Class: Fission::Action::Snapshot::Reverter

Inherits:
Object
  • Object
show all
Defined in:
lib/fission/action/snapshot/reverter.rb

Instance Method Summary collapse

Constructor Details

#initialize(vm) ⇒ Reverter

Internal: Creates a new SnapshotReverter object. This accepts a VM object.

vm - An instance of VM

Examples:

Fission::Action::SnapshotReverter.new @my_vm

Returns a new SnapshotReverter object



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# File 'lib/fission/action/snapshot/reverter.rb', line 17

def initialize(vm)
  @vm = vm
end

Instance Method Details

#revert_to_snapshot(name) ⇒ Object

Public: Reverts the VM to the specified snapshot. The snapshot to revert to must exist and the Fusion GUI must not be running.

name - The snapshot name to revert to.

Examples

@reverter.revert_to_snapshot('foo_snap_1')

Returns a Response with the result. If successful, the Response’s data attribute will be nil. If there is an error, an unsuccessful Response will be returned.



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# File 'lib/fission/action/snapshot/reverter.rb', line 33

def revert_to_snapshot(name)
  unless @vm.exists?
    return Response.new :code => 1, :message => 'VM does not exist'
  end

  if Fusion.running?
    message = 'It looks like the Fusion GUI is currently running.  '
    message << 'A VM cannot be reverted to a snapshot when the Fusion GUI is running.  '
    message << 'Exit the Fusion GUI and try again.'
    return Response.new :code => 1, :message => message
  end

  conf_file_response = @vm.conf_file
  return conf_file_response unless conf_file_response.successful?

  snapshots_response = @vm.snapshots
  return snapshots_response unless snapshots_response.successful?

  unless snapshots_response.data.include? name
    message = "Unable to find a snapshot named '#{name}'."
    return Response.new :code => 1, :message => message
  end

  command = "#{vmrun_cmd} revertToSnapshot "
  command << "'#{conf_file_response.data}' \"#{name}\" 2>&1"

  command_exec = Fission::Action::ShellExecutor.new command
  Response.from_shell_executor command_exec.execute
end