bundle installが通らずエラーがでます。

Question

ruby on rails で　bundle install をした結果このようなエラーが表示されました。

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

An error occurred while installing mysql2 (0.3.18), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.18' --source 'https://rubygems.org/'` succeeds before bundling.

どのようにすれば解決できますか？

エラーの全て

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...
Using rake 12.3.2
Using concurrent-ruby 1.1.4
Using i18n 1.5.3
Using minitest 5.11.3
Using thread_safe 0.3.6
Using tzinfo 1.2.5
Using activesupport 5.0.7.1
Using builder 3.2.3
Using erubis 2.7.0
Using mini_portile2 2.4.0
Using nokogiri 1.10.1
Using rails-dom-testing 2.0.3
Using crass 1.0.4
Using loofah 2.2.3
Using rails-html-sanitizer 1.0.4
Using actionview 5.0.7.1
Using rack 2.0.6
Using rack-test 0.6.3
Using actionpack 5.0.7.1
Using nio4r 2.3.1
Using websocket-extensions 0.1.3
Using websocket-driver 0.6.5
Using actioncable 5.0.7.1
Using globalid 0.4.2
Using activejob 5.0.7.1
Using mini_mime 1.0.1
Using mail 2.7.1
Using actionmailer 5.0.7.1
Using activemodel 5.0.7.1
Using arel 7.1.4
Using activerecord 5.0.7.1
Using bindex 0.5.0
Using bundler 1.16.6
Using byebug 10.0.2
Using coffee-script-source 1.12.2
Using execjs 2.7.0
Using coffee-script 2.4.1
Using method_source 0.9.2
Using thor 0.20.3
Using railties 5.0.7.1
Using coffee-rails 4.2.2
Using ffi 1.10.0
Using multi_json 1.13.1
Using jbuilder 2.8.0
Using jquery-rails 4.3.3
Using rb-fsevent 0.10.3
Using rb-inotify 0.10.0
Using listen 3.0.8
Fetching mysql2 0.4.10
Installing mysql2 0.4.10 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /home/ec2-user/.rvm/gems/ruby-2.5.3/gems/mysql2-0.4.10/ext/mysql2
/home/ec2-user/.rvm/rubies/ruby-2.5.3/bin/ruby -r ./siteconf20190205-8430-9sjihd.rb extconf.rb --with-opt-lib=/usr/local/opt/openssl/lib
--with-opt-include=-I/usr/local/opt/openssl/include
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
checking for rb_big_cmp()... yes
-----
Using mysql_config at /usr/bin/mysql_config
-----
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. You may need to 'apt-get install libmysqlclient-dev' or 'yum install mysql-devel', and try again.
-----
*** 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=${opt-dir}/include
        --with-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/home/ec2-user/.rvm/rubies/ruby-2.5.3/bin/$(RUBY_BASE_NAME)
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
        --with-mysql-config
        --without-mysql-config

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

  /home/ec2-user/.rvm/gems/ruby-2.5.3/extensions/x86_64-linux/2.5.0/mysql2-0.4.10/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/ec2-user/.rvm/gems/ruby-2.5.3/gems/mysql2-0.4.10 for inspection.
Results logged to /home/ec2-user/.rvm/gems/ruby-2.5.3/extensions/x86_64-linux/2.5.0/mysql2-0.4.10/gem_make.out

An error occurred while installing mysql2 (0.4.10), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.4.10' --source 'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  mysql2

Gemfileはこれです。

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.6'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.3.18', '< 0.5'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '~> 3.0.5'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Answer 1

エラー内にヒントがあります。

mysql.h is missing. You may need to 'apt-get install libmysqlclient-dev' or 'yum install mysql-devel', and try again.

Comments

[hazu]

yum install mysql-devel
と入力すると以下のエラーが発生しました。

Loaded plugins: priorities, update-motd, upgrade-helper
You need to be root to perform this command.

「rootになる必要がある」とはどう言うことですか？

[kazto]

パッケージをインストールするには、`root`という管理者権限を持ったユーザになる必要があります。
rootをご存知無いということは、お使いのマシンはご自身でインストールしたものではない感じでしょうか。