4.x Cookbook

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Redis 4.x Cookbook

Redis 4.x Cookbook

5 (4)

Overview of this book

Redis is considered the world's most popular key-value store database. Its versatility and the wide variety of use cases it enables have made it a popular choice of database for many enterprises. Based on the latest version of Redis, this book provides both step-by-step recipes and relevant the background information required to utilize its features to the fullest. It covers everything from a basic understanding of Redis data types to advanced aspects of Redis high availability, clustering, administration, and troubleshooting. This book will be your great companion to master all aspects of Redis. The book starts off by installing and configuring Redis for you to get started with ease. Moving on, all the data types and features of Redis are introduced in detail. Next, you will learn how to develop applications with Redis in Java, Python, and the Spring Boot web framework. You will also learn replication tasks, which will help you to troubleshoot replication issues. Furthermore, you will learn the steps that need to be undertaken to ensure high availability on your cluster and during production deployment. Toward the end of the book, you will learn the topmost tasks that will help you to troubleshoot your ecosystem efficiently, along with extending Redis by using different modules.
Table of Contents (15 chapters)
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13
Windows Environment Setup

Administrating Sentinel


We learned how to set up and test Redis Sentinel in the previous two recipes. Besides monitoring the status of Redis masters and slaves, Redis Sentinel also provides convenient features such as executing scripts on Sentinel events, or on failover. In this recipe, we will first introduce a few Sentinel commands which are frequently used, then we will see how to utilize the scripts execution feature to automate some common operation.

Getting ready…

You must finish the setup in the Setting up Sentinel section of this chapter, and have Redis data servers and Sentinels up and running.

How to do it...

The operations for administrating Redis Sentinel are as follows:

  1. Exploring Sentinel commands:
    1.  Connect to one of the Sentinels using redis-cli:
[email protected]:~$bin/redis-cli -h 192.168.0.33 -p 26379
192.168.0.33:26379>
    1. To get current master data server information, use SENTINEL GET-MASTER-ADDR-BY-NAME <master-name>:
192.168.0.33:26379> SENTINEL GET-MASTER-ADDR-BY-NAME...

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