Class: Makitzo::Application

Inherits:
Object
  • Object
show all
Includes:
SSH::Multi
Defined in:
lib/makitzo/application.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from SSH::Multi

#multi_connect, #multi_session, #multi_ssh, #ssh_context_class

Constructor Details

#initialize ⇒ Application

Returns a new instance of Application.



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# File 'lib/makitzo/application.rb', line 10

def initialize
  @config = Config.new(self)
  @logger = Logging::Collector.new
  @root_directory = '.'
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/makitzo/application.rb', line 5

def config
  @config
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/makitzo/application.rb', line 6

def logger
  @logger
end

#query ⇒ Object

Returns the value of attribute query.



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# File 'lib/makitzo/application.rb', line 7

def query
  @query
end

#root_directory ⇒ Object

Returns the value of attribute root_directory.



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# File 'lib/makitzo/application.rb', line 8

def root_directory
  @root_directory
end

Instance Method Details

#compare(*command) ⇒ Object

Run a shell command on hosts and compare output



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# File 'lib/makitzo/application.rb', line 121

def compare(*command)
  command = command.join(' ')
  sessions = nil
  results, mutex = Hash.new { |h,k| h[k] = [] }, Mutex.new
  
  logger.silence do
    sessions = multi_session(target_hosts) do |session, host|
      result = session.exec(command)
      mutex.synchronize { results[result] << host }
    end
  end
  
  logger.log_command_line(command)
  
  sessions.each do |s|
    if s.connection_error
      logger.error "connection to #{s.host.name} failed: #{s.connection_error.class} (#{s.connection_error.message})"
    end
  end
  
  logger.info("#{results.length} unique response(s)")
  
  results.each do |result, hosts|
    hosts.each do |h|
      logger.info(h.name + ":")
    end
    logger.log_command_status(result)
  end
end

#create_migration(name) ⇒ Object 



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# File 'lib/makitzo/application.rb', line 59

def create_migration(name)
  generator = Migrations::Generator.new(self)
  generator.create_migration(name)
end

#exec(*command) ⇒ Object

Execute an aribtrary helper method on all target systems



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# File 'lib/makitzo/application.rb', line 45

def exec(*command)
  config.store.open do
    multi_session(target_hosts) { |session, host| session.send(*command) }
  end
end

#install ⇒ Object 



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# File 'lib/makitzo/application.rb', line 41

def install;      exec(:makitzo_install);   end

#invoke(command, *args) ⇒ Object 



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# File 'lib/makitzo/application.rb', line 25

def invoke(command, *args)
  raise ArgumentError, "unknown command: #{command}" unless valid_commands.include?(command)
  success = false

  old_wd = Dir.getwd
  Dir.chdir(@root_directory)
  success = send(command.to_sym, *args)

  result = @logger.result
  puts @logger.result unless result.length == 0
  
  success
ensure
  Dir.chdir(old_wd)
end

#list ⇒ Object

List the hosts which would be affected, taking into account any query parameters.



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# File 'lib/makitzo/application.rb', line 66

def list
  target_hosts.map { |h| h.name }.sort.each { |h| puts h }
end

#migrate ⇒ Object

Migrate all target systems



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# File 'lib/makitzo/application.rb', line 52

def migrate
  config.store.open do
    migrator = Migrations::Migrator.new(self)
    migrator.migrate(target_hosts)
  end
end

#shell(*command) ⇒ Object

Run a shell command on hosts



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# File 'lib/makitzo/application.rb', line 71

def shell(*command)
  multi_session(target_hosts) { |session, host| session.exec(command.join(' ')) }
end

#stream(io) ⇒ Object

read from IO and send commands to target hosts this is intended to be used non-interactively (e.g. with a pipe) TODO: other system operations should be rewritten to use the “shell” service as it remembers state such as working directory etc TODO: how to we specify which shell to open?! TODO: this should probably be extracted



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# File 'lib/makitzo/application.rb', line 81

def stream(io)
  reader = MultiplexedReader.new(io)
  multi_ssh(target_hosts) do |host, conn, error|
    logger.with_host(host) do
      if error
        logger.error("could not connect to host: #{error.message} (#{error.class})")
      else
        conn.open_channel do |ch|
          ch.send_channel_request("shell") do |ch, success|
            if success
              logger.info "shell opened"
              
              ch.on_data { |ch, data| }
              ch.on_close { logger.info "shell closed" }
              
              while line = reader.gets
                line.strip!
                logger.log_command_line(line)
                line += "\n"
                ch.send_data(line)
              end
              ch.send_data("exit\n")
            else
              logger.error "shell could not be opened"
            end
          end
        end
        
        conn.loop
      end
    end
  end
end

#sudo(*command) ⇒ Object

Run a shell command on hosts using sudo



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# File 'lib/makitzo/application.rb', line 116

def sudo(*command)
  multi_session(target_hosts) { |session, host| session.sudo { session.exec(command.join(' ')) } }
end

#target_hosts ⇒ Object 



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# File 'lib/makitzo/application.rb', line 16

def target_hosts
  query = @query || World::Query.all
  query.exec(config)
end

#uninstall ⇒ Object 



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# File 'lib/makitzo/application.rb', line 42

def uninstall;    exec(:makitzo_uninstall); end

#valid_commands ⇒ Object 



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# File 'lib/makitzo/application.rb', line 21

def valid_commands
  %w(install uninstall exec migrate create_migration list compare shell stream sudo)
end