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, rotation) ⇒ Domain

Returns a new instance of Domain.



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# File 'lib/vamboo/domainlist.rb', line 29

def initialize(name, rotation)
	@name = name
	@rotation = rotation
	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 27

def name
  @name
end

#rotation ⇒ Object (readonly)

Returns the value of attribute rotation.



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# File 'lib/vamboo/domainlist.rb', line 27

def rotation
  @rotation
end

#vmhd_pathes ⇒ Object (readonly)

Returns the value of attribute vmhd_pathes.



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# File 'lib/vamboo/domainlist.rb', line 27

def vmhd_pathes
  @vmhd_pathes
end

Instance Method Details

#backup(target_path) ⇒ Object 



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# File 'lib/vamboo/domainlist.rb', line 41

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("Copy vmhd")
	threads = @vmhd_pathes.map do |vmhd_path|
		Thread.new do
			name = File.basename(vmhd_path)
			FileUtils.cp("#{vmhd_path}", "#{tmp_path}/#{name}")
		end
	end

	threads.each do |t|
		t.join
	end

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

	log.info("Compress vmhd")
	@vmhd_pathes.each do |vmhd_path|
		name = File.basename(vmhd_path)
		tmp = "#{tmp_path}/#{name}"
		File.open(tmp, "rb") do |vmhd|
			Zlib::GzipWriter.open("#{tmp}.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
		FileUtils.rm(tmp, {:force => true})
	end

	log.info("Archive")
	file_name = "#{@name}.#{Date.today.strftime("%Y%m%d")}.tar.gz"
	Zlib::GzipWriter.open("#{target_path}/#{file_name}") 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}")
	
	if @rotation > 0 
		old = Date.today - @rotation
		old_file = "#{@name}.#{old}.tar.gz"
		log.info("Remove old file #{target_path}/#{old}")
		FileUtils.rm_rf("#{target_path}/#{old}")
	end
	log.info("Complete backup")
end

#isDefined? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vamboo/domainlist.rb', line 122

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 139

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

#vmhdIsExist? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vamboo/domainlist.rb', line 133

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