Class: OpzWorks::Commands::SSH

Inherits:
Object
  • Object
show all
Defined in:
lib/opzworks/commands/ssh.rb

Class Method Summary collapse

Class Method Details



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# File 'lib/opzworks/commands/ssh.rb', line 13

def self.banner
  'Generate and update SSH configuration files'
end

.runObject



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# File 'lib/opzworks/commands/ssh.rb', line 17

def self.run
  options = Trollop.options do
    banner <<-EOS.unindent
      #{SSH.banner}

        opzworks ssh {stack1} {stack2} {...}

      The stack name can be passed as any unique regex. If no
      arguments are passed, the command will iterate over all stacks.

      Options:
    EOS
    opt :update, 'Update ~/.ssh/config directly'
    opt :backup, 'Backup old SSH config before updating'
    opt :quiet, 'Use SSH LogLevel quiet', default: true
    opt :private, 'Return private IPs, rather than the default of public', default: false
    opt :raw, 'Return only raw IPs rather than .ssh/config format output', default: false
  end

  config = OpzWorks.config
  client = Aws::OpsWorks::Client.new(region: config.aws_region, profile: config.aws_profile)

  stacks     = []
  stack_data = client.describe_stacks

  if ARGV.empty?
    stack_data[:stacks].each { |stack| stacks.push(stack) }
  else
    ARGV.each do |arg|
      stack_data[:stacks].each do |stack|
        stacks.push(stack) if stack[:name] =~ /#{arg}/
      end
    end
  end

  stacks.each do |stack|
    instances   = []
    stack_name  = ''

    stack_name = stack[:name].gsub('::', '-')

    result = client.describe_instances(stack_id: stack[:stack_id])
    instances += result.instances.select { |i| i[:status] != 'stopped' }

    instances.map! do |instance|
      ip = if options[:private]
             instance[:private_ip]
           else
             instance[:elastic_ip].nil? ? instance[:public_ip] : instance[:elastic_ip]
           end

      if options[:raw]
        puts ip
      else
        next if ip.nil?
        parameters = {
          'Host'     => "#{instance[:hostname]}-#{stack_name}",
          'HostName' => ip,
          'User'     => config.ssh_user_name
        }
        parameters['LogLevel'] = 'quiet' if options[:quiet]
        parameters.map { |param| param.join(' ') }.join("\n  ")
      end
    end

    next if options[:raw]
    new_contents = "#{instances.join("\n")}\n"

    if options[:update]
      ssh_config = "#{ENV['HOME']}/.ssh/config"
      old_contents = File.read(ssh_config)

      if options[:backup]
        backup_name = ssh_config + '.backup'
        File.open(backup_name, 'w') { |file| file.puts old_contents }
      end

      File.open(ssh_config, 'w') do |file|
        file.puts old_contents.gsub(
          /\n?\n?#{SSH_PREFIX}.*#{SSH_POSTFIX}\n?\n?/m,
          ''
        )
        file.puts new_contents
      end

      puts "Successfully updated #{ssh_config} with #{instances.length} instances!"
    else
      puts new_contents.strip
    end
  end
end