Docker未安装纱线
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我正在尝试像下面那样运行docker。但是即使我安装了yarn，它仍然无法工作。运行滑轨时出错：[yarn not installed。
Dockerfile：
FROM rails:on-build
EXPOSE 3000
CMD [ "rails" , "s" , "-b" , "0.0.0.0" , "-p", "3000" ]
rails/Dockerfile：
FROM ruby:2.6.2
RUN apt-get update -y && apt-get install -y build-essential libpq-dev nodejs sqlite3
ONBUILD COPY app /opt/app
ONBUILD WORKDIR /opt/app
ONBUILD EXPOSE 3000
ONBUILD RUN bundle install
ONBUILD RUN rake db:migrate
ONBUILD RUN rake db:seed
run.sh：
docker-machine create -d virtualbox Char
eval $(docker-machine env Char)
docker build -t rails:on-build . #this runs ok
docker build -t "thisdir:Dockerfile" . #this command triggers the error
错误：
Sending build context to Docker daemon 3.584kB
Step 1/4 : FROM rails:on-build
# Executing 6 build triggers
---> Using cache
---> Running in 7bfd996846cd
create
create README.md
create Rakefile
create .ruby-version
create config.ru
create .gitignore
create Gemfile
run git init from "."
Initialized empty Git repository in /opt/app/.git/
create package.json
create app
create app/assets/config/manifest.js
create app/assets/stylesheets/application.css
create app/channels/application_cable/channel.rb
create app/channels/application_cable/connection.rb
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
create app/javascript/channels/consumer.js
create app/javascript/channels/index.js
create app/javascript/packs/application.js
create app/jobs/application_job.rb
create app/mailers/application_mailer.rb
create app/models/application_record.rb
create app/views/layouts/application.html.erb
create app/views/layouts/mailer.html.erb
create app/views/layouts/mailer.text.erb
create app/assets/images/.keep
create app/controllers/concerns/.keep
create app/models/concerns/.keep
create bin
create bin/rails
create bin/rake
create bin/setup
create bin/yarn
create config
create config/routes.rb
create config/application.rb
create config/environment.rb
create config/cable.yml
create config/puma.rb
create config/spring.rb
create config/storage.yml
create config/environments
create config/environments/development.rb
create config/environments/production.rb
create config/environments/test.rb
create config/initializers
create config/initializers/application_controller_renderer.rb
create config/initializers/assets.rb
create config/initializers/backtrace_silencers.rb
create config/initializers/content_security_policy.rb
create config/initializers/cookies_serializer.rb
create config/initializers/cors.rb
create config/initializers/filter_parameter_logging.rb
create config/initializers/inflections.rb
create config/initializers/mime_types.rb
create config/initializers/new_framework_defaults_6_0.rb
create config/initializers/wrap_parameters.rb
create config/locales
create config/locales/en.yml
create config/master.key
append .gitignore
create config/boot.rb
create config/database.yml
create db
create db/seeds.rb
create lib
create lib/tasks
create lib/tasks/.keep
create lib/assets
create lib/assets/.keep
create log
create log/.keep
create public
create public/404.html
create public/422.html
create public/500.html
create public/apple-touch-icon-precomposed.png
create public/apple-touch-icon.png
create public/favicon.ico
create public/robots.txt
create tmp
create tmp/.keep
create tmp/pids
create tmp/pids/.keep
create tmp/cache
create tmp/cache/assets
create vendor
create vendor/.keep
create test/fixtures
create test/fixtures/.keep
create test/fixtures/files
create test/fixtures/files/.keep
create test/controllers
create test/controllers/.keep
create test/mailers
create test/mailers/.keep
create test/models
create test/models/.keep
create test/helpers
create test/helpers/.keep
create test/integration
create test/integration/.keep
create test/channels/application_cable/connection_test.rb
create test/test_helper.rb
create test/system
create test/system/.keep
create test/application_system_test_case.rb
create storage
create storage/.keep
create tmp/storage
create tmp/storage/.keep
remove config/initializers/cors.rb
remove config/initializers/new_framework_defaults_6_0.rb
run bundle install
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
Fetching gem metadata from https://rubygems.org/............
Fetching gem metadata from https://rubygems.org/.
Resolving dependencies...
Fetching rake 13.0.1
Installing rake 13.0.1
Fetching concurrent-ruby 1.1.5
Installing concurrent-ruby 1.1.5
Fetching i18n 1.7.0
Installing i18n 1.7.0
Fetching minitest 5.13.0
Installing minitest 5.13.0
Fetching thread_safe 0.3.6
Installing thread_safe 0.3.6
Fetching tzinfo 1.2.5
Installing tzinfo 1.2.5
Fetching zeitwerk 2.2.2
Installing zeitwerk 2.2.2
Fetching activesupport 6.0.2.1
Installing activesupport 6.0.2.1
Fetching builder 3.2.4
Installing builder 3.2.4
Fetching erubi 1.9.0
Installing erubi 1.9.0
Fetching mini_portile2 2.4.0
Installing mini_portile2 2.4.0
Fetching nokogiri 1.10.7
Installing nokogiri 1.10.7 with native extensions
Fetching rails-dom-testing 2.0.3
Installing rails-dom-testing 2.0.3
Fetching crass 1.0.5
Installing crass 1.0.5
Fetching loofah 2.4.0
Installing loofah 2.4.0
Fetching rails-html-sanitizer 1.3.0
Installing rails-html-sanitizer 1.3.0
Fetching actionview 6.0.2.1
Installing actionview 6.0.2.1
Fetching rack 2.0.8
Installing rack 2.0.8
Fetching rack-test 1.1.0
Installing rack-test 1.1.0
Fetching actionpack 6.0.2.1
Installing actionpack 6.0.2.1
Fetching nio4r 2.5.2
Installing nio4r 2.5.2 with native extensions
Fetching websocket-extensions 0.1.4
Installing websocket-extensions 0.1.4
Fetching websocket-driver 0.7.1
Installing websocket-driver 0.7.1 with native extensions
Fetching actioncable 6.0.2.1
Installing actioncable 6.0.2.1
Fetching globalid 0.4.2
Installing globalid 0.4.2
Fetching activejob 6.0.2.1
Installing activejob 6.0.2.1
Fetching activemodel 6.0.2.1
Installing activemodel 6.0.2.1
Fetching activerecord 6.0.2.1
Installing activerecord 6.0.2.1
Fetching mimemagic 0.3.3
Installing mimemagic 0.3.3
Fetching marcel 0.3.3
Installing marcel 0.3.3
Fetching activestorage 6.0.2.1
Installing activestorage 6.0.2.1
Fetching mini_mime 1.0.2
Installing mini_mime 1.0.2
Fetching mail 2.7.1
Installing mail 2.7.1
Fetching actionmailbox 6.0.2.1
Installing actionmailbox 6.0.2.1
Fetching actionmailer 6.0.2.1
Installing actionmailer 6.0.2.1
Fetching actiontext 6.0.2.1
Installing actiontext 6.0.2.1
Fetching public_suffix 4.0.1
Installing public_suffix 4.0.1
Fetching addressable 2.7.0
Installing addressable 2.7.0
Fetching bindex 0.8.1
Installing bindex 0.8.1 with native extensions
Fetching msgpack 1.3.1
Installing msgpack 1.3.1 with native extensions
Fetching bootsnap 1.4.5
Installing bootsnap 1.4.5 with native extensions
Using bundler 2.1.1
Fetching byebug 11.0.1
Installing byebug 11.0.1 with native extensions
Fetching regexp_parser 1.6.0
Installing regexp_parser 1.6.0
Fetching xpath 3.2.0
Installing xpath 3.2.0
Fetching capybara 3.29.0
Installing capybara 3.29.0
Fetching childprocess 3.0.0
Installing childprocess 3.0.0
Fetching ffi 1.11.3
Installing ffi 1.11.3 with native extensions
Fetching jbuilder 2.9.1
Installing jbuilder 2.9.1
Fetching rb-fsevent 0.10.3
Installing rb-fsevent 0.10.3
Fetching rb-inotify 0.10.0
Installing rb-inotify 0.10.0
Fetching ruby_dep 1.5.0
Installing ruby_dep 1.5.0
Fetching listen 3.1.5
Installing listen 3.1.5
Fetching method_source 0.9.2
Installing method_source 0.9.2
Fetching puma 4.3.1
Installing puma 4.3.1 with native extensions
Fetching rack-proxy 0.6.5
Installing rack-proxy 0.6.5
Fetching thor 1.0.1
Installing thor 1.0.1
Fetching railties 6.0.2.1
Installing railties 6.0.2.1
Fetching sprockets 4.0.0
Installing sprockets 4.0.0
Fetching sprockets-rails 3.2.1
Installing sprockets-rails 3.2.1
Fetching rails 6.0.2.1
Installing rails 6.0.2.1
Fetching rubyzip 2.0.0
Installing rubyzip 2.0.0
Fetching sassc 2.2.1
Installing sassc 2.2.1 with native extensions
Fetching tilt 2.0.10
Installing tilt 2.0.10
Fetching sassc-rails 2.1.2
Installing sassc-rails 2.1.2
Fetching sass-rails 6.0.0
Installing sass-rails 6.0.0
Fetching selenium-webdriver 3.142.6
Installing selenium-webdriver 3.142.6
Fetching spring 2.1.0
Installing spring 2.1.0
Fetching spring-watcher-listen 2.0.1
Installing spring-watcher-listen 2.0.1
Fetching sqlite3 1.4.2
Installing sqlite3 1.4.2 with native extensions
Fetching turbolinks-source 5.2.0
Installing turbolinks-source 5.2.0
Fetching turbolinks 5.2.1
Installing turbolinks 5.2.1
Fetching web-console 4.0.1
Installing web-console 4.0.1
Fetching webdrivers 4.1.3
Installing webdrivers 4.1.3
Fetching webpacker 4.2.2
Installing webpacker 4.2.2
Bundle complete! 17 Gemfile dependencies, 75 gems now installed.
Bundled gems are installed into `/usr/local/bundle`
run bundle binstubs bundler
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
run bundle exec spring binstub --all
/usr/local/lib/ruby/2.6.0/bundler/vendor/fileutils/lib/fileutils.rb:1186: warning: already initialized constant Bundler::FileUtils::Entry_::S_IF_DOOR
/usr/local/bundle/gems/bundler-2.1.1/lib/bundler/vendor/fileutils/lib/fileutils.rb:1284: warning: previous definition of S_IF_DOOR was here
/usr/local/lib/ruby/2.6.0/bundler/vendor/fileutils/lib/fileutils.rb:1444: warning: already initialized constant Bundler::FileUtils::Entry_::DIRECTORY_TERM
/usr/local/bundle/gems/bundler-2.1.1/lib/bundler/vendor/fileutils/lib/fileutils.rb:1568: warning: previous definition of DIRECTORY_TERM was here
/usr/local/lib/ruby/2.6.0/bundler/vendor/fileutils/lib/fileutils.rb:1499: warning: already initialized constant Bundler::FileUtils::OPT_TABLE
/usr/local/bundle/gems/bundler-2.1.1/lib/bundler/vendor/fileutils/lib/fileutils.rb:1626: warning: previous definition of OPT_TABLE was here
/usr/local/lib/ruby/2.6.0/bundler/vendor/fileutils/lib/fileutils.rb:1553: warning: already initialized constant Bundler::FileUtils::LOW_METHODS
/usr/local/bundle/gems/bundler-2.1.1/lib/bundler/vendor/fileutils/lib/fileutils.rb:1685: warning: previous definition of LOW_METHODS was here
/usr/local/lib/ruby/2.6.0/bundler/vendor/fileutils/lib/fileutils.rb:1560: warning: already initialized constant Bundler::FileUtils::METHODS
/usr/local/bundle/gems/bundler-2.1.1/lib/bundler/vendor/fileutils/lib/fileutils.rb:1692: warning: previous definition of METHODS was here
bundler: failed to load command: spring (/usr/local/bundle/ruby/2.6.0/bin/spring)
ArgumentError: Trying to register Bundler::GemfileError for status code 4 but Bundler::GemfileError is already registered
/usr/local/lib/ruby/2.6.0/bundler/errors.rb:9:in `status_code'
/usr/local/lib/ruby/2.6.0/bundler/errors.rb:20:in `<class:GemfileError>'
/usr/local/lib/ruby/2.6.0/bundler/errors.rb:20:in `<module:Bundler>'
/usr/local/lib/ruby/2.6.0/bundler/errors.rb:3:in `<top (required)>'
/usr/local/lib/ruby/2.6.0/bundler.rb:10:in `require'
/usr/local/lib/ruby/2.6.0/bundler.rb:10:in `<top (required)>'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/lib/spring/client/run.rb:3:in `require'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/lib/spring/client/run.rb:3:in `<top (required)>'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/lib/spring/client.rb:5:in `require'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/lib/spring/client.rb:5:in `<top (required)>'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/bin/spring:48:in `require'
/usr/local/bundle/ruby/2.6.0/gems/spring-2.1.0/bin/spring:48:in `<top (required)>'
/usr/local/bundle/ruby/2.6.0/bin/spring:23:in `load'
/usr/local/bundle/ruby/2.6.0/bin/spring:23:in `<top (required)>'
rails webpacker:install
Yarn not installed. Please download and install Yarn from https://yarnpkg.com/lang/en/docs/install/
The command '/bin/sh -c rails new app' returned a non-zero code: 1
我尝试通过将以下两行添加到两个Dockerfile的顶部来安装yarn，但是仍然无法正常工作，它具有相同的错误。
FROM node:6.7.0
RUN npm install -g yarn
答案
尝试通过apt-get install yarn在图像中安装纱线并在安装gem之前运行yarn install
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