January 2017
Intermediate to advanced
258 pages
4h 53m
English
Content preview from Implementing DevOps on AWSBecome 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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Enhancing your ELB health-checks
The stock ELB health checks allow you to check raw TCP responses or go higher in the stack and look for an HTTP/200 response.
Either is good. A basic check should get you started but as your application and its dependencies evolve, you might need to enrich your health checks too.
Let us suppose that you were serving a web application that relies on a cache and a database backend.
If the ELB was checking TCP:80 then as long as your HTTP daemon is running, it will receive an OK. If you were checking for an HTTP/200, instead that would verify access to the application's file(s) on disk but likely not much more.
Instead, you could benefit much more from pointing the ELB at a dedicated health check endpoint within your ...
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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.