def exportToDB(self, save=False, sync=False):
to_store = {
'id': self.id,
'dbid': self.dbid,
'config': sxp.to_string(self.config)
}
xstransact.Write(self.dbpath, to_store)
def exportToDB(self, save=False, sync=False):
to_store = {
'id' : self.id,
'dbid' : self.dbid,
'config' : sxp.to_string(self.config)
}
xstransact.Write(self.dbpath, to_store)
def getDeviceDetails(self, config):
log.debug('vbfs config=' + sxp.to_string(config))
luns = sxp.child_value(config, 'luns')
if not luns:
log.debug('vbfs: luns param not set')
raise VmError('luns param not set')
back = {'luns': luns}
# devid = self.allocateDeviceID()
devid = 1
front = {'virtual-device': "%i" % devid}
log.info('bfsback :%s', back)
log.info('bfsfront:%s', front)
return (devid, back, front)
def getDeviceDetails(self, config):
log.debug("vbfs config=" + sxp.to_string(config))
luns = sxp.child_value(config, "luns")
if not luns:
log.debug("vbfs: luns param not set")
raise VmError("luns param not set")
back = {"luns": luns}
# devid = self.allocateDeviceID()
devid = 1
front = {"virtual-device": "%i" % devid}
log.info("bfsback :%s", back)
log.info("bfsfront:%s", front)
return (devid, back, front)
if node > -1:
insert_after(sxprep,'vcpus',['node', str(node)])
for device_sxp in sxp.children(sxprep, 'device'):
backend = sxp.child(device_sxp[1], 'backend')
if backend == None:
continue
bkdominfo = XendDomain.instance().domain_lookup_nr(backend[1])
if bkdominfo == None:
raise XendError("Could not find backend: %s" % backend[1])
if bkdominfo.getDomid() == XendDomain.DOM0_ID:
# Skip for compatibility of checkpoint data format
continue
backend[1] = bkdominfo.getName()
config = sxp.to_string(sxprep)
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
def sxp2string(sexp):
return sxp.to_string(sexp)
def save(fd, dominfo, network, live, dst, checkpoint=False):
write_exact(fd, SIGNATURE, "could not write guest state file: signature")
# CoW timing
checkpointtime = []
downtime = []
buf_list = []
# Cow timing
checkpointtime.append(time.time())
config = sxp.to_string(dominfo.sxpr())
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
hvm = dominfo.info.is_hvm()
# xc_save takes three customization parameters: maxit, max_f, and
# flags the last controls whether or not save is 'live', while the
# first two further customize behaviour when 'live' save is
# enabled. Passing "0" simply uses the defaults compiled into
# libxenguest; see the comments and/or code in xc_linux_save() for
# more information.
cmd = [xen.util.auxbin.pathTo(XC_SAVE), str(fd),
str(dominfo.getDomid()), "0", "0",
str(int(live) | (int(hvm) << 2)) ]
def saveInputHandler(line, tochild):
if line == "suspend":
dominfo.shutdown('suspend')
# CoW timing
downtime.append(time.time())
dominfo.waitForShutdown()
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP2,
domain_name)
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP3,
domain_name)
if hvm:
dominfo.image.saveDeviceModel()
# for CoW purposes, get qemu-dm state
qemu_fd = os.open("/var/lib/xen/qemu-save.%d" % dominfo.getDomid(), os.O_RDONLY)
while True:
buf = os.read(qemu_fd, dm_batch)
if len(buf):
buf_list.append(buf)
else:
break
os.close(qemu_fd)
# Cow: snapshot VBD
os.system("/etc/xen/scripts/snapshot-vbd.sh %s" %
os.path.basename(dst))
log.debug('Performed VBD snapshot')
tochild.write("done\n")
tochild.flush()
if line == "restart":
global down_end
log.debug("Restarting %d ...", dominfo.getDomid())
dominfo.resumeDomain(downtime)
# CoW timing
downtime.append(time.time())
tochild.write("done\n")
tochild.flush()
forkHelper(cmd, fd, saveInputHandler, False)
# put qemu device model state
if os.path.exists("/var/lib/xen/qemu-save.%d" % dominfo.getDomid()):
os.remove("/var/lib/xen/qemu-save.%d" % dominfo.getDomid())
write_exact(fd, QEMU_SIGNATURE, "could not write qemu signature")
for buf in buf_list:
if len(buf):
write_exact(fd, buf, "could not write device model state")
else:
break
try:
dominfo.setName(domain_name)
except VmError:
# Ignore this. The name conflict (hopefully) arises because we
# are doing localhost migration; if we are doing a suspend of a
# persistent VM, we need the rename, and don't expect the
# conflict. This needs more thought.
pass
# CoW timing
checkpointtime.append(time.time())
log.debug("[downtime] %s", downtime[2] - downtime[0])
log.debug("[checkpoint_time] %s",
checkpointtime[1] - checkpointtime[0])
except Exception, exn:
log.exception("Save failed on domain %s (%s) - resuming.", domain_name,
dominfo.getDomid())
dominfo.resumeDomain([])
try:
dominfo.setName(domain_name)
except:
log.exception("Failed to reset the migrating domain's name")
raise exn
if node > -1:
insert_after(sxprep, 'vcpus', ['node', str(node)])
for device_sxp in sxp.children(sxprep, 'device'):
backend = sxp.child(device_sxp[1], 'backend')
if backend == None:
continue
bkdominfo = XendDomain.instance().domain_lookup_nr(backend[1])
if bkdominfo == None:
raise XendError("Could not find backend: %s" % backend[1])
if bkdominfo.getDomid() == XendDomain.DOM0_ID:
# Skip for compatibility of checkpoint data format
continue
backend[1] = bkdominfo.getName()
config = sxp.to_string(sxprep)
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
def save(fd, dominfo, network, live, dst, checkpoint=False, node=-1):
write_exact(fd, SIGNATURE, "could not write guest state file: signature")
sxprep = dominfo.sxpr()
if node > -1:
insert_after(sxprep, 'vcpus', ['node', str(node)])
config = sxp.to_string(sxprep)
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
hvm = dominfo.info.is_hvm()
# xc_save takes three customization parameters: maxit, max_f, and
# flags the last controls whether or not save is 'live', while the
# first two further customize behaviour when 'live' save is
# enabled. Passing "0" simply uses the defaults compiled into
# libxenguest; see the comments and/or code in xc_linux_save() for
# more information.
cmd = [
xen.util.auxbin.pathTo(XC_SAVE),
str(fd),
str(dominfo.getDomid()), "0", "0",
str(int(live) | (int(hvm) << 2))
]
log.debug("[xc_save]: %s", string.join(cmd))
def saveInputHandler(line, tochild):
log.debug("In saveInputHandler %s", line)
if line == "suspend":
log.debug("Suspending %d ...", dominfo.getDomid())
dominfo.shutdown('suspend')
dominfo.waitForShutdown()
if line in ('suspend', 'suspended'):
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP2,
domain_name)
log.info("Domain %d suspended.", dominfo.getDomid())
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP3,
domain_name)
if hvm:
dominfo.image.saveDeviceModel()
if line == "suspend":
tochild.write("done\n")
tochild.flush()
log.debug('Written done')
forkHelper(cmd, fd, saveInputHandler, False)
# put qemu device model state
if os.path.exists("/var/lib/xen/qemu-save.%d" % dominfo.getDomid()):
write_exact(fd, QEMU_SIGNATURE, "could not write qemu signature")
qemu_fd = os.open("/var/lib/xen/qemu-save.%d" % dominfo.getDomid(),
os.O_RDONLY)
while True:
buf = os.read(qemu_fd, dm_batch)
if len(buf):
write_exact(fd, buf, "could not write device model state")
else:
break
os.close(qemu_fd)
os.remove("/var/lib/xen/qemu-save.%d" % dominfo.getDomid())
if checkpoint:
dominfo.resumeDomain()
else:
dominfo.destroy()
dominfo.testDeviceComplete()
try:
dominfo.setName(domain_name, False)
except VmError:
# Ignore this. The name conflict (hopefully) arises because we
# are doing localhost migration; if we are doing a suspend of a
# persistent VM, we need the rename, and don't expect the
# conflict. This needs more thought.
pass
except Exception, exn:
log.exception("Save failed on domain %s (%s) - resuming.", domain_name,
dominfo.getDomid())
dominfo.resumeDomain()
try:
dominfo.setName(domain_name)
except:
log.exception("Failed to reset the migrating domain's name")
raise exn
def save(fd, dominfo, network, live, dst, checkpoint=False, node=-1):
write_exact(fd, SIGNATURE, "could not write guest state file: signature")
sxprep = dominfo.sxpr()
if node > -1:
insert_after(sxprep,'vcpus',['node', str(node)])
config = sxp.to_string(sxprep)
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
hvm = dominfo.info.is_hvm()
# xc_save takes three customization parameters: maxit, max_f, and
# flags the last controls whether or not save is 'live', while the
# first two further customize behaviour when 'live' save is
# enabled. Passing "0" simply uses the defaults compiled into
# libxenguest; see the comments and/or code in xc_linux_save() for
# more information.
cmd = [xen.util.auxbin.pathTo(XC_SAVE), str(fd),
str(dominfo.getDomid()), "0", "0",
str(int(live) | (int(hvm) << 2)) ]
log.debug("[xc_save]: %s", string.join(cmd))
def saveInputHandler(line, tochild):
log.debug("In saveInputHandler %s", line)
if line == "suspend":
log.debug("Suspending %d ...", dominfo.getDomid())
dominfo.shutdown('suspend')
dominfo.waitForShutdown()
if line in ('suspend', 'suspended'):
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP2,
domain_name)
log.info("Domain %d suspended.", dominfo.getDomid())
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP3,
domain_name)
if hvm:
dominfo.image.saveDeviceModel()
if line == "suspend":
tochild.write("done\n")
tochild.flush()
log.debug('Written done')
forkHelper(cmd, fd, saveInputHandler, False)
# put qemu device model state
if os.path.exists("/var/lib/xen/qemu-save.%d" % dominfo.getDomid()):
write_exact(fd, QEMU_SIGNATURE, "could not write qemu signature")
qemu_fd = os.open("/var/lib/xen/qemu-save.%d" % dominfo.getDomid(),
os.O_RDONLY)
while True:
buf = os.read(qemu_fd, dm_batch)
if len(buf):
write_exact(fd, buf, "could not write device model state")
else:
break
os.close(qemu_fd)
os.remove("/var/lib/xen/qemu-save.%d" % dominfo.getDomid())
if checkpoint:
dominfo.resumeDomain()
else:
dominfo.destroy()
dominfo.testDeviceComplete()
try:
dominfo.setName(domain_name, False)
except VmError:
# Ignore this. The name conflict (hopefully) arises because we
# are doing localhost migration; if we are doing a suspend of a
# persistent VM, we need the rename, and don't expect the
# conflict. This needs more thought.
pass
except Exception, exn:
log.exception("Save failed on domain %s (%s) - resuming.", domain_name,
dominfo.getDomid())
dominfo.resumeDomain()
try:
dominfo.setName(domain_name)
except:
log.exception("Failed to reset the migrating domain's name")
raise exn
def sxprtostr(sxpr):
"convert an sxpr to string"
return sxp.to_string(sxpr)
def save(fd, dominfo, network, live, dst, checkpoint=False):
write_exact(fd, SIGNATURE, "could not write guest state file: signature")
# CoW timing
checkpointtime = []
downtime = []
buf_list = []
# Cow timing
checkpointtime.append(time.time())
config = sxp.to_string(dominfo.sxpr())
domain_name = dominfo.getName()
# Rename the domain temporarily, so that we don't get a name clash if this
# domain is migrating (live or non-live) to the local host. Doing such a
# thing is useful for debugging.
dominfo.setName('migrating-' + domain_name)
try:
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP1, domain_name)
write_exact(fd, pack("!i", len(config)),
"could not write guest state file: config len")
write_exact(fd, config, "could not write guest state file: config")
image_cfg = dominfo.info.get('image', {})
hvm = dominfo.info.is_hvm()
# xc_save takes three customization parameters: maxit, max_f, and
# flags the last controls whether or not save is 'live', while the
# first two further customize behaviour when 'live' save is
# enabled. Passing "0" simply uses the defaults compiled into
# libxenguest; see the comments and/or code in xc_linux_save() for
# more information.
cmd = [
xen.util.auxbin.pathTo(XC_SAVE),
str(fd),
str(dominfo.getDomid()), "0", "0",
str(int(live) | (int(hvm) << 2))
]
def saveInputHandler(line, tochild):
if line == "suspend":
dominfo.shutdown('suspend')
# CoW timing
downtime.append(time.time())
dominfo.waitForShutdown()
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP2,
domain_name)
dominfo.migrateDevices(network, dst, DEV_MIGRATE_STEP3,
domain_name)
if hvm:
dominfo.image.saveDeviceModel()
# for CoW purposes, get qemu-dm state
qemu_fd = os.open(
"/var/lib/xen/qemu-save.%d" % dominfo.getDomid(),
os.O_RDONLY)
while True:
buf = os.read(qemu_fd, dm_batch)
if len(buf):
buf_list.append(buf)
else:
break
os.close(qemu_fd)
# Cow: snapshot VBD
os.system("/etc/xen/scripts/snapshot-vbd.sh %s" %
os.path.basename(dst))
log.debug('Performed VBD snapshot')
tochild.write("done\n")
tochild.flush()
if line == "restart":
global down_end
log.debug("Restarting %d ...", dominfo.getDomid())
dominfo.resumeDomain(downtime)
# CoW timing
downtime.append(time.time())
tochild.write("done\n")
tochild.flush()
forkHelper(cmd, fd, saveInputHandler, False)
# put qemu device model state
if os.path.exists("/var/lib/xen/qemu-save.%d" % dominfo.getDomid()):
os.remove("/var/lib/xen/qemu-save.%d" % dominfo.getDomid())
write_exact(fd, QEMU_SIGNATURE, "could not write qemu signature")
for buf in buf_list:
if len(buf):
write_exact(fd, buf, "could not write device model state")
else:
break
try:
dominfo.setName(domain_name)
except VmError:
# Ignore this. The name conflict (hopefully) arises because we
# are doing localhost migration; if we are doing a suspend of a
# persistent VM, we need the rename, and don't expect the
# conflict. This needs more thought.
pass
# CoW timing
checkpointtime.append(time.time())
log.debug("[downtime] %s", downtime[2] - downtime[0])
log.debug("[checkpoint_time] %s",
checkpointtime[1] - checkpointtime[0])
except Exception, exn:
log.exception("Save failed on domain %s (%s) - resuming.", domain_name,
dominfo.getDomid())
dominfo.resumeDomain([])
try:
dominfo.setName(domain_name)
except:
log.exception("Failed to reset the migrating domain's name")
raise exn
def sxprtostr(sxpr):
"convert an sxpr to string"
return sxp.to_string(sxpr)
def sxp2string(sexp):
return sxp.to_string(sexp)
