The Official Erlang OTP images
This is used as docker base image for Erlang OTP. The goal is to provide images for a few last erlang releases (currently 25 / 24 / 23 / 22 / 21 / 20 / 19 / 18), in close to full feature Erlang OTP, and relatively slim images. Support to 17, R16 and R15 are provided in this repo on a best-effort basis, and not part of official-image effort in docker-library/official-images#1075 .
use the Erlang 23
here is providing the latest Erlang 23 image; you may pull from official-images or build it locally:
$ docker build -t erlang:23.0 ./23
[...]
➸ docker run -it --rm erlang:23.0
Erlang/OTP 23 [erts-11.0.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
Eshell V11.0.3 (abort with ^G)
1> erlang:system_info(otp_release).
"23"
2> os:getenv().
["PROGNAME=erl","ROOTDIR=/usr/local/lib/erlang",
"TERM=xterm","REBAR3_VERSION=3.14.4","REBAR_VERSION=2.6.4",
"PWD=/","HOSTNAME=bc9486c9549b","OTP_VERSION=23.0.3",
"PATH=/usr/local/lib/erlang/erts-11.0.3/bin:/usr/local/lib/erlang/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"EMU=beam","HOME=/root",
"BINDIR=/usr/local/lib/erlang/erts-11.0.3/bin"]
3> 'hello_юникод_世界'. % Erlang20 now support unicode in atom
'hello_юникод_世界'
4> try 1/0 catch C:R:Stacktrace -> logger:error("caught: ~tp~n", [{C,R,Stacktrace}]) end. %% Erlang 21 now has new API for logging, logger
=ERROR REPORT==== 20-Jun-2018::07:23:13.384474 ===
caught: {error,badarith,
[{erlang,'/',[1,0],[]},
{erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,681}]},
{erl_eval,try_clauses,8,[{file,"erl_eval.erl"},{line,911}]},
{shell,exprs,7,[{file,"shell.erl"},{line,686}]},
{shell,eval_exprs,7,[{file,"shell.erl"},{line,642}]},
{shell,eval_loop,3,[{file,"shell.erl"},{line,627}]}]}
5> h(lists,foldl). %% Erlang 23 now has the documentation in the shell
-spec foldl(Fun, Acc0, List) -> Acc1
when
Fun :: fun((Elem :: T, AccIn) -> AccOut),
Acc0 :: term(),
Acc1 :: term(),
AccIn :: term(),
AccOut :: term(),
List :: [T],
T :: term().
Calls Fun(Elem, AccIn) on successive elements A of List,
starting with AccIn == Acc0. Fun/2 must return a new
accumulator, which is passed to the next call. The function
returns the final value of the accumulator. Acc0 is returned if
the list is empty.
Example:
> lists:foldl(fun(X, Sum) -> X + Sum end, 0, [1,2,3,4,5]).
15
> lists:foldl(fun(X, Prod) -> X * Prod end, 1, [1,2,3,4,5]).
120
okFeatures
- observer is a wx widget application, the GUI may require different protocol for different OSes, for Linux it requires X11 protocol be properly setup this wiki has setup for Linux desktop for observer use in elixir, which also applies to Erlang https://github.com/c0b/docker-elixir/wiki/use-observer
- dirty scheduler is enabled since Erlang 19 images;
Read from https://github.com/erlang/otp/releases for each tag description as release announcement.
Design
- the standard variant
erlang:23anderlang:22builds from source code, based onbuildpack-deps:buster; (releases beforeerlang:22builds usingbuildpack-deps:stretch)erlang:23.1and later contains documentation that can be accessed in the shell it covered gcc compiler and some popular -dev packages, for those erlang port drivers written in C; while it doesn't have java compiler so jinterface doesn't compile, assuming demand to write java code for erlang applications is low; - the slim version is built from
debian:busterinstall building tools (compilers & -dev packages) on the fly and uninstall after compilation finished, to shrink image size; - the alpine version is built from last alpine stable image, install building tools (compilers & -dev packages) on the fly and uninstall after compilation finished, also removed src/*.erl include/*.hrl / all docs (include man info) / examples / static archives / build and unittest tools, and strip the ELF binaries, to get a really slim image, ideally smaller than 20MB;
- rebar and rebar3 tool is bundled in
erlang:23,erlang:22,erlang:21,erlang:20,erlang:19anderlang:18image;
Sizes
$ docker images --filter=reference='erlang:*'
REPOSITORY TAG IMAGE ID CREATED SIZE
erlang 23.0 37433d089268 13 days ago 1.22GB
erlang 23.0-slim 372b42eed86b 2 weeks ago 257MB
erlang 23.0-alpine db7cf4f98f42 4 weeks ago 68.7MB
erlang 22.3 c77ded78275c 13 hours ago 1.22GB
erlang 22.3-slim ca5dbe8a4a46 13 hours ago 255MB
erlang 22.3-alpine 661e530efb37 13 hours ago 68.9MB
erlang 21.3 537ac956d5d6 13 days ago 1.07GB
erlang 21.3-slim 5ffbb00d3118 2 weeks ago 251MB
erlang 21.3-alpine 263294b72a1f 2 weeks ago 73.4MB
erlang 20.3 82c4e39617a9 13 days ago 1.07GB
erlang 20.3-slim 3e123645dc80 2 weeks ago 259MB
erlang 20.3-alpine 78861bbea4a0 3 months ago 77.3MBRunning
$ docker run -it --rm erlang:21.0 /bin/bash
root@ed434f6c1081:/# ls /usr/local/lib/erlang/lib/
asn1-5.0.6 erl_interface-3.10.3 observer-2.8 ssh-4.7
common_test-1.16 erts-10.0 odbc-2.12.1 ssl-9.0
compiler-7.2 et-1.6.2 os_mon-2.4.5 stdlib-3.5
crypto-4.3 eunit-2.3.6 otp_mibs-1.2 syntax_tools-2.1.5
debugger-4.2.5 ftp-1.0 parsetools-2.1.7 tftp-1.0
dialyzer-3.3 hipe-3.18 public_key-1.6 tools-3.0
diameter-2.1.5 inets-7.0 reltool-0.7.6 wx-1.8.4
edoc-0.9.3 kernel-6.0 runtime_tools-1.13 xmerl-1.3.17
eldap-1.2.4 megaco-3.18.3 sasl-3.2
erl_docgen-0.8 mnesia-4.15.4 snmp-5.2.11
root@ed434f6c1081:/# ls /usr/local/lib/erlang/lib/ | wc -l
38The official release 21 https://github.com/erlang/otp/tree/maint-21/lib has 39 libs, while here by default it provided 38 of them (plus erts-10.0 from erlang itself), except jinterface, because to build that one would pull all jdk dependencies and make the image too fat; if you really need that to write code in java and interface into erlang code, you may create an issue here to ask for it.