I've been trying to move my rails app into a docker container, as it used to be ansible managed in a virtualbox for dev env. I've looked at a few docker tutorials and a couple specific to migrating rails applications but I am running into the following error:
=> ERROR [10/10] RUN rails c 0.9s
------
> [10/10] RUN rails c:
#15 0.878 /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/spec_set.rb:91:in `block in materialize': Could not find rake-13.0.1 in any of the sources (Bundler::GemNotFound)
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/spec_set.rb:85:in `map!'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/spec_set.rb:85:in `materialize'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/definition.rb:170:in `specs'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/definition.rb:237:in `specs_for'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/definition.rb:226:in `requested_specs'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/runtime.rb:108:in `block in definition_method'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/runtime.rb:20:in `setup'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler.rb:107:in `setup'
#15 0.879 from /usr/local/bundle/gems/bundler-1.17.3/lib/bundler/setup.rb:20:in `<top (required)>'
#15 0.879 from /usr/local/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
#15 0.879 from /usr/local/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
#15 0.879 from /usr/local/bundle/bin/rails:27:in `<main>'
Here is the simplified dockerfile I am trying to run via docker-compose. I originally had it connected to my MySQL image but have removed that to help debug, however the error still persists.
Dockerfile
FROM ruby:2.4.0
RUN apt-get update -yqq \
&& apt-get install -yqq --no-install-recommends \
build-essential \
mysql-client \
nodejs \
supervisor \
&& apt-get clean -q clean \
&& rm -rf /var/lib/apt/lists
RUN mkdir -p /my_api
ENV RAILS_ROOT /my_api
WORKDIR $RAILS_ROOT
COPY ../../Gemfile ./
RUN gem install bundler --no-ri --no-rdoc --version 1.17.3
RUN bundle install
COPY . ./
RUN gem list
RUN rails c
DockerCompose
version: "3.7"
services:
api:
image: my_api
build:
context: ./
dockerfile: ./docker/app/dockerfile
ports:
- 3000:3000
working_dir: /api
I've tried a few solutions in the following SO threads but nothing seems to remove the error: Specifying path to vendor/cache and installing rake before running bundle install
Putting my solution here just in case someone comes across this:
First I updated my dockerfile to do the following
FROM ruby:2.4.0
RUN apt-get update -yqq \
&& apt-get install -yqq --no-install-recommends \
build-essential \
mysql-client \
nodejs \
supervisor \
vim \
lsof \
htop \
&& apt-get clean -q clean \
&& rm -rf /var/lib/apt/lists
RUN mkdir -p /my_api
ENV RAILS_ROOT /my_api
WORKDIR $RAILS_ROOT
COPY Gemfile ./
COPY . ./
COPY ./railsbox/ansible/group_vars/all/.env ./.env
RUN gem install bundler --no-ri --no-rdoc --version 1.17.3
RUN gem install rake --version 13.0.1 && bundle install --path vendor/cache --no-deployment
RUN gem list
CMD rm -f ./tmp/pids/server.pid && bundle exec rails s -b 0.0.0.0
note the change of COPY . ./. before running bundle install. This will avoid overwriting /vendor/cache after installs are run (I believe).
I also updated my docker-compose setup as follows
api:
image: my_api
build:
context: .
dockerfile: ./docker/app/dockerfile
depends_on:
- mysql
- mysql_test
ports:
- "3000:3000"
working_dir: /my_api
volumes:
- ./:/my_api
- /my_api/vendor/cache
links:
- mysql
- mysql_test
Note the blank volume mapping for /vendor/cache as suggested in this post which explains this with respect to node_modules. I believe with this change you do not need to do the above suggestion of moving COPY . ./ before the bundle install, but I left it as is since I don't think it really matters.