The rails dockerfile from flyctl builds and runs on its own but I’m having trouble getting it to run via docker compose.
docker-compose up
...
web | bundler: command not found: puma
web | Install missing gem executables with `bundle install`
web exited with code 127
web | bundler: command not found: puma
web | Install missing gem executables with `bundle install`
web exited with code 127
web | bundler: command not found: puma
web | Install missing gem executables with `bundle install`
web exited with code 127
^CGracefully stopping... (press Ctrl+C again to force)
[+] Running 0/1
⠙ Container web Stopping 0.2s
canceled
.dockerignore
Dockerfile
docker-compose.yml
services:
web:
build:
context: "."
args:
- "RAILS_ENV=${RAILS_ENV:-production}"
- "BUNDLE_WITHOUT="
depends_on:
- "postgres"
env_file:
- ".env"
restart: "${DOCKER_RESTART_POLICY:-unless-stopped}"
stop_grace_period: "3s"
tty: true
volumes:
- ".:/app"
container_name: web
ports:
- "${DOCKER_WEB_PORT_FORWARD:-127.0.0.1:8080}:8080"
postgres:
container_name: postgres
env_file:
- ".env"
image: "postgres:14.2-bullseye"
restart: "${DOCKER_RESTART_POLICY:-unless-stopped}"
stop_grace_period: "3s"
volumes:
- "postgres:/var/lib/postgresql/data"
volumes:
postgres: {}
Gemfile
source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby "3.1.2"
# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", "~> 7.0.3"
# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
gem "sprockets-rails"
# Use postgresql as the database for Active Record
gem "pg", "~> 1.1"
# Use the Puma web server [https://github.com/puma/puma]
gem "puma", "~> 5.0"
# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
gem "importmap-rails"
# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
gem "turbo-rails"
# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
gem "stimulus-rails"
# Use Tailwind CSS [https://github.com/rails/tailwindcss-rails]
gem "tailwindcss-rails"
# Build JSON APIs with ease [https://github.com/rails/jbuilder]
gem "jbuilder"
# Use Redis adapter to run Action Cable in production
# gem "redis", "~> 4.0"
# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
# gem "kredis"
# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
# gem "bcrypt", "~> 3.1.7"
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
# Reduces boot times through caching; required in config/boot.rb
gem "bootsnap", require: false
# Use Sass to process CSS
# gem "sassc-rails"
# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
# gem "image_processing", "~> 1.2"
group :development, :test do
# See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
gem "debug", platforms: %i[ mri mingw x64_mingw ]
end
group :development do
# Use console on exceptions pages [https://github.com/rails/web-console]
gem "web-console"
# Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
# gem "rack-mini-profiler"
# Speed up commands on slow machines / big apps [https://github.com/rails/spring]
# gem "spring"
end
group :test do
# Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
gem "capybara"
gem "selenium-webdriver"
gem "webdrivers"
end
Thanks for taking a look.
Answering my own question…Here is a docker-compose.yml file that helps with updating gems when in development:
x-app: &default-app
build:
context: "." # expects Dockerfile from flyctl
args: &ruby-build-args
- "RAILS_ENV=${RAILS_ENV:-development}"
- "BUNDLE_WITHOUT=${BUNDLE_WITHOUT:-}"
restart: "${DOCKER_RESTART_POLICY:-unless-stopped}"
stop_grace_period: "3s"
tty: true
volumes:
- ".:/app"
user: "1000:1000" # avoid permission errors when accessing files generated by a container
services:
web:
<<: *default-app
container_name: web
environment:
- DATABASE_URL=postgresql://${POSTGRES_USER:-app}:${POSTGRES_PASSWORD:-password}@postgres
ports:
- "8080:8080"
depends_on:
- "postgres"
bundler:
<<: *default-app
container_name: bundler
build:
context: "."
target: gems
args: *ruby-build-args
profiles:
- bundler # add profile so service will not run with `docker-compose up`
postgres:
container_name: postgres
image: "postgres:14.2-bullseye"
restart: "${DOCKER_RESTART_POLICY:-unless-stopped}"
stop_grace_period: "3s"
volumes:
- "postgres:/var/lib/postgresql/data"
environment:
- POSTGRES_USER=${POSTGRES_USER:-app}
- POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}
volumes:
postgres: {}
Link to Dockerfile and .dockerignore: flyctl/internal/sourcecode/templates/rails/standard at master · superfly/flyctl (github.com)
Build Docker image used for installing ruby gems with bundler
The flyct Rails Dockerfile has a gems stage used for installing Ruby dependencies. This Docker Compose configuration will create an image using the gems stage that can be used to run bundle install.
docker-compose build bundler
This command will build an image from the Dockerfile’s gems stage. By default Bundler is set to install without development and test dependencies. Override the default by passing an empty build argument BUNDLE_WITHOUT= to prevent excluding any gem groups.
Use bundler service to bundle install
When the Gemfile is modified use the bundler service to install the new gems on your Docker host and update the Gemfile.lock.
docker-compose run bundler bundle install
Rebuild the web service
Now that the Gemfile.lock has been modified, build the web service to update the image.
docker-compose build web
Run your app
docker-compose up
1 Like
I am struggling hard with bundler: command not found: rails
I am also unable to see these echo logs (I don’t know where they go).
fly deploy
==> Verifying app config
Validating /Users/dilraj/Documents/SPG/spg2/fly.toml
Platform: machines
✓ Configuration is valid
--> Verified app config
==> Building image
Remote builder fly-builder-still-snowflake-1492 ready
==> Creating build context
--> Creating build context done
==> Building image with Docker
--> docker host: 20.10.12 linux x86_64
[+] Building 9.0s (0/1)
[+] Building 43.3s (20/20) FINISHED
=> [internal] load remote build context 0.0s
=> copy /context / 0.5s
=> [internal] load metadata for docker.io/library/ruby:3.2.1-alpine 0.3s
=> [stage-1 1/4] FROM docker.io/library/ruby:3.2.1-alpine@sha256:04ad49303 0.0s
=> CACHED [builder 2/13] RUN apk --update add build-base sqlite-d 0.0s
=> CACHED [builder 3/13] WORKDIR /app 0.0s
=> CACHED [builder 4/13] COPY Gemfile Gemfile.lock ./ 0.0s
=> [builder 5/13] RUN ls 0.3s
=> [builder 6/13] RUN echo "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" 0.3s
=> [builder 7/13] RUN gem install bundler:2.4.7 1.0s
=> [builder 8/13] RUN bundler install || echo "bundler install failed" 18.3s
=> [builder 9/13] RUN bundle config set path 'vendor/bundle' 0.5s
=> [builder 10/13] RUN bundle config set deployment 'true' 0.4s
=> [builder 11/13] RUN bundle install --jobs=4 --without development test 16.8s
=> [builder 12/13] RUN bundle show rails || echo "Rails not installed" 0.5s
=> [builder 13/13] COPY . . 0.3s
=> CACHED [stage-1 2/4] RUN apk --update add sqlite-libs nodejs 0.0s
=> CACHED [stage-1 3/4] WORKDIR /app 0.0s
=> [stage-1 4/4] COPY --from=builder /app /app 0.8s
=> exporting to image 1.5s
=> => exporting layers 1.5s
=> => writing image sha256:bace840321c937c81b33e313adb6a39a1e605c2941d27be 0.0s
=> => naming to registry.fly.io/spg2:deployment-01H238HQMGG2QHFDTGQ7QB40NT 0.0s
--> Building image done
==> Pushing image to fly
The push refers to repository [registry.fly.io/spg2]
e092f271ea75: Pushed
ce945830ff45: Pushed
18b927b1a9aa: Pushed
0db7f5871350: Pushed
a15ec33dce4d: Pushed
ea00212692e8: Pushed
e9a920ef7757: Pushed
f1417ff83b31: Pushed
deployment-01H238HQMGG2QHFDTGQ7QB40NT: digest: sha256:a2896fdb39c6bc6946744321b3f6ce48391110dc3d2867d63d59bf13b6f86f72 size: 1996
--> Pushing image done
image: registry.fly.io/spg2:deployment-01H238HQMGG2QHFDTGQ7QB40NT
image size: 393 MB
Watch your app at https://fly.io/apps/spg2/monitoring
Provisioning ips for spg2
Dedicated ipv6: 2a09:8280:1::37:2555
Shared ipv4: 66.241.125.164
Add a dedicated ipv4 with: fly ips allocate-v4
This deployment will:
* create 2 "app" machines
No machines in group app, launching a new machine
Machine 6e82dd00f11687 [app] has state: started
[1/1] Checking that 6e82dd00f11687 [app] is up and running
Smoke checks for 6e82dd00f11687 failed: the app appears to be crashing
Check its logs: here's the last lines below, or run 'fly logs -i 6e82dd00f11687':
Successfully prepared image registry.fly.io/spg2:deployment-01H238HQMGG2QHFDTGQ7QB40NT (6.953400624s)
Starting init (commit: 8af0ddf)...
Preparing to run: `bundle exec rails server -b 0.0.0.0` as root
2023/06/04 13:13:17 listening on [fdaa:2:4ebf:a7b:f2:5840:9f4e:2]:22 (DNS: [fdaa::3]:53)
bundler: command not found: rails
Install missing gem executables with `bundle install`
Starting clean up.
hallpass exited, pid: 514, status: signal: 15
2023/06/04 13:13:18 listening on [fdaa:2:4ebf:a7b:f2:5840:9f4e:2]:22 (DNS: [fdaa::3]:53)
[ 2.116338] reboot: Restarting system
machine did not have a restart policy, defaulting to restart
Starting init (commit: 8af0ddf)...
Preparing to run: `bundle exec rails server -b 0.0.0.0` as root
2023/06/04 13:13:19 listening on [fdaa:2:4ebf:a7b:f2:5840:9f4e:2]:22 (DNS: [fdaa::3]:53)
bundler: command not found: rails
Install missing gem executables with `bundle install`
Starting clean up.
hallpass exited, pid: 514, status: signal: 15
2023/06/04 13:13:20 listening on [fdaa:2:4ebf:a7b:f2:5840:9f4e:2]:22 (DNS: [fdaa::3]:53)
Error: smoke checks for 6e82dd00f11687 failed: the app appears to be crashing
My Dockerfile
# Stage 1: Build stage
FROM ruby:3.2.1-alpine AS builder
RUN apk --update add \
build-base \
sqlite-dev \
nodejs
WORKDIR /app
COPY Gemfile Gemfile.lock ./
RUN ls
RUN echo "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
RUN gem install bundler:2.4.7
RUN bundler install || echo "bundler install failed"
RUN bundle config set path 'vendor/bundle'
RUN bundle config set deployment 'true'
RUN bundle install --jobs=4 --without development test || echo "bundle install failed"
RUN bundle show rails || echo "Rails not installed"
COPY . .
# Stage 2: Final image
FROM ruby:3.2.1-alpine
RUN apk --update add \
sqlite-libs \
nodejs
WORKDIR /app
COPY --from=builder /app /app
EXPOSE 3000
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]