fairbanks-server

Fairbanks server is an Elixir application using Phoenix to deliver weather updates to mobile clients.

See Fairbanks.

Release & Deploy

Build server setup

• set up ssh access for server user with publickey auth
  • generate client key
  • add key to server authorized_keys
  • In /etc/ssh/sshd_config, ensure PubkeyAuthentication yes
• install elixir (incl. erlang and Mix dependencies)
  • ensure build user has mix location in $PATH
• Remote copy the prod.secret.exs file to some location on the build server (see docs)

Deployment server setup

• Create postgres user & DB based on config file. Migrations can be run as below.
• Set required env vars:
  • PORT: for Cowboy
  • FAIRBANKS_FEED_URL: e.g., 'https://example.com/rss.xml'. Defaults to localhost (see Mocks server below)
  • FAIRBANKS_USER_AGENT: e.g., 'myapp/v1'

Distillery & EDeliver

EDeliver coordinates with distillery on a build server, and delivers products for running on one or more destination servers. EDeliver configuration lives in .deliver/.

# 1. Build on the build server
$ mix edeliver build release staging --verbose --branch=release

# 2. Deliver artifact to the staging/production server
$ mix edeliver deploy release to staging --verbose

# 3. Start server (if not already)
$ mix edeliver start staging

# 4. Ecto migrations
$ mix edeliver show migrations on staging
$ mix edeliver migrate staging

$ mix edeliver ping staging

--verbose is used here; --debug can be used for all output.

Distillery is the build tool. To build locally, work with distillery directly. Distillery configuration lives in /rel.

$ mix release.clean
$ MIX_ENV=prod mix release

Note on the asset pipeline

Assets are compiled and digested automatically during development; for the build server, the following steps are handled in the delivery script's pre_erlang_clean_compile step.

# Build assets for production
$ ./node_modules/brunch/bin/brunch b -p
# Digest assets (e.g. for cache busting)
$ MIX_ENV=prod mix phoenix.digest

Mocks server

The mocks directory contains a couple of static html files, and a simple server for development. Run cd mocks && python server.py (assuming python 2.x).

Remote shell

1. SSH to server
2. iex --name observer --remsh fairbanks@127.0.0.1 --cookie $ERL_SECRET_COOKIE