Erlang

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Erlang is a programming language used to build massively scalable systems with high availability.

GitHub repo: https://github.com/c0b/docker-erlang-otp

Library reference

This content is imported from the official Docker Library docs, and is provided by the original uploader. You can view the Docker Store page for this repo at https://store.docker.com/images/erlang.

Supported tags and respective Dockerfile links

For detailed information about the published artifacts of each of the above supported tags (image metadata, transfer size, etc), please see the repos/erlang directory in the docker-library/repo-info GitHub repo.

For more information about this image and its history, please see the relevant manifest file (library/erlang). This image is updated via pull requests to the docker-library/official-images GitHub repo.

What is Erlang?

Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability. Some of its uses are in telecoms, banking, e-commerce, computer telephony and instant messaging. Erlang’s runtime system has built-in support for concurrency, distribution and fault tolerance.

wikipedia.org/wiki/Erlang_(programming_language)

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How to use this image

Run it as the REPL

➸ docker run -it --rm erlang
Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V7.1  (abort with ^G)
1> uptime().
3 seconds
ok
2>                                 % use Ctrl+G to call the shell switch
User switch command
 --> ?
  c [nn]            - connect to job
  i [nn]            - interrupt job
  k [nn]            - kill job
  j                 - list all jobs
  s [shell]         - start local shell
  r [node [shell]]  - start remote shell
  q                 - quit erlang
  ? | h             - this message
 --> q
➸ docker run -it --rm -h erlang.local erlang erl -name snode@erlang.local
Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V7.1  (abort with ^G)
(snode@erlang.local)1> erlang:system_info(otp_release).
"18"
(snode@erlang.local)2>
User switch command
--> q

Run a single Erlang escript

$ docker run -it --rm --name erlang-inst1 -v "$PWD":/usr/src/myapp -w /usr/src/myapp erlang escript your-escript.erl

Image Variants

The erlang images come in many flavors, each designed for a specific use case.

erlang:<version>

This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of. This tag is based off of buildpack-deps. buildpack-deps is designed for the average user of docker who has many images on their system. It, by design, has a large number of extremely common Debian packages. This reduces the number of packages that images that derive from it need to install, thus reducing the overall size of all images on your system.

erlang:slim

This image does not contain the common packages contained in the default tag and only contains the minimal packages needed to run erlang. Unless you are working in an environment where only the erlang image will be deployed and you have space constraints, we highly recommend using the default image of this repository.

License

View license information for the software contained in this image.

  1. From OTP 18 and above, Erlang is released under Apache License 2.0
  2. The previous are released under Erlang Public License (EPL). EPL is a derivative work of the Mozilla Public License (MPL). It contains terms which differ from MPL, mainly in terms of jurisdiction. The license is constructed in accordance with the laws of Sweden.

Supported Docker versions

This image is officially supported on Docker version 17.04.0-ce.

Support for older versions (down to 1.6) is provided on a best-effort basis.

Please see the Docker installation documentation for details on how to upgrade your Docker daemon.

User Feedback

Issues

If you have any problems with or questions about this image, please contact us through a GitHub issue. If the issue is related to a CVE, please check for a cve-tracker issue on the official-images repository first.

You can also reach many of the official image maintainers via the #docker-library IRC channel on Freenode.

Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.

Documentation

Documentation for this image is stored in the erlang/ directory of the docker-library/docs GitHub repo. Be sure to familiarize yourself with the repository’s README.md file before attempting a pull request.

library, sample, Erlang