• Windows 10 Pro x64
• Elixir 1.7.4
• Erlang/OTP 21 (compiled w/ 19)
• Phoenix 1.4
• Ecto 3.0.3
• Distillery 2.0.12
• PostgreSQL 10

1. Set Environment-Variables in your OS:

execute "set-system-vars.bat"

2. Load dependencies:

mix deps.get --only prod

3. Build a release:

set "MIX_ENV=prod" && mix release --env=prod

4. Then you can execute one of the custom commands:

init (db create, migrate, seed):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat init

create (db create):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat init

drop (db drop):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat drop

migrate (db migrate):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat migrate

seed (db seed):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat seed

reset (db reset):

set "COOKIE=MY_PROD_SECRET" && .\_build\prod\rel\phoenix_distillery\bin\phoenix_distillery.bat reset

1. In the "ReleaseTasks-Module" you need to change ":ecto" to ":ecto_sql" in your constant "@start_apps"
2. In generel, configuration in config-Files doesnt work for me! (Problem: the program cant find the DB-Connection-Fields like ":database" for example! But! When you use init callback of repo it works (and.. Of course it also with with dynamic loading -> System.get(..))
3. In the "ReleaseTasks-Module: The repo Migrator needs more then "pool_size: 1" to perform tasks parallel (at least 2). So set it to 2: "repo.start_link(pool_size: 2)"

Thanks to user "StoatPower" for his inspiring Elixirform Post: