RSpecを使ってDNSのテストを自動で実施する方法

DNSのテストを素早く回すことができるrspec-dnsというのがあるので紹介する。 これを使えば、DNSを変更するときにだいぶ安心できるはず。

使うもの

• ruby
• rspec
• rspec-dns

どのように書くのか？

次のように update_config でDNSを指定する。(config/dns.ymlというのを更新するので、なにもやらなければ、config/dns.ymlに記載されているまま) レコードごとにspecを記載していく。 複数のDNSをテストしたい場合は、 update_config でDNSを指定していく。

実行のやり方

• git clone
  • % git clone -b example https://github.com/otahi/rspec-dns.git
• move into example directory and run
  • % cd rspec-dns/example
  • % rvm use 1.9.3
  • % bundle install --path=vendor/bundle --binstubs=vendor/
  • % bundle exec rspec -c -f doc

どのような出力になるか？

% bundle exec rspec -c -f doc 

github.com
  should have the correct dns entries with {:type=>"A", :address=>"192.30.252.128"}
  should have the correct dns entries with {:type=>"A", :address=>"192.30.252.129"}
  should have the correct dns entries with {:type=>"A", :address=>"192.30.252.130"}
  should have the correct dns entries with {:type=>"A", :address=>"192.30.252.131"}
  should have the correct dns entries with {:type=>"A", :address=>"204.232.175.90"}
  should have the correct dns entries with {:type=>"A", :address=>"207.97.227.239"}
  should have the correct dns entries with {:type=>"MX", :exchange=>"ASPMX.L.GOOGLE.com", :preference=>10}
  should have the correct dns entries with {:type=>"MX", :exchange=>"ALT1.ASPMX.L.GOOGLE.com", :preference=>20}
  should have the correct dns entries with {:type=>"MX", :exchange=>"ALT2.ASPMX.L.GOOGLE.com", :preference=>20}
  should have the correct dns entries with {:type=>"MX", :exchange=>"ASPMX2.GOOGLEMAIL.com", :preference=>30}
  should have the correct dns entries with {:type=>"MX", :exchange=>"ASPMX3.GOOGLEMAIL.com", :preference=>30}
  should have the correct dns entries with {:type=>"NS", :name=>"ns1.p16.dynect.net"}
  should have the correct dns entries with {:type=>"NS", :name=>"ns2.p16.dynect.net"}
  should have the correct dns entries with {:type=>"NS", :name=>"ns3.p16.dynect.net"}
  should have the correct dns entries with {:type=>"NS", :name=>"ns4.p16.dynect.net"}
  should have the correct dns entries with {:type=>"TXT", :data=>"v=spf1 include:_spf.google.com include:_netblocks.zdsys.com include:sendgrid.net include:mailgun.org include:smtp.github.com ~all"}
  should have the correct dns entries with {:type=>"SOA", :mname=>"ns1.p16.dynect.net", :rname=>"hostmaster.github.com", :refresh=>3600, :retry=>600, :expire=>604800, :minimum=>60}

Finished in 2.4 seconds
17 examples, 0 failures
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Reference

• rspec-dns