September 2021
Beginner to intermediate
145 pages
3h 14m
English
Content preview from OpenShift for Developers, 2nd Edition
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Chapter 8. Production Deployment and Scaling
Now that you have deployed the Noted application with a database, we can talk about some basic tasks that you might need to perform to make the platform work for your app. First you will need to scale the quarkus-backend component to run multiple instances and handle more load. Since a few instances of your backend component will be running, we will discuss how OpenShift can deploy updates to the fleet and potentially roll out an update to your app with zero downtime using the proper deployment strategy for your specific application. OpenShift also has robust health checking built in to make sure things are running as expected, which we’ll cover in this chapter as well.
Application Scaling
OpenShift has some powerful built-in mechanisms in place that allow your application to scale by replicating. When a deployment scales upward its replica set creates additional pods for an application. The service associated with this deployment will perform the simple task of spreading the load across the replica set. The number of replicas that a deployment has can be configured manually or automatically based on CPU, memory, or concurrency metrics, as you will see and configure in the sections that follow.
Manual Scaling
Manually scaling the quarkus-backend deployment is a quick and easy way for your application to be able to handle more load.
Open the Topology view to manually scale the quarkus-backend. Select “quarkus-backend,” and click the ...
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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.
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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.