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Mix.Task not available in prod releases

#deployment#mix-release#newbie
fergusg

fergusg

Mix.Task not available in prod releases

I am trying to reload the config (after programmatically changing the environment) via

Mix.Task.run("loadconfig")

which works fine via iex -S mix but fails after prod release:

$ env MIX_ENV=prod mix release
$ _build/prod/rel/pubsub_elixir/bin/pubsub_elixir start
[...]
    ** (EXIT) an exception was raised:
        ** (UndefinedFunctionError) function Mix.Task.run/1 is undefined (module Mix.Task is not available)
            Mix.Task.run("loadconfig")
[...]

Similar when I call Mix.Tasks.Loadconfig.run([]) directly.

What am I doing wrong?

6 comments
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fergusg

fergusg

In my case using neither Phoenix nor Ecto, just plain Elixir. I think a solution is to explicitly pass in the envs as docker arguments (or the AWS/ECS equivalent) rather than trying to load at runtime inside the app.

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