Elixir apps as systemd services - info & wiki

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WORKING STEP TO DEPLOY PHOENIX WITH SYSTEMD

  1. make sure
    Can't run phoenix with elixir 1.9.0 release
  2. do mix release, for example
    SECRET_KEY_BASE='MBwDNPWb9nw5K/Cm/QJ62dgKeU7OM76hH7hVz9HMo7f2fasurhNqGNaMsFh3Ll' DATABASE_URL='ecto://user:password@host/database' PORT=4002 MIX_ENV=prod mix release
  3. Change this systemd config file
[Unit]
Description=My Phoenix App
After=network.target

[Install]
WantedBy=multi-user.target

[Service]
Environment="HOME=/var/app/my-phoenix-app"
ExecStart=/var/app/my-phoenix-app/_build/prod/rel/my-phoenix-app/bin/my-phoenix-app start
ExecStop=/var/app/my-phoenix-app/_build/prod/rel/my-phoenix-app/bin/my-phoenix-app stop
SyslogIdentifier=simple
Restart=always

# 'StartLimitInterval' must be greater than 'RestartSec * StartLimitBurst' otherwise the service will be restarted indefinitely.
# https://serverfault.com/a/800631
RestartSec=5
StartLimitBurst=3
StartLimitInterval=10