November 2018
Beginner
230 pages
6h 4m
English
Content preview from Docker Quick Start Guide
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The difference between CMD and ENTRYPOINT
Here again, we have two instructions that on the surface seem to be very much the same. It is true that there is some overlap of functionality between the two. Both instructions provide a way to define a default application that is executed when containers are run. However, they each serve their own unique purpose, and in some cases work together to provide greater functionality than either instruction alone.
The best practice is to use the ENTRYPOINT instruction when you want a container to execute as an application, providing a specific (developer) defined function, and to use CMD when you want to give the user more flexibility in what function the container will serve.
Both of these instructions ...
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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.