Add get_metrics command to n2vc_juju_conn and libjuju
[osm/N2VC.git] / n2vc / libjuju.py
index be16e2a..d761adc 100644 (file)
@@ -22,13 +22,20 @@ from juju.errors import JujuAPIError
 from juju.model import Model
 from juju.machine import Machine
 from juju.application import Application
-from juju.client._definitions import FullStatus
+from juju.client._definitions import (
+    FullStatus,
+    QueryApplicationOffersResults,
+    Cloud,
+    CloudCredential,
+)
 from n2vc.juju_watcher import JujuModelWatcher
 from n2vc.provisioner import AsyncSSHProvisioner
 from n2vc.n2vc_conn import N2VCConnector
 from n2vc.exceptions import (
     JujuMachineNotFound,
     JujuApplicationNotFound,
+    JujuLeaderUnitNotFound,
+    JujuActionNotFound,
     JujuModelAlreadyExists,
     JujuControllerFailedConnecting,
     JujuApplicationExists,
@@ -230,6 +237,30 @@ class Libjuju:
             if need_to_disconnect:
                 await self.disconnect_controller(controller)
 
+    async def models_exist(self, model_names: [str]) -> (bool, list):
+        """
+        Check if models exists
+
+        :param: model_names: List of strings with model names
+
+        :return (bool, list[str]): (True if all models exists, List of model names that don't exist)
+        """
+        if not model_names:
+            raise Exception(
+                "model_names must be a non-empty array. Given value: {}".format(
+                    model_names
+                )
+            )
+        non_existing_models = []
+        models = await self.list_models()
+        existing_models = list(set(models).intersection(model_names))
+        non_existing_models = list(set(model_names) - set(existing_models))
+
+        return (
+            len(non_existing_models) == 0,
+            non_existing_models,
+        )
+
     async def get_model_status(self, model_name: str) -> FullStatus:
         """
         Get model status
@@ -298,7 +329,7 @@ class Libjuju:
                             machine_id, model_name
                         )
                     )
-                    machine = model.machines[machine_id]
+                    machine = machines[machine_id]
                 else:
                     raise JujuMachineNotFound("Machine {} not found".format(machine_id))
 
@@ -406,7 +437,7 @@ class Libjuju:
                     connection=connection,
                     nonce=params.nonce,
                     machine_id=machine_id,
-                    api=self.api_proxy,
+                    proxy=self.api_proxy,
                 )
             )
 
@@ -570,7 +601,6 @@ class Libjuju:
 
         :param: application_name:   Application name
         :param: model_name:         Model name
-        :param: cloud_name:         Cloud name
         :param: action_name:        Name of the action
         :param: db_dict:            Dictionary with data of the DB to write the updates
         :param: progress_timeout:   Maximum time between two updates in the model
@@ -601,12 +631,14 @@ class Libjuju:
                 if await u.is_leader_from_status():
                     unit = u
             if unit is None:
-                raise Exception("Cannot execute action: leader unit not found")
+                raise JujuLeaderUnitNotFound(
+                    "Cannot execute action: leader unit not found"
+                )
 
             actions = await application.get_actions()
 
             if action_name not in actions:
-                raise Exception(
+                raise JujuActionNotFound(
                     "Action {} not in available actions".format(action_name)
                 )
 
@@ -637,8 +669,6 @@ class Libjuju:
                     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)
@@ -681,24 +711,38 @@ class Libjuju:
             await self.disconnect_model(model)
             await self.disconnect_controller(controller)
 
+    async def get_metrics(self, model_name: str, application_name: str) -> dict:
+        """Get the metrics collected by the VCA.
+
+        :param model_name The name or unique id of the network service
+        :param application_name The name of the application
+        """
+        if not model_name or not application_name:
+            raise Exception("model_name and application_name must be non-empty strings")
+        metrics = {}
+        controller = await self.get_controller()
+        model = await self.get_model(controller, model_name)
+        try:
+            application = self._get_application(model, application_name)
+            if application is not None:
+                metrics = await application.get_metrics()
+        finally:
+            self.disconnect_model(model)
+            self.disconnect_controller(controller)
+        return metrics
+
     async def add_relation(
-        self,
-        model_name: str,
-        application_name_1: str,
-        application_name_2: str,
-        relation_1: str,
-        relation_2: str,
+        self, model_name: str, endpoint_1: str, endpoint_2: str,
     ):
         """Add relation
 
-        :param: model_name:             Model name
-        :param: application_name_1      First application name
-        :param: application_name_2:     Second application name
-        :param: relation_1:             First relation name
-        :param: relation_2:             Second relation name
+        :param: model_name:     Model name
+        :param: endpoint_1      First endpoint name
+                                ("app:endpoint" format or directly the saas name)
+        :param: endpoint_2:     Second endpoint name (^ same format)
         """
 
-        self.log.debug("Adding relation: {} -> {}".format(relation_1, relation_2))
+        self.log.debug("Adding relation: {} -> {}".format(endpoint_1, endpoint_2))
 
         # Get controller
         controller = await self.get_controller()
@@ -706,13 +750,9 @@ class Libjuju:
         # Get model
         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
         try:
-            await model.add_relation(relation1=r1, relation2=r2)
+            await model.add_relation(endpoint_1, endpoint_2)
         except JujuAPIError as e:
             if "not found" in e.message:
                 self.log.warning("Relation not found: {}".format(e.message))
@@ -726,6 +766,28 @@ class Libjuju:
             await self.disconnect_model(model)
             await self.disconnect_controller(controller)
 
+    async def consume(
+        self, offer_url: str, model_name: str,
+    ):
+        """
+        Adds a remote offer to the model. Relations can be created later using "juju relate".
+
+        :param: offer_url:      Offer Url
+        :param: model_name:     Model name
+
+        :raises ParseError if there's a problem parsing the offer_url
+        :raises JujuError if remote offer includes and endpoint
+        :raises JujuAPIError if the operation is not successful
+        """
+        controller = await self.get_controller()
+        model = await controller.get_model(model_name)
+
+        try:
+            await model.consume(offer_url)
+        finally:
+            await self.disconnect_model(model)
+            await self.disconnect_controller(controller)
+
     async def destroy_model(self, model_name: str, total_timeout: float):
         """
         Destroy model
@@ -819,7 +881,7 @@ class Libjuju:
         """
         machines = await model.get_machines()
         if machine_id in machines:
-            machine = model.machines[machine_id]
+            machine = machines[machine_id]
             await machine.destroy(force=True)
             # max timeout
             end = time.time() + total_timeout
@@ -827,9 +889,7 @@ class Libjuju:
             # wait for machine removal
             machines = await model.get_machines()
             while machine_id in machines and time.time() < end:
-                self.log.debug(
-                    "Waiting for machine {} is destroyed".format(machine_id)
-                )
+                self.log.debug("Waiting for machine {} is destroyed".format(machine_id))
                 await asyncio.sleep(0.5)
                 machines = await model.get_machines()
             self.log.debug("Machine destroyed: {}".format(machine_id))
@@ -945,3 +1005,105 @@ class Libjuju:
             return models
         finally:
             await self.disconnect_controller(controller)
+
+    async def list_offers(self, model_name: str) -> QueryApplicationOffersResults:
+        """List models with certain names
+
+        :param: model_name: Model name
+
+        :return:            Returns list of offers
+        """
+
+        controller = await self.get_controller()
+        try:
+            return await controller.list_offers(model_name)
+        finally:
+            await self.disconnect_controller(controller)
+
+    async def add_k8s(self, name: str, auth_data: dict, storage_class: str):
+        """
+        Add a Kubernetes cloud to the controller
+
+        Similar to the `juju add-k8s` command in the CLI
+
+        :param: name:           Name for the K8s cloud
+        :param: auth_data:      Dictionary with needed credentials. Format:
+        {
+            "server": "192.168.0.21:16443",
+            "cacert": "-----BEGIN CERTIFI...",
+            "token": "clhkRExRem5Xd1dCdnFEVXdvRGt...",
+
+        }
+        :param: storage_class:  Storage Class to use in the cloud
+        """
+
+        required_auth_data_keys = ["server", "cacert", "token"]
+        missing_keys = []
+        for k in required_auth_data_keys:
+            if k not in auth_data:
+                missing_keys.append(k)
+        if missing_keys:
+            raise Exception(
+                "missing keys in auth_data: {}".format(",".join(missing_keys))
+            )
+        if not storage_class:
+            raise Exception("storage_class must be a non-empty string")
+        if not name:
+            raise Exception("name must be a non-empty string")
+
+        endpoint = auth_data["server"]
+        cacert = auth_data["cacert"]
+        token = auth_data["token"]
+        region_name = "{}-region".format(name)
+
+        cloud = client.Cloud(
+            auth_types=["certificate"],
+            ca_certificates=[cacert],
+            endpoint=endpoint,
+            config={
+                "operator-storage": storage_class,
+                "workload-storage": storage_class,
+            },
+            regions=[client.CloudRegion(endpoint=endpoint, name=region_name)],
+            type_="kubernetes",
+        )
+
+        cred = client.CloudCredential(
+            auth_type="certificate",
+            attrs={"ClientCertificateData": cacert, "Token": token},
+        )
+        return await self.add_cloud(name, cloud, cred)
+
+    async def add_cloud(
+        self, name: str, cloud: Cloud, credential: CloudCredential = None
+    ) -> Cloud:
+        """
+        Add cloud to the controller
+
+        :param: name:   Name of the cloud to be added
+        :param: cloud:  Cloud object
+        :param: credential:   CloudCredentials object for the cloud
+        """
+        controller = await self.get_controller()
+        try:
+            _ = await controller.add_cloud(name, cloud)
+            if credential:
+                await controller.add_credential(name, credential=credential, cloud=name)
+            # Need to return the object returned by the controller.add_cloud() function
+            # I'm returning the original value now until this bug is fixed:
+            #   https://github.com/juju/python-libjuju/issues/443
+            return cloud
+        finally:
+            await self.disconnect_controller(controller)
+
+    async def remove_cloud(self, name: str):
+        """
+        Remove cloud
+
+        :param: name:   Name of the cloud to be removed
+        """
+        controller = await self.get_controller()
+        try:
+            await controller.remove_cloud(name)
+        finally:
+            await self.disconnect_controller(controller)