Ruby on Rails on AWS

ゴール

素の状態のAWS EC2にRuby on Railsをセットアップする。

事前準備

• AWS EC2が起動さす（AWS Linux）
• sshで入る

やったこと

rubyは最初から2.0が入ってたのでそのまま使う。
以下Railsインストール作業。

$ sudo yum update
$ sudo gem install rails #エラー
...
ERROR:  Error installing rails:
    ERROR: Failed to build gem native extension.

    /usr/bin/ruby2.0 extconf.rb
mkmf.rb can't find header files for ruby at /usr/share/ruby/include/ruby.h
$ sudo yum -y install ruby-devel
$ sudo yum -y install ruby-devel
$ sudo yum -y install gcc
$ sudo yum -y install sqlite-devel
$ sudo yum -y install gcc-c++ 
$ sudo gem install rails #ちょっと進んだ
...
Building nokogiri using packaged libraries.
checking for gzdopen() in -lz... no
zlib is missing; necessary for building libxml2
*** 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.

nokogiriがビルドできてないらしい。リンクページによると、

Troubleshooting Ubuntu / Debian Installation
It’s possible that you don’t have the zlib development header files installed on your system.

怪しい。探してみる。

$ yum search zlib
...
zlib-devel.x86_64 : Header files and libraries for Zlib development

入れてみる。

$ sudo yum install -y zlib-devel.x86_64
$ sudo gem install rails #ちょっと進んだ2
...
Running 'patch' for libxml2 2.9.2... ERROR, review '/usr/local/share/ruby/gems/2.0/gems/nokogiri-1.6.6.2/ext/nokogiri/tmp/x86_64-redhat-linux-gnu/ports/libxml2/2.9.2/patch.log' to see what happened.
*** extconf.rb failed ***

patch.log見てみる。patchが入ってなかった。入れる。

$ sudo yum install -y patch
$ sudo gem install rails #OK ぽい
...
Done installing documentation for nokogiri, loofah, rails-html-sanitizer, rails-deprecated_sanitizer, rails-dom-testing, builder, erubis, actionview, actionpack, activemodel, arel, activerecord, globalid, activejob, mime-types, mail, actionmailer, rake, thor, railties, bundler, hike, multi_json, tilt, sprockets, sprockets-rails, rails after 396 seconds
27 gems installed

$ rails -v
Rails 4.2.0

Done!