def _send_state_to_control_service(self, state_changes):
context = LOG_SEND_TO_CONTROL_SERVICE(
self.fsm.logger,
connection=self.client,
local_changes=list(state_changes),
)
with context.context():
d = DeferredContext(
self.client.callRemote(NodeStateCommand,
state_changes=state_changes,
eliot_context=context))
def record_acknowledged_state(ignored):
self._last_acknowledged_state = state_changes
def clear_acknowledged_state(failure):
# We don't know if the control service has processed the update
# or not. So we clear the last acknowledged state so that we
# always send the state on the next iteration.
self._last_acknowledged_state = None
return failure
d.addCallbacks(record_acknowledged_state, clear_acknowledged_state)
d.addErrback(writeFailure, self.fsm.logger,
u"Failed to send local state to control node.")
return d.addActionFinish()
def _send_state_to_control_service(self, state_changes):
context = LOG_SEND_TO_CONTROL_SERVICE(
self.fsm.logger, connection=self.client,
local_changes=list(state_changes),
)
with context.context():
d = DeferredContext(self.client.callRemote(
NodeStateCommand,
state_changes=state_changes,
eliot_context=context)
)
def record_acknowledged_state(ignored):
self._last_acknowledged_state = state_changes
def clear_acknowledged_state(failure):
# We don't know if the control service has processed the update
# or not. So we clear the last acknowledged state so that we
# always send the state on the next iteration.
self._last_acknowledged_state = None
return failure
d.addCallbacks(record_acknowledged_state, clear_acknowledged_state)
d.addErrback(
writeFailure, self.fsm.logger,
u"Failed to send local state to control node.")
return d.addActionFinish()
def proxy(upstream, endpoint, header):
"""
Establish a new connection to ``endpoint`` and begin proxying between that
connection and ``upstream``.
:param IProtocol upstream: A connected protocol. All data received by
this protocol from this point on will be sent along to another newly
established connection.
:param IStreamClientEndpoint endpoint: An endpoint to use to establish a
new connection. All data received over this connection will be sent
along to the upstream connection.
:param bytes header: Some extra data to write to the new downstream
connection before proxying begins.
"""
def failed(reason):
upstream.transport.resumeProducing()
upstream.transport.abortConnection()
return reason
upstream.transport.pauseProducing()
peer = upstream.transport.getPeer()
action = start_action(
action_type=u"grid-router:proxy",
**{u"from": (peer.host, peer.port)}
)
with action.context():
d = DeferredContext(endpoint.connect(Factory.forProtocol(_Proxy)))
d.addCallbacks(
lambda downstream: DeferredContext(downstream.take_over(upstream, header)),
failed,
)
return d.addActionFinish()
def proxy(upstream, endpoint, header):
"""
Establish a new connection to ``endpoint`` and begin proxying between that
connection and ``upstream``.
:param IProtocol upstream: A connected protocol. All data received by
this protocol from this point on will be sent along to another newly
established connection.
:param IStreamClientEndpoint endpoint: An endpoint to use to establish a
new connection. All data received over this connection will be sent
along to the upstream connection.
:param bytes header: Some extra data to write to the new downstream
connection before proxying begins.
"""
def failed(reason):
upstream.transport.resumeProducing()
upstream.transport.abortConnection()
return reason
upstream.transport.pauseProducing()
peer = upstream.transport.getPeer()
action = start_action(action_type=u"grid-router:proxy",
**{u"from": (peer.host, peer.port)})
with action.context():
d = DeferredContext(endpoint.connect(Factory.forProtocol(_Proxy)))
d.addCallbacks(
lambda downstream: DeferredContext(
downstream.take_over(upstream, header)),
failed,
)
return d.addActionFinish()
def create_stateful_container(self, node, count):
"""
Configure a stateful container to mount a new dataset, and wait for
it to be running.
"""
with start_action(
action_type=u'flocker:benchmark:create_stateful_container',
node=unicode(node.uuid),
count=count
):
d = DeferredContext(
self.client.create_dataset(
primary=node.uuid,
maximum_size=self.max_size,
)
)
def start_container(dataset):
volume = MountedDataset(
dataset_id=dataset.dataset_id,
mountpoint=self.mountpoint
)
d = create_container(
self.reactor,
control_service=self.client,
node_uuid=node.uuid,
name=unicode(uuid4()),
image=self.image,
volumes=[volume],
timeout=self.timeout)
# If container creation fails, delete dataset as well
def delete_dataset(failure):
d = self.client.delete_dataset(dataset.dataset_id)
d.addErrback(write_failure)
d.addBoth(lambda _ignore: failure)
return d
d.addErrback(delete_dataset)
return d
d.addCallback(start_container)
def update_container_count(container):
self.container_count += 1
def update_error_count(failure):
self.error_count += 1
failure.printTraceback(sys.stderr)
write_failure(failure)
d.addCallbacks(update_container_count, update_error_count)
return d.addActionFinish()
def create_stateful_container(self, node, count):
"""
Configure a stateful container to mount a new dataset, and wait for
it to be running.
"""
with start_action(
action_type=u'flocker:benchmark:create_stateful_container',
node=unicode(node.uuid),
count=count
):
d = DeferredContext(
self.client.create_dataset(
primary=node.uuid,
maximum_size=self.max_size,
)
)
def start_container(dataset):
volume = MountedDataset(
dataset_id=dataset.dataset_id,
mountpoint=self.mountpoint
)
d = create_container(
self.reactor,
control_service=self.client,
node_uuid=node.uuid,
name=unicode(uuid4()),
image=self.image,
volumes=[volume],
timeout=self.timeout)
# If container creation fails, delete dataset as well
def delete_dataset(failure):
d = self.client.delete_dataset(dataset.dataset_id)
d.addErrback(write_failure)
d.addBoth(lambda _ignore: failure)
return d
d.addErrback(delete_dataset)
return d
d.addCallback(start_container)
def update_container_count(container):
self.container_count += 1
def update_error_count(failure):
self.error_count += 1
failure.printTraceback(sys.stderr)
write_failure(failure)
d.addCallbacks(update_container_count, update_error_count)
return d.addActionFinish()
def output_START(self, context):
"""
Create a node.
"""
action = start_action(
action_type="flocker_bb:ec2:start",
name=self.identifier())
with action.context():
def thread_start(task_id):
# Since loading the image metadata is done separately from
# booting the node, it's possible the metadata here won't
# actually match the metadata of the image the node ends up
# running (someone could replace the image with a different one
# between this call and the node being started). Since
# generating images is currently a manual step, this probably
# won't happen very often and if it does there's a person there
# who can deal with it. Also it will be resolved after the
# next node restart. It would be better to extract the image
# metadata from the booted node, though.
# FLOC-1905
with Action.continue_task(task_id=task_id):
self.image_metadata = self.driver.get_image_metadata()
return self.driver.create()
d = DeferredContext(
deferToThread(thread_start, action.serialize_task_id())
)
def started(node):
self.node = node
instance_metadata = {
'instance_id': node.id,
'instance_name': node.name,
}
self._fsm.receive(InstanceStarted(
instance_id=node.id,
image_metadata=self.image_metadata,
instance_metadata=instance_metadata,
))
self.instance_metadata = instance_metadata
def failed(f):
# We log the exception twice.
# For Zulip
log.err(f, "while starting %s" % (self.identifier(),))
self._fsm.receive(StartFailed())
# For eliot
return f
d.addCallbacks(started, failed)
d.addActionFinish()
def _retry_exception_async(reactor, f, steps=(0.1,) * 10):
"""
Retry a function if it raises an exception.
:return: Deferred that fires with whatever the function returns or the
last raised exception if the function never succeeds.
"""
# Any failure is recorded and converted to False so that loop_until keeps
# trying. Any success is recorded and converted to True so that
# loop_until completes even if the result evaluates to False.
# If loop_until() succeeds then the recorded result is returned, otherwise
# the last recorded failure is returned.
saved_failure = [None]
saved_result = [None]
def handle_success(result):
saved_result[0] = result
return True
def handle_failure(failure):
Message.log(
message_type=(
u"flocker:provision:libcloud:retry_exception:got_exception"
),
)
write_failure(failure)
saved_failure[0] = failure
return False
def make_call():
d = maybeDeferred(f)
d = DeferredContext(d)
d.addCallbacks(handle_success, errback=handle_failure)
return d.result
action = start_action(
action_type=u"flocker:provision:libcloud:retry_exception",
function=function_serializer(f),
)
with action.context():
d = loop_until(reactor, make_call, steps)
d = DeferredContext(d)
d.addCallbacks(
lambda _: saved_result[0],
errback=lambda _: saved_failure[0],
)
return d.addActionFinish()
def _retry_exception_async(reactor, f, steps=(0.1,) * 10):
"""
Retry a function if it raises an exception.
:return: Deferred that fires with whatever the function returns or the
last raised exception if the function never succeeds.
"""
# Any failure is recorded and converted to False so that loop_until keeps
# trying. Any success is recorded and converted to True so that
# loop_until completes even if the result evaluates to False.
# If loop_until() succeeds then the recorded result is returned, otherwise
# the last recorded failure is returned.
saved_failure = [None]
saved_result = [None]
def handle_success(result):
saved_result[0] = result
return True
def handle_failure(failure):
Message.log(
message_type=(
u"flocker:provision:libcloud:retry_exception:got_exception"
),
)
write_failure(failure)
saved_failure[0] = failure
return False
def make_call():
d = maybeDeferred(f)
d = DeferredContext(d)
d.addCallbacks(handle_success, errback=handle_failure)
return d.result
action = start_action(
action_type=u"flocker:provision:libcloud:retry_exception",
function=function_serializer(f),
)
with action.context():
d = loop_until(reactor, make_call, steps)
d = DeferredContext(d)
d.addCallbacks(
lambda _: saved_result[0],
errback=lambda _: saved_failure[0],
)
return d.addActionFinish()
def g(self, name, req):
# Bind the method to the instance so it has a better
# fullyQualifiedName later on. This is not necessary on Python 3.
bound_getChild = getChild.__get__(self, type(self))
action = start_action(
action_type=u"allmydata:web:common-getChild",
uri=req.uri,
method=req.method,
name=name,
handler=fullyQualifiedName(bound_getChild),
)
with action.context():
result = DeferredContext(maybeDeferred(bound_getChild, name, req))
result.addCallbacks(
_getChild_done,
_getChild_failed,
callbackArgs=(self, ),
)
result = result.addActionFinish()
return DeferredResource(result)
def make_call():
d = maybeDeferred(f)
d = DeferredContext(d)
d.addCallbacks(handle_success, errback=handle_failure)
return d.result
def create_nodes(self, reactor, names, distribution, metadata={}):
"""
Create nodes with the given names.
:param reactor: The reactor.
:param name: The names of the nodes.
:type name: list of str
:param str distribution: The name of the distribution to
install on the nodes.
:param dict metadata: Metadata to associate with the nodes.
:return: A list of ``Deferred``s each firing with an INode
when the corresponding node is created. The list has
the same order as :param:`names`.
"""
size = self._default_size
image_name = self._image_names[distribution]
create_node_arguments = self._create_node_arguments()
def handle_create_error(failure, name):
# XXX This could be dangerous... What about a pre-existing
# node with the same name (or even multiple nodes if the name
# does not have to be unique)?
Message.log(
message_type="flocker:provision:libcloud:create_node:failed",
node_name=name,
)
write_failure(failure)
d = self._async_cleanup_node_named(reactor, name)
d.addCallback(lambda _: failure)
return d
def make_node(node):
public_address = _filter_ipv4(node.public_ips)[0]
if isinstance(public_address, unicode):
public_address = public_address.encode("ascii")
if self._use_private_addresses:
private_address = _filter_ipv4(node.private_ips)[0]
else:
private_address = None
if isinstance(private_address, unicode):
private_address = private_address.encode("ascii")
Message.log(
message_type="flocker:provision:libcloud:node_created",
name=node.name,
id=node.id,
public_address=public_address,
private_address=private_address,
)
return LibcloudNode(
provisioner=self,
node=node, address=public_address,
private_address=private_address,
distribution=distribution)
action = start_action(
action_type=u"flocker:provision:libcloud:create_nodes",
instance_count=len(names),
distribution=distribution,
size=size,
metadata=metadata,
)
with action.context():
results = []
for name in names:
Message.log(
message_type=u"flocker:provision:libcloud:creating_node",
node_name=name,
)
d = maybeDeferred(
self._driver.create_node,
name=name,
image=get_image(self._driver, image_name),
size=get_size(self._driver, size),
ex_keyname=self._keyname,
ex_metadata=metadata,
**create_node_arguments
)
d = DeferredContext(d)
d.addCallbacks(
lambda node: self._wait_until_running(reactor, node),
errback=handle_create_error,
errbackArgs=(name,),
)
d.addCallback(make_node)
results.append(d.result)
action_completion = DeferredContext(DeferredList(results))
action_completion.addActionFinish()
# Individual results and errors should be consumed by the caller,
# so we can leave action_completion alone now.
return results
def make_call():
d = maybeDeferred(f)
d = DeferredContext(d)
d.addCallbacks(handle_success, errback=handle_failure)
return d.result
def create_nodes(self, reactor, names, distribution, metadata={}):
"""
Create nodes with the given names.
:param reactor: The reactor.
:param name: The names of the nodes.
:type name: list of str
:param str distribution: The name of the distribution to
install on the nodes.
:param dict metadata: Metadata to associate with the nodes.
:return: A list of ``Deferred``s each firing with an INode
when the corresponding node is created. The list has
the same order as :param:`names`.
"""
size = self._default_size
image_name = self._image_names[distribution]
create_node_arguments = self._create_node_arguments()
def handle_create_error(failure, name):
# XXX This could be dangerous... What about a pre-existing
# node with the same name (or even multiple nodes if the name
# does not have to be unique)?
Message.log(
message_type="flocker:provision:libcloud:create_node:failed",
node_name=name,
)
write_failure(failure)
d = self._async_cleanup_node_named(reactor, name)
d.addCallback(lambda _: failure)
return d
def make_node(node):
public_address = _filter_ipv4(node.public_ips)[0]
if isinstance(public_address, unicode):
public_address = public_address.encode("ascii")
if self._use_private_addresses:
private_address = _filter_ipv4(node.private_ips)[0]
else:
private_address = None
if isinstance(private_address, unicode):
private_address = private_address.encode("ascii")
Message.log(
message_type="flocker:provision:libcloud:node_created",
name=node.name,
id=node.id,
public_address=public_address,
private_address=private_address,
)
return LibcloudNode(provisioner=self,
node=node,
address=public_address,
private_address=private_address,
distribution=distribution)
action = start_action(
action_type=u"flocker:provision:libcloud:create_nodes",
instance_count=len(names),
distribution=distribution,
size=size,
metadata=metadata,
)
with action.context():
results = []
for name in names:
Message.log(
message_type=u"flocker:provision:libcloud:creating_node",
node_name=name,
)
d = maybeDeferred(self._driver.create_node,
name=name,
image=get_image(self._driver, image_name),
size=get_size(self._driver, size),
ex_keyname=self._keyname,
ex_metadata=metadata,
**create_node_arguments)
d = DeferredContext(d)
d.addCallbacks(
lambda node: self._wait_until_running(reactor, node),
errback=handle_create_error,
errbackArgs=(name, ),
)
d.addCallback(make_node)
results.append(d.result)
action_completion = DeferredContext(DeferredList(results))
action_completion.addActionFinish()
# Individual results and errors should be consumed by the caller,
# so we can leave action_completion alone now.
return results
