Class: Domain

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ Domain 



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# File 'lib/vamboo/domainlist.rb', line 28

def initialize(name)
  @name = name
  conn = Libvirt::open("qemu:///system")
  domain = conn.lookup_domain_by_name(@name)
  xml = REXML::Document.new(domain.xml_desc)
  @vmhd_pathes = xml.elements.to_a("domain/devices/disk[@type='file']").map do |dev|
    dev.elements['source'].attributes['file']
  end
  conn.close
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/vamboo/domainlist.rb', line 26

def name
  @name
end

#vmhd_pathes ⇒ Object (readonly)

Returns the value of attribute vmhd_pathes.



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# File 'lib/vamboo/domainlist.rb', line 26

def vmhd_pathes
  @vmhd_pathes
end

Instance Method Details

#backup(target_path) ⇒ Object 



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# File 'lib/vamboo/domainlist.rb', line 39

def backup(target_path)
  log = Logger.new("#{target_path}/#{@name}.log")
  log.formatter = proc do |severity, datetime, progname, msg|
          "#{@name}:#{datetime}: #{msg}\n"
  end


  conn = Libvirt::open("qemu:///system")
  domain = conn.lookup_domain_by_name(@name)
  tmp_path = "#{Vamboo.default_vamboo_home}/#{@name}"
  
  log.info("Start backup")
  active = domain.active?
  if active
    log.info("Shutdown")
    domain.shutdown
    sleep(10) while domain.active?
  end

  log.info("Dump xml")
  FileUtils.mkdir_p(tmp_path)
  File.open("#{tmp_path}/#{@name}.xml", "w") do |file|
    xml = domain.xml_desc
    file.write(xml)
  end

  log.info("Compress vmhd")
  @vmhd_pathes.each do |vmhd_path|
    File.open("#{vmhd_path}", "rb") do |vmhd|
      name = File.basename(vmhd)
      Zlib::GzipWriter.open("#{tmp_path}/#{name}.gz", Zlib::BEST_COMPRESSION) do |gz|
        offset = 0
        length = 1024
        while offset < vmhd.size
          gz.print(IO.binread(vmhd.path, length, offset))
          offset += length
        end
      end
    end
  end


  if active
    log.info("Start")
    domain.create
    sleep(10) until domain.active?
  end

  log.info("Archive")
  Zlib::GzipWriter.open("#{target_path}/#{@name}.tar.gz") do |archive|
    out = Archive::Tar::Minitar::Output.new(archive)
    Find.find("#{tmp_path}") do |file|
      Archive::Tar::Minitar::pack_file(file, out)
    end
    out.close
  end  
  FileUtils.rm_rf("#{tmp_path}")

  log.info("Complete backup")
end

#isDefined? ⇒ Boolean 



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# File 'lib/vamboo/domainlist.rb', line 100

def isDefined?
  retval = false
  begin
    Libvirt::open("qemu:///system").lookup_domain_by_name(@name)
    retval = true
  rescue  => e
    retval = false
  end
  retval
end

#verify ⇒ Object 



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# File 'lib/vamboo/domainlist.rb', line 117

def verify
  "#{@name}  #{@vmhd_pathes}"
end

#vmhdIsExist? ⇒ Boolean 



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# File 'lib/vamboo/domainlist.rb', line 111

def vmhdIsExist?
  @vmhd_pathes.all? do |vmhd_path|
    File.exist?(vmhd_path)
  end
end