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add support for exclusion rules in dockerignore

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Signed-off-by: Dave Goodchild <buddhamagnet@gmail.com>
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buddhamagnet
2015-04-28 18:56:45 +01:00
parent 67da055ceb
commit 6fd8e485c8
7 changed files with 399 additions and 104 deletions
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docs/sources/articles/dockerfile_best-practices.md
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@@ -32,13 +32,14 @@ ephemeral as possible. By “ephemeral,” we mean that it can be stopped and
destroyed and a new one built and put in place with an absolute minimum of
set-up and configuration.
### Use [a .dockerignore file](https://docs.docker.com/reference/builder/#the-dockerignore-file)
### Use a .dockerignore file
For faster uploading and efficiency during `docker build`, you should use
a `.dockerignore` file to exclude files or directories from the build
context and final image. For example, unless`.git` is needed by your build
process or scripts, you should add it to `.dockerignore`, which can save many
megabytes worth of upload time.
In most cases, it's best to put each Dockerfile in an empty directory. Then,
add to that directory only the files needed for building the Dockerfile. To
increase the build's performance, you can exclude files and directories by
adding a `.dockerignore` file to that directory as well. This file supports
exclusion patterns similar to `.gitignore` files. For information on creating one,
see the [.dockerignore file](../../reference/builder/#dockerignore-file).
### Avoid installing unnecessary packages