February 2019
Intermediate to advanced
240 pages
5h 25m
English
Content preview from Docker for Rails DevelopersBecome 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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Ignoring Unnecessary Files
You may remember that there’s a separation between the Docker CLI that we use to run commands, and the Docker daemon that does most of the actual work (as we saw in the architecture diagrams for Docker for Linux and Docker for Mac/Windows). Building an image is no different—it’s the Docker daemon that actually builds the image.
How does this work in practice?
When the docker build command is run, the CLI tool takes all the files in the build directory specified—which collectively are known as the build context—and sends them to the Docker daemon. The daemon is then able to process the Dockerfile and carry out the instructions in it to generate the image.
We need a way to restrict which files are sent as part of 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.
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.