Class: LinuxAdmin::LogicalVolume

Inherits:
LinuxAdmin show all
Defined in:
lib/linux_admin/logical_volume.rb

Constant Summary

Constants inherited from LinuxAdmin

VERSION

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Common

#cmd, #run, #run!

Constructor Details

#initialize(args = {}) ⇒ LogicalVolume

other fields available: logical volume access logical volume status internal logical volume number open count of logical volume current logical extents associated to logical volume allocated logical extents of logical volume allocation policy of logical volume read ahead sectors of logical volume major device number of logical volume minor device number of logical volume



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# File 'lib/linux_admin/logical_volume.rb', line 29

def initialize(args = {})
  @name         = args[:name]
  @volume_group = args[:volume_group]
  @sectors      = args[:sectors]
end

Instance Attribute Details

#name ⇒ Object

logical volume name



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# File 'lib/linux_admin/logical_volume.rb', line 9

def name
  @name
end

#sectors ⇒ Object

logical volume size in sectors



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# File 'lib/linux_admin/logical_volume.rb', line 15

def sectors
  @sectors
end

#volume_group ⇒ Object

volume group name



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# File 'lib/linux_admin/logical_volume.rb', line 12

def volume_group
  @volume_group
end

Class Method Details

.create(name, vg, size) ⇒ Object 



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# File 'lib/linux_admin/logical_volume.rb', line 41

def self.create(name, vg, size)
  self.scan # initialize local logical volumes
  run!(cmd(:lvcreate),
      :params => { '-n' => name, nil => vg.name, '-L' => size})
  lv = LogicalVolume.new :name => name,
                         :volume_group => vg,
                         :sectors => size
  @lvs << lv
  lv
end

.scan ⇒ Object 



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# File 'lib/linux_admin/logical_volume.rb', line 52

def self.scan
  @lvs ||= begin
    vgs = VolumeGroup.scan
    lvs = []

    out = run!(cmd(:lvdisplay), :params => { '-c' => nil}).output

    out.each_line do |line|
      fields = line.split(':')
      vgname = fields[1] 
      vg = vgs.find { |vg| vg.name == vgname }

      lvs << LogicalVolume.new(:name         => fields[0],
                               :volume_group => vg,
                               :sectors      => fields[6].to_i)
    end

    lvs
  end
end

Instance Method Details

#extend_with(vg) ⇒ Object 



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# File 'lib/linux_admin/logical_volume.rb', line 35

def extend_with(vg)
  run!(cmd(:lvextend),
      :params => [self.name, vg.name])
  self
end