Can't deploy Rails app: Permission denied

1

Hi,

I’m trying to deploy a Rails app to Fly (migrating from Heroku). I have run fly launch to set up the app and database, but when I try and deploy the app for the first time I get this error:

=> ERROR [stage-4 5/5] RUN bin/rails fly:build                                                                                                                                                    0.4s
------
 > [stage-4 5/5] RUN bin/rails fly:build:
#23 0.370 /bin/bash: bin/rails: Permission denied
------
Error failed to fetch an image or build from source: error building: executor failed running [/bin/bash -c bin/rails fly:build]: exit code: 126

This is my fly.toml:

# fly.toml file generated for giffnocktsh on 2022-09-16T13:20:27+01:00

app = "giffnocktsh"
kill_signal = "SIGINT"
kill_timeout = 5
processes = []

[build]
  [build.args]
    BUNDLER_VERSION = "2.3.21"
    NODE_VERSION = "18.8.0"
    RUBY_VERSION = "2.7.0"

[deploy]
  release_command = "bin/rails fly:release"

[env]
  PORT = "8080"
  SERVER_COMMAND = "bin/rails fly:server"

[experimental]
  allowed_public_ports = []
  auto_rollback = true

[[services]]
  http_checks = []
  internal_port = 8080
  processes = ["app"]
  protocol = "tcp"
  script_checks = []
  [services.concurrency]
    hard_limit = 25
    soft_limit = 20
    type = "connections"

  [[services.ports]]
    force_https = true
    handlers = ["http"]
    port = 80

  [[services.ports]]
    handlers = ["tls", "http"]
    port = 443

  [[services.tcp_checks]]
    grace_period = "1s"
    interval = "15s"
    restart_limit = 0
    timeout = "2s"

[[statics]]
  guest_path = "/app/public"
  url_prefix = "/"

and my dockerfile:

# syntax = docker/dockerfile:experimental
ARG RUBY_VERSION=2.7.3
ARG VARIANT=jemalloc-slim
FROM quay.io/evl.ms/fullstaq-ruby:${RUBY_VERSION}-${VARIANT} as base

ARG NODE_VERSION=16
ARG BUNDLER_VERSION=2.3.9

ARG RAILS_ENV=production
ENV RAILS_ENV=${RAILS_ENV}

ENV RAILS_SERVE_STATIC_FILES true
ENV RAILS_LOG_TO_STDOUT true

ARG BUNDLE_WITHOUT=development:test
ARG BUNDLE_PATH=vendor/bundle
ENV BUNDLE_PATH ${BUNDLE_PATH}
ENV BUNDLE_WITHOUT ${BUNDLE_WITHOUT}

RUN mkdir /app
WORKDIR /app
RUN mkdir -p tmp/pids

SHELL ["/bin/bash", "-c"]

RUN curl https://get.volta.sh | bash

ENV BASH_ENV ~/.bashrc
ENV VOLTA_HOME /root/.volta
ENV PATH $VOLTA_HOME/bin:/usr/local/bin:$PATH

RUN volta install node@${NODE_VERSION} && volta install yarn

FROM base as build_deps

ARG DEV_PACKAGES="git build-essential libpq-dev wget vim curl gzip xz-utils libsqlite3-dev"
ENV DEV_PACKAGES ${DEV_PACKAGES}

RUN --mount=type=cache,id=dev-apt-cache,sharing=locked,target=/var/cache/apt \
    --mount=type=cache,id=dev-apt-lib,sharing=locked,target=/var/lib/apt \
    apt-get update -qq && \
    apt-get install --no-install-recommends -y ${DEV_PACKAGES} \
    && rm -rf /var/lib/apt/lists /var/cache/apt/archives

FROM build_deps as gems

RUN gem install -N bundler -v ${BUNDLER_VERSION}

COPY Gemfile* ./
RUN bundle install &&  rm -rf vendor/bundle/ruby/*/cache

FROM build_deps as node_modules

COPY package*json ./
COPY yarn.* ./

RUN if [ -f "yarn.lock" ]; then \
    yarn install; \
    elif [ -f "package-lock.json" ]; then \
    npm install; \
    else \
    mkdir node_modules; \
    fi

FROM base

ARG PROD_PACKAGES="postgresql-client file vim curl gzip libsqlite3-0"
ENV PROD_PACKAGES=${PROD_PACKAGES}

RUN --mount=type=cache,id=prod-apt-cache,sharing=locked,target=/var/cache/apt \
    --mount=type=cache,id=prod-apt-lib,sharing=locked,target=/var/lib/apt \
    apt-get update -qq && \
    apt-get install --no-install-recommends -y \
    ${PROD_PACKAGES} \
    && rm -rf /var/lib/apt/lists /var/cache/apt/archives

COPY --from=gems /app /app
COPY --from=node_modules /app/node_modules /app/node_modules

ENV SECRET_KEY_BASE 1

COPY . .

RUN bin/rails fly:build

ENV PORT 8080

ARG SERVER_COMMAND="bin/rails fly:server"
ENV SERVER_COMMAND ${SERVER_COMMAND}
CMD ${SERVER_COMMAND}

Any help would be appreciated. Thanks.