Docker building error

I trying to build my app via docker for deployment. But I am getting following error:

Step 10/16 : RUN mix local.rebar --force
 ---> Running in a94f4db28a16
warning: found quoted keyword "test" but the quotes are not required. Note that keywords are always atoms, even when quoted, and quotes should only be used to introduce keywords with foreign characters in them

** (ArgumentError) argument error
    (stdlib) erl_eval.erl:677: :erl_eval.do_apply/6
    (stdlib) erl_eval.erl:273: :erl_eval.expr/5
    (stdlib) erl_eval.erl:885: :erl_eval.expr_list/6
    (stdlib) erl_eval.erl:240: :erl_eval.expr/5
    (stdlib) erl_eval.erl:232: :erl_eval.expr/5
    (stdlib) erl_eval.erl:233: :erl_eval.expr/5
    (stdlib) erl_eval.erl:885: :erl_eval.expr_list/6
The command '/bin/sh -c mix local.rebar --force' returned a non-zero code: 1

But when I just run ‘mix local.rebar --force’, I don’t get any error. I am not able to figure out what the error is trying to say.

# Set the Docker image you want to base your image off.
# I chose this one because it has Elixir preinstalled.
FROM elixir:latest

# install node
RUN wget -O
RUN bash
RUN apt-get install nodejs

# create app folder
RUN mkdir /app
COPY . /app

# setting the port and the environment (prod = PRODUCTION!)

# install dependencies (production only)
RUN mix local.rebar --force
RUN mix deps.get --only prod
RUN mix compile

# install node dependencies
RUN npm install
# build only the things for production
RUN node node_modules/brunch/bin/brunch build --production

# create the digests
RUN mix phoenix.digest

# run phoenix in production on PORT 4000
CMD mix phoenix.server%

Please tell me where should I look.

I can’t reproduce.

Please purge your docker cache and try again (docker system prune --force).

1 Like

Still the same error.
Is “warning: found quoted keyword “test” but the quotes are not required. Note that keywords are always atoms, even when quoted, and quotes should only be used to introduce keywords with foreign characters in them
mix.exs:59” the issue?

I tried
#Build Stage
FROM bitwalker/alpine-elixir:1.6.5 as build

#Copy the source folder into the Docker image
COPY . .

#Install dependencies and build Release
RUN export MIX_ENV=prod && \
    rm -Rf _build && \
    mix deps.get && \
    mix release

#Extract Release archive to /rel for copying in next stage
    RELEASE_DIR=`ls -d _build/prod/rel/$APP_NAME/releases/*/` && \
    mkdir /export && \
    tar -xf "$RELEASE_DIR/$APP_NAME.tar.gz" -C /export

#Deployment Stage
FROM pentacent/alpine-erlang-base:latest

#Set environment variables and expose port

#Copy and extract .tar.gz Release file from the previous stage
COPY --from=build /export/ .

#Change user
USER default

#Set default entrypoint and command
ENTRYPOINT ["/opt/app/bin/MY_APP_NAME"]
CMD ["foreground"]

and getting this error:
** (Mix.Config.LoadError) could not load config config/prod.exs
** (ArgumentError) argument error
(stdlib) erl_eval.erl:670: :erl_eval.do_apply/6
(stdlib) erl_eval.erl:269: :erl_eval.expr/5
(stdlib) erl_eval.erl:878: :erl_eval.expr_list/6
(stdlib) erl_eval.erl:236: :erl_eval.expr/5
(stdlib) erl_eval.erl:228: :erl_eval.expr/5
(stdlib) erl_eval.erl:229: :erl_eval.expr/5
(stdlib) erl_eval.erl:878: :erl_eval.expr_list/6
The command ‘/bin/sh -c export MIX_ENV=prod && rm -Rf _build && mix deps.get && mix release’ returned a non-zero code: 1

I think there is some problem in my config/prod.exs but can’t figure out what:
config/prod.exs :
use Mix.Config

# For production, we often load configuration from external
# sources, such as your system environment. For this reason,
# you won't find the :http configuration below, but set inside
# LetsColearnWeb.Endpoint.init/2 when load_from_system_env is
# true. Any dynamic configuration should be done there.
# Don't forget to configure the url host to something meaningful,
# Phoenix uses this information when generating URLs.
# Finally, we also include the path to a cache manifest
# containing the digested version of static files. This
# manifest is generated by the mix phx.digest task
# which you typically run after static files are built.
config :letsColearn, LetsColearnWeb.Endpoint,
  load_from_system_env: true,
  url: [host: "", port: 80],
  cache_static_manifest: "priv/static/cache_manifest.json"

# Do not print debug messages in production
config :logger, level: :info

config :guardian, Guardian,
  secret_key: System.get_env("GUARDIAN_SECRET_KEY")

config :letsColearn, LetsColearn.Repo,
  adapter: Ecto.Adapter.Postgres,
  url: System.get_env("DATABASE_URL"), 
  pool_size: String.to_integer(System.get_env("POOL_SIZE")) || "10",
  ssl: false
# ## SSL Support
# To get SSL working, you will need to add the `https` key
# to the previous section and set your `:url` port to 443:
#     config :letsColearn, LetsColearnWeb.Endpoint,
#       ...
#       url: [host: "", port: 443],
#       https: [:inet6,
#               port: 443,
#               keyfile: System.get_env("SOME_APP_SSL_KEY_PATH"),
#               certfile: System.get_env("SOME_APP_SSL_CERT_PATH")]
# Where those two env variables return an absolute path to
# the key and cert in disk or a relative path inside priv,
# for example "priv/ssl/server.key".
# We also recommend setting `force_ssl`, ensuring no data is
# ever sent via http, always redirecting to https:
#     config :letsColearn, LetsColearnWeb.Endpoint,
#       force_ssl: [hsts: true]
# Check `Plug.SSL` for all available options in `force_ssl`.

# ## Using releases
# If you are doing OTP releases, you need to instruct Phoenix
# to start the server for all endpoints:
#     config :phoenix, :serve_endpoints, true
# Alternatively, you can configure exactly which server to
# start per endpoint:
#     config :letsColearn, LetsColearnWeb.Endpoint, server: true

# Finally import the config/prod.secret.exs
# which should be versioned separately.
import_config "prod.secret.exs" 

I must accept that I am coping codes without understanding every bit.

Thats a warning, and you can simply solve it by changing :"test" or "test": in mix.exs in the marked line to :test/test:.

The error is happening somewhere else, I’d say.

Yes, thats possible. If you run MIX_ENV=prod mix compile on your machine do you get any errors then? Does config/prod.secret.exs exist? Do you have it in your dockerignore?

Thank you NoobZ. I used this

config :letsColearn, LetsColearn.Endpoint,
  http: [port: {:system, "PORT"}, compress: true],
  url: [scheme: "http", host: System.get_env("HOST"), port: {:system, "PORT"}],
  secret_key_base: System.get_env("SECRET_KEY_BASE"),
  code_reloader: false,
  cache_static_manifest: "priv/static/manifest.json",
  server: true

config :letsColearn, LetsColearn.Repo,
  adapter: Ecto.Adapters.Postgres,
  database: System.get_env("RDS_DB_NAME"),
  username: System.get_env("RDS_USERNAME"),
  password: System.get_env("RDS_PASSWORD"),
  hostname: System.get_env("RDS_HOSTNAME"),
  port: System.get_env("RDS_PORT") || 5432,
  pool_size: 20,
  ssl: true

config :logger, level: :info