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# Copyright 2019 Canonical Ltd. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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|
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import asyncio |
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from typing import Union |
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import os |
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import uuid |
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import yaml |
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import tempfile |
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import binascii |
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|
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from n2vc.config import EnvironConfig |
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from n2vc.definitions import RelationEndpoint |
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from n2vc.exceptions import K8sException |
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from n2vc.k8s_conn import K8sConnector |
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from n2vc.kubectl import Kubectl |
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from .exceptions import MethodNotImplemented |
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from n2vc.libjuju import Libjuju |
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from n2vc.utils import obj_to_dict, obj_to_yaml |
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from n2vc.store import MotorStore |
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from n2vc.vca.cloud import Cloud |
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from n2vc.vca.connection import get_connection |
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RBAC_LABEL_KEY_NAME = "rbac-id" |
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RBAC_STACK_PREFIX = "juju-credential" |
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|
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|
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def generate_rbac_id(): |
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return binascii.hexlify(os.urandom(4)).decode() |
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class K8sJujuConnector(K8sConnector): |
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libjuju = None |
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|
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def __init__( |
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self, |
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fs: object, |
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db: object, |
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kubectl_command: str = "/usr/bin/kubectl", |
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juju_command: str = "/usr/bin/juju", |
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log: object = None, |
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loop: object = None, |
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on_update_db=None, |
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): |
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""" |
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:param fs: file system for kubernetes and helm configuration |
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:param db: Database object |
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:param kubectl_command: path to kubectl executable |
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:param helm_command: path to helm executable |
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:param log: logger |
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:param: loop: Asyncio loop |
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""" |
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# parent class |
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K8sConnector.__init__( |
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self, |
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db, |
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log=log, |
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on_update_db=on_update_db, |
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) |
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|
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self.fs = fs |
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self.loop = loop or asyncio.get_event_loop() |
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self.log.debug("Initializing K8S Juju connector") |
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|
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db_uri = EnvironConfig(prefixes=["OSMLCM_", "OSMMON_"]).get("database_uri") |
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self._store = MotorStore(db_uri) |
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self.loading_libjuju = asyncio.Lock(loop=self.loop) |
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self.uninstall_locks = {} |
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|
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self.log.debug("K8S Juju connector initialized") |
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# TODO: Remove these commented lines: |
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# self.authenticated = False |
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# self.models = {} |
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# self.juju_secret = "" |
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"""Initialization""" |
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async def init_env( |
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self, |
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k8s_creds: str, |
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namespace: str = "kube-system", |
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reuse_cluster_uuid: str = None, |
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**kwargs, |
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) -> (str, bool): |
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""" |
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It prepares a given K8s cluster environment to run Juju bundles. |
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:param k8s_creds: credentials to access a given K8s cluster, i.e. a valid |
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'.kube/config' |
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:param namespace: optional namespace to be used for juju. By default, |
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'kube-system' will be used |
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:param reuse_cluster_uuid: existing cluster uuid for reuse |
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:param: kwargs: Additional parameters |
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vca_id (str): VCA ID |
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:return: uuid of the K8s cluster and True if connector has installed some |
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software in the cluster |
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(on error, an exception will be raised) |
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""" |
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libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
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cluster_uuid = reuse_cluster_uuid or str(uuid.uuid4()) |
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kubectl = self._get_kubectl(k8s_creds) |
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|
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# CREATING RESOURCES IN K8S |
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rbac_id = generate_rbac_id() |
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metadata_name = "{}-{}".format(RBAC_STACK_PREFIX, rbac_id) |
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labels = {RBAC_STACK_PREFIX: rbac_id} |
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|
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# Create cleanup dictionary to clean up created resources |
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# if it fails in the middle of the process |
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cleanup_data = [] |
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try: |
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self.log.debug("Initializing K8s cluster for juju") |
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kubectl.create_cluster_role( |
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name=metadata_name, |
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labels=labels, |
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) |
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self.log.debug("Cluster role created") |
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cleanup_data.append( |
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{ |
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"delete": kubectl.delete_cluster_role, |
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"args": (metadata_name,), |
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} |
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) |
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kubectl.create_service_account( |
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name=metadata_name, |
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labels=labels, |
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) |
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self.log.debug("Service account created") |
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cleanup_data.append( |
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{ |
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"delete": kubectl.delete_service_account, |
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"args": (metadata_name,), |
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} |
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) |
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kubectl.create_cluster_role_binding( |
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name=metadata_name, |
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labels=labels, |
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) |
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self.log.debug("Role binding created") |
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cleanup_data.append( |
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{ |
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"delete": kubectl.delete_cluster_role_binding, |
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"args": (metadata_name,), |
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} |
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) |
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token, client_cert_data = await kubectl.get_secret_data( |
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metadata_name, |
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) |
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default_storage_class = kubectl.get_default_storage_class() |
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self.log.debug("Default storage class: {}".format(default_storage_class)) |
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await libjuju.add_k8s( |
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name=cluster_uuid, |
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rbac_id=rbac_id, |
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token=token, |
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client_cert_data=client_cert_data, |
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configuration=kubectl.configuration, |
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storage_class=default_storage_class, |
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credential_name=self._get_credential_name(cluster_uuid), |
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) |
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self.log.debug("K8s cluster added to juju controller") |
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return cluster_uuid, True |
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except Exception as e: |
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self.log.error("Error initializing k8scluster: {}".format(e), exc_info=True) |
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if len(cleanup_data) > 0: |
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self.log.debug("Cleaning up created resources in k8s cluster...") |
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for item in cleanup_data: |
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delete_function = item["delete"] |
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delete_args = item["args"] |
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delete_function(*delete_args) |
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self.log.debug("Cleanup finished") |
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raise e |
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"""Repo Management""" |
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|
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async def repo_add( |
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self, |
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name: str, |
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url: str, |
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_type: str = "charm", |
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cert: str = None, |
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user: str = None, |
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password: str = None, |
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): |
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raise MethodNotImplemented() |
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|
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async def repo_list(self): |
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raise MethodNotImplemented() |
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async def repo_remove( |
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self, |
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name: str, |
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): |
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raise MethodNotImplemented() |
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async def synchronize_repos(self, cluster_uuid: str, name: str): |
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""" |
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Returns None as currently add_repo is not implemented |
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""" |
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return None |
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|
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"""Reset""" |
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|
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async def reset( |
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self, |
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cluster_uuid: str, |
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force: bool = False, |
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uninstall_sw: bool = False, |
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**kwargs, |
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) -> bool: |
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"""Reset a cluster |
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Resets the Kubernetes cluster by removing the model that represents it. |
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:param cluster_uuid str: The UUID of the cluster to reset |
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:param force: Force reset |
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:param uninstall_sw: Boolean to uninstall sw |
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:param: kwargs: Additional parameters |
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vca_id (str): VCA ID |
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:return: Returns True if successful or raises an exception. |
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""" |
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|
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try: |
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self.log.debug("[reset] Removing k8s cloud") |
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libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
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|
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cloud = Cloud(cluster_uuid, self._get_credential_name(cluster_uuid)) |
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|
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cloud_creds = await libjuju.get_cloud_credentials(cloud) |
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|
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await libjuju.remove_cloud(cluster_uuid) |
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|
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credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
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|
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kubectl = self._get_kubectl(credentials) |
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|
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delete_functions = [ |
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kubectl.delete_cluster_role_binding, |
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kubectl.delete_service_account, |
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kubectl.delete_cluster_role, |
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] |
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|
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credential_attrs = cloud_creds[0].result["attrs"] |
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if RBAC_LABEL_KEY_NAME in credential_attrs: |
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rbac_id = credential_attrs[RBAC_LABEL_KEY_NAME] |
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metadata_name = "{}-{}".format(RBAC_STACK_PREFIX, rbac_id) |
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for delete_func in delete_functions: |
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try: |
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delete_func(metadata_name) |
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except Exception as e: |
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self.log.warning("Cannot remove resource in K8s {}".format(e)) |
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|
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except Exception as e: |
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self.log.debug("Caught exception during reset: {}".format(e)) |
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raise e |
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return True |
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|
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"""Deployment""" |
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|
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async def install( |
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self, |
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cluster_uuid: str, |
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kdu_model: str, |
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kdu_instance: str, |
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atomic: bool = True, |
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timeout: float = 1800, |
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params: dict = None, |
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db_dict: dict = None, |
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kdu_name: str = None, |
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namespace: str = None, |
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**kwargs, |
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) -> bool: |
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"""Install a bundle |
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|
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:param cluster_uuid str: The UUID of the cluster to install to |
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:param kdu_model str: The name or path of a bundle to install |
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:param kdu_instance: Kdu instance name |
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:param atomic bool: If set, waits until the model is active and resets |
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the cluster on failure. |
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:param timeout int: The time, in seconds, to wait for the install |
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to finish |
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:param params dict: Key-value pairs of instantiation parameters |
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:param kdu_name: Name of the KDU instance to be installed |
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:param namespace: K8s namespace to use for the KDU instance |
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:param kwargs: Additional parameters |
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vca_id (str): VCA ID |
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|
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:return: If successful, returns ? |
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""" |
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libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
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bundle = kdu_model |
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|
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if not db_dict: |
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raise K8sException("db_dict must be set") |
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if not bundle: |
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raise K8sException("bundle must be set") |
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|
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if bundle.startswith("cs:"): |
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# For Juju Bundles provided by the Charm Store |
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pass |
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elif bundle.startswith("ch:"): |
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# For Juju Bundles provided by the Charm Hub (this only works for juju version >= 2.9) |
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pass |
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elif bundle.startswith("http"): |
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# Download the file |
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pass |
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else: |
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new_workdir = kdu_model.strip(kdu_model.split("/")[-1]) |
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os.chdir(new_workdir) |
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bundle = "local:{}".format(kdu_model) |
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|
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# default namespace to kdu_instance |
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if not namespace: |
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namespace = kdu_instance |
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|
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self.log.debug("Checking for model named {}".format(namespace)) |
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|
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# Create the new model |
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self.log.debug("Adding model: {}".format(namespace)) |
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cloud = Cloud(cluster_uuid, self._get_credential_name(cluster_uuid)) |
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await libjuju.add_model(namespace, cloud) |
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|
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# if model: |
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# TODO: Instantiation parameters |
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|
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""" |
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"Juju bundle that models the KDU, in any of the following ways: |
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- <juju-repo>/<juju-bundle> |
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- <juju-bundle folder under k8s_models folder in the package> |
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- <juju-bundle tgz file (w/ or w/o extension) under k8s_models folder |
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in the package> |
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- <URL_where_to_fetch_juju_bundle> |
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""" |
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try: |
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previous_workdir = os.getcwd() |
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except FileNotFoundError: |
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previous_workdir = "/app/storage" |
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|
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self.log.debug("[install] deploying {}".format(bundle)) |
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await libjuju.deploy(bundle, model_name=namespace, wait=atomic, timeout=timeout) |
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os.chdir(previous_workdir) |
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|
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# update information in the database (first, the VCA status, and then, the namespace) |
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1 |
if self.on_update_db: |
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await self.on_update_db( |
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cluster_uuid, |
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kdu_instance, |
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filter=db_dict["filter"], |
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vca_id=kwargs.get("vca_id"), |
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) |
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|
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self.db.set_one( |
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table="nsrs", |
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q_filter={"_admin.deployed.K8s.kdu-instance": kdu_instance}, |
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update_dict={"_admin.deployed.K8s.$.namespace": namespace}, |
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) |
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|
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1 |
return True |
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|
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async def scale( |
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self, |
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|
kdu_instance: str, |
| 381 |
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scale: int, |
| 382 |
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resource_name: str, |
| 383 |
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total_timeout: float = 1800, |
| 384 |
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namespace: str = None, |
| 385 |
|
**kwargs, |
| 386 |
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) -> bool: |
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"""Scale an application in a model |
| 388 |
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|
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|
:param: kdu_instance str: KDU instance name |
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|
:param: scale int: Scale to which to set the application |
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:param: resource_name str: The application name in the Juju Bundle |
| 392 |
|
:param: timeout float: The time, in seconds, to wait for the install |
| 393 |
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to finish |
| 394 |
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:param namespace str: The namespace (model) where the Bundle was deployed |
| 395 |
|
:param kwargs: Additional parameters |
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vca_id (str): VCA ID |
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|
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:return: If successful, returns True |
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""" |
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|
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model_name = self._obtain_namespace( |
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kdu_instance=kdu_instance, namespace=namespace |
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) |
| 404 |
1 |
try: |
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libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
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await libjuju.scale_application( |
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model_name=model_name, |
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application_name=resource_name, |
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scale=scale, |
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total_timeout=total_timeout, |
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) |
| 412 |
1 |
except Exception as e: |
| 413 |
1 |
error_msg = "Error scaling application {} of the model {} of the kdu instance {}: {}".format( |
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resource_name, model_name, kdu_instance, e |
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) |
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self.log.error(error_msg) |
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raise K8sException(message=error_msg) |
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return True |
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|
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1 |
async def get_scale_count( |
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self, |
| 422 |
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resource_name: str, |
| 423 |
|
kdu_instance: str, |
| 424 |
|
namespace: str = None, |
| 425 |
|
**kwargs, |
| 426 |
|
) -> int: |
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|
"""Get an application scale count |
| 428 |
|
|
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|
:param: resource_name str: The application name in the Juju Bundle |
| 430 |
|
:param: kdu_instance str: KDU instance name |
| 431 |
|
:param namespace str: The namespace (model) where the Bundle was deployed |
| 432 |
|
:param kwargs: Additional parameters |
| 433 |
|
vca_id (str): VCA ID |
| 434 |
|
:return: Return application instance count |
| 435 |
|
""" |
| 436 |
|
|
| 437 |
1 |
model_name = self._obtain_namespace( |
| 438 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 439 |
|
) |
| 440 |
1 |
try: |
| 441 |
1 |
libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| 442 |
1 |
status = await libjuju.get_model_status(model_name=model_name) |
| 443 |
1 |
return len(status.applications[resource_name].units) |
| 444 |
0 |
except Exception as e: |
| 445 |
0 |
error_msg = ( |
| 446 |
|
f"Error getting scale count from application {resource_name} of the model {model_name} of " |
| 447 |
|
f"the kdu instance {kdu_instance}: {e}" |
| 448 |
|
) |
| 449 |
0 |
self.log.error(error_msg) |
| 450 |
0 |
raise K8sException(message=error_msg) |
| 451 |
|
|
| 452 |
1 |
async def instances_list(self, cluster_uuid: str) -> list: |
| 453 |
|
""" |
| 454 |
|
returns a list of deployed releases in a cluster |
| 455 |
|
|
| 456 |
|
:param cluster_uuid: the cluster |
| 457 |
|
:return: |
| 458 |
|
""" |
| 459 |
1 |
return [] |
| 460 |
|
|
| 461 |
1 |
async def upgrade( |
| 462 |
|
self, |
| 463 |
|
cluster_uuid: str, |
| 464 |
|
kdu_instance: str, |
| 465 |
|
kdu_model: str = None, |
| 466 |
|
params: dict = None, |
| 467 |
|
) -> str: |
| 468 |
|
"""Upgrade a model |
| 469 |
|
|
| 470 |
|
:param cluster_uuid str: The UUID of the cluster to upgrade |
| 471 |
|
:param kdu_instance str: The unique name of the KDU instance |
| 472 |
|
:param kdu_model str: The name or path of the bundle to upgrade to |
| 473 |
|
:param params dict: Key-value pairs of instantiation parameters |
| 474 |
|
|
| 475 |
|
:return: If successful, reference to the new revision number of the |
| 476 |
|
KDU instance. |
| 477 |
|
""" |
| 478 |
|
|
| 479 |
|
# TODO: Loop through the bundle and upgrade each charm individually |
| 480 |
|
|
| 481 |
|
""" |
| 482 |
|
The API doesn't have a concept of bundle upgrades, because there are |
| 483 |
|
many possible changes: charm revision, disk, number of units, etc. |
| 484 |
|
|
| 485 |
|
As such, we are only supporting a limited subset of upgrades. We'll |
| 486 |
|
upgrade the charm revision but leave storage and scale untouched. |
| 487 |
|
|
| 488 |
|
Scale changes should happen through OSM constructs, and changes to |
| 489 |
|
storage would require a redeployment of the service, at least in this |
| 490 |
|
initial release. |
| 491 |
|
""" |
| 492 |
1 |
raise MethodNotImplemented() |
| 493 |
|
|
| 494 |
|
"""Rollback""" |
| 495 |
|
|
| 496 |
1 |
async def rollback( |
| 497 |
|
self, |
| 498 |
|
cluster_uuid: str, |
| 499 |
|
kdu_instance: str, |
| 500 |
|
revision: int = 0, |
| 501 |
|
) -> str: |
| 502 |
|
"""Rollback a model |
| 503 |
|
|
| 504 |
|
:param cluster_uuid str: The UUID of the cluster to rollback |
| 505 |
|
:param kdu_instance str: The unique name of the KDU instance |
| 506 |
|
:param revision int: The revision to revert to. If omitted, rolls back |
| 507 |
|
the previous upgrade. |
| 508 |
|
|
| 509 |
|
:return: If successful, returns the revision of active KDU instance, |
| 510 |
|
or raises an exception |
| 511 |
|
""" |
| 512 |
1 |
raise MethodNotImplemented() |
| 513 |
|
|
| 514 |
|
"""Deletion""" |
| 515 |
|
|
| 516 |
1 |
async def uninstall( |
| 517 |
|
self, |
| 518 |
|
cluster_uuid: str, |
| 519 |
|
kdu_instance: str, |
| 520 |
|
namespace: str = None, |
| 521 |
|
**kwargs, |
| 522 |
|
) -> bool: |
| 523 |
|
"""Uninstall a KDU instance |
| 524 |
|
|
| 525 |
|
:param cluster_uuid str: The UUID of the cluster |
| 526 |
|
:param kdu_instance str: The unique name of the KDU instance |
| 527 |
|
:param namespace str: The namespace (model) where the Bundle was deployed |
| 528 |
|
:param kwargs: Additional parameters |
| 529 |
|
vca_id (str): VCA ID |
| 530 |
|
|
| 531 |
|
:return: Returns True if successful, or raises an exception |
| 532 |
|
""" |
| 533 |
1 |
model_name = self._obtain_namespace( |
| 534 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 535 |
|
) |
| 536 |
|
|
| 537 |
1 |
self.log.debug(f"[uninstall] Destroying model: {model_name}") |
| 538 |
|
|
| 539 |
1 |
will_not_delete = False |
| 540 |
1 |
if model_name not in self.uninstall_locks: |
| 541 |
1 |
self.uninstall_locks[model_name] = asyncio.Lock(loop=self.loop) |
| 542 |
1 |
delete_lock = self.uninstall_locks[model_name] |
| 543 |
|
|
| 544 |
1 |
while delete_lock.locked(): |
| 545 |
0 |
will_not_delete = True |
| 546 |
0 |
await asyncio.sleep(0.1) |
| 547 |
|
|
| 548 |
1 |
if will_not_delete: |
| 549 |
0 |
self.log.info("Model {} deleted by another worker.".format(model_name)) |
| 550 |
0 |
return True |
| 551 |
|
|
| 552 |
1 |
try: |
| 553 |
1 |
async with delete_lock: |
| 554 |
1 |
libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| 555 |
|
|
| 556 |
1 |
await libjuju.destroy_model(model_name, total_timeout=3600) |
| 557 |
|
finally: |
| 558 |
1 |
self.uninstall_locks.pop(model_name) |
| 559 |
|
|
| 560 |
1 |
self.log.debug(f"[uninstall] Model {model_name} destroyed") |
| 561 |
1 |
return True |
| 562 |
|
|
| 563 |
1 |
async def upgrade_charm( |
| 564 |
|
self, |
| 565 |
|
ee_id: str = None, |
| 566 |
|
path: str = None, |
| 567 |
|
charm_id: str = None, |
| 568 |
|
charm_type: str = None, |
| 569 |
|
timeout: float = None, |
| 570 |
|
) -> str: |
| 571 |
|
"""This method upgrade charms in VNFs |
| 572 |
|
|
| 573 |
|
Args: |
| 574 |
|
ee_id: Execution environment id |
| 575 |
|
path: Local path to the charm |
| 576 |
|
charm_id: charm-id |
| 577 |
|
charm_type: Charm type can be lxc-proxy-charm, native-charm or k8s-proxy-charm |
| 578 |
|
timeout: (Float) Timeout for the ns update operation |
| 579 |
|
|
| 580 |
|
Returns: |
| 581 |
|
The output of the update operation if status equals to "completed" |
| 582 |
|
""" |
| 583 |
0 |
raise K8sException( |
| 584 |
|
"KDUs deployed with Juju Bundle do not support charm upgrade" |
| 585 |
|
) |
| 586 |
|
|
| 587 |
1 |
async def exec_primitive( |
| 588 |
|
self, |
| 589 |
|
cluster_uuid: str = None, |
| 590 |
|
kdu_instance: str = None, |
| 591 |
|
primitive_name: str = None, |
| 592 |
|
timeout: float = 300, |
| 593 |
|
params: dict = None, |
| 594 |
|
db_dict: dict = None, |
| 595 |
|
namespace: str = None, |
| 596 |
|
**kwargs, |
| 597 |
|
) -> str: |
| 598 |
|
"""Exec primitive (Juju action) |
| 599 |
|
|
| 600 |
|
:param cluster_uuid str: The UUID of the cluster |
| 601 |
|
:param kdu_instance str: The unique name of the KDU instance |
| 602 |
|
:param primitive_name: Name of action that will be executed |
| 603 |
|
:param timeout: Timeout for action execution |
| 604 |
|
:param params: Dictionary of all the parameters needed for the action |
| 605 |
|
:param db_dict: Dictionary for any additional data |
| 606 |
|
:param namespace str: The namespace (model) where the Bundle was deployed |
| 607 |
|
:param kwargs: Additional parameters |
| 608 |
|
vca_id (str): VCA ID |
| 609 |
|
|
| 610 |
|
:return: Returns the output of the action |
| 611 |
|
""" |
| 612 |
1 |
libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| 613 |
|
|
| 614 |
1 |
namespace = self._obtain_namespace( |
| 615 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 616 |
|
) |
| 617 |
|
|
| 618 |
1 |
if not params or "application-name" not in params: |
| 619 |
1 |
raise K8sException( |
| 620 |
|
"Missing application-name argument, \ |
| 621 |
|
argument needed for K8s actions" |
| 622 |
|
) |
| 623 |
1 |
try: |
| 624 |
1 |
self.log.debug( |
| 625 |
|
"[exec_primitive] Getting model " |
| 626 |
|
"{} for the kdu_instance: {}".format(namespace, kdu_instance) |
| 627 |
|
) |
| 628 |
1 |
application_name = params["application-name"] |
| 629 |
1 |
actions = await libjuju.get_actions( |
| 630 |
|
application_name=application_name, model_name=namespace |
| 631 |
|
) |
| 632 |
1 |
if primitive_name not in actions: |
| 633 |
1 |
raise K8sException("Primitive {} not found".format(primitive_name)) |
| 634 |
1 |
output, status = await libjuju.execute_action( |
| 635 |
|
application_name=application_name, |
| 636 |
|
model_name=namespace, |
| 637 |
|
action_name=primitive_name, |
| 638 |
|
**params, |
| 639 |
|
) |
| 640 |
|
|
| 641 |
1 |
if status != "completed": |
| 642 |
1 |
raise K8sException( |
| 643 |
|
"status is not completed: {} output: {}".format(status, output) |
| 644 |
|
) |
| 645 |
1 |
if self.on_update_db: |
| 646 |
0 |
await self.on_update_db( |
| 647 |
|
cluster_uuid=cluster_uuid, |
| 648 |
|
kdu_instance=kdu_instance, |
| 649 |
|
filter=db_dict["filter"], |
| 650 |
|
) |
| 651 |
|
|
| 652 |
1 |
return output |
| 653 |
|
|
| 654 |
1 |
except Exception as e: |
| 655 |
1 |
error_msg = "Error executing primitive {}: {}".format(primitive_name, e) |
| 656 |
1 |
self.log.error(error_msg) |
| 657 |
1 |
raise K8sException(message=error_msg) |
| 658 |
|
|
| 659 |
|
"""Introspection""" |
| 660 |
|
|
| 661 |
1 |
async def inspect_kdu( |
| 662 |
|
self, |
| 663 |
|
kdu_model: str, |
| 664 |
|
) -> dict: |
| 665 |
|
"""Inspect a KDU |
| 666 |
|
|
| 667 |
|
Inspects a bundle and returns a dictionary of config parameters and |
| 668 |
|
their default values. |
| 669 |
|
|
| 670 |
|
:param kdu_model str: The name or path of the bundle to inspect. |
| 671 |
|
|
| 672 |
|
:return: If successful, returns a dictionary of available parameters |
| 673 |
|
and their default values. |
| 674 |
|
""" |
| 675 |
|
|
| 676 |
1 |
kdu = {} |
| 677 |
1 |
if not os.path.exists(kdu_model): |
| 678 |
1 |
raise K8sException("file {} not found".format(kdu_model)) |
| 679 |
|
|
| 680 |
1 |
with open(kdu_model, "r") as f: |
| 681 |
1 |
bundle = yaml.safe_load(f.read()) |
| 682 |
|
|
| 683 |
|
""" |
| 684 |
|
{ |
| 685 |
|
'description': 'Test bundle', |
| 686 |
|
'bundle': 'kubernetes', |
| 687 |
|
'applications': { |
| 688 |
|
'mariadb-k8s': { |
| 689 |
|
'charm': 'cs:~charmed-osm/mariadb-k8s-20', |
| 690 |
|
'scale': 1, |
| 691 |
|
'options': { |
| 692 |
|
'password': 'manopw', |
| 693 |
|
'root_password': 'osm4u', |
| 694 |
|
'user': 'mano' |
| 695 |
|
}, |
| 696 |
|
'series': 'kubernetes' |
| 697 |
|
} |
| 698 |
|
} |
| 699 |
|
} |
| 700 |
|
""" |
| 701 |
|
# TODO: This should be returned in an agreed-upon format |
| 702 |
1 |
kdu = bundle["applications"] |
| 703 |
|
|
| 704 |
1 |
return kdu |
| 705 |
|
|
| 706 |
1 |
async def help_kdu( |
| 707 |
|
self, |
| 708 |
|
kdu_model: str, |
| 709 |
|
) -> str: |
| 710 |
|
"""View the README |
| 711 |
|
|
| 712 |
|
If available, returns the README of the bundle. |
| 713 |
|
|
| 714 |
|
:param kdu_model str: The name or path of a bundle |
| 715 |
|
f |
| 716 |
|
:return: If found, returns the contents of the README. |
| 717 |
|
""" |
| 718 |
1 |
readme = None |
| 719 |
|
|
| 720 |
1 |
files = ["README", "README.txt", "README.md"] |
| 721 |
1 |
path = os.path.dirname(kdu_model) |
| 722 |
1 |
for file in os.listdir(path): |
| 723 |
1 |
if file in files: |
| 724 |
1 |
with open(file, "r") as f: |
| 725 |
1 |
readme = f.read() |
| 726 |
1 |
break |
| 727 |
|
|
| 728 |
1 |
return readme |
| 729 |
|
|
| 730 |
1 |
async def status_kdu( |
| 731 |
|
self, |
| 732 |
|
cluster_uuid: str, |
| 733 |
|
kdu_instance: str, |
| 734 |
|
complete_status: bool = False, |
| 735 |
|
yaml_format: bool = False, |
| 736 |
|
namespace: str = None, |
| 737 |
|
**kwargs, |
| 738 |
|
) -> Union[str, dict]: |
| 739 |
|
"""Get the status of the KDU |
| 740 |
|
|
| 741 |
|
Get the current status of the KDU instance. |
| 742 |
|
|
| 743 |
|
:param cluster_uuid str: The UUID of the cluster |
| 744 |
|
:param kdu_instance str: The unique id of the KDU instance |
| 745 |
|
:param complete_status: To get the complete_status of the KDU |
| 746 |
|
:param yaml_format: To get the status in proper format for NSR record |
| 747 |
|
:param namespace str: The namespace (model) where the Bundle was deployed |
| 748 |
|
:param: kwargs: Additional parameters |
| 749 |
|
vca_id (str): VCA ID |
| 750 |
|
|
| 751 |
|
:return: Returns a dictionary containing namespace, state, resources, |
| 752 |
|
and deployment_time and returns complete_status if complete_status is True |
| 753 |
|
""" |
| 754 |
1 |
libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| 755 |
1 |
status = {} |
| 756 |
|
|
| 757 |
1 |
model_name = self._obtain_namespace( |
| 758 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 759 |
|
) |
| 760 |
1 |
model_status = await libjuju.get_model_status(model_name=model_name) |
| 761 |
|
|
| 762 |
1 |
if not complete_status: |
| 763 |
1 |
for name in model_status.applications: |
| 764 |
1 |
application = model_status.applications[name] |
| 765 |
1 |
status[name] = {"status": application["status"]["status"]} |
| 766 |
|
else: |
| 767 |
0 |
if yaml_format: |
| 768 |
0 |
return obj_to_yaml(model_status) |
| 769 |
|
else: |
| 770 |
0 |
return obj_to_dict(model_status) |
| 771 |
|
|
| 772 |
1 |
return status |
| 773 |
|
|
| 774 |
1 |
async def add_relation( |
| 775 |
|
self, |
| 776 |
|
provider: RelationEndpoint, |
| 777 |
|
requirer: RelationEndpoint, |
| 778 |
|
): |
| 779 |
|
""" |
| 780 |
|
Add relation between two charmed endpoints |
| 781 |
|
|
| 782 |
|
:param: provider: Provider relation endpoint |
| 783 |
|
:param: requirer: Requirer relation endpoint |
| 784 |
|
""" |
| 785 |
1 |
self.log.debug(f"adding new relation between {provider} and {requirer}") |
| 786 |
1 |
cross_model_relation = ( |
| 787 |
|
provider.model_name != requirer.model_name |
| 788 |
|
or requirer.vca_id != requirer.vca_id |
| 789 |
|
) |
| 790 |
1 |
try: |
| 791 |
1 |
if cross_model_relation: |
| 792 |
|
# Cross-model relation |
| 793 |
1 |
provider_libjuju = await self._get_libjuju(provider.vca_id) |
| 794 |
1 |
requirer_libjuju = await self._get_libjuju(requirer.vca_id) |
| 795 |
1 |
offer = await provider_libjuju.offer(provider) |
| 796 |
1 |
if offer: |
| 797 |
1 |
saas_name = await requirer_libjuju.consume( |
| 798 |
|
requirer.model_name, offer, provider_libjuju |
| 799 |
|
) |
| 800 |
1 |
await requirer_libjuju.add_relation( |
| 801 |
|
requirer.model_name, |
| 802 |
|
requirer.endpoint, |
| 803 |
|
saas_name, |
| 804 |
|
) |
| 805 |
|
else: |
| 806 |
|
# Standard relation |
| 807 |
1 |
vca_id = provider.vca_id |
| 808 |
1 |
model = provider.model_name |
| 809 |
1 |
libjuju = await self._get_libjuju(vca_id) |
| 810 |
|
# add juju relations between two applications |
| 811 |
1 |
await libjuju.add_relation( |
| 812 |
|
model_name=model, |
| 813 |
|
endpoint_1=provider.endpoint, |
| 814 |
|
endpoint_2=requirer.endpoint, |
| 815 |
|
) |
| 816 |
1 |
except Exception as e: |
| 817 |
1 |
message = f"Error adding relation between {provider} and {requirer}: {e}" |
| 818 |
1 |
self.log.error(message) |
| 819 |
1 |
raise Exception(message=message) |
| 820 |
|
|
| 821 |
1 |
async def update_vca_status( |
| 822 |
|
self, vcastatus: dict, kdu_instance: str, namespace: str = None, **kwargs |
| 823 |
|
): |
| 824 |
|
""" |
| 825 |
|
Add all configs, actions, executed actions of all applications in a model to vcastatus dict |
| 826 |
|
|
| 827 |
|
:param vcastatus dict: dict containing vcastatus |
| 828 |
|
:param kdu_instance str: The unique id of the KDU instance |
| 829 |
|
:param namespace str: The namespace (model) where the Bundle was deployed |
| 830 |
|
:param: kwargs: Additional parameters |
| 831 |
|
vca_id (str): VCA ID |
| 832 |
|
|
| 833 |
|
:return: None |
| 834 |
|
""" |
| 835 |
|
|
| 836 |
1 |
model_name = self._obtain_namespace( |
| 837 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 838 |
|
) |
| 839 |
|
|
| 840 |
1 |
libjuju = await self._get_libjuju(kwargs.get("vca_id")) |
| 841 |
1 |
try: |
| 842 |
1 |
for vca_model_name in vcastatus: |
| 843 |
|
# Adding executed actions |
| 844 |
1 |
vcastatus[vca_model_name][ |
| 845 |
|
"executedActions" |
| 846 |
|
] = await libjuju.get_executed_actions(model_name=model_name) |
| 847 |
|
|
| 848 |
1 |
for application in vcastatus[vca_model_name]["applications"]: |
| 849 |
|
# Adding application actions |
| 850 |
1 |
vcastatus[vca_model_name]["applications"][application][ |
| 851 |
|
"actions" |
| 852 |
|
] = {} |
| 853 |
|
# Adding application configs |
| 854 |
1 |
vcastatus[vca_model_name]["applications"][application][ |
| 855 |
|
"configs" |
| 856 |
|
] = await libjuju.get_application_configs( |
| 857 |
|
model_name=model_name, application_name=application |
| 858 |
|
) |
| 859 |
|
|
| 860 |
1 |
except Exception as e: |
| 861 |
1 |
self.log.debug("Error in updating vca status: {}".format(str(e))) |
| 862 |
|
|
| 863 |
1 |
async def get_services( |
| 864 |
|
self, cluster_uuid: str, kdu_instance: str, namespace: str |
| 865 |
|
) -> list: |
| 866 |
|
"""Return a list of services of a kdu_instance""" |
| 867 |
|
|
| 868 |
1 |
namespace = self._obtain_namespace( |
| 869 |
|
kdu_instance=kdu_instance, namespace=namespace |
| 870 |
|
) |
| 871 |
|
|
| 872 |
1 |
credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
| 873 |
1 |
kubectl = self._get_kubectl(credentials) |
| 874 |
1 |
return kubectl.get_services( |
| 875 |
|
field_selector="metadata.namespace={}".format(namespace) |
| 876 |
|
) |
| 877 |
|
|
| 878 |
1 |
async def get_service( |
| 879 |
|
self, cluster_uuid: str, service_name: str, namespace: str |
| 880 |
|
) -> object: |
| 881 |
|
"""Return data for a specific service inside a namespace""" |
| 882 |
|
|
| 883 |
1 |
credentials = self.get_credentials(cluster_uuid=cluster_uuid) |
| 884 |
1 |
kubectl = self._get_kubectl(credentials) |
| 885 |
1 |
return kubectl.get_services( |
| 886 |
|
field_selector="metadata.name={},metadata.namespace={}".format( |
| 887 |
|
service_name, namespace |
| 888 |
|
) |
| 889 |
|
)[0] |
| 890 |
|
|
| 891 |
1 |
def get_credentials(self, cluster_uuid: str) -> str: |
| 892 |
|
""" |
| 893 |
|
Get Cluster Kubeconfig |
| 894 |
|
""" |
| 895 |
1 |
k8scluster = self.db.get_one( |
| 896 |
|
"k8sclusters", q_filter={"_id": cluster_uuid}, fail_on_empty=False |
| 897 |
|
) |
| 898 |
|
|
| 899 |
1 |
self.db.encrypt_decrypt_fields( |
| 900 |
|
k8scluster.get("credentials"), |
| 901 |
|
"decrypt", |
| 902 |
|
["password", "secret"], |
| 903 |
|
schema_version=k8scluster["schema_version"], |
| 904 |
|
salt=k8scluster["_id"], |
| 905 |
|
) |
| 906 |
|
|
| 907 |
1 |
return yaml.safe_dump(k8scluster.get("credentials")) |
| 908 |
|
|
| 909 |
1 |
def _get_credential_name(self, cluster_uuid: str) -> str: |
| 910 |
|
""" |
| 911 |
|
Get credential name for a k8s cloud |
| 912 |
|
|
| 913 |
|
We cannot use the cluster_uuid for the credential name directly, |
| 914 |
|
because it cannot start with a number, it must start with a letter. |
| 915 |
|
Therefore, the k8s cloud credential name will be "cred-" followed |
| 916 |
|
by the cluster uuid. |
| 917 |
|
|
| 918 |
|
:param: cluster_uuid: Cluster UUID of the kubernetes cloud (=cloud_name) |
| 919 |
|
|
| 920 |
|
:return: Name to use for the credential name. |
| 921 |
|
""" |
| 922 |
1 |
return "cred-{}".format(cluster_uuid) |
| 923 |
|
|
| 924 |
1 |
def get_namespace( |
| 925 |
|
self, |
| 926 |
|
cluster_uuid: str, |
| 927 |
|
) -> str: |
| 928 |
|
"""Get the namespace UUID |
| 929 |
|
Gets the namespace's unique name |
| 930 |
|
|
| 931 |
|
:param cluster_uuid str: The UUID of the cluster |
| 932 |
|
:returns: The namespace UUID, or raises an exception |
| 933 |
|
""" |
| 934 |
1 |
pass |
| 935 |
|
|
| 936 |
1 |
@staticmethod |
| 937 |
1 |
def generate_kdu_instance_name(**kwargs): |
| 938 |
0 |
db_dict = kwargs.get("db_dict") |
| 939 |
0 |
kdu_name = kwargs.get("kdu_name", None) |
| 940 |
0 |
if kdu_name: |
| 941 |
0 |
kdu_instance = "{}-{}".format(kdu_name, db_dict["filter"]["_id"]) |
| 942 |
|
else: |
| 943 |
0 |
kdu_instance = db_dict["filter"]["_id"] |
| 944 |
0 |
return kdu_instance |
| 945 |
|
|
| 946 |
1 |
async def _get_libjuju(self, vca_id: str = None) -> Libjuju: |
| 947 |
|
""" |
| 948 |
|
Get libjuju object |
| 949 |
|
|
| 950 |
|
:param: vca_id: VCA ID |
| 951 |
|
If None, get a libjuju object with a Connection to the default VCA |
| 952 |
|
Else, geta libjuju object with a Connection to the specified VCA |
| 953 |
|
""" |
| 954 |
1 |
if not vca_id: |
| 955 |
1 |
while self.loading_libjuju.locked(): |
| 956 |
0 |
await asyncio.sleep(0.1) |
| 957 |
1 |
if not self.libjuju: |
| 958 |
0 |
async with self.loading_libjuju: |
| 959 |
0 |
vca_connection = await get_connection(self._store) |
| 960 |
0 |
self.libjuju = Libjuju(vca_connection, loop=self.loop, log=self.log) |
| 961 |
1 |
return self.libjuju |
| 962 |
|
else: |
| 963 |
0 |
vca_connection = await get_connection(self._store, vca_id) |
| 964 |
0 |
return Libjuju( |
| 965 |
|
vca_connection, |
| 966 |
|
loop=self.loop, |
| 967 |
|
log=self.log, |
| 968 |
|
n2vc=self, |
| 969 |
|
) |
| 970 |
|
|
| 971 |
1 |
def _get_kubectl(self, credentials: str) -> Kubectl: |
| 972 |
|
""" |
| 973 |
|
Get Kubectl object |
| 974 |
|
|
| 975 |
|
:param: kubeconfig_credentials: Kubeconfig credentials |
| 976 |
|
""" |
| 977 |
0 |
kubecfg = tempfile.NamedTemporaryFile() |
| 978 |
0 |
with open(kubecfg.name, "w") as kubecfg_file: |
| 979 |
0 |
kubecfg_file.write(credentials) |
| 980 |
0 |
return Kubectl(config_file=kubecfg.name) |
| 981 |
|
|
| 982 |
1 |
def _obtain_namespace(self, kdu_instance: str, namespace: str = None) -> str: |
| 983 |
|
""" |
| 984 |
|
Obtain the namespace/model name to use in the instantiation of a Juju Bundle in K8s. The default namespace is |
| 985 |
|
the kdu_instance name. However, if the user passes the namespace where he wants to deploy the bundle, |
| 986 |
|
that namespace will be used. |
| 987 |
|
|
| 988 |
|
:param kdu_instance: the default KDU instance name |
| 989 |
|
:param namespace: the namespace passed by the User |
| 990 |
|
""" |
| 991 |
|
|
| 992 |
|
# deault the namespace/model name to the kdu_instance name TODO -> this should be the real return... But |
| 993 |
|
# once the namespace is not passed in most methods, I had to do this in another way. But I think this should |
| 994 |
|
# be the procedure in the future return namespace if namespace else kdu_instance |
| 995 |
|
|
| 996 |
|
# TODO -> has referred above, this should be avoided in the future, this is temporary, in order to avoid |
| 997 |
|
# compatibility issues |
| 998 |
1 |
return ( |
| 999 |
|
namespace |
| 1000 |
|
if namespace |
| 1001 |
|
else self._obtain_namespace_from_db(kdu_instance=kdu_instance) |
| 1002 |
|
) |
| 1003 |
|
|
| 1004 |
1 |
def _obtain_namespace_from_db(self, kdu_instance: str) -> str: |
| 1005 |
0 |
db_nsrs = self.db.get_one( |
| 1006 |
|
table="nsrs", q_filter={"_admin.deployed.K8s.kdu-instance": kdu_instance} |
| 1007 |
|
) |
| 1008 |
0 |
for k8s in db_nsrs["_admin"]["deployed"]["K8s"]: |
| 1009 |
0 |
if k8s.get("kdu-instance") == kdu_instance: |
| 1010 |
0 |
return k8s.get("namespace") |
| 1011 |
0 |
return "" |
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