def member_remove(self, lb_id, pool_id, member_id):
"""Delete a member from Neutron lbaas pool.
:param lb_id: The ID of the loadbalancer the operation is targeted at;
:param pool_id: The ID of the pool from which the member is deleted;
:param member_id: The ID of the LB member.
:returns: True if the operation succeeded or False if errors occurred.
"""
try:
# FIXME(Yanyan Hu): Currently, Neutron lbaasv2 service can not
# handle concurrent lb member operations well: new member creation
# deletion request will directly fail rather than being lined up
# when another operation is still in progress. In this workaround,
# loadbalancer status will be checked before deleting lb member
# request is sent out. If loadbalancer keeps unready till waiting
# timeout, exception will be raised to fail member_remove.
res = self._wait_for_lb_ready(lb_id)
if not res:
msg = _LE('Loadbalancer %s is not ready.') % lb_id
raise exception.Error(msg)
self.nc().pool_member_delete(pool_id, member_id)
except (exception.InternalError, exception.Error) as ex:
msg = _LE('Failed in removing member %(m)s from pool %(p)s: '
'%(ex)s') % {'m': member_id, 'p': pool_id,
'ex': six.text_type(ex)}
LOG.exception(msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in deleting pool member (%s).') % member_id)
return None
return True
def pre_op(self, cluster_id, action):
"""Callback function when cluster membership is about to change.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
:returns: ``None``.
"""
if action.action == consts.CLUSTER_SCALE_IN:
expand = False
# use action input directly if available
count = action.inputs.get('count', None)
if not count:
# check if policy decisions available
pd = action.data.get('deletion', None)
count = pd.get('count', 1) if pd else 1
else:
# this is an action that inflates the cluster
expand = True
count = action.inputs.get('count', None)
if not count:
# check if policy decisions available
pd = action.data.get('creation', None)
count = pd.get('count', 1) if pd else 1
cluster = cluster_mod.Cluster.load(action.context, cluster_id)
kc = self._keystone(cluster)
regions_good = kc.validate_regions(self.regions.keys())
if len(regions_good) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No region is found usable.')
LOG.error(_LE('No region is found usable.'))
return
regions = {}
for r in self.regions.items():
if r[0] in regions_good:
regions[r[0]] = r[1]
current_dist = cluster.get_region_distribution(regions_good)
result = self._create_plan(current_dist, regions, count, expand)
if not result:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('There is no feasible plan to '
'handle all nodes.')
LOG.error(_LE('There is no feasible plan to handle all nodes.'))
return
if expand:
if 'creation' not in action.data:
action.data['creation'] = {}
action.data['creation']['count'] = count
action.data['creation']['regions'] = result
else:
if 'deletion' not in action.data:
action.data['deletion'] = {}
action.data['deletion']['count'] = count
action.data['deletion']['regions'] = result
def __call__(self, request):
"""WSGI method that controls (de)serialization and method dispatch."""
action_args = self.get_action_args(request.environ)
action = action_args.pop('action', None)
try:
deserialized_request = self.dispatch(self.deserializer, action,
request)
action_args.update(deserialized_request)
LOG.debug(('Calling %(controller)s : %(action)s'), {
'controller': self.controller,
'action': action
})
action_result = self.dispatch(self.controller, action, request,
**action_args)
except TypeError as err:
LOG.error(_LE('Exception handling resource: %s') % err)
msg = _('The server could not comply with the request since '
'it is either malformed or otherwise incorrect.')
err = webob.exc.HTTPBadRequest(msg)
http_exc = translate_exception(err, request.best_match_language())
# NOTE(luisg): We disguise HTTP exceptions, otherwise they will be
# treated by wsgi as responses ready to be sent back and they
# won't make it into the pipeline app that serializes errors
raise exception.HTTPExceptionDisguise(http_exc)
except webob.exc.HTTPException as err:
if not isinstance(err, webob.exc.HTTPError):
# Some HTTPException are actually not errors, they are
# responses ready to be sent back to the users, so we don't
# create error log, but disguise and translate them to meet
# openstacksdk's need.
http_exc = translate_exception(err,
request.best_match_language())
raise exception.HTTPExceptionDisguise(http_exc)
if isinstance(err, webob.exc.HTTPServerError):
LOG.error(_LE("Returning %(code)s to user: %(explanation)s"), {
'code': err.code,
'explanation': err.explanation
})
http_exc = translate_exception(err, request.best_match_language())
raise exception.HTTPExceptionDisguise(http_exc)
except exception.SenlinException as err:
raise translate_exception(err, request.best_match_language())
except Exception as err:
log_exception(err, sys.exc_info())
raise translate_exception(err, request.best_match_language())
serializer = self.serializer or serializers.JSONResponseSerializer()
try:
response = webob.Response(request=request)
self.dispatch(serializer, action, response, action_result)
return response
# return unserializable result (typically an exception)
except Exception:
return action_result
def member_add(self, node, lb_id, pool_id, port, subnet):
"""Add a member to Neutron lbaas pool.
:param node: A node object to be added to the specified pool.
:param lb_id: The ID of the loadbalancer.
:param pool_id: The ID of the pool for receiving the node.
:param port: The port for the new LB member to be created.
:param subnet: The subnet to be used by the new LB member.
:returns: The ID of the new LB member or None if errors occurred.
"""
try:
subnet_obj = self.nc().subnet_get(subnet)
net_id = subnet_obj.network_id
net = self.nc().network_get(net_id)
except exception.InternalError as ex:
resource = 'subnet' if subnet in ex.message else 'network'
msg = _LE('Failed in getting %(resource)s: %(msg)s.'
) % {'resource': resource, 'msg': six.text_type(ex)}
LOG.exception(msg)
return None
net_name = net.name
node_detail = node.get_details(oslo_context.get_current())
addresses = node_detail.get('addresses')
if net_name not in addresses:
msg = _LE('Node is not in subnet %(subnet)s')
LOG.error(msg, {'subnet': subnet})
return None
# Use the first IP address if more than one are found in target network
address = addresses[net_name][0]['addr']
try:
# FIXME(Yanyan Hu): Currently, Neutron lbaasv2 service can not
# handle concurrent lb member operations well: new member creation
# deletion request will directly fail rather than being lined up
# when another operation is still in progress. In this workaround,
# loadbalancer status will be checked before creating lb member
# request is sent out. If loadbalancer keeps unready till waiting
# timeout, exception will be raised to fail member_add.
res = self._wait_for_lb_ready(lb_id)
if not res:
msg = _LE('Loadbalancer %s is not ready.') % lb_id
raise exception.Error(msg)
member = self.nc().pool_member_create(pool_id, address, port,
subnet_obj.id)
except (exception.InternalError, exception.Error) as ex:
msg = _LE('Failed in creating lb pool member: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in creating pool member (%s).') % member.id)
return None
return member.id
def __call__(self, request):
"""WSGI method that controls (de)serialization and method dispatch."""
action_args = self.get_action_args(request.environ)
action = action_args.pop('action', None)
try:
deserialized_request = self.dispatch(self.deserializer,
action, request)
action_args.update(deserialized_request)
LOG.debug(('Calling %(controller)s : %(action)s'),
{'controller': self.controller, 'action': action})
action_result = self.dispatch(self.controller, action,
request, **action_args)
except TypeError as err:
LOG.error(_LE('Exception handling resource: %s') % err)
msg = _('The server could not comply with the request since '
'it is either malformed or otherwise incorrect.')
err = webob.exc.HTTPBadRequest(msg)
http_exc = translate_exception(err, request.best_match_language())
# NOTE(luisg): We disguise HTTP exceptions, otherwise they will be
# treated by wsgi as responses ready to be sent back and they
# won't make it into the pipeline app that serializes errors
raise exception.HTTPExceptionDisguise(http_exc)
except webob.exc.HTTPException as err:
if not isinstance(err, webob.exc.HTTPError):
# Some HTTPException are actually not errors, they are
# responses ready to be sent back to the users, so we don't
# create error log, but disguise and translate them to meet
# openstacksdk's need.
http_exc = translate_exception(err,
request.best_match_language())
raise exception.HTTPExceptionDisguise(http_exc)
if isinstance(err, webob.exc.HTTPServerError):
LOG.error(
_LE("Returning %(code)s to user: %(explanation)s"),
{'code': err.code, 'explanation': err.explanation})
http_exc = translate_exception(err, request.best_match_language())
raise exception.HTTPExceptionDisguise(http_exc)
except exception.SenlinException as err:
raise translate_exception(err, request.best_match_language())
except Exception as err:
log_exception(err, sys.exc_info())
raise translate_exception(err, request.best_match_language())
serializer = self.serializer or serializers.JSONResponseSerializer()
try:
response = webob.Response(request=request)
self.dispatch(serializer, action, response, action_result)
return response
# return unserializable result (typically an exception)
except Exception:
return action_result
def pre_op(self, cluster_id, action):
"""Callback function when cluster membership is about to change.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
"""
count = action.inputs.get('count', None)
if action.action == consts.CLUSTER_SCALE_IN:
expand = False
if not count:
pd = action.data.get('deletion', None)
count = pd.get('count', 1) if pd else 1
else:
expand = True
if not count:
pd = action.data.get('creation', None)
count = pd.get('count', 1) if pd else 1
cluster = cluster_mod.Cluster.load(action.context, cluster_id)
nc = self._nova(cluster)
zones_good = nc.validate_azs(self.zones.keys())
if len(zones_good) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No availability zone found available.')
LOG.error(_LE('No availability zone found available.'))
return
zones = {}
for z, w in self.zones.items():
if z in zones_good:
zones[z] = w
current = cluster.get_zone_distribution(action.context, zones.keys())
result = self._create_plan(current, zones, count, expand)
if not result:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('There is no feasible plan to '
'handle all nodes.')
LOG.error(_LE('There is no feasible plan to handle all nodes.'))
return
if expand:
if 'creation' not in action.data:
action.data['creation'] = {}
action.data['creation']['count'] = count
action.data['creation']['zones'] = result
else:
if 'deletion' not in action.data:
action.data['deletion'] = {}
action.data['deletion']['count'] = count
action.data['deletion']['zones'] = result
def member_add(self, node, lb_id, pool_id, port, subnet):
"""Add a member to Neutron lbaas pool.
:param node: A node object to be added to the specified pool.
:param lb_id: The ID of the loadbalancer.
:param pool_id: The ID of the pool for receiving the node.
:param port: The port for the new LB member to be created.
:param subnet: The subnet to be used by the new LB member.
:returns: The ID of the new LB member or None if errors occurred.
"""
addresses = self._get_node_address(node, version=4)
if not addresses:
LOG.error(_LE('Node (%(n)s) does not have valid IPv4 address.'),
{'n': node.id})
return None
try:
subnet_obj = self.nc().subnet_get(subnet)
net_id = subnet_obj.network_id
net = self.nc().network_get(net_id)
except exception.InternalError as ex:
resource = 'subnet' if subnet in ex.message else 'network'
msg = _LE('Failed in getting %(resource)s: %(msg)s.'
) % {'resource': resource, 'msg': six.text_type(ex)}
LOG.exception(msg)
event.warning(oslo_context.get_current(), self,
resource.upper()+'_GET', 'ERROR', msg)
return None
net_name = net.name
if net_name not in addresses:
LOG.error(_LE('Node is not in subnet %(subnet)s'),
{'subnet': subnet})
return None
address = addresses[net_name]
try:
member = self.nc().pool_member_create(pool_id, address, port,
subnet_obj.id)
except exception.InternalError as ex:
msg = _LE('Failed in creating lb pool member: %s.'
) % six.text_type(ex)
LOG.exception(msg)
event.warning(oslo_context.get_current(), self,
'POOL_MEMBER_CREATE', 'ERROR', msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in creating pool member (%s).') % member.id)
return None
return member.id
def pre_op(self, cluster_id, action):
"""Callback function when cluster membership is about to change.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
:returns: ``None``.
"""
count = self._get_count(cluster_id, action)
if count == 0:
return
expand = True
if count < 0:
expand = False
count = -count
cluster = cluster_mod.Cluster.load(action.context, cluster_id)
kc = self._keystone(cluster)
regions_good = kc.validate_regions(self.regions.keys())
if len(regions_good) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No region is found usable.')
LOG.error(_LE('No region is found usable.'))
return
regions = {}
for r in self.regions.items():
if r[0] in regions_good:
regions[r[0]] = r[1]
current_dist = cluster.get_region_distribution(regions_good)
result = self._create_plan(current_dist, regions, count, expand)
if not result:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('There is no feasible plan to '
'handle all nodes.')
LOG.error(_LE('There is no feasible plan to handle all nodes.'))
return
if expand:
if 'creation' not in action.data:
action.data['creation'] = {}
action.data['creation']['count'] = count
action.data['creation']['regions'] = result
else:
if 'deletion' not in action.data:
action.data['deletion'] = {}
action.data['deletion']['count'] = count
action.data['deletion']['regions'] = result
def pre_op(self, cluster_id, action):
"""Callback function when cluster membership is about to change.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
:returns: ``None``.
"""
count = self._get_count(cluster_id, action)
if count == 0:
return
expand = True
if count < 0:
expand = False
count = -count
cluster = cm.Cluster.load(action.context, cluster_id)
kc = self._keystone(cluster)
regions_good = kc.validate_regions(self.regions.keys())
if len(regions_good) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No region is found usable.')
LOG.error(_LE('No region is found usable.'))
return
regions = {}
for r in self.regions.items():
if r[0] in regions_good:
regions[r[0]] = r[1]
current_dist = cluster.get_region_distribution(regions_good)
result = self._create_plan(current_dist, regions, count, expand)
if not result:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('There is no feasible plan to '
'handle all nodes.')
LOG.error(_LE('There is no feasible plan to handle all nodes.'))
return
if expand:
if 'creation' not in action.data:
action.data['creation'] = {}
action.data['creation']['count'] = count
action.data['creation']['regions'] = result
else:
if 'deletion' not in action.data:
action.data['deletion'] = {}
action.data['deletion']['count'] = count
action.data['deletion']['regions'] = result
def pre_op(self, cluster_id, action):
"""Callback function when cluster membership is about to change.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
"""
count = self._get_count(cluster_id, action)
if count == 0:
return
expand = True
if count < 0:
expand = False
count = -count
cluster = cluster_mod.Cluster.load(action.context, cluster_id)
nc = self._nova(cluster)
zones_good = nc.validate_azs(self.zones.keys())
if len(zones_good) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No availability zone found available.')
LOG.error(_LE('No availability zone found available.'))
return
zones = {}
for z, w in self.zones.items():
if z in zones_good:
zones[z] = w
current = cluster.get_zone_distribution(action.context, zones.keys())
result = self._create_plan(current, zones, count, expand)
if not result:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('There is no feasible plan to '
'handle all nodes.')
LOG.error(_LE('There is no feasible plan to handle all nodes.'))
return
if expand:
if 'creation' not in action.data:
action.data['creation'] = {}
action.data['creation']['count'] = count
action.data['creation']['zones'] = result
else:
if 'deletion' not in action.data:
action.data['deletion'] = {}
action.data['deletion']['count'] = count
action.data['deletion']['zones'] = result
def attach(self, cluster):
"""Routine to be invoked when policy is to be attached to a cluster.
:para cluster: The Target cluster to be attached to;
:returns: When the operation was successful, returns a tuple (True,
message); otherwise, return a tuple (False, error).
"""
data = {}
nv_client = self.nova(cluster)
placement_group = self.properties.get(self.PLACEMENT_GROUP)
group_name = placement_group.get('group_name', None)
if group_name is None:
profile = profile_base.Profile.load(
oslo_context.get_current(), cluster.profile_id)
if 'scheduler_hints' in profile.spec:
hints = profile.spec['scheduler_hints']
group_name = hints.get('group', None)
if group_name is not None:
# to add into nova driver
try:
server_group = nv_client.get_server_group(group_name)
except exception.InternalError as ex:
msg = 'Failed in searching server_group'
LOG.exception(_LE('%(msg)s: %(ex)s') % {
'msg': msg, 'ex': six.text_type(ex)})
return False, msg
data['group_id'] = server_group.id
data['inherited_group'] = True
if data.get('group_id') is None:
# to add into nova driver
rule = placement_group.get('placement_rule', 'anti-affinity')
try:
server_group = nv_client.create_server_group(rule)
except exception.InternalError as ex:
msg = 'Failed in creating server_group'
LOG.exception(_LE('%(msg)s: %(ex)s') % {
'msg': msg, 'ex': six.text_type(ex)})
return False, msg
data['group_id'] = server_group.id
data['inherited_group'] = False
policy_data = self._build_policy_data(data)
return True, policy_data
def ActionProc(context, action_id):
'''Action process.'''
# Step 1: materialize the action object
action = Action.load(context, action_id=action_id)
if action is None:
LOG.error(_LE('Action "%s" could not be found.'), action_id)
return False
# TODO(Anyone): Remove context usage in event module
EVENT.info(action.context, action, action.action, 'START')
reason = 'Action completed'
success = True
try:
# Step 2: execute the action
result, reason = action.execute()
except Exception as ex:
# We catch exception here to make sure the following logics are
# executed.
result = action.RES_ERROR
reason = six.text_type(ex)
LOG.exception(_('Unexpected exception occurred during action '
'%(action)s (%(id)s) execution: %(reason)s'),
{'action': action.action, 'id': action.id,
'reason': reason})
success = False
finally:
# NOTE: locks on action is eventually released here by status update
action.set_status(result, reason)
return success
def do_recover(self, obj, **options):
"""Default recover operation.
:param obj: The node object to operate on.
:param options: Keyword arguments for the recover operation.
"""
operation = options.pop('operation', None)
# TODO(Qiming): The operation input could be a list of operations.
if operation and not isinstance(operation, six.string_types):
operation = operation[0]
if operation and operation != consts.RECOVER_RECREATE:
LOG.error(_LE("Recover operation not supported: %s"), operation)
return False
try:
self.do_delete(obj, **options)
except exc.EResourceDeletion as ex:
raise exc.EResourceOperation(op='recovering',
type='node',
id=obj.id,
message=six.text_type(ex))
res = None
try:
res = self.do_create(obj)
except exc.EResourceCreation as ex:
raise exc.EResourceOperation(op='recovering',
type='node',
id=obj.id,
message=six.text_type(ex))
return res
def hup(*args):
# Shuts down the server(s), but allows running requests to complete
self.LOG.error(_LE('SIGHUP received'))
signal.signal(signal.SIGHUP, signal.SIG_IGN)
os.killpg(0, signal.SIGHUP)
signal.signal(signal.SIGHUP, hup)
def node_lock_acquire(context, node_id, action_id, engine=None, forced=False):
"""Try to lock the specified node.
:param context: the context used for DB operations;
:param node_id: ID of the node to be locked.
:param action_id: ID of the action that attempts to lock the node.
:param engine: ID of the engine that attempts to lock the node.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the node - if the returned owner_id is the
# action id, it was a success
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
# Step 2: retry using global configuration options
retries = cfg.CONF.lock_retry_times
retry_interval = cfg.CONF.lock_retry_interval
while retries > 0:
scheduler.sleep(retry_interval)
LOG.debug('Acquire lock for node %s again' % node_id)
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
retries = retries - 1
# Step 3: Last resort is 'forced locking', only needed when retry failed
if forced:
owner = db_api.node_lock_steal(node_id, action_id)
return action_id == owner
# if this node lock by dead engine
action = db_api.action_get(context, owner)
if (action and action.owner and action.owner != engine
and is_engine_dead(context, action.owner)):
LOG.info(
_LI('The node %(n)s is locked by dead action %(a)s, '
'try to steal the lock.'), {
'n': node_id,
'a': owner
})
reason = _('Engine died when executing this action.')
db_api.action_mark_failed(context,
action.id,
time.time(),
reason=reason)
db_api.node_lock_steal(node_id, action_id)
return True
LOG.error(
_LE('Node is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'), {
'old': owner,
'new': action_id
})
return False
def detach(self, cluster):
"""Routine to be called when the policy is detached from a cluster.
:param cluster: The cluster from which the policy is to be detached.
:returns: When the operation was successful, returns a tuple of
(True, data) where the data contains references to the
resources created; otherwise returns a tuple of (False,
error) where the err contains a error message.
"""
reason = _('Servergroup resource deletion succeeded.')
ctx = context.get_admin_context()
binding = db_api.cluster_policy_get(ctx, cluster.id, self.id)
if not binding or not binding.data:
return True, reason
policy_data = self._extract_policy_data(binding.data)
if not policy_data:
return True, reason
group_id = policy_data.get('servergroup_id', None)
inherited_group = policy_data.get('inherited_group', False)
if group_id and not inherited_group:
try:
self.nova(cluster).delete_server_group(group_id)
except Exception as ex:
msg = _('Failed in deleting servergroup.')
LOG.exception(_LE('%(msg)s: %(ex)s') % {
'msg': msg, 'ex': six.text_type(ex)})
return False, msg
return True, reason
def execute(self, **kwargs):
'''Wrapper of action execution.
This is mainly a wrapper that executes an action with cluster lock
acquired.
:return: A tuple (res, reason) that indicates whether the execution
was a success and why if it wasn't a success.
'''
try:
cluster = cluster_mod.Cluster.load(self.context, self.target)
except exception.NotFound:
reason = _('Cluster %(id)s not found') % {'id': self.target}
LOG.error(_LE(reason))
return self.RES_ERROR, reason
# Try to lock cluster before do real operation
forced = True if self.action == self.CLUSTER_DELETE else False
res = senlin_lock.cluster_lock_acquire(cluster.id, self.id,
senlin_lock.CLUSTER_SCOPE,
forced)
if not res:
return self.RES_ERROR, _('Failed locking cluster')
try:
res, reason = self._execute(cluster)
finally:
senlin_lock.cluster_lock_release(cluster.id, self.id,
senlin_lock.CLUSTER_SCOPE)
return res, reason
def detach(self, cluster):
"""Routine to be called when the policy is detached from a cluster.
:param cluster: The cluster from which the policy is to be detached.
:returns: When the operation was successful, returns a tuple of
(True, data) where the data contains references to the
resources created; otherwise returns a tuple of (False,
error) where the err contains a error message.
"""
reason = _('Servergroup resource deletion succeeded.')
ctx = context.get_admin_context()
binding = cpo.ClusterPolicy.get(ctx, cluster.id, self.id)
if not binding or not binding.data:
return True, reason
policy_data = self._extract_policy_data(binding.data)
if not policy_data:
return True, reason
group_id = policy_data.get('servergroup_id', None)
inherited_group = policy_data.get('inherited_group', False)
if group_id and not inherited_group:
try:
self.nova(cluster).delete_server_group(group_id)
except Exception as ex:
msg = _('Failed in deleting servergroup.')
LOG.exception(_LE('%(msg)s: %(ex)s') % {
'msg': msg, 'ex': six.text_type(ex)})
return False, msg
return True, reason
def node_lock_acquire(node_id, action_id, forced=False):
'''Try to lock the specified node.
:param forced_locking: set to True to cancel current action that
owns the lock, if any.
'''
# Step 1: try lock the node - if the returned owner_id is the
# action id, it was a success
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
# Step 2: retry using global configuration options
retries = cfg.CONF.lock_retry_times
retry_interval = cfg.CONF.lock_retry_interval
while retries > 0:
scheduler.sleep(retry_interval)
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
retries = retries - 1
# Step 3: Last resort is 'forced locking', only needed when retry failed
if forced:
owner = db_api.node_lock_steal(node_id, action_id)
return action_id == owner
LOG.error(_LE('Node is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock') % {
'old': owner, 'new': action_id})
return False
def detach(self, cluster):
"""Routine to be called when the policy is detached from a cluster.
:param cluster: The cluster from which the policy is to be detached.
:returns: When the operation was successful, returns a tuple of
(True, data) where the data contains references to the
resources created; otherwise returns a tuple of (False,
error) where the err contains a error message.
"""
reason = _('Server group resources deletion succeeded')
cp = cluster_policy.ClusterPolicy.load(oslo_context.get_current(),
cluster.id, self.id)
if cp is None or cp.data is None:
return True, reason
policy_data = self._extract_policy_data(cp.data)
if policy_data is None:
return True, reason
group_id = policy_data.get('group_id', None)
inherited_group = policy_data.get('inherited_group', False)
if group_id and not inherited_group:
try:
# to add into nova driver
self.nova(cluster).delete_server_group(group_id)
except exception.InternalError as ex:
msg = 'Failed in deleting server_group'
LOG.exception(_LE('%(msg)s: %(ex)s') % {
'msg': msg, 'ex': six.text_type(ex)})
return False, msg
return True, reason
def kill_children(self, *args):
"""Kills the entire process group."""
LOG.error(_LE('SIGTERM received'))
signal.signal(signal.SIGTERM, signal.SIG_IGN)
signal.signal(signal.SIGINT, signal.SIG_IGN)
self.running = False
os.killpg(0, signal.SIGTERM)
def kill_children(self, *args):
"""Kills the entire process group."""
LOG.error(_LE('SIGTERM received'))
signal.signal(signal.SIGTERM, signal.SIG_IGN)
signal.signal(signal.SIGINT, signal.SIG_IGN)
self.running = False
os.killpg(0, signal.SIGTERM)
def member_add(self, node, lb_id, pool_id, port, subnet):
"""Add a member to Neutron lbaas pool.
:param node: A node object to be added to the specified pool.
:param lb_id: The ID of the loadbalancer.
:param pool_id: The ID of the pool for receiving the node.
:param port: The port for the new LB member to be created.
:param subnet: The subnet to be used by the new LB member.
:returns: The ID of the new LB member or None if errors occurred.
"""
try:
subnet_obj = self.nc().subnet_get(subnet)
net_id = subnet_obj.network_id
net = self.nc().network_get(net_id)
except exception.InternalError as ex:
resource = 'subnet' if subnet in ex.message else 'network'
msg = _LE('Failed in getting %(resource)s: %(msg)s.'
) % {'resource': resource, 'msg': six.text_type(ex)}
LOG.exception(msg)
return None
net_name = net.name
node_detail = node.get_details(oslo_context.get_current())
addresses = node_detail.get('addresses')
if net_name not in addresses:
LOG.error(_LE('Node is not in subnet %(subnet)s'),
{'subnet': subnet})
return None
# Use the first IP address if more than one are found in target network
address = addresses[net_name][0]
try:
member = self.nc().pool_member_create(pool_id, address, port,
subnet_obj.id)
except exception.InternalError as ex:
msg = _LE('Failed in creating lb pool member: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in creating pool member (%s).') % member.id)
return None
return member.id
def cluster_lock_acquire(context, cluster_id, action_id, engine=None,
scope=CLUSTER_SCOPE, forced=False):
"""Try to lock the specified cluster.
:param cluster_id: ID of the cluster to be locked.
:param action_id: ID of the action which wants to lock the cluster.
:param engine: ID of the engine which wants to lock the cluster.
:param scope: scope of lock, could be cluster wide lock, or node-wide
lock.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the cluster - if the returned owner_id is the
# action id, it was a success
owners = db_api.cluster_lock_acquire(cluster_id, action_id, scope)
if action_id in owners:
return True
# Step 2: retry using global configuration options
retries = cfg.CONF.lock_retry_times
retry_interval = cfg.CONF.lock_retry_interval
while retries > 0:
scheduler.sleep(retry_interval)
LOG.debug('Acquire lock for cluster %s again' % cluster_id)
owners = db_api.cluster_lock_acquire(cluster_id, action_id, scope)
if action_id in owners:
return True
retries = retries - 1
# Step 3: Last resort is 'forced locking', only needed when retry failed
if forced:
owners = db_api.cluster_lock_steal(cluster_id, action_id)
return action_id in owners
# Will reach here only because scope == CLUSTER_SCOPE
action = db_api.action_get(context, owners[0])
if (action and action.owner and action.owner != engine and
is_engine_dead(context, action.owner)):
LOG.info(_LI('The cluster %(c)s is locked by dead action %(a)s, '
'try to steal the lock.'), {
'c': cluster_id,
'a': owners[0]
})
reason = _('Engine died when executing this action.')
db_api.action_mark_failed(context, action.id, time.time(),
reason=reason)
owners = db_api.cluster_lock_steal(cluster_id, action_id)
return action_id in owners
LOG.error(_LE('Cluster is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'),
{'old': str(owners), 'new': action_id})
return False
def lb_delete(self, **kwargs):
"""Delete a Neutron lbaas instance
The following Neutron lbaas resources will be deleted in order:
1)healthmonitor; 2)pool; 3)listener; 4)loadbalancer.
"""
lb_id = kwargs.pop('loadbalancer')
healthmonitor_id = kwargs.pop('healthmonitor', None)
if healthmonitor_id:
try:
self.nc().healthmonitor_delete(healthmonitor_id)
except exception.InternalError as ex:
msg = _LE('Failed in deleting healthmonitor: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
res = self._wait_for_lb_ready(lb_id)
if res is False:
msg = _LE('Failed in deleting healthmonitor '
'(%s).') % healthmonitor_id
return False, msg
pool_id = kwargs.pop('pool', None)
if pool_id:
try:
self.nc().pool_delete(pool_id)
except exception.InternalError as ex:
msg = _LE('Failed in deleting lb pool: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
res = self._wait_for_lb_ready(lb_id)
if res is False:
msg = _LE('Failed in deleting pool (%s).') % pool_id
return False, msg
listener_id = kwargs.pop('listener', None)
if listener_id:
try:
self.nc().listener_delete(listener_id)
except exception.InternalError as ex:
msg = _LE('Failed in deleting listener: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
res = self._wait_for_lb_ready(lb_id)
if res is False:
msg = _LE('Failed in deleting listener (%s).') % listener_id
return False, msg
self.nc().loadbalancer_delete(lb_id)
res = self._wait_for_lb_ready(lb_id, ignore_not_found=True)
if res is False:
msg = _LE('Failed in deleting loadbalancer (%s).') % lb_id
return False, msg
return True, _('LB deletion succeeded')
def node_lock_acquire(context, node_id, action_id, engine=None,
forced=False):
"""Try to lock the specified node.
:param context: the context used for DB operations;
:param node_id: ID of the node to be locked.
:param action_id: ID of the action that attempts to lock the node.
:param engine: ID of the engine that attempts to lock the node.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the node - if the returned owner_id is the
# action id, it was a success
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
# Step 2: retry using global configuration options
retries = cfg.CONF.lock_retry_times
retry_interval = cfg.CONF.lock_retry_interval
while retries > 0:
scheduler.sleep(retry_interval)
LOG.debug('Acquire lock for node %s again' % node_id)
owner = db_api.node_lock_acquire(node_id, action_id)
if action_id == owner:
return True
retries = retries - 1
# Step 3: Last resort is 'forced locking', only needed when retry failed
if forced:
owner = db_api.node_lock_steal(node_id, action_id)
return action_id == owner
# if this node lock by dead engine
action = db_api.action_get(context, owner)
if (action and action.owner and action.owner != engine and
is_engine_dead(context, action.owner)):
LOG.info(_LI('The node %(n)s is locked by dead action %(a)s, '
'try to steal the lock.'), {
'n': node_id,
'a': owner
})
reason = _('Engine died when executing this action.')
db_api.action_mark_failed(context, action.id, time.time(),
reason=reason)
db_api.node_lock_steal(node_id, action_id)
return True
LOG.error(_LE('Node is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'),
{'old': owner, 'new': action_id})
return False
def do_create(self, context, **kwargs):
'''Additional logic at the beginning of cluster creation process.
Set cluster status to CREATING.
'''
if self.status != self.INIT:
LOG.error(_LE('Cluster is in status "%s"'), self.status)
return False
self.set_status(context, self.CREATING, reason='Creation in progress')
return True
def do_create(self, context, **kwargs):
'''Additional logic at the beginning of cluster creation process.
Set cluster status to CREATING.
'''
if self.status != self.INIT:
LOG.error(_LE('Cluster is in status "%s"'), self.status)
return False
self.set_status(context, self.CREATING, reason='Creation in progress')
return True
def cluster_lock_acquire(context,
cluster_id,
action_id,
engine=None,
scope=CLUSTER_SCOPE,
forced=False):
"""Try to lock the specified cluster.
:param cluster_id: ID of the cluster to be locked.
:param action_id: ID of the action which wants to lock the cluster.
:param engine: ID of the engine which wants to lock the cluster.
:param scope: scope of lock, could be cluster wide lock, or node-wide
lock.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the cluster - if the returned owner_id is the
# action id, it was a success
owners = cl_obj.ClusterLock.acquire(cluster_id, action_id, scope)
if action_id in owners:
return True
# Step 2: Last resort is 'forced locking', only needed when retry failed
if forced:
owners = cl_obj.ClusterLock.steal(cluster_id, action_id)
return action_id in owners
# Step 3: check if the owner is a dead engine, if so, steal the lock.
# Will reach here only because scope == CLUSTER_SCOPE
action = ao.Action.get(context, owners[0])
if (action and action.owner and action.owner != engine
and utils.is_engine_dead(context, action.owner)):
LOG.info(
_LI('The cluster %(c)s is locked by dead action %(a)s, '
'try to steal the lock.'), {
'c': cluster_id,
'a': owners[0]
})
reason = _('Engine died when executing this action.')
owners = cl_obj.ClusterLock.steal(cluster_id, action_id)
# Mark the old action to failed.
ao.Action.mark_failed(context, action.id, time.time(), reason)
return action_id in owners
LOG.error(
_LE('Cluster is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'), {
'old': str(owners),
'new': action_id
})
return False
def error(context, entity, action, status=None, status_reason=None,
timestamp=None):
timestamp = timestamp or timeutils.utcnow(True)
event = Event(timestamp, logging.ERROR, entity,
action=action, status=status, status_reason=status_reason,
user=context.user, project=context.project)
event.store(context)
LOG.error(_LE('%(name)s [%(id)s] %(action)s - %(status)s: %(reason)s'),
{'name': event.oname,
'id': event.oid and event.oid[:8],
'action': action,
'status': status,
'reason': status_reason})
def member_remove(self, lb_id, pool_id, member_id):
"""Delete a member from Neutron lbaas pool.
:param lb_id: The ID of the loadbalancer the operation is targeted at;
:param pool_id: The ID of the pool from which the member is deleted;
:param member_id: The ID of the LB member.
:returns: True if the operation succeeded or False if errors occurred.
"""
try:
self.nc().pool_member_delete(pool_id, member_id)
except exception.InternalError as ex:
msg = _LE('Failed in removing member %(m)s from pool %(p)s: '
'%(ex)s') % {'m': member_id, 'p': pool_id,
'ex': six.text_type(ex)}
LOG.exception(msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in deleting pool member (%s).') % member_id)
return None
return True
def _verify_and_respawn_children(self, pid, status):
if len(self.stale_children) == 0:
LOG.debug('No stale children')
if os.WIFEXITED(status) and os.WEXITSTATUS(status) != 0:
LOG.error(_LE('Not respawning child %d, cannot '
'recover from termination'), pid)
if not self.children and not self.stale_children:
LOG.info(_LI('All workers have terminated. Exiting'))
self.running = False
else:
if len(self.children) < self.conf.workers:
self.run_child()
def validate_for_update(self, new_profile):
non_updatables = []
for (k, v) in new_profile.properties.items():
if self.properties.get(k, None) != v:
if not self.properties_schema[k].updatable:
non_updatables.append(k)
if not non_updatables:
return True
msg = ", ".join(non_updatables)
LOG.error(_LE("The following properties are not updatable: %s.") % msg)
return False
def validate_for_update(self, new_profile):
non_updatables = []
for (k, v) in new_profile.properties.items():
if self.properties.get(k, None) != v:
if not self.properties_schema[k].updatable:
non_updatables.append(k)
if not non_updatables:
return True
msg = ", ".join(non_updatables)
LOG.error(_LE("The following properties are not updatable: %s."
) % msg)
return False
def _verify_and_respawn_children(self, pid, status):
if len(self.stale_children) == 0:
LOG.debug('No stale children')
if os.WIFEXITED(status) and os.WEXITSTATUS(status) != 0:
LOG.error(
_LE('Not respawning child %d, cannot '
'recover from termination'), pid)
if not self.children and not self.stale_children:
LOG.info(_LI('All workers have terminated. Exiting'))
self.running = False
else:
if len(self.children) < self.conf.workers:
self.run_child()
def read_global_environment(self):
'''Read and parse global environment files.'''
cfg.CONF.import_opt('environment_dir', 'senlin.common.config')
env_dir = cfg.CONF.environment_dir
try:
files = glob.glob(os.path.join(env_dir, '*'))
except OSError as ex:
LOG.error(_LE('Failed to read %s'), env_dir)
LOG.exception(ex)
return
for fname in files:
try:
with open(fname) as f:
LOG.info(_LI('Loading environment from %s'), fname)
self.load(self.parse(f.read()))
except ValueError as vex:
LOG.error(_LE('Failed to parse %s'), fname)
LOG.exception(six.text_type(vex))
except IOError as ioex:
LOG.error(_LE('Failed to read %s'), fname)
LOG.exception(six.text_type(ioex))
def member_remove(self, lb_id, pool_id, member_id):
"""Delete a member from Neutron lbaas pool.
:param lb_id: The ID of the loadbalancer the operation is targeted at;
:param pool_id: The ID of the pool from which the member is deleted;
:param member_id: The ID of the LB member.
:returns: True if the operation succeeded or False if errors occurred.
"""
try:
self.nc().pool_member_delete(pool_id, member_id)
except exception.InternalError as ex:
msg = _LE('Failed in removing member %(m)s from pool %(p)s: '
'%(ex)s') % {'m': member_id, 'p': pool_id,
'ex': six.text_type(ex)}
LOG.exception(msg)
EVENT.warning(oslo_context.get_current(), self,
'POOL_MEMBER_DELETE', 'ERROR', msg)
return None
res = self._wait_for_lb_ready(lb_id)
if res is False:
LOG.error(_LE('Failed in deleting pool member (%s).') % member_id)
return None
return True
def read_global_environment(self):
'''Read and parse global environment files.'''
cfg.CONF.import_opt('environment_dir', 'senlin.common.config')
env_dir = cfg.CONF.environment_dir
try:
files = glob.glob(os.path.join(env_dir, '*'))
except OSError as ex:
LOG.error(_LE('Failed to read %s'), env_dir)
LOG.exception(ex)
return
for fname in files:
try:
with open(fname) as f:
LOG.info(_LI('Loading environment from %s'), fname)
self.load(self.parse(f.read()))
except ValueError as vex:
LOG.error(_LE('Failed to parse %s'), fname)
LOG.exception(six.text_type(vex))
except IOError as ioex:
LOG.error(_LE('Failed to read %s'), fname)
LOG.exception(six.text_type(ioex))
def __init__(self, **kwargs):
self.kwargs = kwargs
try:
self.message = self.msg_fmt % kwargs
except KeyError:
# exc_info = sys.exc_info()
# if kwargs doesn't match a variable in the message
# log the issue and the kwargs
LOG.exception(_LE('Exception in string format operation'))
for name, value in six.iteritems(kwargs):
LOG.error("%s: %s" % (name, value)) # noqa
if _FATAL_EXCEPTION_FORMAT_ERRORS:
raise
def __init__(self, **kwargs):
self.kwargs = kwargs
try:
self.message = self.msg_fmt % kwargs
except KeyError:
# exc_info = sys.exc_info()
# if kwargs doesn't match a variable in the message
# log the issue and the kwargs
LOG.exception(_LE('Exception in string format operation'))
for name, value in six.iteritems(kwargs):
LOG.error("%s: %s" % (name, value)) # noqa
if _FATAL_EXCEPTION_FORMAT_ERRORS:
raise
def node_lock_acquire(context, node_id, action_id, engine=None, forced=False):
"""Try to lock the specified node.
:param context: the context used for DB operations;
:param node_id: ID of the node to be locked.
:param action_id: ID of the action that attempts to lock the node.
:param engine: ID of the engine that attempts to lock the node.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the node - if the returned owner_id is the
# action id, it was a success
owner = nl_obj.NodeLock.acquire(node_id, action_id)
if action_id == owner:
return True
# Step 2: Last resort is 'forced locking', only needed when retry failed
if forced:
owner = nl_obj.NodeLock.steal(node_id, action_id)
return action_id == owner
# Step 3: Try to steal a lock if it's owner is a dead engine.
# if this node lock by dead engine
action = ao.Action.get(context, owner)
if (action and action.owner and action.owner != engine
and utils.is_engine_dead(context, action.owner)):
LOG.info(
_LI('The node %(n)s is locked by dead action %(a)s, '
'try to steal the lock.'), {
'n': node_id,
'a': owner
})
reason = _('Engine died when executing this action.')
nl_obj.NodeLock.steal(node_id, action_id)
ao.Action.mark_failed(context, action.id, time.time(), reason)
return True
LOG.error(
_LE('Node is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'), {
'old': owner,
'new': action_id
})
return False
def wait_on_children(self):
while self.running:
try:
pid, status = os.wait()
if os.WIFEXITED(status) or os.WIFSIGNALED(status):
self.LOG.error(_LE('Removing dead child %s') % pid)
self.children.remove(pid)
self.run_child()
except OSError as err:
if err.errno not in (errno.EINTR, errno.ECHILD):
raise
except KeyboardInterrupt:
self.LOG.info(_LI('Caught keyboard interrupt. Exiting.'))
os.killpg(0, signal.SIGTERM)
break
eventlet.greenio.shutdown_safe(self.sock)
self.sock.close()
self.LOG.debug('Exited')
def __init__(self, **kwargs):
self.kwargs = kwargs
try:
self.message = self.msg_fmt % kwargs
# if last char is '.', wipe out redundant '.'
if self.message[-1] == '.':
self.message = self.message.rstrip('.') + '.'
except KeyError:
# exc_info = sys.exc_info()
# if kwargs doesn't match a variable in the message
# log the issue and the kwargs
LOG.exception(_LE('Exception in string format operation'))
for name, value in kwargs.items():
LOG.error("%s: %s" % (name, value)) # noqa
if _FATAL_EXCEPTION_FORMAT_ERRORS:
raise
def do_create(self, context):
if self.status != self.INIT:
LOG.error(_LE('Node is in status "%s"'), self.status)
return False
self.set_status(context, self.CREATING, reason='Creation in progress')
event_mod.info(context, self, 'create')
try:
physical_id = profile_base.Profile.create_object(context, self)
except exception.InternalError as ex:
self._handle_exception(context, 'create', self.ERROR, ex)
return False
if not physical_id:
return False
status_reason = 'Creation succeeded'
self.set_status(context, self.ACTIVE, status_reason)
self.physical_id = physical_id
self.store(context)
return True
def _dump(level, action, phase, reason, timestamp):
global dispatchers
if timestamp is None:
timestamp = timeutils.utcnow(True)
# We check the logging level threshold only when debug is False
if cfg.CONF.debug is False:
watermark = cfg.CONF.dispatchers.priority.upper()
bound = consts.EVENT_LEVELS.get(watermark, logging.INFO)
if level < bound:
return
try:
dispatchers.map_method("dump", level, action,
phase=phase, reason=reason, timestamp=timestamp)
except Exception as ex:
LOG.exception(_LE("Dispatcher failed to handle the event: %s"),
six.text_type(ex))
def do_create(self, context):
if self.status != self.INIT:
LOG.error(_LE('Node is in status "%s"'), self.status)
return False
self.set_status(context, self.CREATING, reason='Creation in progress')
event_mod.info(context, self, 'create')
try:
physical_id = profile_base.Profile.create_object(context, self)
except exception.InternalError as ex:
self._handle_exception(context, 'create', self.ERROR, ex)
return False
if not physical_id:
return False
status_reason = 'Creation succeeded'
self.set_status(context, self.ACTIVE, status_reason)
self.physical_id = physical_id
self.store(context)
return True
def do_create(self, context):
if self.status != self.INIT:
LOG.error(_LE('Node is in status "%s"'), self.status)
return False
self.set_status(context, self.CREATING, reason='Creation in progress')
event_mod.info(context, self, 'create')
physical_id = profile_base.Profile.create_object(context, self)
if not physical_id:
return False
if self.cluster_id is not None:
self.index = db_api.cluster_get_next_index(context,
self.cluster_id)
self.physical_id = physical_id
self.created_time = datetime.datetime.utcnow()
self.status = self.ACTIVE
self.status_reason = 'Creation succeeded'
self.store(context)
return True
def do_create(self, context):
if self.status != consts.NS_INIT:
LOG.error(_LE('Node is in status "%s"'), self.status)
return False
self.set_status(context, consts.NS_CREATING, _('Creation in progress'))
try:
physical_id = pb.Profile.create_object(context, self)
except exc.EResourceCreation as ex:
physical_id = ex.resource_id
self.set_status(context,
consts.NS_ERROR,
six.text_type(ex),
physical_id=physical_id)
return False
self.set_status(context,
consts.NS_ACTIVE,
_('Creation succeeded'),
physical_id=physical_id)
return True
def do_recover(self, obj, **options):
"""Default recover operation.
:param obj: The node object to operate on.
:param options: Keyword arguments for the recover operation.
"""
operation = options.get('operation', None)
if operation and operation != consts.RECOVER_RECREATE:
LOG.error(_LE("Recover operation not supported: %s"), operation)
return False
res = self.do_delete(obj)
if res:
try:
res = self.do_create(obj)
except Exception as ex:
LOG.exception(_('Failed at recovering obj: %s '),
six.text_type(ex))
return False
return res
def do_recover(self, obj, **options):
"""Default recover operation.
:param obj: The node object to operate on.
:param options: Keyword arguments for the recover operation.
"""
operation = options.get('operation', None)
if operation and operation != consts.RECOVER_RECREATE:
LOG.error(_LE("Recover operation not supported: %s"), operation)
return False
res = self.do_delete(obj)
if res:
try:
res = self.do_create(obj)
except Exception as ex:
LOG.exception(_('Failed at recovering obj: %s '),
six.text_type(ex))
return False
return res
def cluster_lock_acquire(cluster_id, action_id, scope=CLUSTER_SCOPE,
forced=False):
"""Try to lock the specified cluster.
:param cluster_id: ID of the cluster to be locked.
:param action_id: ID of the action which wants to lock the cluster.
:param scope: scope of lock, could be cluster wide lock, or node-wide
lock.
:param forced: set to True to cancel current action that owns the lock,
if any.
:returns: True if lock is acquired, or False otherwise.
"""
# Step 1: try lock the cluster - if the returned owner_id is the
# action id, it was a success
owners = db_api.cluster_lock_acquire(cluster_id, action_id, scope)
if action_id in owners:
return True
# Step 2: retry using global configuration options
retries = cfg.CONF.lock_retry_times
retry_interval = cfg.CONF.lock_retry_interval
while retries > 0:
scheduler.sleep(retry_interval)
owners = db_api.cluster_lock_acquire(cluster_id, action_id, scope)
if action_id in owners:
return True
retries = retries - 1
# Step 3: Last resort is 'forced locking', only needed when retry failed
if forced:
owners = db_api.cluster_lock_steal(cluster_id, action_id)
return action_id in owners
LOG.error(_LE('Cluster is already locked by action %(old)s, '
'action %(new)s failed grabbing the lock'),
{'old': str(owners), 'new': action_id})
return False
def pre_op(self, cluster_id, action):
"""Callback function when new nodes are to be created for a cluster.
:param cluster_id: ID of the target cluster.
:param action: The action that triggers this policy check.
"""
pd = action.data.get('creation', {})
if pd:
count = pd.get('count', 1)
else:
# If no scaling policy is attached, use the input count directly
count = action.inputs.get('count', 1)
cluster = cluster_mod.Cluster.load(action.context, cluster_id)
zones = self._validate_zones(cluster)
if len(zones) == 0:
action.data['status'] = base.CHECK_ERROR
action.data['reason'] = _('No availability zone found available.')
LOG.error(_LE('No availability zone found available.'))
return
# Calculate AZ distribution for exiting nodes
current_dist = self._get_current_dist(action.context, zones, cluster)
# Calculate placement plan for new nodes
plan = self._create_plan(current_dist, zones, count)
placement = action.data.get('placement', {})
placement['count'] = count
placement['placements'] = []
for az, count in plan.items():
if count > 0:
entry = {'zone': az}
placement['placements'].extend([entry] * count)
action.data.update({'placement': placement})
return
def _wait_for_lb_ready(self, lb_id, timeout=60, ignore_not_found=False):
"""Keep waiting until loadbalancer is ready
This method will keep waiting until loadbalancer resource specified
by lb_id becomes ready, i.e. its provisioning_status is ACTIVE and
its operating_status is ONLINE.
:param lb_id: ID of the load-balancer to check.
:param timeout: timeout in seconds.
:param ignore_not_found: if set to True, nonexistent loadbalancer
resource is also an acceptable result.
"""
waited = 0
while waited < timeout:
try:
lb = self.nc().loadbalancer_get(lb_id)
except exception.InternalError as ex:
msg = _LE('Failed in getting loadbalancer: %s.'
) % six.text_type(ex)
LOG.exception(msg)
EVENT.warning(oslo_context.get_current(), self, 'LB_GET',
'ERROR', msg)
return False
if lb is None:
lb_ready = ignore_not_found
else:
lb_ready = ((lb.provisioning_status == 'ACTIVE') and
(lb.operating_status == 'ONLINE'))
if lb_ready is True:
return True
LOG.debug(_('Waiting for loadbalancer %(lb)s to become ready'),
{'lb': lb_id})
eventlet.sleep(2)
waited += 2
return False
def _wait_for_lb_ready(self, lb_id, timeout=60, ignore_not_found=False):
"""Keep waiting until loadbalancer is ready
This method will keep waiting until loadbalancer resource specified
by lb_id becomes ready, i.e. its provisioning_status is ACTIVE and
its operating_status is ONLINE.
:param lb_id: ID of the load-balancer to check.
:param timeout: timeout in seconds.
:param ignore_not_found: if set to True, nonexistent loadbalancer
resource is also an acceptable result.
"""
waited = 0
while waited < timeout:
try:
lb = self.nc().loadbalancer_get(lb_id)
except exception.InternalError as ex:
msg = _LE('Failed in getting loadbalancer: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False
if lb is None:
lb_ready = ignore_not_found
else:
lb_ready = ((lb.provisioning_status == 'ACTIVE') and
(lb.operating_status == 'ONLINE'))
if lb_ready is True:
return True
LOG.debug(_('Waiting for loadbalancer %(lb)s to become ready'),
{'lb': lb_id})
eventlet.sleep(2)
waited += 2
return False
def do_check(self, obj):
"""Check stack status.
:param obj: Node object to operate.
:returns: True if check succeeded, or False otherwise.
"""
stack_id = obj.physical_id
if stack_id is None:
return False
hc = self.orchestration(obj)
try:
# Timeout = None means we will use the 'default_action_timeout'
# It can be overridden by the TIMEOUT profile propertie
timeout = None
if self.properties[self.TIMEOUT]:
timeout = self.properties[self.TIMEOUT] * 60
hc.stack_check(stack_id)
hc.wait_for_stack(stack_id, 'CHECK_COMPLETE', timeout=timeout)
except exc.InternalError as ex:
LOG.error(_LE('Failed in checking stack: %s.'), ex)
return False
return True
def signal(self, cmd):
"""Send a signal to the action.
:param cmd: One of the command word defined in self.COMMANDS.
:returns: None
"""
if cmd not in self.COMMANDS:
return
if cmd == self.SIG_CANCEL:
expected = (self.INIT, self.WAITING, self.READY, self.RUNNING)
elif cmd == self.SIG_SUSPEND:
expected = (self.RUNNING)
else: # SIG_RESUME
expected = (self.SUSPENDED)
if self.status not in expected:
LOG.error(
_LE("Action (%(id)s) is in status (%(actual)s) while "
"expected status should be one of (%(expected)s)."),
dict(id=self.id[:8], expected=expected, actual=self.status))
return
ao.Action.signal(self.context, self.id, cmd)
def log_exception(err, exc_info):
args = {'exc_info': exc_info} if cfg.CONF.verbose or cfg.CONF.debug else {}
logging.error(_LE("Unexpected error occurred serving API: %s") % err,
**args)
def attach(self, cluster):
"""Routine to be invoked when policy is to be attached to a cluster.
:para cluster: The target cluster to attach to;
:returns: When the operation was successful, returns a tuple (True,
message); otherwise, return a tuple (False, error).
"""
res, data = super(AffinityPolicy, self).attach(cluster)
if res is False:
return False, data
data = {'inherited_group': False}
nc = self.nova(cluster)
group = self.properties.get(self.SERVER_GROUP)
# guess servergroup name
group_name = group.get(self.GROUP_NAME, None)
if group_name is None:
profile = cluster.rt['profile']
if 'scheduler_hints' in profile.spec:
hints = profile.spec['scheduler_hints']
group_name = hints.get('group', None)
if group_name:
try:
server_group = nc.find_server_group(group_name, True)
except exception.InternalError as ex:
msg = _("Failed in retrieving servergroup '%s'.") % group_name
LOG.exception(
_LE('%(msg)s: %(ex)s') % {
'msg': msg,
'ex': six.text_type(ex)
})
return False, msg
if server_group:
# Check if the policies match
policies = group.get(self.GROUP_POLICIES)
if policies and policies != server_group.policies[0]:
msg = _(
"Policies specified (%(specified)s) doesn't match "
"that of the existing servergroup (%(existing)s).") % {
'specified': policies,
'existing': server_group.policies[0]
}
return False, msg
data['servergroup_id'] = server_group.id
data['inherited_group'] = True
if not data['inherited_group']:
# create a random name if necessary
if not group_name:
group_name = 'server_group_%s' % utils.random_name()
try:
server_group = nc.create_server_group(
name=group_name, policies=[group.get(self.GROUP_POLICIES)])
except Exception as ex:
msg = _('Failed in creating servergroup.')
LOG.exception(
_LE('%(msg)s: %(ex)s') % {
'msg': msg,
'ex': six.text_type(ex)
})
return False, msg
data['servergroup_id'] = server_group.id
policy_data = self._build_policy_data(data)
return True, policy_data
def lb_create(self, vip, pool, hm=None):
"""Create a LBaaS instance
:param vip: A dict containing the properties for the VIP;
:param pool: A dict describing the pool of load-balancer members.
:param pool: A dict describing the health monitor.
"""
def _cleanup(msg, **kwargs):
LOG.error(msg)
self.lb_delete(**kwargs)
return
result = {}
# Create loadblancer
try:
subnet = self.nc().subnet_get(vip['subnet'])
except exception.InternalError as ex:
msg = _LE('Failed in getting subnet: %s.') % six.text_type(ex)
LOG.exception(msg)
return False, msg
subnet_id = subnet.id
try:
lb = self.nc().loadbalancer_create(subnet_id,
vip.get('address', None),
vip['admin_state_up'])
except exception.InternalError as ex:
msg = _LE('Failed in creating loadbalancer: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
result['loadbalancer'] = lb.id
result['vip_address'] = lb.vip_address
res = self._wait_for_lb_ready(lb.id)
if res is False:
msg = _LE('Failed in creating load balancer (%s).') % lb.id
del result['vip_address']
_cleanup(msg, **result)
return False, msg
# Create listener
try:
listener = self.nc().listener_create(lb.id, vip['protocol'],
vip['protocol_port'],
vip.get('connection_limit',
None),
vip['admin_state_up'])
except exception.InternalError as ex:
msg = _LE('Failed in creating lb listener: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
result['listener'] = listener.id
res = self._wait_for_lb_ready(lb.id)
if res is False:
msg = _LE('Failed in creating listener (%s).') % listener.id
del result['vip_address']
_cleanup(msg, **result)
return res, msg
# Create pool
try:
pool = self.nc().pool_create(pool['lb_method'], listener.id,
pool['protocol'],
pool['admin_state_up'])
except exception.InternalError as ex:
msg = _LE('Failed in creating lb pool: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
result['pool'] = pool.id
res = self._wait_for_lb_ready(lb.id)
if res is False:
msg = _LE('Failed in creating pool (%s).') % pool.id
del result['vip_address']
_cleanup(msg, **result)
return res, msg
if not hm:
return True, result
if not hm:
return True, result
# Create health monitor
try:
health_monitor = self.nc().healthmonitor_create(
hm['type'], hm['delay'], hm['timeout'], hm['max_retries'],
pool.id, hm['admin_state_up'], hm['http_method'],
hm['url_path'], hm['expected_codes'])
except exception.InternalError as ex:
msg = _LE('Failed in creating lb health monitor: %s.'
) % six.text_type(ex)
LOG.exception(msg)
return False, msg
result['healthmonitor'] = health_monitor.id
res = self._wait_for_lb_ready(lb.id)
if res is False:
msg = _LE('Failed in creating health monitor (%s).'
) % health_monitor.id
del result['vip_address']
_cleanup(msg, **result)
return res, msg
return True, result
