erlang's Introduction

erlang

patches for erlang to run on Nanos

Grab Source:

wget http://erlang.org/download/otp_src_23.0.tar.gz

Patch your repo:

patch -p1 -ruN -d ~/otp < 0001-BEAM-embed-erlexec-and-EPMD.patch
patch -p1 -ruN -d ~/otp < 0002-kernel-auth-erl-skip-cookie-file-permission-checks.patch
patch -p1 -ruN -d ~/otp < 0003-erl_child_setup_thread.patch
patch -p1 -ruN -d ~/otp < 0004-erlexec-nodename-from-ifaddr.patch
patch -p1 -ruN -d ~/otp < 0005-erl_child_setup_thread-netstat-for-inet_ext.patch
patch -p1 -ruN -d ~/otp < 0006-disable-mremap.patch

(Note that the patch 0005 is only useful for packages that use the "inet_ext" package for erlang, such as Helium Miner.)

Build:

./configure && make
sudo make install

Build Hello World:

./erl -compile hi
./erl -noshell -s hi start -s init stop

Config:

{
  "Env": {
    "HOME": "/",
    "ROOTDIR": "/usr/local/lib/erlang",
    "BINDIR": "/usr/local/lib/erlang/erts-11.0/bin",
    "EMU": "beam",
    "PROGNAME": "hi"
  },

  "Args": ["/usr/local/lib/erlang/erts-11.0/bin/erlexec", "-noshell", "-s", "hi", "start", "-s", "init", "stop", "+S", "1"],

  "Files": ["hi.beam"],
  "Dirs": ["usr"]
}

More Prep:

mkdir -p usr/local/lib
cp -R /usr/local/lib/erlang usr/local/lib/.
cp /usr/local/lib/erlang/erts-11.0/bin/erlexec .

RUN

ops run -c config.json erlexec

[/usr/local/lib/erlang/erts-11.0/bin/erlexec -noshell -s hi start -s
init stop +S 1]
booting /home/eyberg/.ops/images/erlexec.img ...
assigned: 10.0.2.15
Hello, world!
exit status 1

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