| # Copyright 2019 Canonical Ltd. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import asyncio |
| from typing import Union |
| import os |
| import uuid |
| import yaml |
| import tempfile |
| import binascii |
| |
| from n2vc.config import EnvironConfig |
| from n2vc.definitions import RelationEndpoint |
| from n2vc.exceptions import K8sException |
| from n2vc.k8s_conn import K8sConnector |
| from n2vc.kubectl import Kubectl |
| from .exceptions import MethodNotImplemented |
| from n2vc.libjuju import Libjuju |
| from n2vc.utils import obj_to_dict, obj_to_yaml |
| from n2vc.store import MotorStore |
| from n2vc.vca.cloud import Cloud |
| from n2vc.vca.connection import get_connection |
| |
| |
| RBAC_LABEL_KEY_NAME = "rbac-id" |
| RBAC_STACK_PREFIX = "juju-credential" |
| |
| |
| def generate_rbac_id(): |
| return binascii.hexlify(os.urandom(4)).decode() |
| |
| |
| class K8sJujuConnector(K8sConnector): |
| libjuju = None |
| |
| def __init__( |
| self, |
| fs: object, |
| db: object, |
| kubectl_command: str = "/usr/bin/kubectl", |
| juju_command: str = "/usr/bin/juju", |
| log: object = None, |
| loop: object = None, |
| on_update_db=None, |
| ): |
| """ |
| :param fs: file system for kubernetes and helm configuration |
| :param db: Database object |
| :param kubectl_command: path to kubectl executable |
| :param helm_command: path to helm executable |
| :param log: logger |
| :param: loop: Asyncio loop |
| """ |
| |
| # parent class |
| K8sConnector.__init__(self, db, log=log, on_update_db=on_update_db) |
| |
| self.fs = fs |
| self.loop = loop or asyncio.get_event_loop() |
| self.log.debug("Initializing K8S Juju connector") |
| |
| db_uri = EnvironConfig(prefixes=["OSMLCM_", "OSMMON_"]).get("database_uri") |
| self._store = MotorStore(db_uri) |
| self.loading_libjuju = asyncio.Lock() |
| self.uninstall_locks = {} |
| |
| self.log.debug("K8S Juju connector initialized") |
| # TODO: Remove these commented lines: |
| # self.authenticated = False |
| # self.models = {} |
| # self.juju_secret = "" |
| |
| """Initialization""" |
| |
| async def init_env( |
| self, |
| k8s_creds: str, |
| namespace: str = "kube-system", |
| reuse_cluster_uuid: str = None, |
| **kwargs, |
| ) -> (str, bool): |
| """ |
| It prepares a given K8s cluster environment to run Juju bundles. |
| |
| :param k8s_creds: credentials to access a given K8s cluster, i.e. a valid |
| '.kube/config' |
| :param namespace: optional namespace to be used for juju. By default, |
| 'kube-system' will be used |
| :param reuse_cluster_uuid: existing cluster uuid for reuse |
| :param: kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: uuid of the K8s cluster and True if connector has installed some |
| software in the cluster |
| (on error, an exception will be raised) |
| """ |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| |
| cluster_uuid = reuse_cluster_uuid or str(uuid.uuid4()) |
| kubectl = self._get_kubectl(k8s_creds) |
| |
| # CREATING RESOURCES IN K8S |
| rbac_id = generate_rbac_id() |
| metadata_name = "{}-{}".format(RBAC_STACK_PREFIX, rbac_id) |
| labels = {RBAC_STACK_PREFIX: rbac_id} |
| |
| # Create cleanup dictionary to clean up created resources |
| # if it fails in the middle of the process |
| cleanup_data = [] |
| try: |
| self.log.debug("Initializing K8s cluster for juju") |
| kubectl.create_cluster_role(name=metadata_name, labels=labels) |
| self.log.debug("Cluster role created") |
| cleanup_data.append( |
| {"delete": kubectl.delete_cluster_role, "args": (metadata_name,)} |
| ) |
| |
| kubectl.create_service_account(name=metadata_name, labels=labels) |
| self.log.debug("Service account created") |
| cleanup_data.append( |
| {"delete": kubectl.delete_service_account, "args": (metadata_name,)} |
| ) |
| |
| kubectl.create_cluster_role_binding(name=metadata_name, labels=labels) |
| self.log.debug("Role binding created") |
| cleanup_data.append( |
| { |
| "delete": kubectl.delete_cluster_role_binding, |
| "args": (metadata_name,), |
| } |
| ) |
| token, client_cert_data = await kubectl.get_secret_data(metadata_name) |
| |
| default_storage_class = kubectl.get_default_storage_class() |
| self.log.debug("Default storage class: {}".format(default_storage_class)) |
| await libjuju.add_k8s( |
| name=cluster_uuid, |
| rbac_id=rbac_id, |
| token=token, |
| client_cert_data=client_cert_data, |
| configuration=kubectl.configuration, |
| storage_class=default_storage_class, |
| credential_name=self._get_credential_name(cluster_uuid), |
| ) |
| self.log.debug("K8s cluster added to juju controller") |
| return cluster_uuid, True |
| except Exception as e: |
| self.log.error("Error initializing k8scluster: {}".format(e), exc_info=True) |
| if len(cleanup_data) > 0: |
| self.log.debug("Cleaning up created resources in k8s cluster...") |
| for item in cleanup_data: |
| delete_function = item["delete"] |
| delete_args = item["args"] |
| delete_function(*delete_args) |
| self.log.debug("Cleanup finished") |
| raise e |
| |
| """Repo Management""" |
| |
| async def repo_add( |
| self, |
| name: str, |
| url: str, |
| _type: str = "charm", |
| cert: str = None, |
| user: str = None, |
| password: str = None, |
| ): |
| raise MethodNotImplemented() |
| |
| async def repo_list(self): |
| raise MethodNotImplemented() |
| |
| async def repo_remove(self, name: str): |
| raise MethodNotImplemented() |
| |
| async def synchronize_repos(self, cluster_uuid: str, name: str): |
| """ |
| Returns None as currently add_repo is not implemented |
| """ |
| return None |
| |
| """Reset""" |
| |
| async def reset( |
| self, |
| cluster_uuid: str, |
| force: bool = False, |
| uninstall_sw: bool = False, |
| **kwargs, |
| ) -> bool: |
| """Reset a cluster |
| |
| Resets the Kubernetes cluster by removing the model that represents it. |
| |
| :param cluster_uuid str: The UUID of the cluster to reset |
| :param force: Force reset |
| :param uninstall_sw: Boolean to uninstall sw |
| :param: kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: Returns True if successful or raises an exception. |
| """ |
| |
| try: |
| self.log.debug("[reset] Removing k8s cloud") |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| |
| cloud = Cloud(cluster_uuid, self._get_credential_name(cluster_uuid)) |
| |
| cloud_creds = await libjuju.get_cloud_credentials(cloud) |
| |
| await libjuju.remove_cloud(cluster_uuid) |
| |
| credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
| |
| kubectl = self._get_kubectl(credentials) |
| |
| delete_functions = [ |
| kubectl.delete_cluster_role_binding, |
| kubectl.delete_service_account, |
| kubectl.delete_cluster_role, |
| ] |
| |
| credential_attrs = cloud_creds[0].result["attrs"] |
| if RBAC_LABEL_KEY_NAME in credential_attrs: |
| rbac_id = credential_attrs[RBAC_LABEL_KEY_NAME] |
| metadata_name = "{}-{}".format(RBAC_STACK_PREFIX, rbac_id) |
| for delete_func in delete_functions: |
| try: |
| delete_func(metadata_name) |
| except Exception as e: |
| self.log.warning("Cannot remove resource in K8s {}".format(e)) |
| |
| except Exception as e: |
| self.log.debug("Caught exception during reset: {}".format(e)) |
| raise e |
| return True |
| |
| """Deployment""" |
| |
| async def install( |
| self, |
| cluster_uuid: str, |
| kdu_model: str, |
| kdu_instance: str, |
| atomic: bool = True, |
| timeout: float = 1800, |
| params: dict = None, |
| db_dict: dict = None, |
| kdu_name: str = None, |
| namespace: str = None, |
| **kwargs, |
| ) -> bool: |
| """Install a bundle |
| |
| :param cluster_uuid str: The UUID of the cluster to install to |
| :param kdu_model str: The name or path of a bundle to install |
| :param kdu_instance: Kdu instance name |
| :param atomic bool: If set, waits until the model is active and resets |
| the cluster on failure. |
| :param timeout int: The time, in seconds, to wait for the install |
| to finish |
| :param params dict: Key-value pairs of instantiation parameters |
| :param kdu_name: Name of the KDU instance to be installed |
| :param namespace: K8s namespace to use for the KDU instance |
| :param kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: If successful, returns ? |
| """ |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| bundle = kdu_model |
| |
| if not db_dict: |
| raise K8sException("db_dict must be set") |
| if not bundle: |
| raise K8sException("bundle must be set") |
| |
| if bundle.startswith("cs:"): |
| # For Juju Bundles provided by the Charm Store |
| pass |
| elif bundle.startswith("ch:"): |
| # For Juju Bundles provided by the Charm Hub (this only works for juju version >= 2.9) |
| pass |
| elif bundle.startswith("http"): |
| # Download the file |
| pass |
| else: |
| new_workdir = kdu_model.strip(kdu_model.split("/")[-1]) |
| os.chdir(new_workdir) |
| bundle = "local:{}".format(kdu_model) |
| |
| # default namespace to kdu_instance |
| if not namespace: |
| namespace = kdu_instance |
| |
| self.log.debug("Checking for model named {}".format(namespace)) |
| |
| # Create the new model |
| self.log.debug("Adding model: {}".format(namespace)) |
| cloud = Cloud(cluster_uuid, self._get_credential_name(cluster_uuid)) |
| await libjuju.add_model(namespace, cloud) |
| |
| # if model: |
| # TODO: Instantiation parameters |
| |
| """ |
| "Juju bundle that models the KDU, in any of the following ways: |
| - <juju-repo>/<juju-bundle> |
| - <juju-bundle folder under k8s_models folder in the package> |
| - <juju-bundle tgz file (w/ or w/o extension) under k8s_models folder |
| in the package> |
| - <URL_where_to_fetch_juju_bundle> |
| """ |
| try: |
| previous_workdir = os.getcwd() |
| except FileNotFoundError: |
| previous_workdir = "/app/storage" |
| |
| self.log.debug("[install] deploying {}".format(bundle)) |
| instantiation_params = params.get("overlay") if params else None |
| await libjuju.deploy( |
| bundle, |
| model_name=namespace, |
| wait=atomic, |
| timeout=timeout, |
| instantiation_params=instantiation_params, |
| ) |
| os.chdir(previous_workdir) |
| |
| # update information in the database (first, the VCA status, and then, the namespace) |
| if self.on_update_db: |
| await self.on_update_db( |
| cluster_uuid, |
| kdu_instance, |
| filter=db_dict["filter"], |
| vca_id=kwargs.get("vca_id"), |
| ) |
| |
| self.db.set_one( |
| table="nsrs", |
| q_filter={"_admin.deployed.K8s.kdu-instance": kdu_instance}, |
| update_dict={"_admin.deployed.K8s.$.namespace": namespace}, |
| ) |
| |
| return True |
| |
| async def scale( |
| self, |
| kdu_instance: str, |
| scale: int, |
| resource_name: str, |
| total_timeout: float = 1800, |
| namespace: str = None, |
| **kwargs, |
| ) -> bool: |
| """Scale an application in a model |
| |
| :param: kdu_instance str: KDU instance name |
| :param: scale int: Scale to which to set the application |
| :param: resource_name str: The application name in the Juju Bundle |
| :param: timeout float: The time, in seconds, to wait for the install |
| to finish |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: If successful, returns True |
| """ |
| |
| model_name = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| try: |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| await libjuju.scale_application( |
| model_name=model_name, |
| application_name=resource_name, |
| scale=scale, |
| total_timeout=total_timeout, |
| ) |
| except Exception as e: |
| error_msg = "Error scaling application {} of the model {} of the kdu instance {}: {}".format( |
| resource_name, model_name, kdu_instance, e |
| ) |
| self.log.error(error_msg) |
| raise K8sException(message=error_msg) |
| return True |
| |
| async def get_scale_count( |
| self, resource_name: str, kdu_instance: str, namespace: str = None, **kwargs |
| ) -> int: |
| """Get an application scale count |
| |
| :param: resource_name str: The application name in the Juju Bundle |
| :param: kdu_instance str: KDU instance name |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param kwargs: Additional parameters |
| vca_id (str): VCA ID |
| :return: Return application instance count |
| """ |
| |
| model_name = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| try: |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| status = await libjuju.get_model_status(model_name=model_name) |
| return len(status.applications[resource_name].units) |
| except Exception as e: |
| error_msg = ( |
| f"Error getting scale count from application {resource_name} of the model {model_name} of " |
| f"the kdu instance {kdu_instance}: {e}" |
| ) |
| self.log.error(error_msg) |
| raise K8sException(message=error_msg) |
| |
| async def instances_list(self, cluster_uuid: str) -> list: |
| """ |
| returns a list of deployed releases in a cluster |
| |
| :param cluster_uuid: the cluster |
| :return: |
| """ |
| return [] |
| |
| async def upgrade( |
| self, |
| cluster_uuid: str, |
| kdu_instance: str, |
| kdu_model: str = None, |
| params: dict = None, |
| ) -> str: |
| """Upgrade a model |
| |
| :param cluster_uuid str: The UUID of the cluster to upgrade |
| :param kdu_instance str: The unique name of the KDU instance |
| :param kdu_model str: The name or path of the bundle to upgrade to |
| :param params dict: Key-value pairs of instantiation parameters |
| |
| :return: If successful, reference to the new revision number of the |
| KDU instance. |
| """ |
| |
| # TODO: Loop through the bundle and upgrade each charm individually |
| |
| """ |
| The API doesn't have a concept of bundle upgrades, because there are |
| many possible changes: charm revision, disk, number of units, etc. |
| |
| As such, we are only supporting a limited subset of upgrades. We'll |
| upgrade the charm revision but leave storage and scale untouched. |
| |
| Scale changes should happen through OSM constructs, and changes to |
| storage would require a redeployment of the service, at least in this |
| initial release. |
| """ |
| raise MethodNotImplemented() |
| |
| """Rollback""" |
| |
| async def rollback( |
| self, cluster_uuid: str, kdu_instance: str, revision: int = 0 |
| ) -> str: |
| """Rollback a model |
| |
| :param cluster_uuid str: The UUID of the cluster to rollback |
| :param kdu_instance str: The unique name of the KDU instance |
| :param revision int: The revision to revert to. If omitted, rolls back |
| the previous upgrade. |
| |
| :return: If successful, returns the revision of active KDU instance, |
| or raises an exception |
| """ |
| raise MethodNotImplemented() |
| |
| """Deletion""" |
| |
| async def uninstall( |
| self, cluster_uuid: str, kdu_instance: str, namespace: str = None, **kwargs |
| ) -> bool: |
| """Uninstall a KDU instance |
| |
| :param cluster_uuid str: The UUID of the cluster |
| :param kdu_instance str: The unique name of the KDU instance |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: Returns True if successful, or raises an exception |
| """ |
| model_name = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| |
| self.log.debug(f"[uninstall] Destroying model: {model_name}") |
| |
| will_not_delete = False |
| if model_name not in self.uninstall_locks: |
| self.uninstall_locks[model_name] = asyncio.Lock() |
| delete_lock = self.uninstall_locks[model_name] |
| |
| while delete_lock.locked(): |
| will_not_delete = True |
| await asyncio.sleep(0.1) |
| |
| if will_not_delete: |
| self.log.info("Model {} deleted by another worker.".format(model_name)) |
| return True |
| |
| try: |
| async with delete_lock: |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| |
| await libjuju.destroy_model(model_name, total_timeout=3600) |
| finally: |
| self.uninstall_locks.pop(model_name) |
| |
| self.log.debug(f"[uninstall] Model {model_name} destroyed") |
| return True |
| |
| async def upgrade_charm( |
| self, |
| ee_id: str = None, |
| path: str = None, |
| charm_id: str = None, |
| charm_type: str = None, |
| timeout: float = None, |
| ) -> str: |
| """This method upgrade charms in VNFs |
| |
| Args: |
| ee_id: Execution environment id |
| path: Local path to the charm |
| charm_id: charm-id |
| charm_type: Charm type can be lxc-proxy-charm, native-charm or k8s-proxy-charm |
| timeout: (Float) Timeout for the ns update operation |
| |
| Returns: |
| The output of the update operation if status equals to "completed" |
| """ |
| raise K8sException( |
| "KDUs deployed with Juju Bundle do not support charm upgrade" |
| ) |
| |
| async def exec_primitive( |
| self, |
| cluster_uuid: str = None, |
| kdu_instance: str = None, |
| primitive_name: str = None, |
| timeout: float = 300, |
| params: dict = None, |
| db_dict: dict = None, |
| namespace: str = None, |
| **kwargs, |
| ) -> str: |
| """Exec primitive (Juju action) |
| |
| :param cluster_uuid str: The UUID of the cluster |
| :param kdu_instance str: The unique name of the KDU instance |
| :param primitive_name: Name of action that will be executed |
| :param timeout: Timeout for action execution |
| :param params: Dictionary of all the parameters needed for the action |
| :param db_dict: Dictionary for any additional data |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: Returns the output of the action |
| """ |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| |
| namespace = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| |
| if not params or "application-name" not in params: |
| raise K8sException( |
| "Missing application-name argument, \ |
| argument needed for K8s actions" |
| ) |
| try: |
| self.log.debug( |
| "[exec_primitive] Getting model " |
| "{} for the kdu_instance: {}".format(namespace, kdu_instance) |
| ) |
| application_name = params["application-name"] |
| actions = await libjuju.get_actions( |
| application_name=application_name, model_name=namespace |
| ) |
| if primitive_name not in actions: |
| raise K8sException("Primitive {} not found".format(primitive_name)) |
| output, status = await libjuju.execute_action( |
| application_name=application_name, |
| model_name=namespace, |
| action_name=primitive_name, |
| **params, |
| ) |
| |
| if status != "completed": |
| raise K8sException( |
| "status is not completed: {} output: {}".format(status, output) |
| ) |
| if self.on_update_db: |
| await self.on_update_db( |
| cluster_uuid=cluster_uuid, |
| kdu_instance=kdu_instance, |
| filter=db_dict["filter"], |
| ) |
| |
| return output |
| |
| except Exception as e: |
| error_msg = "Error executing primitive {}: {}".format(primitive_name, e) |
| self.log.error(error_msg) |
| raise K8sException(message=error_msg) |
| |
| """Introspection""" |
| |
| async def inspect_kdu(self, kdu_model: str) -> dict: |
| """Inspect a KDU |
| |
| Inspects a bundle and returns a dictionary of config parameters and |
| their default values. |
| |
| :param kdu_model str: The name or path of the bundle to inspect. |
| |
| :return: If successful, returns a dictionary of available parameters |
| and their default values. |
| """ |
| |
| kdu = {} |
| if not os.path.exists(kdu_model): |
| raise K8sException("file {} not found".format(kdu_model)) |
| |
| with open(kdu_model, "r") as f: |
| bundle = yaml.safe_load(f.read()) |
| |
| """ |
| { |
| 'description': 'Test bundle', |
| 'bundle': 'kubernetes', |
| 'applications': { |
| 'mariadb-k8s': { |
| 'charm': 'cs:~charmed-osm/mariadb-k8s-20', |
| 'scale': 1, |
| 'options': { |
| 'password': 'manopw', |
| 'root_password': 'osm4u', |
| 'user': 'mano' |
| }, |
| 'series': 'kubernetes' |
| } |
| } |
| } |
| """ |
| # TODO: This should be returned in an agreed-upon format |
| kdu = bundle["applications"] |
| |
| return kdu |
| |
| async def help_kdu(self, kdu_model: str) -> str: |
| """View the README |
| |
| If available, returns the README of the bundle. |
| |
| :param kdu_model str: The name or path of a bundle |
| f |
| :return: If found, returns the contents of the README. |
| """ |
| readme = None |
| |
| files = ["README", "README.txt", "README.md"] |
| path = os.path.dirname(kdu_model) |
| for file in os.listdir(path): |
| if file in files: |
| with open(file, "r") as f: |
| readme = f.read() |
| break |
| |
| return readme |
| |
| async def status_kdu( |
| self, |
| cluster_uuid: str, |
| kdu_instance: str, |
| complete_status: bool = False, |
| yaml_format: bool = False, |
| namespace: str = None, |
| **kwargs, |
| ) -> Union[str, dict]: |
| """Get the status of the KDU |
| |
| Get the current status of the KDU instance. |
| |
| :param cluster_uuid str: The UUID of the cluster |
| :param kdu_instance str: The unique id of the KDU instance |
| :param complete_status: To get the complete_status of the KDU |
| :param yaml_format: To get the status in proper format for NSR record |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param: kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: Returns a dictionary containing namespace, state, resources, |
| and deployment_time and returns complete_status if complete_status is True |
| """ |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| status = {} |
| |
| model_name = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| model_status = await libjuju.get_model_status(model_name=model_name) |
| |
| if not complete_status: |
| for name in model_status.applications: |
| application = model_status.applications[name] |
| status[name] = {"status": application["status"]["status"]} |
| else: |
| if yaml_format: |
| return obj_to_yaml(model_status) |
| else: |
| return obj_to_dict(model_status) |
| |
| return status |
| |
| async def add_relation( |
| self, provider: RelationEndpoint, requirer: RelationEndpoint |
| ): |
| """ |
| Add relation between two charmed endpoints |
| |
| :param: provider: Provider relation endpoint |
| :param: requirer: Requirer relation endpoint |
| """ |
| self.log.debug(f"adding new relation between {provider} and {requirer}") |
| cross_model_relation = ( |
| provider.model_name != requirer.model_name |
| or provider.vca_id != requirer.vca_id |
| ) |
| try: |
| if cross_model_relation: |
| # Cross-model relation |
| provider_libjuju = await self._get_libjuju(provider.vca_id) |
| requirer_libjuju = await self._get_libjuju(requirer.vca_id) |
| offer = await provider_libjuju.offer(provider) |
| if offer: |
| saas_name = await requirer_libjuju.consume( |
| requirer.model_name, offer, provider_libjuju |
| ) |
| await requirer_libjuju.add_relation( |
| requirer.model_name, requirer.endpoint, saas_name |
| ) |
| else: |
| # Standard relation |
| vca_id = provider.vca_id |
| model = provider.model_name |
| libjuju = await self._get_libjuju(vca_id) |
| # add juju relations between two applications |
| await libjuju.add_relation( |
| model_name=model, |
| endpoint_1=provider.endpoint, |
| endpoint_2=requirer.endpoint, |
| ) |
| except Exception as e: |
| message = f"Error adding relation between {provider} and {requirer}: {e}" |
| self.log.error(message) |
| raise Exception(message=message) |
| |
| async def update_vca_status( |
| self, vcastatus: dict, kdu_instance: str, namespace: str = None, **kwargs |
| ): |
| """ |
| Add all configs, actions, executed actions of all applications in a model to vcastatus dict |
| |
| :param vcastatus dict: dict containing vcastatus |
| :param kdu_instance str: The unique id of the KDU instance |
| :param namespace str: The namespace (model) where the Bundle was deployed |
| :param: kwargs: Additional parameters |
| vca_id (str): VCA ID |
| |
| :return: None |
| """ |
| |
| model_name = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| |
| libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| try: |
| for vca_model_name in vcastatus: |
| # Adding executed actions |
| vcastatus[vca_model_name][ |
| "executedActions" |
| ] = await libjuju.get_executed_actions(model_name=model_name) |
| |
| for application in vcastatus[vca_model_name]["applications"]: |
| # Adding application actions |
| vcastatus[vca_model_name]["applications"][application][ |
| "actions" |
| ] = {} |
| # Adding application configs |
| vcastatus[vca_model_name]["applications"][application][ |
| "configs" |
| ] = await libjuju.get_application_configs( |
| model_name=model_name, application_name=application |
| ) |
| |
| except Exception as e: |
| self.log.debug("Error in updating vca status: {}".format(str(e))) |
| |
| async def get_services( |
| self, cluster_uuid: str, kdu_instance: str, namespace: str |
| ) -> list: |
| """Return a list of services of a kdu_instance""" |
| |
| namespace = self._obtain_namespace( |
| kdu_instance=kdu_instance, namespace=namespace |
| ) |
| |
| credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
| kubectl = self._get_kubectl(credentials) |
| return kubectl.get_services( |
| field_selector="metadata.namespace={}".format(namespace) |
| ) |
| |
| async def get_service( |
| self, cluster_uuid: str, service_name: str, namespace: str |
| ) -> object: |
| """Return data for a specific service inside a namespace""" |
| |
| credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
| kubectl = self._get_kubectl(credentials) |
| return kubectl.get_services( |
| field_selector="metadata.name={},metadata.namespace={}".format( |
| service_name, namespace |
| ) |
| )[0] |
| |
| def get_credentials(self, cluster_uuid: str) -> str: |
| """ |
| Get Cluster Kubeconfig |
| """ |
| k8scluster = self.db.get_one( |
| "k8sclusters", q_filter={"_id": cluster_uuid}, fail_on_empty=False |
| ) |
| |
| self.db.encrypt_decrypt_fields( |
| k8scluster.get("credentials"), |
| "decrypt", |
| ["password", "secret"], |
| schema_version=k8scluster["schema_version"], |
| salt=k8scluster["_id"], |
| ) |
| |
| return yaml.safe_dump(k8scluster.get("credentials")) |
| |
| def _get_credential_name(self, cluster_uuid: str) -> str: |
| """ |
| Get credential name for a k8s cloud |
| |
| We cannot use the cluster_uuid for the credential name directly, |
| because it cannot start with a number, it must start with a letter. |
| Therefore, the k8s cloud credential name will be "cred-" followed |
| by the cluster uuid. |
| |
| :param: cluster_uuid: Cluster UUID of the kubernetes cloud (=cloud_name) |
| |
| :return: Name to use for the credential name. |
| """ |
| return "cred-{}".format(cluster_uuid) |
| |
| def get_namespace(self, cluster_uuid: str) -> str: |
| """Get the namespace UUID |
| Gets the namespace's unique name |
| |
| :param cluster_uuid str: The UUID of the cluster |
| :returns: The namespace UUID, or raises an exception |
| """ |
| pass |
| |
| @staticmethod |
| def generate_kdu_instance_name(**kwargs): |
| db_dict = kwargs.get("db_dict") |
| kdu_name = kwargs.get("kdu_name", None) |
| if kdu_name: |
| kdu_instance = "{}-{}".format(kdu_name, db_dict["filter"]["_id"]) |
| else: |
| kdu_instance = db_dict["filter"]["_id"] |
| return kdu_instance |
| |
| async def _get_libjuju(self, vca_id: str = None) -> Libjuju: |
| """ |
| Get libjuju object |
| |
| :param: vca_id: VCA ID |
| If None, get a libjuju object with a Connection to the default VCA |
| Else, geta libjuju object with a Connection to the specified VCA |
| """ |
| if not vca_id: |
| while self.loading_libjuju.locked(): |
| await asyncio.sleep(0.1) |
| if not self.libjuju: |
| async with self.loading_libjuju: |
| vca_connection = await get_connection(self._store) |
| self.libjuju = Libjuju(vca_connection, loop=self.loop, log=self.log) |
| return self.libjuju |
| else: |
| vca_connection = await get_connection(self._store, vca_id) |
| return Libjuju(vca_connection, loop=self.loop, log=self.log, n2vc=self) |
| |
| def _get_kubectl(self, credentials: str) -> Kubectl: |
| """ |
| Get Kubectl object |
| |
| :param: kubeconfig_credentials: Kubeconfig credentials |
| """ |
| kubecfg = tempfile.NamedTemporaryFile() |
| with open(kubecfg.name, "w") as kubecfg_file: |
| kubecfg_file.write(credentials) |
| return Kubectl(config_file=kubecfg.name) |
| |
| def _obtain_namespace(self, kdu_instance: str, namespace: str = None) -> str: |
| """ |
| Obtain the namespace/model name to use in the instantiation of a Juju Bundle in K8s. The default namespace is |
| the kdu_instance name. However, if the user passes the namespace where he wants to deploy the bundle, |
| that namespace will be used. |
| |
| :param kdu_instance: the default KDU instance name |
| :param namespace: the namespace passed by the User |
| """ |
| |
| # deault the namespace/model name to the kdu_instance name TODO -> this should be the real return... But |
| # once the namespace is not passed in most methods, I had to do this in another way. But I think this should |
| # be the procedure in the future return namespace if namespace else kdu_instance |
| |
| # TODO -> has referred above, this should be avoided in the future, this is temporary, in order to avoid |
| # compatibility issues |
| return ( |
| namespace |
| if namespace |
| else self._obtain_namespace_from_db(kdu_instance=kdu_instance) |
| ) |
| |
| def _obtain_namespace_from_db(self, kdu_instance: str) -> str: |
| db_nsrs = self.db.get_one( |
| table="nsrs", q_filter={"_admin.deployed.K8s.kdu-instance": kdu_instance} |
| ) |
| for k8s in db_nsrs["_admin"]["deployed"]["K8s"]: |
| if k8s.get("kdu-instance") == kdu_instance: |
| return k8s.get("namespace") |
| return "" |