September 2016
Intermediate to advanced
100 pages
2h 5m
English
Content preview from OpenShift for Developers
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Chapter 6. Deploying and Scaling Your Application
By now you have successfully deployed both the Hello, World and Insults applications based on the WildFly application server for Java. applications aren’t static and as you continue to make changes you will want to keep redeploying the application. We already showed you how you can manually trigger a rebuild and redeployment of your application, but doing that all the time can get repetitive. In this chapter we discuss how to define triggers so that any time you push changes to your code repository on GitHub, your application will be automatically rebuilt and redeployed. We will also look at how to scale your application, deployment strategies when releasing new versions, application health checks, and rollbacks.
Automatic Deployments Using Webhooks
A webhook (also called a web callback or HTTP push API) is a way an application can provide other applications with real-time information or notifications.
We can configure the GitHub code hosting service to trigger a webhook each time we push a set of changes to your project code repository. Using this tool, we can notify OpenShift when you have made code changes and thus initiate rebuild and redeployment of our application.
Adding Our Webhook URI to GitHub
Before we can configure GitHub with a webhook for your application, we need to first find the webhook URI for your particular application:
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Navigate back to the Builds page for the helloworld application in the OpenShift web ...
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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.