ペパボで何人かハマってしまった人がいたので記事にしておく。
PuppetLabsのチケットにも登録されているが、Puppet 3.7.x (x >= 3) はRuby 2.2だとエラーになってしまう。
$ puppet --version
/Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/defaults.rb:488: warning: duplicated key at line 489 ignored: :queue_type
/Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor/safe_yaml/lib/safe_yaml/syck_node_monkeypatch.rb:42:in `<top (required)>': uninitialized constant Syck (NameError)
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor/safe_yaml/lib/safe_yaml.rb:197:in `<module:YAML>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor/safe_yaml/lib/safe_yaml.rb:132:in `<top (required)>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor/require_vendored.rb:4:in `<top (required)>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor.rb:40:in `require_libs'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/vendor.rb:53:in `load_vendored'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet.rb:172:in `<module:Puppet>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet.rb:29:in `<top (required)>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/lib/puppet/util/command_line.rb:12:in `<top (required)>'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/hfm/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/puppet-3.7.5/bin/puppet:7:in `<top (required)>'
from /Users/hfm/.rbenv/versions/2.2.1/bin/puppet:23:in `load'
from /Users/hfm/.rbenv/versions/2.2.1/bin/puppet:23:in `<main>'※ちなみに1行目のエラーはwarningなので（良くはないけど）エラーとは無関係
どうやらSyckに関わるエラーらしく、どうしてもRuby 2.2で動かしたい場合は、syck_node_monkeypatch.rbというファイルに更なるモンキーパッチを当てるという闇の道を歩まねばならない。
追記:
柴田さんから補足ツイートをもらったので引用。 safe_yamlに問題があるとのこと。つらい…
@hfm safe_yaml が腐ってるんだねぇ
— SHIBATA Hiroshi (@hsbt) 2015, 4月 9--- lib/puppet/vendor/safe_yaml/lib/safe_yaml/syck_node_monkeypatch.rb
+++ lib/puppet/vendor/safe_yaml/lib/safe_yaml/syck_node_monkeypatch.rb
@@ -39,5 +39,6 @@
if defined?(YAML::Syck::Node)
YAML::Syck.module_eval monkeypatch
else
+ require 'syck' if RUBY_VERSION >= '2.2'
Syck.module_eval monkeypatch
end
これじゃあまりにも辛いので、Puppet 3.7系を使う場合はおとなしくRuby 2.1系を選択するのが良さそう。
ちなみにこの問題はPuppet 4.x系では解決するらしい。 そしてPuppet 3.x系はRuby 2.2へのサポートに消極的なので、4.xが出るまで待とう。
Kylo Ginsberg added a comment - 2015/03/25 3:06 PM
… We’re not planning to backport 2.2 fixes to 3.x. It turns out that PR was necessary but not sufficient b/c the 3.x code base has more dependencies with 2.2 entanglements than does the 4.x code base.
※b/c は because の略