def get_replication_for_services(synapse_host, synapse_port, synapse_haproxy_url_format, services):
"""Returns the replication level for the provided services
This check is intended to be used with an haproxy load balancer, and
relies on the implementation details of that choice.
:param synapse_host: The hose that this check should contact for replication information.
:param synapse_port: The port number that this check should contact for replication information.
:param synapse_haproxy_url_format: The format of the synapse haproxy URL.
:param services: A list of strings that are the service names
that should be checked for replication.
:returns available_instance_counts: A dictionary mapping the service names
to an integer number of available
replicas
:returns None: If it cannot connect to the specified synapse host and port
"""
backends = get_multiple_backends(
services=services,
synapse_host=synapse_host,
synapse_port=synapse_port,
synapse_haproxy_url_format=synapse_haproxy_url_format,
)
counter = collections.Counter([b['pxname'] for b in backends if backend_is_up(b)])
return dict((sn, counter[sn]) for sn in services)
def get_replication_for_services(synapse_host, synapse_port, synapse_haproxy_url_format, services):
"""Returns the replication level for the provided services
This check is intended to be used with an haproxy load balancer, and
relies on the implementation details of that choice.
:param synapse_host: The hose that this check should contact for replication information.
:param synapse_port: The port number that this check should contact for replication information.
:param synapse_haproxy_url_format: The format of the synapse haproxy URL.
:param services: A list of strings that are the service names
that should be checked for replication.
:returns available_instance_counts: A dictionary mapping the service names
to an integer number of available
replicas
:returns None: If it cannot connect to the specified synapse host and port
"""
backends = get_multiple_backends(
services=services,
synapse_host=synapse_host,
synapse_port=synapse_port,
synapse_haproxy_url_format=synapse_haproxy_url_format,
)
counter = collections.Counter([b['pxname'] for b in backends if backend_is_up(b)])
return dict((sn, counter[sn]) for sn in services)
def get_registered_marathon_tasks(
synapse_host,
synapse_port,
service,
marathon_tasks,
):
"""Returns the marathon tasks that are registered in haproxy under a given service (nerve_ns).
:param synapse_host: The host that this check should contact for replication information.
:param synapse_port: The port that this check should contact for replication information.
:param service: A list of strings that are the service names that should be checked for replication.
:param marathon_tasks: A list of MarathonTask objects, whose tasks we will check for in the HAProxy status.
"""
backends = get_multiple_backends([service], synapse_host=synapse_host, synapse_port=synapse_port)
healthy_tasks = []
for backend, task in match_backends_and_tasks(backends, marathon_tasks):
if backend is not None and task is not None and backend['status'].startswith('UP'):
healthy_tasks.append(task)
return healthy_tasks
