Class: LVM::LVM

Inherits:
Object
  • Object
show all
Defined in:
lib/lvm.rb

Constant Summary collapse

VALID_OPTIONS = 
%i{
  command
  version
  debug
  additional_arguments
}.freeze
DEFAULT_COMMAND = 
"/sbin/lvm".freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ LVM

Returns a new instance of LVM.



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# File 'lib/lvm.rb', line 25

def initialize(options = {})
  # handy, thanks net-ssh!
  invalid_options = options.keys - VALID_OPTIONS
  if invalid_options.any?
    raise ArgumentError, "invalid option(s): #{invalid_options.join(", ")}"
  end

  @command = options[:command] || DEFAULT_COMMAND

  # default to loading attributes for the current version
  options[:version] ||= version
  options[:debug] ||= false

  @logical_volumes = LogicalVolumes.new(options)
  @volume_groups = VolumeGroups.new(options)
  @physical_volumes = PhysicalVolumes.new(options)

  if block_given?
    yield self
  else
    self
  end
end

Instance Attribute Details

#additional_arguments ⇒ Object (readonly)

Returns the value of attribute additional_arguments.



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# File 'lib/lvm.rb', line 14

def additional_arguments
  @additional_arguments
end

#command ⇒ Object (readonly)

Returns the value of attribute command.



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# File 'lib/lvm.rb', line 10

def command
  @command
end

#logical_volumes ⇒ Object (readonly)

Returns the value of attribute logical_volumes.



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# File 'lib/lvm.rb', line 11

def logical_volumes
  @logical_volumes
end

#physical_volumes ⇒ Object (readonly)

Returns the value of attribute physical_volumes.



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# File 'lib/lvm.rb', line 13

def physical_volumes
  @physical_volumes
end

#volume_groups ⇒ Object (readonly)

Returns the value of attribute volume_groups.



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# File 'lib/lvm.rb', line 12

def volume_groups
  @volume_groups
end

Class Method Details

.parse_version(raw) ⇒ Object

Extract the canonical X.Y.Z or X.Y.Z(N) version key used by chef-ruby-lvm-attrib attribute directories.



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# File 'lib/lvm.rb', line 67

def self.parse_version(raw)
  match = raw.to_s.match(/(\d+\.\d+\.\d+)(?:\((\d+))?/)
  return raw.to_s if match.nil?

  match[2] ? "#{match[1]}(#{match[2]})" : match[1]
end

Instance Method Details

#raw(args) ⇒ Object 



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# File 'lib/lvm.rb', line 49

def raw(args)
  output = []
  External.cmd("#{@command} #{args}") do |line|
    output << line
  end
  if block_given?
    output.each { |l| yield l }
  else
    output.join
  end
end

#userland ⇒ Object

helper methods



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# File 'lib/lvm.rb', line 75

def userland
  userland = UserLand.new
  raw("version") do |line|
    case line
    when /^\s+LVM version:\s+([0-9].*)$/
      userland.lvm_version = $1
    when /^\s+Library version:\s+([0-9].*)$/
      userland.library_version = $1
    when /^\s+Driver version:\s+([0-9].*)$/
      userland.driver_version = $1
    end
  end

  userland
end

#version ⇒ Object 



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# File 'lib/lvm.rb', line 61

def version
  self.class.parse_version(userland.lvm_version)
end