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Paketo BuildpacksでRuby on RailsアプリケーションをOCI imageにbuildする

参考

Warning

mysql2 library のようにnative extentionを一緒にインストールする必要のあるgem libraryをインストールするためには full builder image(paketobuildpacks/builder:full) を指定する必要があります。 - https://github.com/paketo-buildpacks/ruby/issues/862

$ pack build puma-sample --buildpack paketo-buildpacks/ruby --builder paketobuildpacks/builder:full

paketobuildpacks/builder:base では以下エラーとなりました 
      Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

      current directory:
      /layers/paketo-buildpacks_bundle-install/launch-gems/ruby/3.2.0/gems/mysql2-0.5.5/ext/mysql2
      /layers/paketo-buildpacks_mri/mri/bin/ruby -I
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0 extconf.rb
      checking for rb_absint_size()... yes
      checking for rb_absint_singlebit_p()... yes
      checking for rb_gc_mark_movable()... yes
      checking for rb_wait_for_single_fd()... yes
      checking for rb_enc_interned_str() in ruby.h... yes
      *** extconf.rb failed ***
      Could not create Makefile due to some reason, probably lack of necessary
      libraries and/or headers.  Check the mkmf.log file for more details.  You may
      need configuration options.

      Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/layers/paketo-buildpacks_mri/mri/bin/$(RUBY_BASE_NAME)
        --with-openssl-dir
        --without-openssl-dir
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
        --with-mysql-config
        --without-mysql-config
        --with-mysqlclient-dir
        --without-mysqlclient-dir
        --with-mysqlclient-include
        --without-mysqlclient-include=${mysqlclient-dir}/include
        --with-mysqlclient-lib
        --without-mysqlclient-lib=${mysqlclient-dir}/lib
        --with-mysqlclientlib
        --without-mysqlclientlib
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/mkmf.rb:1083:in `block in
      find_library': undefined method `split' for nil:NilClass (NoMethodError)

          paths = paths.flat_map {|path| path.split(File::PATH_SEPARATOR)}
                                             ^^^^^^
        from /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/mkmf.rb:1083:in `each'
      from /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/mkmf.rb:1083:in
      `flat_map'
      from /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/mkmf.rb:1083:in
      `find_library'
        from extconf.rb:131:in `<main>'

      To see why this extension failed to compile, please check the mkmf.log which can
      be found here:

      /layers/paketo-buildpacks_bundle-install/launch-gems/ruby/3.2.0/extensions/x86_64-linux/3.2.0-static/mysql2-0.5.5/mkmf.log

      extconf failed, exit code 1

      Gem files will remain installed in
      /layers/paketo-buildpacks_bundle-install/launch-gems/ruby/3.2.0/gems/mysql2-0.5.5
      for inspection.
      Results logged to
      /layers/paketo-buildpacks_bundle-install/launch-gems/ruby/3.2.0/extensions/x86_64-linux/3.2.0-static/mysql2-0.5.5/gem_make.out

      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/builder.rb:102:in
      `run'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/ext_conf_builder.rb:28:in
      `build'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/builder.rb:170:in
      `build_extension'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/builder.rb:204:in
      `block in build_extensions'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/builder.rb:201:in
      `each'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/ext/builder.rb:201:in
      `build_extensions'
      /layers/paketo-buildpacks_mri/mri/lib/ruby/3.2.0/rubygems/installer.rb:843:in
      `build_extensions'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/rubygems_gem_installer.rb:72:in
      `build_extensions'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/rubygems_gem_installer.rb:28:in
      `install'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/source/rubygems.rb:200:in
      `install'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/installer/gem_installer.rb:54:in
      `install'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/installer/gem_installer.rb:16:in
      `install_from_spec'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/installer/parallel_installer.rb:155:in
      `do_install'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/installer/parallel_installer.rb:146:in
      `block in worker_pool'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/worker.rb:62:in
      `apply_func'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/worker.rb:57:in
      `block in process_queue'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/worker.rb:54:in
      `loop'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/worker.rb:54:in
      `process_queue'
      /layers/paketo-buildpacks_bundler/bundler/gems/bundler-2.4.6/lib/bundler/worker.rb:90:in
      `block (2 levels) in create_threads'

      An error occurred while installing mysql2 (0.5.5), and Bundler cannot continue.

      In Gemfile:
        mysql2
failed to execute bundle install output:

error: exit status 5
ERROR: failed to build: exit status 1
ERROR: failed to build: executing lifecycle: failed with status code: 51

image build

  1. build
    paketobuildpacks/builder:full builderでrails appのimage作成 
    $ pack build puma-sample --buildpack paketo-buildpacks/ruby --builder paketobuildpacks/builder:full
full: Pulling from paketobuildpacks/builder
e58c18cab017: Already exists

041be6a6e80e: Pull complete
4612107b91b7: Pull complete
273978fd99f5: Pull complete
4f4fb700ef54: Pull complete
Digest: sha256:6deb1900981341c9e0dd66537b20cb64fdb7f26111a46ceb3681ba6fdf9dfea0
Status: Downloaded newer image for paketobuildpacks/builder:full
full-cnb: Pulling from paketobuildpacks/run
e58c18cab017: Already exists
e5e9174b359f: Already exists
5e91d2c23726: Pull complete
9c0a2c4cca94: Pull complete
05f59ae6b933: Pull complete
ec4575052267: Pull complete
068822fb393b: Pull complete
Digest: sha256:8338a316a476ca8d9c8f2b82b59816c21ffce1863de45150de1229c56c747d0d
Status: Downloaded newer image for paketobuildpacks/run:full-cnb
===> ANALYZING
Previous image with name "puma-sample" not found
===> DETECTING
5 of 12 buildpacks participating
paketo-buildpacks/ca-certificates 3.5.1
paketo-buildpacks/mri             0.11.1
paketo-buildpacks/bundler         0.7.4
paketo-buildpacks/bundle-install  0.6.3
paketo-buildpacks/puma            0.4.15
===> RESTORING
===> BUILDING

Paketo Buildpack for CA Certificates 3.5.1
  https://github.com/paketo-buildpacks/ca-certificates
  Launch Helper: Contributing to layer
    Creating /layers/paketo-buildpacks_ca-certificates/helper/exec.d/ca-certificates-helper
Paketo Buildpack for MRI 0.11.1
  Resolving MRI version
    Candidate version sources (in priority order):
      Gemfile   -> "3.2.1"
      <unknown> -> ""

    Selected MRI version (using Gemfile): 3.2.1

  Executing build process
    Installing MRI 3.2.1
      Completed in 16.232s

  Generating SBOM for /layers/paketo-buildpacks_mri/mri
      Completed in 34ms

  Configuring build environment
    GEM_PATH         -> "/home/cnb/.local/share/gem/ruby/3.2.0:/layers/paketo-buildpacks_mri/mri/lib/ruby/gems/3.2.0"
    MALLOC_ARENA_MAX -> "2"

  Configuring launch environment
    GEM_PATH         -> "/home/cnb/.local/share/gem/ruby/3.2.0:/layers/paketo-buildpacks_mri/mri/lib/ruby/gems/3.2.0"
    MALLOC_ARENA_MAX -> "2"

Paketo Buildpack for Bundler 0.7.4
  Resolving Bundler version
    Candidate version sources (in priority order):
      Gemfile.lock -> "2.*.*"
      <unknown>    -> ""

    Selected bundler version (using Gemfile.lock): 2.4.6

  Executing build process
    Installing Bundler 2.4.6
      Completed in 1.763s

  Generating SBOM for /layers/paketo-buildpacks_bundler/bundler
      Completed in 5ms

  Configuring build environment
    GEM_PATH -> "$GEM_PATH:/layers/paketo-buildpacks_bundler/bundler"

  Configuring launch environment
    GEM_PATH -> "$GEM_PATH:/layers/paketo-buildpacks_bundler/bundler"

Paketo Buildpack for Bundle Install 0.6.3
  Executing launch environment install process
    Running 'bundle config --global clean true'
    Running 'bundle config --global path /layers/paketo-buildpacks_bundle-install/launch-gems'
    Running 'bundle config --global without development:test'
    Running 'bundle config --global cache_path --parseable'

    Running 'bundle install'
      Fetching gem metadata from https://rubygems.org/..........
      Resolving dependencies...

      <snip...>

      Fetching mysql2 0.5.5
      Installing logstash-event 1.2.02
      Fetching tzinfo 1.2.11
      Installing mysql2 0.5.5 with native extensions

      <snip...>

      Installing puma 4.3.12 with native extensions
      Fetching rails 6.0.6.1
      Installing rails 6.0.6.1
      Fetching bootsnap 1.16.0
      Installing bootsnap 1.16.0 with native extensions
      Bundle complete! 17 Gemfile dependencies, 70 gems now installed.
      Gems in the groups 'development' and 'test' were not installed.
      Bundled gems are installed into `/layers/paketo-buildpacks_bundle-install/launch-gems`
      Completed in 1m51.974s

  Generating SBOM for /layers/paketo-buildpacks_bundle-install/launch-gems
      Completed in 11.999s

  Configuring launch environment
    BUNDLE_USER_CONFIG -> "/layers/paketo-buildpacks_bundle-install/launch-gems/config"

Paketo Buildpack for Puma 0.4.15
  Assigning launch processes:
    web (default): bash -c bundle exec puma --bind tcp://0.0.0.0:${PORT:-9292}

===> EXPORTING
Adding layer 'paketo-buildpacks/ca-certificates:helper'
Adding layer 'paketo-buildpacks/mri:mri'
Adding layer 'paketo-buildpacks/bundler:bundler'
Adding layer 'paketo-buildpacks/bundle-install:launch-gems'
Adding layer 'launch.sbom'
Adding 1/1 app layer(s)
Adding layer 'launcher'
Adding layer 'config'
Adding layer 'process-types'
Adding label 'io.buildpacks.lifecycle.metadata'
Adding label 'io.buildpacks.build.metadata'
Adding label 'io.buildpacks.project.metadata'
Setting default process type 'web'
Saving puma-sample...
*** Images (8236d63db653):
      puma-sample
Adding cache layer 'paketo-buildpacks/mri:mri'
Adding cache layer 'paketo-buildpacks/bundler:bundler'
Adding cache layer 'cache.sbom'
Successfully built image puma-sample

  2. image確認

    $ docker images rails-api-server
REPOSITORY         TAG       IMAGE ID       CREATED        SIZE
rails-api-server   latest    635f3a7771df   43 years ago   956MB