Classic WoW Forums

Generate a new app

mix phx.new myapp --module MyApp --no-brunch --no-html --database postgres

Start the server

• Install dependencies with mix deps.get
• Create and migrate your database with mix ecto.create && mix ecto.migrate
• Start Phoenix endpoint with mix phx.server

Production

Ready to run in production? Please check our deployment guides.

Ecto

Create new database table

• mix ecto.gen.migration create_user
• mix ecto.migrate

Production

• MIX_ENV=prod mix ecto.create
• MIX_ENV=prod mix ecto.migrate
• PORT=80 MIX_ENV=prod mix run priv/repo/seeds.exs
• PORT=80 MIX_ENV=prod mix phx.server

Installing Elixir on Centos 7

Update the system

sudo yum install epel-release
sudo yum update
sudo reboot

Install Erlang

wget https://packages.erlang-solutions.com/erlang/esl-erlang/FLAVOUR_1_general/esl-erlang_20.2.2-1~centos~7_amd64.rpm
sudo rpm -Uvh ./esl-erlang_20.2.2-1~centos~7_amd64.rpm
sudo yum install erlang

Install Elixir

mkdir -p /usr/bin/elixir
sudo wget https://github.com/elixir-lang/elixir/releases/download/v1.5.2/Precompiled.zip
sudo yum install unzip
sudo unzip Precompiled.zip
export PATH=$PATH:/usr/bin/elixir/bin

Might have to install GCC - needed for comonin/argon2

yum group install "Development Tools"

Installing Elixir on C9

# for some reason C9 complains this file is missing when it tries to remove couchdb
sudo touch /etc/init.d/couchdb

sudo apt-get install inotify-tools
wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb && sudo dpkg -i erlang-solutions_1.0_all.deb
wget http://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc
sudo apt-key add erlang_solutions.asc
sudo apt-get update
sudo apt-get install esl-erlang
sudo apt-get install elixir
mix local.hex

Using Dialyzer for type checking

• Setup with Phoenix
• Uses ExGuard to run every time a file is changed.
• Run mix guard to start watching files.
• Check out .exguard.exs for configuration.

Postgres setup

Change password to postgres user

sudo -u user_name psql db_name

or 

ALTER USER postgres WITH PASSWORD 'new_password';

Edit /var/lib/pgsql/data/pg_hba.conf

local   all   all   trust

systemctl restart postgresql

Issues encountered

• Building the client files fails with not enough ram
• It runs out of ram on a Centos vps so I needed to add more swap space
• https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-centos-7