Class: IncrementalBackup::Task

Inherits:
Object
  • Object
show all
Defined in:
lib/incremental_backup/task.rb

Constant Summary collapse

LOG_FILENAME = 
'log'
NUM_LOG_FILES = 
10

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|settings| ... } ⇒ Task

Returns a new instance of Task.

Yields:



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# File 'lib/incremental_backup/task.rb', line 12

def initialize(&block)
  self.settings = TaskSettings.new
  yield settings
end

Instance Attribute Details

#settings ⇒ Object

Returns the value of attribute settings.



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# File 'lib/incremental_backup/task.rb', line 10

def settings
  @settings
end

Instance Method Details

#logger ⇒ Object 



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# File 'lib/incremental_backup/task.rb', line 73

def logger
  @logger ||= Logger.new(File.join(settings.settings_path, LOG_FILENAME), NUM_LOG_FILES)
end

#run ⇒ Object

Perform the backup



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# File 'lib/incremental_backup/task.rb', line 18

def run

  # Validate - this will throw an exception if settings are not valid
  validate_settings

  # Run everything inside a lock, ensuring that only one instance of this
  # task is running.
  Lock.create(self) do

    # Find the schedule to run
    schedule = find_schedule
    unless schedule
      logger.info "No backup needed - exiting"
      return
    end

    logger.info "Starting #{schedule} backup to #{settings.remote_server}"

    # Paths and other options
    timestamp = Time.now.strftime('backup_%Y-%m-%d-T%H-%M-%S')
    current_path = File.join(settings.remote_path, 'current')
    progress_path = File.join(settings.remote_path, 'incomplete')
    complete_path = File.join(schedule_path(schedule), timestamp)
     = "#{settings.remote_user}@#{settings.remote_server}"
    rsync_path = "#{}:#{progress_path}"

    # Make schedule folder
    execute_ssh "mkdir --verbose --parents #{schedule_path schedule}"

    # Rsync
    Rsync.execute(logger, settings.local_path, rsync_path, {
      exclude_file: settings.exclude_file,
      link_dest: current_path,
      max_upload_speed: settings.max_upload_speed,
      max_download_speed: settings.max_download_speed
    })

    # shuffle backups around
    logger.info "Do the backup shuffle"
    execute_ssh [
      "mv --verbose            #{progress_path} #{complete_path}",
      "rm --verbose --force    #{current_path}",
      "ln --verbose --symbolic #{complete_path} #{current_path}",
    ]

    delete_old_backups schedule

    logger.info "#{schedule} backup done"
  end

rescue Exception => exception
  logger.error exception.message
  logger.error exception.backtrace
end