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sshkitを単体で使ってみる

Last updated at Posted at 2014-01-14

capistrano3でよく使うrun_locallyやon hostsなどのDSLは、capistranoが内部で使っているsshkitが提供しています。

capistranoのようにデプロイに特化しているわけでもないけど、localとremoteを簡単に区別し、さらに複数台相手に同じ処理をさせたい場合などに、sshkitは使えると思います。。

githubにgetting started的なものがないので、コードを見ながらサンプルを書いてみました。

Gemfile
source 'https://rubygems.org'
gem 'sshkit'
sshkit_sample.rb
require 'sshkit'
require 'sshkit/dsl'

SSHKit.config.output_verbosity = Logger::DEBUG

remote_host = SSHKit::Host.new('192.168.20.10')
remote_host.user = "vagrant"
remote_host.ssh_options = {
  keys: %w(./id_rsa),
  auth_methods: %w(publickey)
}

on remote_host do
  execute :ls
end

run_locally do
  execute :whoami
end

実行結果

$ ruby sshkit_sample.rb
INFO [21c7bce1] Running /usr/bin/env ls on 192.168.20.10
DEBUG [21c7bce1] Command: /usr/bin/env ls
INFO [21c7bce1] Finished in 0.182 seconds with exit status 0 (successful).
DEBUG [21c7bce1] apt.sh
DEBUG [21c7bce1] build_time.sh
DEBUG [21c7bce1] cleanup.sh
DEBUG [21c7bce1] sudo.sh
DEBUG [21c7bce1] vagrant.sh
DEBUG [21c7bce1] vbox.sh
INFO [21c7bce1] Finished in 0.182 seconds with exit status 0 (successful).
INFO [69ec5244] Running /usr/bin/env whoami on
DEBUG [69ec5244] Command: /usr/bin/env whoami
DEBUG [69ec5244] cazador
INFO [69ec5244] Finished in 0.006 seconds with exit status 0 (successful).

ちなみにon hogehogeやrun_locallyの実装はsshkit/dsl.rbにあります。

公式にサンプル があるので、参考になると思います。

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