Class: VagrantPlugins::ProviderKvm::Util::DiskInfo

Inherits:
Object
  • Object
show all
Includes:
Errors
Defined in:
lib/vagrant-kvm/util/disk_info.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(vol_path) ⇒ DiskInfo

Returns a new instance of DiskInfo.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 9

def initialize(vol_path)
  logger = Log4r::Logger.new("vagrant::kvm::util::disk_info")
  # default values
  @capacity = {:size => 10, :unit => 'G'}
  @backing = nil
  @cluster = nil
  begin
    diskinfo = %x[qemu-img info #{vol_path}]
    diskinfo.each_line do |line|
      case line
      when /^file format:/
        result = line.match(%r{file format:\s+(?<format>(\w+))})
        @type = result[:format]
      when /virtual size:/
        result = line.match(%r{virtual size:\s+(?<size>\d+(\.\d+)?)(?<unit>.)\s+\((?<bytesize>\d+)\sbytes\)})
        # always take the size in bytes to avoid conversion
        @capacity = {:size => result[:bytesize], :unit => "B"}
      when /^disk size:/
        result = line.match(%r{disk size:\s+(?<size>\d+(\.\d+)?)(?<unit>.)})
        @size = {:size => result[:size], :unit => result[:unit]}
      when /^backing file:/
        result = line.match(%r{backing file:\s+(?<file>(\S+))})
        @backing = result[:file]
      when /^cluster[_ ]size:/
        result = line.match(%r{cluster[_ ]size:\s+(?<size>(\d+))})
        @cluster = result[:size]
      end
    end
  rescue Errors::KvmFailedCommand => e
    logger.error 'Failed to find volume size. Using defaults.'
    logger.error e
  end
end

Instance Attribute Details

#backing ⇒ Object (readonly)

Returns the value of attribute backing.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 7

def backing
  @backing
end

#capacity ⇒ Object (readonly)

Returns the value of attribute capacity.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 7

def capacity
  @capacity
end

#cluster ⇒ Object (readonly)

Returns the value of attribute cluster.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 7

def cluster
  @cluster
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 7

def size
  @size
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/vagrant-kvm/util/disk_info.rb', line 7

def type
  @type
end