def _validate_request(self, req):
results = {}
bad_request = False
if not isinstance(req, dict):
_LOGGER.error("Bad request %s. Request is required as json dict "
"format", str(req))
bad_request = True
else:
requires = ("hostname", "ip", "appname", "progname", "timestamp")
for required in requires:
results[required] = req.get(required)
if required not in req:
_LOGGER.error("Bad request. Required field=%s not in "
"request", required)
bad_request = True
else:
if req.get("action") not in self.supported_actions:
_LOGGER.error("Rep server got unexpetected msg: %s", req)
bad_request = True
if bad_request:
utcnow = datetime.utcnow()
results["timestamp"] = utils.datetime_to_seconds(utcnow)
results["returncode"] = -1
return -1, results
return 0, None
def _build_lookup_tables(apps, existing_tasks):
now = utils.datetime_to_seconds(datetime.utcnow())
forwarders_load, forwarders, app_2_forwarders = [], set(), {}
for app in apps:
if now - app["timestamp"] >= TAConfClient._threshhold_time:
_LOGGER.warn("App=%s on forwarder=%s lost heartbeat",
app["appname"], app["ip"])
continue
if app["ip"] not in forwarders:
forwarders.add(app["ip"])
forwarders_load.append({
"ip": app["ip"],
"hostname": app["hostname"],
"cpu_count": int(app["cpu_count"]),
"tasks": [],
})
# FIXME progname
if app["appname"] not in app_2_forwarders:
app_2_forwarders[app["appname"]] = set()
app_2_forwarders[app["appname"]].add(app["ip"])
for task in existing_tasks:
for forwarder in forwarders_load:
if forwarder["ip"] == task["ip"]:
forwarder["tasks"].append(task)
break
return forwarders_load, app_2_forwarders
def handle_state_update(self, data):
"""
@data: {
"action": "APP_STATE_UPDATE",
"host": hostname,
"ip": ip_address,
"appname": appname,
"progname": program_name,
"remote_server": remote_server,
"state": json_states,
"timestamp": utcnow,
}
"""
utcnow = datetime.utcnow()
data["timestamp"] = utils.datetime_to_seconds(utcnow)
collection = self._get_collection_name(data, "state")
_LOGGER.info("Update state for %s", collection)
if collection not in self._app_state_collections:
self._create_collection(collection)
self._app_state_collections.add(collection)
keys = ("appname", "progname", "remote_server")
state_key = self._get_key(data, keys)
if state_key not in self._app_state_keys:
k = self._kv.insert_collection_data(collection, data, self.appname)
self._app_state_keys[state_key] = k["_key"]
else:
k = self._kv.update_collection_data(collection, self._app_state_keys[state_key], data, self.appname)
def handle_task_config_delete(self, data):
"""
@data: {
"action": "APP_TASK_CONFIG_UPDATE",
"hostname": hostname, # forwarder hostname
"ip": ip_address, # forwarder ip
"appname": appname, # TA on the forwarder
"progname": program_name, # program name in the TA
"task_id": task_id,
"task_name": task_name,
"remote_server": remote_server,
"timestamp": utcnow,
}
"""
utcnow = datetime.utcnow()
data["timestamp"] = utils.datetime_to_seconds(utcnow)
_LOGGER.info("Delete task config for %s", self._config_collection)
keys = ("appname", "progname", "task_name", "remote_server")
task_key = self._get_key(data, keys)
if task_key in self._app_task_keys:
_LOGGER.info("Delete task=%s", task_key)
self._kv.delete_collection_data(self._config_collection, self._app_task_keys[task_key], self.appname)
del self._app_task_keys[task_key]
else:
_LOGGER.error("task=%s is not found.", task_key)
def handle_task_config_update(self, data):
"""
@data: {
"action": "APP_TASK_CONFIG_UPDATE",
"hostname": hostname, # forwarder hostname
"ip": ip_address, # forwarder ip
"appname": appname, # TA on the forwarder
"progname": program_name, # program name in the TA
"task_id": task_id,
"task_name": task_name,
"remote_server": remote_server,
"task_config": config_info,
"timestamp": utcnow,
}
"""
utcnow = datetime.utcnow()
data["timestamp"] = utils.datetime_to_seconds(utcnow)
_LOGGER.info("Update task config for %s", self._config_collection)
keys = ("appname", "progname", "task_name", "remote_server")
task_key = self._get_key(data, keys)
if task_key not in self._app_task_keys:
k = self._kv.insert_collection_data(self._config_collection, data, self.appname)
self._app_task_keys[task_key] = k["_key"]
else:
k = self._kv.update_collection_data(
self._config_collection, self._app_task_keys[task_key], data, self.appname
)
def delete_task_config(self, configs):
"""
Post task configuration to REP server
@configs: A dict which shall contain at least the following fields
{
"hostname": hostname, # forwarder hostname
"ip": ip_address, # forwarder ip adde
"appname": appname, # TA on forwarder
"progname": program_name, # program name in the TA
"task_name": task_name, # Task name
"task_id": task_name, # Task
"remote_server": remote_server,
}
The configs will be dispatched to this "appname" on the forwarder
@return: 0 if it is sucessful otherwise -1
"""
assert configs.get("hostname")
assert configs.get("ip")
assert configs.get("appname")
assert "progname" in configs
assert configs.get("task_name")
assert configs.get("remote_server")
configs["action"] = at.APP_TASK_CONFIG_DELETE
configs["timestamp"] = utils.datetime_to_seconds(datetime.utcnow())
resp = self._req_and_rep(configs)
return self._log_response_status(resp, configs)
def _get_common_req(self, action, appname, progname):
return {
"action": action,
"hostname": _HostnameIp.hostname,
"ip": _HostnameIp.ips[0],
"appname": appname,
"progname": progname if progname else None,
"timestamp": utils.datetime_to_seconds(datetime.utcnow()),
}
def add_event(short_name='', name='', secret_key='', url='', start_time=None, end_time=None):
"""
Get event information and add it to Redis
:param short_name: Id/short name
:param name: Display name
:param secret_key: Secret key for removing
:param url: URL for redirection
:param start_time: Python datetime object of event start time
:param end_time: Python datetime object of event end time
"""
# Generate new secret key if it's not provided
if not secret_key:
secret_key = generate_secret_key(allowed_characters=app.config['SECRET_KEY_CHARACTERS'])
# Convert datetime objects to timestamp seconds
start_seconds = datetime_to_seconds(start_time)
end_seconds = datetime_to_seconds(end_time)
# Setup dictionary of event information to save
event_info = {
'short_name': short_name,
'name': name,
'url': url,
'secret_key': secret_key,
'start_time': start_seconds,
'end_time': end_seconds
}
redis_instance = app.extensions['redis']['REDIS']
# Setup Redis transaction
pipe = redis_instance.pipeline()
# Add commands to transaction
pipe.hmset(app.config['REDIS_KEY_EVENT_INFO'] % short_name, event_info)
pipe.expireat(app.config['REDIS_KEY_EVENT_INFO'] % short_name, end_time)
pipe.zadd(app.config['REDIS_KEY_EVENT_START'], short_name, start_seconds)
pipe.zadd(app.config['REDIS_KEY_EVENT_END'], short_name, end_seconds)
# Execute and return True if no Falses in Redis multi bulk reply
return False not in pipe.execute()
def _log_heartbeat_loss(self):
now = utils.datetime_to_seconds(datetime.utcnow())
apps = self._req_client.get_app_register_info()
for app in apps:
msg = "appname={},ip={},host={},timestamp={}".format(
app["appname"], app["ip"], app["hostname"], app["timestamp"])
if now - app["timestamp"] >= TAConfClient._threshhold_time:
self._heartbeat_logger.warn("%s,heartbeat=lost", msg)
else:
self._heartbeat_logger.warn("%s,heartbeat=live", msg)
def _check_forwarder_availabilities(self):
now = utils.datetime_to_seconds(datetime.utcnow())
tasks_lookup = self._build_tasks_lookup()
if not tasks_lookup:
return
apps = self._req_client.get_app_register_info()
if not apps:
return
bad_tasks, good_tasks = self._separate_tasks(apps, tasks_lookup, now)
bad_tasks = self._merge_bad_tasks(bad_tasks)
if not bad_tasks:
return
_LOGGER.info("Found %d tasks which lost heartbeat in %d seconds",
len(bad_tasks), self._threshhold_time)
tasks = self._reassign_tasks_to_forwarders(bad_tasks, good_tasks, apps)
self._do_send_tasks(tasks)
def tear_down(self):
if self._stopped:
return
self._stopped = True
sock = self.context.socket(self.zmq.REQ)
sock.connect(self.ip_port)
msg = {
"action": at.APP_TEAR_DOWN,
"hostname": self.hostname,
"appname": "",
"progname": None,
"ip": self.ips[0],
"timestamp": utils.datetime_to_seconds(datetime.utcnow()),
}
sock.connect(self.ip_port)
sock.send_json(msg)
req = sock.recv_json()
self._thr.join()
_LOGGER.info("RepServer stopped.")
def _handle_request(self, req):
try:
rets = self.callback(req)
except Exception:
_LOGGER.error("Failed to call callback error=%s",
traceback.format_exc())
rets = None
results = {}
requires = ("hostname", "ip", "appname", "progname")
for required in requires:
results[required] = req.get(required)
utcnow = datetime.utcnow()
results["timestamp"] = utils.datetime_to_seconds(utcnow)
if rets is None:
results["returncode"] = -1
else:
results["returncode"] = 0
results.update(rets)
return results
def handle_registration_update(self, data):
"""
@data: {
"action": "APP_REGIST_INFO_UPDATE",
"host": hostname,
"ip": ip_address,
"appname": appname,
"progname": progname,
"platform": platform_info,
"cpu_count": cpu_count,
"timestamp": utcnow,
}
"""
utcnow = datetime.utcnow()
data["timestamp"] = utils.datetime_to_seconds(utcnow)
app_key = self._get_key(data)
_LOGGER.info("Update registration for %s", self._app_collection)
if app_key not in self._apps:
k = self._kv.insert_collection_data(self._app_collection, data, self.appname)
self._apps[app_key] = self._kv.get_collection_data(self._app_collection, k["_key"], self.appname)
else:
self._kv.update_collection_data(self._app_collection, self._apps[app_key]["_key"], data, self.appname)
self._apps[app_key].update(data)
def test_datetime_to_seconds(self):
seconds = 1535760000
assert seconds == datetime_to_seconds(datetime(2018, 9, 1, tzinfo=UTC))
def datetime_compare_to_secs(value1, value2):
dt1 = utils.datetime_to_seconds(value1)
dt2 = utils.datetime_to_seconds(value2)
return dt1 == dt2
