Add get_metrics command to n2vc_juju_conn and libjuju
[osm/N2VC.git] / n2vc / libjuju.py
index c62b11c..d761adc 100644 (file)
@@ -22,7 +22,12 @@ 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, QueryApplicationOffersResults
+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
@@ -242,7 +247,9 @@ class Libjuju:
         """
         if not model_names:
             raise Exception(
-                "model_names must be a non-empty array. Given value: {}".format(model_names)
+                "model_names must be a non-empty array. Given value: {}".format(
+                    model_names
+                )
             )
         non_existing_models = []
         models = await self.list_models()
@@ -624,7 +631,9 @@ class Libjuju:
                 if await u.is_leader_from_status():
                     unit = u
             if unit is None:
-                raise JujuLeaderUnitNotFound("Cannot execute action: leader unit not found")
+                raise JujuLeaderUnitNotFound(
+                    "Cannot execute action: leader unit not found"
+                )
 
             actions = await application.get_actions()
 
@@ -702,11 +711,28 @@ 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,
-        endpoint_1: str,
-        endpoint_2: str,
+        self, model_name: str, endpoint_1: str, endpoint_2: str,
     ):
         """Add relation
 
@@ -863,9 +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))
@@ -995,3 +1019,91 @@ class Libjuju:
             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)