November 2018
Beginner
230 pages
6h 4m
English
Content preview from Docker Quick Start Guide
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The ENTRYPOINT instruction
The ENTRYPOINT instruction is used to configure a docker image to run like an application or a command. For example, we can use the ENTRYPOINT instruction to make an image that displays help for the curl command. Consider this Dockerfile:
# ENTRYPOINT instruction Dockerfile for Docker Quick StartFROM alpineRUN apk add curlENTRYPOINT ["curl"]CMD ["--help"]
We can run the container image with no overriding CMD parameter and it will show help for the curl command. However, when we run the container with a CMD override parameter, in this case, a URL, the response will be to curl the URL. Take a look:
When run parameters ...
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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.