ERLANG IN A *NIX WORLDHow to get Erlang to Integrate With Your Environment

Wednesday, June 12, 13

Meta GoalsMake it easy to integrate into a standard unix environment

Make it easy to integrate into a continuous deployment system

Remove the need for a custom tool chain for Erlang

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Goals

How to build releases with Relx

How to integrate those releases under your system management tools

How to build native packages (rpms, debs, etc for your releases)

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Tools We Will UseRelx - Release Building

http://relx.org

Erlnixify - Erlang Node Shim

http://erlware.github.io/erlnixify/

Fpm - Native Package Creation Tool

https://github.com/jordansissel/fpm

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Basic EnvironmentA Unix Environment (either in a VM or native on your laptop)

Erlang

Ruby 1.9.3 (yea, yea)

Git

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Installing DependenciesInstall Gems -

gem install erlnixify

gem install fpm

Download the code

https://github.com/ericbmerritt/EUC2013

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Relx - Creating A ReleaseA tool to build releases

Convention over configuration

Absolutely minimal configuration

Talk tomorrow that will go into more detail

Wednesday, June 12, 13

Relx - Creating A Release>relx Starting relx build process ...Resolving OTP Applications from directories: /Users/emerrit/workspace/EUC2013/echo_get/ebin /Users/emerrit/workspace/EUC2013/echo_get/deps /usr/local/Cellar/erlang/R16B/lib/erlang/lib

Resolving available releases from directories: /Users/emerrit/workspace/EUC2013/echo_get/ebin /Users/emerrit/workspace/EUC2013/echo_get/deps /usr/local/Cellar/erlang/R16B/lib/erlang/lib

Resolved echo_get-0.0.1release successfully created!

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Erlnixify - Running ReleaseA simple ruby app

Traps Unix Signals and propagates them to the running Release in an OTPish way

Monitors the running Release and crashes if the Release crashes

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FPM - Trivial Package BuildingCan build packages most platforms (rpms, debs)

Can build packages based an a directory layout

Can have before/after scripts etc

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Running FPM> relx> mkdir -p _dist/opt/echo_get> mkdir -p _dist/etc/init.d> cp -r _rel _dist/opt/echo_get> cp ./bin/ _dist/etc/init.d> cd _dist> fpm -s dir -t rpm -d esl-erlang -n echo_get -v 0.0.1 \ --rpm-rpmbuild-define '__prelink_undo_cmd %{nil}' \ ./

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Running FPM - Makefilerelease: compile @rm -rf $(DISTDIR) $(REL) @$(REBAR) skip_deps=true release rm -rf $(DISTDIR)/opt mkdir -p $(DISTDIR)/opt mkdir -p $(DISTDIR)/etc/init.d mkdir -p $(DISTDIR)/etc/apollo mkdir -p $(DISTDIR)/var/log/apollo cp -r rel $(DISTDIR)/opt/apollo cp -r $(CURDIR)/etc/* $(DISTDIR)/etc/

rpm: release $(eval $@_NAME := $(shell atbx print-git-vsn | cut -d "," -f 1)) $(eval $@_VSN := $(shell atbx print-git-vsn | cut -d "," -f 2)) cd $(DISTDIR); fpm -s dir -t rpm -d esl-erlang -n $($@_NAME) -v $($@_VSN) \ --before-remove ../bin/before-remove \ --rpm-rpmbuild-define '__prelink_undo_cmd %{nil}' \ ./

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Taking Things a Step Further

Continuous Integration (Jenkins, etc)

Inotify - http://inotify.aiken.cz

Ansible, Puppet or Chef

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August 30th - 31st

http://erlangcamp.com

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October 11th - 12th

http://erlangcamp.com

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