Class: CopySnapshot

Inherits:
Ec2Script show all
Defined in:
lib/scripts/ec2/copy_snapshot.rb

Overview

Copy a given snapshot to another region

  • start up instance in source-region, create volume from snapshot, attach volume, and mount it

  • start up instance in destination-region, create empty volume of same size, attache volume, and mount it

  • copy the destination key to the source instance

  • perform an rsynch sync -PHAXaz –rsh “ssh -i /home/$src_user/.ssh/id_$dst_keypair” –rsync-path “sudo rsync” $src_dir/ $dst_user@$dst_public_fqdn:$dst_dir/

  • create a snapshot of the volume

  • clean-up everything

Defined Under Namespace

Classes: CopySnapshotState, DataCopiedState, InitialState, KeyInPlaceState, SnapshotCreatedState, SourceCleanedUpState, SourceInstanceLaunchedState, SourceVolumeReadyState, TargetInstanceLaunchedState, TargetVolumeReadyState

Instance Method Summary collapse

Methods inherited from Ec2Script

#get_execution_result, #post_message, #register_progress_message_listener, #register_state_change_listener, #start_script

Constructor Details

#initialize(input_params) ⇒ CopySnapshot

context information needed

  • the EC2 credentials (see #Ec2Script)

  • snapshot_id => The ID of the snapshot to be downloaded

  • target_ec2_handler => The EC2 handler connected to the region where the snapshot is being copied to

  • source_ssh_username => user name to connect to the source instance (default = root)

  • source_key_name => Key name of the instance that manages the snaphot-volume in the source region

  • source_ssh_key_data => Key information for the security group that starts the AMI [if not set, use ssh_key_files]

  • source_ssh_key_file => Key information for the security group that starts the AMI

  • target_ssh_username => user name to connect to the target instance (default = root)

  • target_key_name => Key name of the instance that manages the snaphot-volume in the target region

  • target_ssh_key_data => Key information for the security group that starts the AMI [if not set, use ssh_key_files]

  • target_ssh_key_file => Key information for the security group that starts the AMI

  • source_ami_id => ID of the AMI to start in the source region

  • target_ami_id => ID of the AMI to start in the target region



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# File 'lib/scripts/ec2/copy_snapshot.rb', line 33

def initialize(input_params)
  super(input_params)
end

Instance Method Details

#check_input_parameters ⇒ Object 



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# File 'lib/scripts/ec2/copy_snapshot.rb', line 37

def check_input_parameters()
  local_ec2_helper = Ec2Helper.new(@input_params[:ec2_api_handler])
  if !local_ec2_helper.check_open_port('default', 22)
    raise Exception.new("Port 22 must be opened for security group 'default' to connect via SSH in source-region")
  end
  remote_ec2_helper = Ec2Helper.new(@input_params[:target_ec2_handler])
  if !remote_ec2_helper.check_open_port('default', 22)
    raise Exception.new("Port 22 must be opened for security group 'default' to connect via SSH in target-region")
  end
  if @input_params[:source_ssh_username] == nil
    @input_params[:source_ssh_username] = "root"
  end
  if @input_params[:target_ssh_username] == nil
    @input_params[:target_ssh_username] = "root"
  end
end

#load_initial_state ⇒ Object

Load the initial state for the script. Abstract method to be implemented by extending classes.



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# File 'lib/scripts/ec2/copy_snapshot.rb', line 56

def load_initial_state()
  CopySnapshotState.load_state(@input_params)
end