Class: Dcmgr::Drivers::Raw

Inherits:
BackingStore show all
Includes:
Helpers::CliHelper, Logger
Defined in:
lib/dcmgr/drivers/raw.rb

Instance Method Summary collapse

Methods included from Helpers::CliHelper

#sh, #tryagain

Methods included from Logger

create, default_logdev, included

Methods inherited from BackingStore

#delete_snapshot, select_backing_store

Instance Method Details

#create_snapshot(ctx, snap_file) ⇒ Object 



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# File 'lib/dcmgr/drivers/raw.rb', line 43

def create_snapshot(ctx, snap_file)
  @volume      = ctx.volume

  logger.info("creating new snapshot: #{snap_file}")
  cp_sparse(vol_path, snap_file)
  if $?.exitstatus != 0
    raise "failed snapshot file : #{snap_file}"
  end
  du_hs(snap_file)

  logger.info("created new snapshot: #{snap_file}")
end

#create_volume(ctx, snap_file = nil) ⇒ Object 



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# File 'lib/dcmgr/drivers/raw.rb', line 9

def create_volume(ctx, snap_file = nil)
  @volume_id   = ctx.volume_id
  @volume      = ctx.volume
  @snapshot    = ctx.snapshot

  logger.info("creating new volume: #{@volume_id}")

  if @snapshot
    cp_sparse(snap_file, vol_path)
    if $?.exitstatus != 0
      raise "failed copy snapshot: #{snap_file}"
    end
  else
    unless File.exist?(vol_path)
      logger.info("creating parent filesystem(size:#{@volume[:size]}): #{vol_path}")

      sh("/bin/mkdir -p #{File.dirname(vol_path)}") unless File.directory?(File.dirname(vol_path))
      sh("/bin/dd if=/dev/zero of=#{vol_path} bs=1 count=0 seek=#{@volume[:size] * 1024 * 1024}")
      du_hs(vol_path)

      logger.info("create parent filesystem(size:#{@volume[:size]}): #{vol_path}")
    else
      raise "volume already exists: #{@volume_id}"
    end
  end

  logger.info("created new volume: #{@volume_id}")
end

#delete_volume(ctx) ⇒ Object 



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# File 'lib/dcmgr/drivers/raw.rb', line 38

def delete_volume(ctx)
  @volume = ctx.volume
  sh("/bin/rm %s", [vol_path]) if File.exists?(vol_path)
end