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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The Downside to Our Existing Approach
Our current approach for managing gems is to rebuild the image any time we need to update our gems. However, you may have noticed that any time we change our Gemfile, even if it’s just adding a single gem, all our gems have to be reinstalled from scratch. As a result, updating our gems takes longer than we’re typically used to.
Why does this happen?
Bundler and Docker images are both trying to achieve the same goal of ensuring a consistent environment, but they achieve it in different ways. Docker’s image-build process breaks some of Bundler’s key assumptions, which means it doesn’t quite work how we’re used to.
Bundler was primarily designed for use on a long-running system where installed gems hang around; ...
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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.