def isattached(ctx, params, nodename):
attached = False
params = json.loads(params)
try:
is_logged_in = Client.login()
if is_logged_in == False:
raise Exception("Could not login to vCloud Director")
vm = VApp.find_vm_in_vapp(Client.ctx, vm_name=nodename)
if len(vm) > 0:
vm = vm[0]['vm']
volume = params['volumeName']
disks = Disk.get_disks(Client.ctx)
for disk in disks:
if disk['name'] == volume \
and disk['attached_vm'] == vm:
attached = True
break
success = {"status": "Success", "attached": attached}
info(success)
else:
raise Exception(("Could not find node '%s'") % (nodename))
except Exception as e:
failure = {
"status":
"Failure",
"message": (("Error on line %d in file %s (%s): %s") %
(sys.exc_info()[-1].tb_lineno,
sys.exc_info()[-1].tb_frame.f_code.co_filename,
type(e).__name__, e))
}
error(failure)
finally:
Client.logout()
def waitforattach(ctx, mountdev, params):
params = json.loads(params)
try:
is_logged_in = Client.login()
if is_logged_in == False:
raise Exception("Could not login to vCloud Director")
volume = params['volumeName']
disk_urn, attached_vm = Disk.find_disk(Disk.get_disks(Client.ctx),
volume)
if disk_urn is None:
raise Exception(("Volume '%s' does not exist") % (mountdev))
volume_symlink = ("/dev/block/%s") % (disk_urn)
partitions = []
if os.path.lexists(volume_symlink):
device_name = "/dev/block/" + os.readlink(volume_symlink)
try:
mode = os.stat(device_name).st_mode
assert stat.S_ISBLK(mode) == True
except OSError:
raise Exception(("Device '%s' does not exist") % (device_name))
except AssertionError:
raise Exception(
("Device '%s' exists but is not a block device") % \
(device_name)
)
partitions = disk_partitions(device_name.split('/')[-1])
attached = False
for part in partitions:
cmd_find_symlink = (
"find -L /dev/disk/by-path -samefile /dev/%s") % (part)
try:
ret = subprocess.check_output(cmd_find_symlink, shell=True)
if ret.decode().strip() == mountdev:
attached = True
break
except subprocess.CalledProcessError:
continue
if attached:
success = {"status": "Success", "device": "%s" % mountdev}
info(success)
else:
raise Exception(
("Mount device '%s' is not attached on the remote node") % \
(mountdev)
)
except Exception as e:
failure = {
"status":
"Failure",
"message": (("Error on line %d in file %s (%s): %s") %
(sys.exc_info()[-1].tb_lineno,
sys.exc_info()[-1].tb_frame.f_code.co_filename,
type(e).__name__, e))
}
error(failure)
finally:
Client.logout()
def attach(ctx, params, nodename):
params = json.loads(params)
config = Client.ctx.config
try:
is_logged_in = Client.login()
if is_logged_in == False:
raise Exception("Could not login to vCloud Director")
volume = params['volumeName']
disk_storage = params['storage'] if 'storage' in params else config[
'default_storage']
disk_bus_type = params['busType'] if 'busType' in params else None
disk_bus_sub_type = params[
'busSubType'] if 'busSubType' in params else None
disk_urn, attached_vm = Disk.find_disk(Disk.get_disks(Client.ctx),
volume)
if disk_urn is None:
disk_urn = Disk.create_disk(Client.ctx,
volume,
params['size'],
disk_storage,
bus_type=disk_bus_type,
bus_sub_type=disk_bus_sub_type)
if disk_urn == "":
raise Exception(("Could not create volume '%s'") % (volume))
volume_symlink = ("block/%s") % (disk_urn)
volume_symlink_full = ("/dev/%s") % (volume_symlink)
if attached_vm:
# Disk is in attached state
vm = VApp.find_vm_in_vapp(Client.ctx, vm_id=attached_vm)
# Check if attached to current node
if len(vm) > 0:
vm_name = vm[0]['vm_name']
if vm_name != nodename:
# When node is marked unschedulable 'attach' command on a new node is called before 'detach' on the old one.
# We poll volume for change attached_vm to None for total time 60s before we try to detach it.
n = 0
while n < 6:
timeout = round(Decimal(4 * 1.29**n))
n += 1
sleep(timeout)
disk_urn, attached_vm = Disk.find_disk(
Disk.get_disks(Client.ctx), volume)
if attached_vm is None:
break
if attached_vm:
is_disk_detached = Disk.detach_disk(Client.ctx,
vm_name,
volume,
block=True)
if is_disk_detached == False:
raise Exception(
("Could not detach volume '%s' from '%s'") %
(volume, vm_name))
attached_vm = None
else:
raise Exception(
("Could not find attached VM '%s'. Does the VM exist?") %
(attached_vm))
if attached_vm is None:
etcd = Etcd3Autodiscover(host=config['etcd']['host'],
port=config['etcd']['port'],
ca_cert=config['etcd']['ca_cert'],
cert_key=config['etcd']['key'],
cert_cert=config['etcd']['cert'],
timeout=config['etcd']['timeout'])
client = etcd.connect()
if client is None:
raise Exception(("Could not connect to etcd server '%s'") %
(etcd.errstr()))
lock_name = ("vcloud/%s/disk/attach") % (nodename)
lock_ttl = 120
with client.lock(lock_name, ttl=lock_ttl) as lock:
n = 0
absolute = 10
while lock.is_acquired() == False and n < 6:
timeout = round(Decimal(4 * 1.29**n))
absolute += timeout
n += 1
lock.acquire(timeout=timeout)
if lock.is_acquired() == False:
raise Exception(
("Could not acquire lock after %0.fs. Giving up") %
(absolute))
lock.refresh()
is_disk_attached = Disk.attach_disk(Client.ctx, nodename,
volume)
if is_disk_attached == False:
raise Exception(
("Could not attach volume '%s' to node '%s'") %
(volume, nodename))
is_disk_connected = wait_for_connected_disk(60)
if len(is_disk_connected) == 0:
raise DiskTimeoutException(
("Timed out while waiting for volume '%s' to attach to node '%s'") % \
(volume, nodename)
)
# Make sure task is completed
task = Client.ctx.client.get_task_monitor().wait_for_status(
task=is_disk_attached,
timeout=60,
poll_frequency=2,
fail_on_statuses=None,
expected_target_statuses=[
TaskStatus.SUCCESS, TaskStatus.ABORTED,
TaskStatus.ERROR, TaskStatus.CANCELED
],
callback=None)
assert task.get('status') == TaskStatus.SUCCESS.value
device_name, device_status = is_disk_connected
device_name_short = device_name.split('/')[-1]
disk_path = get_disk_path(device_name)
disk_path_short = disk_path.split('/')[-1]
if os.path.lexists(volume_symlink_full) == False:
os.symlink("../" + device_name_short, volume_symlink_full)
# Create udev rule to fix: https://github.com/sysoperator/kube-vcloud-flexvolume/issues/7
# Use more stable device names:
# SUBSYSTEM=="block", ENV{ID_TYPE}=="disk", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="pci-0000:03:00.0-scsi-0:0:1:0", SYMLINK+="block/7e9554ee-0bca-43b8-80a0-c50498ba45b1"
udev_rule_path = (
"/etc/udev/rules.d/90-vcloud-idisk-%s.rules") % (
disk_urn)
with open(udev_rule_path, "w") as udev_rule:
udev_rule.write(
('SUBSYSTEM=="block", ENV{ID_TYPE}=="disk", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="%s", SYMLINK+="%s"\n') % \
(disk_path_short, volume_symlink)
)
udev_rule.close()
lock.release()
else:
if os.path.lexists(volume_symlink_full):
device_name = "/dev/block/" + os.readlink(volume_symlink_full)
device_name_short = device_name.split('/')[-1]
try:
mode = os.stat(device_name).st_mode
assert stat.S_ISBLK(mode) == True
except OSError:
raise Exception(
("Device '%s' does not exist on node '%s'") %
(device_name, nodename))
except AssertionError:
raise Exception(
("Device '%s' exists on node '%s' but is not a block device") % \
(device_name, nodename)
)
else:
import inspect
raise Exception(
("Fatal error on line %d. This should never happen") %
(inspect.currentframe().f_lineno))
partitions = disk_partitions(device_name_short)
if len(partitions) == 0:
try:
# See: http://man7.org/linux/man-pages/man8/sfdisk.8.html
cmd_create_partition = ("echo -n ',,83;' | sfdisk %s") % (
device_name)
subprocess.check_call(cmd_create_partition,
shell=True,
stdout=DEVNULL,
stderr=DEVNULL)
partition = ("%s%d") % (device_name, 1)
except subprocess.CalledProcesError:
raise Exception(("Could not create partition on device '%s'") %
(device_name))
else:
partitions.sort()
partition = ("/%s/%s") % (device_name.split('/')[1], partitions[0])
cmd_find_symlink = ("find -L /dev/disk/by-path -samefile %s") % (
partition)
found = False
try:
# with timeout
_timeout = 5
_start = time()
while time() < _start + _timeout:
sleep(1)
ret = subprocess.check_output(cmd_find_symlink, shell=True)
partition = ret.decode().strip()
if partition.startswith("/dev/disk/by-path"):
found = True
break
except subprocess.CalledProcessError:
pass
if found == False:
raise Exception((
"Could not find symlink for partition '%s' in /dev/disk/by-path dir"
) % (partition))
success = {"status": "Success", "device": "%s" % partition}
info(success)
except Exception as e:
failure = {
"status":
"Failure",
"message": (("Error on line %d in file %s (%s): %s") %
(sys.exc_info()[-1].tb_lineno,
sys.exc_info()[-1].tb_frame.f_code.co_filename,
type(e).__name__, e))
}
error(failure)
finally:
Client.logout()
def detach(ctx, volume, nodename):
config = Client.ctx.config
try:
is_disk_disconnected = []
is_logged_in = Client.login()
if is_logged_in == False:
raise Exception("Could not login to vCloud Director")
disk_urn, attached_vm = Disk.find_disk(Disk.get_disks(Client.ctx),
volume)
if disk_urn is None:
raise Exception(("Volume '%s' does not exist") % (volume))
volume_symlink = ("block/%s") % (disk_urn)
volume_symlink_full = ("/dev/%s") % (volume_symlink)
if os.path.lexists(volume_symlink_full):
device_name = os.readlink(volume_symlink_full)
device_name_short = device_name.split('/')[-1]
if attached_vm is None:
info(GENERIC_SUCCESS)
else:
vm = VApp.find_vm_in_vapp(Client.ctx, vm_id=attached_vm)
# Check if attached to any node but not to current one
vm_name = vm[0]['vm_name']
# If not return GENERIC_SUCCESS
if vm_name != nodename:
info(GENERIC_SUCCESS)
# Process normal detach
etcd = Etcd3Autodiscover(host=config['etcd']['host'],
port=config['etcd']['port'],
ca_cert=config['etcd']['ca_cert'],
cert_key=config['etcd']['key'],
cert_cert=config['etcd']['cert'],
timeout=config['etcd']['timeout'])
client = etcd.connect()
if client is None:
raise Exception(
("Could not connect to etcd server '%s'") % (etcd.errstr()))
lock_name = ("vcloud/%s/disk/detach") % (nodename)
lock_ttl = 120
with client.lock(lock_name, ttl=lock_ttl) as lock:
n = 0
absolute = 10
while lock.is_acquired() == False and n < 6:
timeout = round(Decimal(4 * 1.29**n))
absolute += timeout
n += 1
lock.acquire(timeout=timeout)
if lock.is_acquired() == False:
raise Exception(
("Could not acquire lock after %0.fs. Giving up") %
(absolute))
lock.refresh()
is_disk_detached = Disk.detach_disk(Client.ctx, nodename, volume)
if is_disk_detached == False:
raise Exception(
("Could not detach volume '%s' from node '%s'") % \
(volume, nodename)
)
else:
is_disk_disconnected = wait_for_connected_disk(60)
if len(is_disk_disconnected) == 0:
raise DiskTimeoutException(
("Timed out while waiting for volume '%s' to detach from node '%s'") % \
(volume, nodename)
)
# Make sure task is completed
task = Client.ctx.client.get_task_monitor().wait_for_status(
task=is_disk_detached,
timeout=60,
poll_frequency=2,
fail_on_statuses=None,
expected_target_statuses=[
TaskStatus.SUCCESS, TaskStatus.ABORTED,
TaskStatus.ERROR, TaskStatus.CANCELED
],
callback=None)
assert task.get('status') == TaskStatus.SUCCESS.value
lock.release()
info(GENERIC_SUCCESS)
except Exception as e:
failure = {
"status":
"Failure",
"message": (("Error on line %d in file %s (%s): %s") %
(sys.exc_info()[-1].tb_lineno,
sys.exc_info()[-1].tb_frame.f_code.co_filename,
type(e).__name__, e))
}
error(failure)
finally:
if len(is_disk_disconnected) == 2:
device_status = is_disk_disconnected[1]
if device_status == 'disconnected':
if os.path.lexists(volume_symlink_full):
os.unlink(volume_symlink_full)
udev_rule_path = (
"/etc/udev/rules.d/90-vcloud-idisk-%s.rules") % (disk_urn)
if os.path.exists(udev_rule_path):
os.unlink(udev_rule_path)
Client.logout()