June 2015
Intermediate to advanced
240 pages
5h 25m
English
Content preview from Learning DockerBecome 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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The Dockerfile build instructions
So far, we have looked at the integrated build system, the Dockerfile syntax and a sample life cycle, including how a sample Dockerfile is leveraged to generate an image and how a container gets spun off from that image. In this section, we will introduce the Dockerfile instructions, their syntax, and a few fitting examples.
The FROM instruction
The
FROM instruction is the most important one and it is the first valid instruction of a Dockerfile. It sets the base image for the build process. The subsequent instructions would use this base image and build on top of it. The docker build system lets you flexibly use the images built by anyone. You can also extend them by adding more precise and practical features to ...
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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.