Add handler for live migration. (84cd62db) · Commits · Mirror / cc-node

ccnode/hypervisor/init.py

+64 −0

Original line number	Diff line number	Diff line
		@@ -106,6 +106,7 @@ class Handler(HostHandler):
		self.main.reset_handler('vm_start', self.vm_start)
		self.main.reset_handler('vm_suspend', self.vm_suspend)
		self.main.reset_handler('vm_resume', self.vm_resume)
		self.main.reset_handler('vm_migrate_tunneled', self.vm_migrate_tunneled)
		self.main.reset_handler('vol_create', self.vol_create)
		self.main.reset_handler('vol_delete', self.vol_delete)
		self.main.reset_handler('vol_import', self.vol_import)
		@@ -156,6 +157,7 @@ class Handler(HostHandler):
		self.main.remove_handler('vm_start')
		self.main.remove_handler('vm_suspend')
		self.main.remove_handler('vm_resume')
		self.main.remove_handler('vm_migrate_tunneled')
		self.main.remove_handler('vol_create')
		self.main.remove_handler('vol_delete')
		self.main.remove_handler('vol_import')
		@@ -267,6 +269,68 @@ class Handler(HostHandler):
		logger.error(msg)
		raise UndefinedDomain(msg)

		def vm_migrate_tunneled(self, name, tun_res, migtun_res, unsafe=False):
		"""Live migrate VM through TCP tunnel.

		:param name: VM name to migrate
		:param tun_res: result of tunnel_setup handler
		:param migtun_res: result of tunnel setup handler
		:param unsafe: for Libvirt >= 0.9.11, see
		http://libvirt.org/html/libvirt-libvirt.html#virDomainMigrateFlags
		"""
		logger.debug('VM live migrate %s', name)

		try:
		remote_virt_port = tun_res['port']
		except KeyError:
		logger.error('Invalid formatted argument tun_res for live'
		' migration')
		raise
		try:
		remote_hv_port = migtun_res['port']
		except KeyError:
		logger.error('Invalid formatted argument migtun_res for live'
		' migration')
		raise
		try:
		vm = self.hypervisor.domains[name]
		except KeyError:
		logger.exception('Cannot find domain %s on hypervisor for live'
		' migration', name)
		raise
		try:
		dest_virt_con = libvirt.open(
		'qemu+tcp://127.0.0.1:%d/system' % remote_virt_port)
		except libvirt.libvirtError:
		logger.exception('Cannot connect to remote libvirt for live'
		' migrating vm %s', name)
		raise
		try:
		if unsafe:
		# VIR_MIGRATE_UNSAFE is not defined for libvirt < 0.9.11
		append_flags = getattr(libvirt, 'VIR_MIGRATE_UNSAFE', 0)
		else:
		append_flags = 0
		vm.lv_dom.migrate(
		dest_virt_con,
		libvirt.VIR_MIGRATE_LIVE \| libvirt.VIR_MIGRATE_PEER2PEER \|
		libvirt.VIR_MIGRATE_TUNNELLED \|
		libvirt.VIR_MIGRATE_PERSIST_DEST \|
		libvirt.VIR_MIGRATE_UNDEFINE_SOURCE \|
		append_flags,
		None,
		'qemu+tcp://127.0.0.1:%d/system' % remote_hv_port,
		0,
		)
		except libvirt.libvirtError:
		# FIXME maybe we should catch some weird crap libvirt bad exception
		logger.exception('Libvirt error while live migrating vm %s', name)
		raise
		finally:
		dest_virt_con.close()

		logger.debug('Sucessfuly live migrated vm %s', name)

		def vol_create(self, pool, name, size):
		logger.debug('Volume create %s, pool %s, size %s', name, pool, size)
		try: