kitplummer

Distillery issue with /priv when using Docker to build

Trying to use Distillery to create a better packaged container of super basic Cowboy/Plug app. I’ve been able to use MIX_ENV=prod mix distillery.release locally with no problems. But when I try to build with a container the priv/ directory isn’t getting my source priv/static/index.html content.

I’m trying to use the example here: Deploying With Docker - Distillery Documentation but am stuck on getting this piece.

I’ve verified that the locally packaged tar.gz has my content, but the one built using the same exact command in the container does not. I’m probably missing something completely obvious, but am stumped. AFAICT all the versions are the same - I mean mix deps.get is run in both places.

Any ideas?

5 comments

#deployment

0 710 5

2020-01-04 14:50:40 UTC

First Post!

kitplummer

Here’s my Dockerfile:

# The version of Alpine to use for the final image
# This should match the version of Alpine that the `elixir:1.7.2-alpine` image uses
ARG ALPINE_VERSION=3.10

FROM elixir:1.9.4-alpine AS builder

# The following are build arguments used to change variable parts of the image.
# The name of your application/release (required)
ARG APP_NAME
# The version of the application we are building (required)
ARG APP_VSN
# The environment to build with
ARG MIX_ENV=prod
# Set this to true if this release is not a Phoenix app
ARG SKIP_PHOENIX=true
# If you are using an umbrella project, you can change this
# argument to the directory the Phoenix app is in so that the assets
# can be built
ARG PHOENIX_SUBDIR=.

ENV SKIP_PHOENIX=${SKIP_PHOENIX} \
    APP_NAME=${APP_NAME} \
    APP_VSN=${APP_VSN} \
    MIX_ENV=${MIX_ENV}

# By convention, /opt is typically used for applications
WORKDIR /opt/app

# This step installs all the build tools we'll need
RUN apk update && \
  apk upgrade --no-cache && \
  apk add --no-cache \
    git \
    build-base && \
  mix local.rebar --force && \
  mix local.hex --force

# This copies our app source code into the build container
COPY . .

RUN mix do deps.get, deps.compile, compile

# This step builds assets for the Phoenix app (if there is one)
# If you aren't building a Phoenix app, pass `--build-arg SKIP_PHOENIX=true`
# This is mostly here for demonstration purposes
RUN if [ ! "$SKIP_PHOENIX" = "true" ]; then \
  cd ${PHOENIX_SUBDIR}/assets && \
  yarn install && \
  yarn deploy && \
  cd - && \
  mix phx.digest; \
fi

RUN \
  mkdir -p /opt/built && \
  MIX_ENV=${MIX_ENV} mix distillery.release --verbose --env=prod && \
  cp _build/${MIX_ENV}/rel/${APP_NAME}/releases/${APP_VSN}/${APP_NAME}.tar.gz /opt/built && \
  cd /opt/built && \
  tar tvf ${APP_NAME}.tar.gz && \
  tar -xvzf ${APP_NAME}.tar.gz && \
  rm ${APP_NAME}.tar.gz

# From this line onwards, we're in a new image, which will be the image used in production
FROM alpine:${ALPINE_VERSION}

# The name of your application/release (required)
ARG APP_NAME

RUN apk update && \
    apk add --no-cache \
      bash \
      git \
      openssl-dev

ENV REPLACE_OS_VARS=true \
    APP_NAME=${APP_NAME}

WORKDIR /opt/app

COPY --from=builder /opt/built .

CMD trap 'exit' INT; /opt/app/bin/${APP_NAME} foreground

Post #1