Class: Formatron::Util::SSH

Inherits:
Object
  • Object
show all
Defined in:
lib/formatron/util/ssh.rb

Overview

Perform commands on chef nodes over SSH

Class Method Summary collapse

Class Method Details

.exec(hostname:, bastion_hostname:, user:, key:, command:) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/AbcSize



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# File 'lib/formatron/util/ssh.rb', line 11

def self.exec(hostname:, bastion_hostname:, user:, key:, command:)
  proxy_command = Net::SSH::Proxy::Command.new(
    "ssh -i #{key} -o StrictHostKeyChecking=no " \
    "#{user}@#{bastion_hostname} -W %h:%p"
  ) unless hostname.eql? bastion_hostname
  Net::SSH.start(
    hostname,
    user,
    keys: [key],
    proxy: proxy_command,
    paranoid: false
  ) do |ssh|
    ssh.open_channel do |channel|
      channel.exec(command) do |_ch, success|
        fail "failed to start command: #{command}" unless success
        channel.on_request('exit-status') do |_ch, data|
          status = data.read_long
          fail "`#{command}` exited with code #{status}" if status != 0
        end
        channel.on_data do |_ch, data|
          data.each_line do |line|
            Formatron::LOG.info { line.chomp }
          end
        end
        channel.on_extended_data do |_ch, _type, data|
          data.each_line do |line|
            Formatron::LOG.info { line.chomp }
          end
        end
      end
    end
    ssh.loop
  end
end