Class: Dcmgr::Drivers::Zfs

Inherits:
BackingStore show all
Includes:
Helpers::CliHelper, Logger
Defined in:
lib/dcmgr/drivers/zfs.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, zsnap_file) ⇒ Object 



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# File 'lib/dcmgr/drivers/zfs.rb', line 64

def create_snapshot(ctx, zsnap_file)
  @snapshot_id = ctx.snapshot_id
  @destination = ctx.destination
  @snapshot    = ctx.snapshot
  @volume      = ctx.volume

  vol_path = "#{@volume[:storage_node][:export_path]}/#{@volume[:uuid]}"
  sh("/usr/sbin/zfs snapshot %s@%s", [vol_path, @snapshot[:uuid]])
  sh("/usr/sbin/zfs send %s@%s > %s", [vol_path, @snapshot[:uuid], zsnap_file])
  sh("/usr/sbin/zfs destroy %s@%s", [vol_path, @snapshot[:uuid]])
end

#create_volume(ctx, zsnap_file) ⇒ Object 



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# File 'lib/dcmgr/drivers/zfs.rb', line 10

def create_volume(ctx, zsnap_file)
  @volume_id   = ctx.volume_id
  @volume      = ctx.volume
  @snapshot    = ctx.snapshot
  @destination = ctx.destination

  ### sta_handler :create_volume
  vol_path = "#{@volume[:storage_node][:export_path]}/#{@volume[:uuid]}"
  sh("/usr/sbin/zfs list %s", [File.dirname(vol_path)])
  if $?.exitstatus != 0
    # create parent filesystem
    sh("/usr/sbin/zfs create -p %s", [File.dirname(vol_path)])
    logger.info("create parent filesystem: #{File.dirname(vol_path)}")
  end

  if @snapshot
    # create volume from snapshot
    if File.exists?(zsnap_file)
      sh("/usr/sbin/zfs receive %s < %s", [vol_path, zsnap_file])
      if $?.exitstatus != 0
        raise "volume already exists: #{@volume_id}"
      end
    else
      raise "snapshot file isn't exists: #{zsnap_file}"
    end

    sh("/usr/sbin/zfs destroy %s@%s", [vol_path, @snapshot[:uuid]])
    if $?.exitstatus != 0
      raise "volume snapshot has not deleted: #{@volume_id}@#{@snapshot[:uuid]}"
    end
  else
    # create volume
    #sh("/usr/sbin/zfs create -p -V %s %s", ["#{@volume[:size]}m", vol_path])
    # thin provisioning
    sh("/usr/sbin/zfs create -p -s -V %s %s", ["#{@volume[:size]}m", vol_path])
    if $?.exitstatus != 0
      raise "volume already exists: #{@volume_id}"
    end
  end
  
  sh("/usr/sbin/zfs list %s", [vol_path])
  if $?.exitstatus != 0
    raise "volume has not be created: #{@volume_id}"
  end

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

#delete_volume(ctx) ⇒ Object 



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# File 'lib/dcmgr/drivers/zfs.rb', line 59

def delete_volume(ctx)
  @volume = ctx.volume
  sh("/usr/sbin/zfs destroy %s", ["#{@volume[:storage_node][:export_path]}/#{@volume[:uuid]}"])
end