import asyncio
import logging
from juju.controller import Controller
-from juju.client.connector import NoConnectionException
from juju.client import client
import time
JujuControllerFailedConnecting,
JujuApplicationExists,
)
+from n2vc.utils import DB_DATA
+from osm_common.dbbase import DbException
class Libjuju:
:param: enable_os_upgrade: Enable OS Upgrade
"""
- self.endpoints = [endpoint] # TODO: Store and get endpoints from DB
+ self.log = log or logging.getLogger("Libjuju")
+ self.db = db
+ self.endpoints = self._get_api_endpoints_db() or [endpoint]
self.api_proxy = api_proxy
self.username = username
self.password = password
self.cacert = cacert
self.loop = loop or asyncio.get_event_loop()
- self.log = log or logging.getLogger("Libjuju")
- self.db = db
self.n2vc = n2vc
# Generate config for models
self.model_config["enable-os-refresh-update"] = enable_os_upgrade
self.model_config["enable-os-upgrade"] = enable_os_upgrade
- self.reconnecting = asyncio.Lock(loop=self.loop)
+ self.loop.set_exception_handler(self.handle_exception)
self.creating_model = asyncio.Lock(loop=self.loop)
self.models = set()
- self.controller = Controller(loop=self.loop)
-
- self.loop.run_until_complete(self.connect())
-
- async def connect(self):
- """Connect to the controller"""
-
- self.log.debug("Connecting from controller")
- await self.controller.connect(
- endpoint=self.endpoints,
- username=self.username,
- password=self.password,
- cacert=self.cacert,
- )
- e = self.controller.connection().endpoint
- self.log.info("Connected to controller: {}".format(e))
-
- async def disconnect(self):
- """Disconnect from controller"""
-
- self.log.debug("Disconnecting from controller")
- await self.controller.disconnect()
- self.log.info("Disconnected from controller")
+ self.log.debug("Libjuju initialized!")
- def controller_connected(self) -> bool:
- """Check if the controller connection is open
+ self.health_check_task = self.loop.create_task(self.health_check())
- :return: bool: True if connected, False if not connected
+ async def get_controller(self, timeout: float = 5.0) -> Controller:
"""
+ Get controller
- is_connected = False
+ :param: timeout: Time in seconds to wait for controller to connect
+ """
+ controller = None
try:
- is_connected = self.controller.connection().is_open
- except NoConnectionException:
- self.log.warning("VCA not connected")
- return is_connected
+ controller = Controller(loop=self.loop)
+ await asyncio.wait_for(
+ controller.connect(
+ endpoint=self.endpoints,
+ username=self.username,
+ password=self.password,
+ cacert=self.cacert,
+ ),
+ timeout=timeout,
+ )
+ endpoints = await controller.api_endpoints
+ if self.endpoints != endpoints:
+ self.endpoints = endpoints
+ self._update_api_endpoints_db(self.endpoints)
+ return controller
+ except asyncio.CancelledError as e:
+ raise e
+ except Exception as e:
+ self.log.error(
+ "Failed connecting to controller: {}...".format(self.endpoints)
+ )
+ if controller:
+ await self.disconnect_controller(controller)
+ raise JujuControllerFailedConnecting(e)
+
+ async def disconnect(self):
+ """Disconnect"""
+ # Cancel health check task
+ self.health_check_task.cancel()
+ self.log.debug("Libjuju disconnected!")
async def disconnect_model(self, model: Model):
"""
:param: model: Model that will be disconnected
"""
- try:
- await model.disconnect()
- except Exception:
- pass
+ await model.disconnect()
- async def _reconnect(
- self,
- retry: bool = False,
- timeout: int = 5,
- time_between_retries: int = 3,
- maximum_retries: int = 0,
- ):
+ async def disconnect_controller(self, controller: Controller):
"""
- Reconnect to the controller
+ Disconnect controller
- :param: retry: Set it to True to retry if the connection fails
- :param: time_between_retries: Time in seconds between retries
- :param: maximum_retries Maximum retries. If not set, it will retry forever
-
- :raises: Exception if cannot connect to the controller
+ :param: controller: Controller that will be disconnected
"""
-
- if self.reconnecting.locked():
- # Return if another function is trying to reconnect
- return
- async with self.reconnecting:
- attempt = 0
- while True:
- try:
- await asyncio.wait_for(self.connect(), timeout=timeout)
- break
- except asyncio.TimeoutError:
- self.log.error("Error reconnecting to controller: Timeout")
- except Exception as e:
- self.log.error("Error reconnecting to controller: {}".format(e))
-
- attempt += 1
- maximum_retries_reached = attempt == maximum_retries
-
- if not retry or maximum_retries_reached:
- raise JujuControllerFailedConnecting("Controller is not connected")
- else:
- await asyncio.sleep(time_between_retries)
+ await controller.disconnect()
async def add_model(self, model_name: str, cloud_name: str):
"""
:param: cloud_name: Cloud name
"""
- # Reconnect to the controller if not connected
- if not self.controller_connected():
- await self._reconnect()
-
- # Raise exception if model already exists
- if await self.model_exists(model_name):
- raise JujuModelAlreadyExists("Model {} already exists.".format(model_name))
+ # Get controller
+ controller = await self.get_controller()
+ model = None
+ try:
+ # Raise exception if model already exists
+ if await self.model_exists(model_name, controller=controller):
+ raise JujuModelAlreadyExists(
+ "Model {} already exists.".format(model_name)
+ )
- # Block until other workers have finished model creation
- while self.creating_model.locked():
- await asyncio.sleep(0.1)
+ # Block until other workers have finished model creation
+ while self.creating_model.locked():
+ await asyncio.sleep(0.1)
- # If the model exists, return it from the controller
- if model_name in self.models:
- return await self.get_model(model_name)
+ # If the model exists, return it from the controller
+ if model_name in self.models:
+ return
- # Create the model
- self.log.debug("Creating model {}".format(model_name))
- async with self.creating_model:
- model = await self.controller.add_model(
- model_name,
- config=self.model_config,
- cloud_name=cloud_name,
- credential_name=cloud_name,
- )
- await self.disconnect_model(model)
- self.models.add(model_name)
+ # Create the model
+ async with self.creating_model:
+ self.log.debug("Creating model {}".format(model_name))
+ model = await controller.add_model(
+ model_name,
+ config=self.model_config,
+ cloud_name=cloud_name,
+ credential_name=cloud_name,
+ )
+ self.models.add(model_name)
+ finally:
+ if model:
+ await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
- async def get_model(self, model_name: str) -> Model:
+ async def get_model(
+ self, controller: Controller, model_name: str, id=None
+ ) -> Model:
"""
Get model from controller
+ :param: controller: Controller
:param: model_name: Model name
:return: Model: The created Juju model object
"""
+ return await controller.get_model(model_name)
- # Check if controller is connected
- if not self.controller_connected():
- await self._reconnect()
- return await self.controller.get_model(model_name)
-
- async def model_exists(self, model_name: str) -> bool:
+ async def model_exists(
+ self, model_name: str, controller: Controller = None
+ ) -> bool:
"""
Check if model exists
+ :param: controller: Controller
:param: model_name: Model name
:return bool
"""
+ need_to_disconnect = False
- # Check if controller is connected
- if not self.controller_connected():
- await self._reconnect()
+ # Get controller if not passed
+ if not controller:
+ controller = await self.get_controller()
+ need_to_disconnect = True
- return model_name in await self.controller.list_models()
+ # Check if model exists
+ try:
+ return model_name in await controller.list_models()
+ finally:
+ if need_to_disconnect:
+ await self.disconnect_controller(controller)
async def get_model_status(self, model_name: str) -> FullStatus:
"""
:return: Full status object
"""
- model = await self.get_model(model_name)
- status = await model.get_status()
- await self.disconnect_model(model)
- return status
+ controller = await self.get_controller()
+ model = await self.get_model(controller, model_name)
+ try:
+ return await model.get_status()
+ finally:
+ await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
async def create_machine(
self,
"Creating machine (id={}) in model: {}".format(machine_id, model_name)
)
+ # Get controller
+ controller = await self.get_controller()
+
# Get model
- model = await self.get_model(model_name)
+ model = await self.get_model(controller, model_name)
try:
if machine_id is not None:
self.log.debug(
new = True
# Wait until the machine is ready
+ self.log.debug(
+ "Wait until machine {} is ready in model {}".format(
+ machine.entity_id, model_name
+ )
+ )
await JujuModelWatcher.wait_for(
model=model,
entity=machine,
db_dict=db_dict,
n2vc=self.n2vc,
)
- except Exception as e:
- raise e
finally:
await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
- self.log.debug("Machine ready at {}".format(machine.dns_name))
+ self.log.debug(
+ "Machine {} ready at {} in model {}".format(
+ machine.entity_id, machine.dns_name, model_name
+ )
+ )
return machine, new
async def provision_machine(
)
)
+ # Get controller
+ controller = await self.get_controller()
+
# Get model
- model = await self.get_model(model_name)
+ model = await self.get_model(controller, model_name)
try:
# Get provisioner
self.log.error(msg=msg)
raise JujuMachineNotFound(msg)
+ self.log.debug(
+ "Wait until machine {} is ready in model {}".format(
+ machine.entity_id, model_name
+ )
+ )
await JujuModelWatcher.wait_for(
model=model,
entity=machine,
raise e
finally:
await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
- self.log.debug("Machine provisioned {}".format(machine_id))
+ self.log.debug(
+ "Machine provisioned {} in model {}".format(machine_id, model_name)
+ )
return machine_id
:return: (juju.application.Application): Juju application
"""
+ self.log.debug(
+ "Deploying charm {} to machine {} in model ~{}".format(
+ application_name, machine_id, model_name
+ )
+ )
+ self.log.debug("charm: {}".format(path))
+
+ # Get controller
+ controller = await self.get_controller()
# Get model
- model = await self.get_model(model_name)
+ model = await self.get_model(controller, model_name)
try:
application = None
if application_name not in model.applications:
- self.log.debug(
- "Deploying charm {} to machine {} in model ~{}".format(
- application_name, machine_id, model_name
- )
- )
- self.log.debug("charm: {}".format(path))
+
if machine_id is not None:
if machine_id not in model.machines:
msg = "Machine {} not found in model".format(machine_id)
config=config,
)
+ self.log.debug(
+ "Wait until application {} is ready in model {}".format(
+ application_name, model_name
+ )
+ )
await JujuModelWatcher.wait_for(
model=model,
entity=application,
db_dict=db_dict,
n2vc=self.n2vc,
)
+ self.log.debug(
+ "Application {} is ready in model {}".format(
+ application_name, model_name
+ )
+ )
else:
- raise JujuApplicationExists("Application {} exists".format(application_name))
-
- except Exception as e:
- raise e
+ raise JujuApplicationExists(
+ "Application {} exists".format(application_name)
+ )
finally:
await self.disconnect_model(model)
-
- self.log.debug("application deployed")
+ await self.disconnect_controller(controller)
return application
- async def _get_application(
- self, model: Model, application_name: str
- ) -> Application:
+ def _get_application(self, model: Model, application_name: str) -> Application:
"""Get application
:param: model: Model object
:return: (str, str): (output and status)
"""
- # Get model and observer
- model = await self.get_model(model_name)
+ self.log.debug(
+ "Executing action {} using params {}".format(action_name, kwargs)
+ )
+ # Get controller
+ controller = await self.get_controller()
+
+ # Get model
+ model = await self.get_model(controller, model_name)
try:
# Get application
- application = await self._get_application(
+ application = self._get_application(
model, application_name=application_name,
)
if application is None:
"Action {} not in available actions".format(action_name)
)
- self.log.debug(
- "Executing action {} using params {}".format(action_name, kwargs)
- )
action = await unit.run_action(action_name, **kwargs)
- # Register action with observer and wait for it to finish
+ self.log.debug(
+ "Wait until action {} is completed in application {} (model={})".format(
+ action_name, application_name, model_name
+ )
+ )
await JujuModelWatcher.wait_for(
model=model,
entity=action,
db_dict=db_dict,
n2vc=self.n2vc,
)
+
output = await model.get_action_output(action_uuid=action.entity_id)
status = await model.get_action_status(uuid_or_prefix=action.entity_id)
status = (
status[action.entity_id] if action.entity_id in status else "failed"
)
- self.log.debug("action completed with status: {}".format(action.status))
+ self.log.debug(
+ "Action {} completed with status {} in application {} (model={})".format(
+ action_name, action.status, application_name, model_name
+ )
+ )
except Exception as e:
raise e
finally:
await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
return output, status
...
}
"""
+ self.log.debug(
+ "Getting list of actions for application {}".format(application_name)
+ )
- # Get model
- model = await self.get_model(model_name)
+ # Get controller
+ controller = await self.get_controller()
- # Get application
- application = await self._get_application(
- model, application_name=application_name,
- )
+ # Get model
+ model = await self.get_model(controller, model_name)
- # Get list of actions
- actions = await application.get_actions()
+ try:
+ # Get application
+ application = self._get_application(
+ model, application_name=application_name,
+ )
- # Disconnect from model
- await self.disconnect_model(model)
+ # Return list of actions
+ return await application.get_actions()
- return actions
+ finally:
+ # Disconnect from model and controller
+ await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
async def add_relation(
self,
:param: relation_2: Second relation name
"""
+ self.log.debug("Adding relation: {} -> {}".format(relation_1, relation_2))
+
+ # Get controller
+ controller = await self.get_controller()
+
# Get model
- model = await self.get_model(model_name)
+ model = await self.get_model(controller, model_name)
# Build relation strings
r1 = "{}:{}".format(application_name_1, relation_1)
r2 = "{}:{}".format(application_name_2, relation_2)
# Add relation
- self.log.debug("Adding relation: {} -> {}".format(r1, r2))
try:
await model.add_relation(relation1=r1, relation2=r2)
except JujuAPIError as e:
raise e
finally:
await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
async def destroy_model(
self, model_name: str, total_timeout: float,
:param: model_name: Model name
:param: total_timeout: Timeout
"""
- model = await self.get_model(model_name)
- uuid = model.info.uuid
- # Destroy applications
- for application_name in model.applications:
- try:
- await self.destroy_application(
- model, application_name=application_name,
- )
- except Exception as e:
- self.log.error(
- "Error destroying application {} in model {}: {}".format(
- application_name, model_name, e
+ controller = await self.get_controller()
+ model = await self.get_model(controller, model_name)
+ try:
+ self.log.debug("Destroying model {}".format(model_name))
+ uuid = model.info.uuid
+
+ # Destroy applications
+ for application_name in model.applications:
+ try:
+ await self.destroy_application(
+ model, application_name=application_name,
+ )
+ except Exception as e:
+ self.log.error(
+ "Error destroying application {} in model {}: {}".format(
+ application_name, model_name, e
+ )
)
- )
- # Destroy machines
- machines = await model.get_machines()
- for machine_id in machines:
- try:
- await self.destroy_machine(
- model, machine_id=machine_id, total_timeout=total_timeout,
- )
- except asyncio.CancelledError:
- raise
- except Exception:
- pass
-
- # Disconnect model
- await self.disconnect_model(model)
-
- # Destroy model
- self.models.remove(model_name)
- await self.controller.destroy_model(uuid)
-
- # Wait until model is destroyed
- self.log.debug("Waiting for model {} to be destroyed...".format(model_name))
- last_exception = ""
-
- if total_timeout is None:
- total_timeout = 3600
- end = time.time() + total_timeout
- while time.time() < end:
- try:
- models = await self.controller.list_models()
- if model_name not in models:
- self.log.debug(
- "The model {} ({}) was destroyed".format(model_name, uuid)
+ # Destroy machines
+ machines = await model.get_machines()
+ for machine_id in machines:
+ try:
+ await self.destroy_machine(
+ model, machine_id=machine_id, total_timeout=total_timeout,
)
- return
- except asyncio.CancelledError:
- raise
- except Exception as e:
- last_exception = e
- await asyncio.sleep(5)
- raise Exception(
- "Timeout waiting for model {} to be destroyed {}".format(
- model_name, last_exception
+ except asyncio.CancelledError:
+ raise
+ except Exception:
+ pass
+
+ # Disconnect model
+ await self.disconnect_model(model)
+
+ # Destroy model
+ if model_name in self.models:
+ self.models.remove(model_name)
+
+ await controller.destroy_model(uuid)
+
+ # Wait until model is destroyed
+ self.log.debug("Waiting for model {} to be destroyed...".format(model_name))
+ last_exception = ""
+
+ if total_timeout is None:
+ total_timeout = 3600
+ end = time.time() + total_timeout
+ while time.time() < end:
+ try:
+ models = await controller.list_models()
+ if model_name not in models:
+ self.log.debug(
+ "The model {} ({}) was destroyed".format(model_name, uuid)
+ )
+ return
+ except asyncio.CancelledError:
+ raise
+ except Exception as e:
+ last_exception = e
+ await asyncio.sleep(5)
+ raise Exception(
+ "Timeout waiting for model {} to be destroyed {}".format(
+ model_name, last_exception
+ )
)
- )
+ finally:
+ await self.disconnect_controller(controller)
async def destroy_application(self, model: Model, application_name: str):
"""
:param: application_name: Application name
:param: config: Config to apply to the charm
"""
+ self.log.debug("Configuring application {}".format(application_name))
+
if config:
- model = await self.get_model(model_name)
- application = await self._get_application(
- model, application_name=application_name,
- )
- await application.set_config(config)
- await self.disconnect_model(model)
+ try:
+ controller = await self.get_controller()
+ model = await self.get_model(controller, model_name)
+ application = self._get_application(
+ model, application_name=application_name,
+ )
+ await application.set_config(config)
+ finally:
+ await self.disconnect_model(model)
+ await self.disconnect_controller(controller)
+
+ def _get_api_endpoints_db(self) -> [str]:
+ """
+ Get API Endpoints from DB
+
+ :return: List of API endpoints
+ """
+ self.log.debug("Getting endpoints from database")
+
+ juju_info = self.db.get_one(
+ DB_DATA.api_endpoints.table,
+ q_filter=DB_DATA.api_endpoints.filter,
+ fail_on_empty=False,
+ )
+ if juju_info and DB_DATA.api_endpoints.key in juju_info:
+ return juju_info[DB_DATA.api_endpoints.key]
+
+ def _update_api_endpoints_db(self, endpoints: [str]):
+ """
+ Update API endpoints in Database
+
+ :param: List of endpoints
+ """
+ self.log.debug("Saving endpoints {} in database".format(endpoints))
+
+ juju_info = self.db.get_one(
+ DB_DATA.api_endpoints.table,
+ q_filter=DB_DATA.api_endpoints.filter,
+ fail_on_empty=False,
+ )
+ # If it doesn't, then create it
+ if not juju_info:
+ try:
+ self.db.create(
+ DB_DATA.api_endpoints.table, DB_DATA.api_endpoints.filter,
+ )
+ except DbException as e:
+ # Racing condition: check if another N2VC worker has created it
+ juju_info = self.db.get_one(
+ DB_DATA.api_endpoints.table,
+ q_filter=DB_DATA.api_endpoints.filter,
+ fail_on_empty=False,
+ )
+ if not juju_info:
+ raise e
+ self.db.set_one(
+ DB_DATA.api_endpoints.table,
+ DB_DATA.api_endpoints.filter,
+ {DB_DATA.api_endpoints.key: endpoints},
+ )
+
+ def handle_exception(self, loop, context):
+ # All unhandled exceptions by libjuju are handled here.
+ pass
+
+ async def health_check(self, interval: float = 300.0):
+ """
+ Health check to make sure controller and controller_model connections are OK
+
+ :param: interval: Time in seconds between checks
+ """
+ while True:
+ try:
+ controller = await self.get_controller()
+ # self.log.debug("VCA is alive")
+ except Exception as e:
+ self.log.error("Health check to VCA failed: {}".format(e))
+ finally:
+ await self.disconnect_controller(controller)
+ await asyncio.sleep(interval)
projects / osm / N2VC.git / commitdiff