August 2018
Intermediate to advanced
384 pages
10h 46m
English
Content preview from AWS System AdministrationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 10. DNS with Route 53
The venerable Domain Name System remains a critical component in the knowledge toolbox of a system administrator. Amazon’s Route 53 service can provide a tighter integration between DNS and other AWS systems such as Elastic Load Balancers and the Elastic Compute Cloud. Although DNS is incredibly simple at its core, a broken or misconfigured DNS server can result in some very interesting problems. Kris Buytaert, one of the original proponents of the DevOps movement, highlights this with the title of his blog: Everything Is a Freaking DNS Problem.
This book assumes that our readers are already familiar with the general concepts surrounding DNS. This chapter therefore focuses on the AWS-specific implementation provided by Route 53, and demonstrates a few techniques that can be used to configure a cloud-aware DNS service.
Creating DNS records to identify the server entry points of an application enables a smoother user experience for your internal users or developers, even when it is not downright required by external public access. It also enables you as the operator to easily replace published entry points with more powerful resources, without having to explicitly inform users of a change taking place. By redirecting a service-specific domain name record to a more powerful instance (or even a load-balancer), an administrator can perform but with a sleight of hand the magic trick of having all users march in a different direction from the one they used a ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.