Jay

For any other folks out there struggling with this problem, in my case it turned out to be a docker issue.

1. On Docker desktop, Settings > General
2. Select gRPC FUSE instead of VirtioFS, which I believe is the default
3. Uncheck Use Virtualization framework

Open a new terminal tab, and build again:

docker build --no-cache -t blog .

Hi! I'm having a little trouble with building a docker image for an out-of-the-box rails app. It's failing with the error below (cssbundling-rails: Command build failed, ensure yarn build:css runs without errors), although yarn build:css does in fact work without errors. The Dockerfile is generated by Rails with no changes, but it's here for reference.

Is it expected that a person would be able to build a Docker image from the default Rails Dockerfile without any further configuration?

Thanks! Details below.

-> ruby --version
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-darwin23]

-> rails --version
Rails 7.1.1

-> yarn --version
1.22.19

-> rails new bookstore -d postgresql -c bootstrap
[stuff happens]

-> cd bookstore
-> docker build -t bookstore .

Some log messages removed, but it fails with the following error:

=> [build 8/9] RUN bundle exec bootsnap precompile app/ lib/ 0.8s
=> ERROR [build 9/9] RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile 4.7s
------
 > [build 9/9] RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile:
1.488 yarn install v1.22.19
1.547 [1/4] Resolving packages...
1.618 success Already up-to-date.
1.627 Done in 0.14s.
1.830 yarn run v1.22.19
1.897 $ yarn build:css:compile && yarn build:css:prefix
2.170 $ sass ./app/assets/stylesheets/application.bootstrap.scss:./app/assets/builds/application.css --no-source-map --load-path=node_modules
4.509 $ postcss ./app/assets/builds/application.css --use=autoprefixer --output=./app/assets/builds/application.css
4.595 Segmentation fault
4.609 error Command failed with exit code 139.
4.609 info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
4.635 error Command failed with exit code 139.
4.635 info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
4.650 bin/rails aborted!
4.650 cssbundling-rails: Command build failed, ensure `yarn build:css` runs without errors
4.650
4.650 Tasks: TOP => assets:precompile => css:build
4.650 (See full trace by running task with --trace)
------
Dockerfile:50
--------------------
  48 |
  49 |     # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
  50 | >>> RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
  51 |
  52 |
--------------------

However, yarn build:css seems to run fine:

-> yarn run v1.22.19
warning ../package.json: No license field
$ yarn build:css:compile && yarn build:css:prefix
warning ../package.json: No license field
$ sass ./app/assets/stylesheets/application.bootstrap.scss:./app/assets/builds/application.css --no-source-map --load-path=node_modules
warning ../package.json: No license field
$ postcss ./app/assets/builds/application.css --use=autoprefixer --output=./app/assets/builds/application.css
✨  Done in 3.44s.

As does SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

-> SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
yarn install v1.22.19
warning ../package.json: No license field
[1/4] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.17s.
yarn run v1.22.19
warning ../package.json: No license field
$ yarn build:css:compile && yarn build:css:prefix
warning ../package.json: No license field
$ sass ./app/assets/stylesheets/application.bootstrap.scss:./app/assets/builds/application.css --no-source-map --load-path=node_modules
warning ../package.json: No license field
$ postcss ./app/assets/builds/application.css --use=autoprefixer --output=./app/assets/builds/application.css
✨  Done in 4.52s.