def stop(role=None, cli=False, force=False, **kwargs):
try:
if config['BLKTAP_ENABLED'] is False and vlmc_get_mapped():
vlmc_showmapped()
raise Error("Cannot stop archipelago. Mapped volumes exist")
except VlmcTapdiskException:
pass
if role:
try:
p = peers[role]
except KeyError:
raise Error("Invalid peer %s" % role)
return stop_peer(p, cli)
#check devices
if cli:
print "===================="
print "Stoping archipelago"
print "===================="
print ""
if config["BLKTAP_ENABLED"] and loaded_module('blktap'):
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
if not force:
vlmc_showmapped()
raise Error("Cannot stop archipelago. Mapped volumes exist")
for m in mapped:
if not VlmcTapdisk.is_paused(m.device):
VlmcTapdisk.pause(m.device)
stop_peers(peers, cli)
time.sleep(0.5)
get_segment().destroy()
def start(role=None, cli=False, **kwargs):
if role:
try:
p = peers[role]
except KeyError:
raise Error("Invalid peer %s" % role)
return start_peer(p, cli)
if status() > 0:
raise Error("Cannot start. Try stopping first")
if cli:
print "===================="
print "Starting archipelago"
print "===================="
print ""
try:
#get_segment().create()
#time.sleep(0.5)
create_posixfd_dirs()
start_peers(peers, cli)
if config["BLKTAP_ENABLED"]:
load_module("blktap", None)
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
for m in mapped:
if VlmcTapdisk.is_paused(m.device):
VlmcTapdisk.unpause(m.device)
except Exception as e:
if cli:
print red(e)
stop(role, cli, force=True)
def stop(role=None, cli=False, pause=False, unmap=False, **kwargs):
if role:
try:
p = peers[role]
except KeyError:
raise Error("Invalid peer %s" % role)
return stop_peer(p, cli)
# check devices
if cli:
print "===================="
print "Stoping archipelago"
print "===================="
print ""
if config["BLKTAP_ENABLED"] and loaded_module('blktap'):
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
if not pause:
vlmc_showmapped()
print ""
if unmap:
print red("Mapped volumes exist, unmapping...")
try:
for m in mapped:
vlmc_unmap_volume(m.device)
except Error as e:
raise Error("Error while umapping volume, during "
"shutdown: %s" % e)
else:
raise Error("Found mapped volumes, cannot stop "
"Archipelago")
else:
for m in mapped:
if not VlmcTapdisk.is_paused(m.device):
VlmcTapdisk.pause(m.device)
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
vlmc_showmapped()
print ""
if pause:
import operator
if not reduce(
operator.and_,
[VlmcTapdisk.is_paused(m.device) for m in mapped], True):
raise Error("Found unpaused volume, cannot stop "
"Archipelago")
else:
raise Error("Found more mapped volumes, cannot stop "
"Archipelago")
stop_peers(peers, cli)
time.sleep(0.5)
get_segment().destroy()
def stop(role=None, cli=False, pause=False, unmap=False, **kwargs):
if role:
try:
p = peers[role]
except KeyError:
raise Error("Invalid peer %s" % role)
return stop_peer(p, cli)
# check devices
if cli:
print "===================="
print "Stoping archipelago"
print "===================="
print ""
if config["BLKTAP_ENABLED"] and loaded_module('blktap'):
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
if not pause:
vlmc_showmapped()
print ""
if unmap:
print red("Mapped volumes exist, unmapping...")
try:
for m in mapped:
vlmc_unmap_volume(m.device)
except Error as e:
raise Error("Error while umapping volume, during "
"shutdown: %s" % e)
else:
raise Error("Found mapped volumes, cannot stop "
"Archipelago")
else:
for m in mapped:
if not VlmcTapdisk.is_paused(m.device):
VlmcTapdisk.pause(m.device)
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
vlmc_showmapped()
print ""
if pause:
import operator
if not reduce(operator.and_, [VlmcTapdisk.is_paused(m.device)
for m in mapped],
True):
raise Error("Found unpaused volume, cannot stop "
"Archipelago")
else:
raise Error("Found more mapped volumes, cannot stop "
"Archipelago")
stop_peers(peers, cli)
time.sleep(0.5)
get_segment().destroy()
def unmap_volume(name, **kwargs):
if not loaded_module("blktap"):
raise Error("blktap module not loaded")
device = name
try:
if is_device_mapped(device) is not None:
busy = VlmcTapdisk.busy_pid(device)
mounted = VlmcTapdisk.is_mounted(device)
if not busy and not mounted:
VlmcTapdisk.destroy(device)
else:
if busy:
raise Error("Device is busy (PID: %s)." % busy)
elif mounted:
raise Error("Device is mounted. Cannot unmap device.")
return
raise Error("Device doesn't exist")
except Exception, reason:
raise Error(device + ': ' + str(reason))
def get_mapped():
# If tap-ctl exists return mapped volumes even if blktap module is
# disabled. There is always the possibility we are facing a mixed
# situation where the blktap module is disabled but we have remaining
# archipelago volumes.
if find_executable(VlmcTapdisk.TAP_CTL):
return VlmcTapdisk.list()
else:
# If the executable does not exist and the blktap module is disabled
# we can assume that we can safely return an empty list.
if not config['BLKTAP_ENABLED']:
return []
else:
# Assume that blktap-archipelago-utils package is not
# installed and that tap-ctl executable is missing.
# That way we provide a hint where to find tap-ctl file.
raise Error("%s\n%s" % ("Cannot execute tap-ctl command.",
"Maybe blktap-archipelago-utils package "
"is missing or you don't have sufficient "
"privileges"))
def status(cli=False, **kwargs):
r = 0
if config["BLKTAP_ENABLED"]:
if not loaded_module("blktap"):
for role, _ in reversed(config['roles']):
p = peers[role]
if peer_running(p, cli):
r += 1
if cli:
pretty_print("blktap", red('Not loaded'))
return r
if cli:
if vlmc_showmapped() > 0:
r += 1
else:
mapped = vlmc_get_mapped()
if mapped and len(mapped) > 0:
for m in mapped:
if not VlmcTapdisk.is_paused(m.device):
r += 1
if loaded_module("blktap"):
if cli:
pretty_print("blktap", green('Loaded'))
#r += 1
else:
if cli:
pretty_print("blktap", red('Not loaded'))
for role, _ in reversed(config['roles']):
p = peers[role]
if peer_running(p, cli):
r += 1
try:
if config['BLKTAP_ENABLED'] is False and vlmc_get_mapped():
print red("Mapped volumes exist while blktap module is disabled.")
vlmc_showmapped()
r += 1
except VlmcTapdiskException:
pass
return r
def map_volume(name, assume_v0=False, v0_size=-1, readonly=False, **kwargs):
if not loaded_module("blktap"):
raise Error("blktap module not loaded")
if not is_valid_name(name):
raise Error("Invalid volume name")
device = is_mapped(name)
if device is not None:
raise Error("Volume %s already mapped on device %s%s" % (name,
'/dev/xen/blktap-2/tapdev', device))
try:
device = VlmcTapdisk.create(name, vport=peers['vlmcd'].portno_start,
mport=peers['mapperd'].portno_start,
assume_v0=assume_v0, v0_size=v0_size,
readonly=readonly)
if device:
sys.stderr.write(device + '\n')
return device.split(DEVICE_PREFIX)[1]
raise Error("Cannot map volume '%s'.\n" % name)
except Exception, reason:
raise Error(name + ': ' + str(reason))