2 # Copyright 2019 Telefonica Investigacion y Desarrollo, S.A.U.
3 # This file is part of OSM
6 # Licensed under the Apache License, Version 2.0 (the "License");
7 # you may not use this file except in compliance with the License.
8 # You may obtain a copy of the License at
10 # http://www.apache.org/licenses/LICENSE-2.0
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
16 # See the License for the specific language governing permissions and
17 # limitations under the License.
19 # For those usages not covered by the Apache License, Version 2.0 please
20 # contact with: nfvlabs@tid.es
24 from n2vc
.loggable
import Loggable
29 class K8sConnector(abc
.ABC
, Loggable
):
32 ##################################################################################################
33 ########################################## P U B L I C ###########################################
34 ##################################################################################################
45 :param db: database object to write current operation status
46 :param log: logger for tracing
47 :param on_update_db: callback called when k8s connector updates database
51 Loggable
.__init
__(self
, log
=log
, log_to_console
=True, prefix
='\nK8S')
53 self
.info('Initializing generic K8S connector')
55 # the database and update callback
57 self
.on_update_db
= on_update_db
59 self
.info('K8S generic connector initialized')
65 namespace
: str = 'kube-system',
66 reuse_cluster_uuid
=None
69 It prepares a given K8s cluster environment to run Charts or juju Bundles on both sides:
73 :param k8s_creds: credentials to access a given K8s cluster, i.e. a valid '.kube/config'
74 :param namespace: optional namespace to be used for the K8s engine (helm tiller, juju).
75 By default, 'kube-system' will be used
76 :param reuse_cluster_uuid: existing cluster uuid for reuse
77 :return: uuid of the K8s cluster and True if connector has installed some software in the cluster
78 (on error, an exception will be raised)
87 repo_type
: str = 'chart'
90 Add a new repository to OSM database
92 :param cluster_uuid: the cluster
93 :param name: name for the repo in OSM
94 :param url: URL of the repo
95 :param repo_type: either "chart" or "bundle"
96 :return: True if successful
105 Get the list of registered repositories
107 :param cluster_uuid: the cluster
108 :return: list of registered repositories: [ (name, url) .... ]
112 async def repo_remove(
118 Remove a repository from OSM
120 :param name: repo name in OSM
121 :param cluster_uuid: the cluster
122 :return: True if successful
130 uninstall_sw
: bool = False
133 Uninstalls Tiller/Charm from a known K8s cluster and removes it from the list of known K8s clusters.
134 Intended to be used e.g. when the NS instance is deleted.
136 :param cluster_uuid: UUID of a K8s cluster known by OSM.
137 :param force: force deletion, even in case there are deployed releases
138 :param uninstall_sw: flag to indicate that sw uninstallation from software is needed
139 :return: str: kdu_instance generated by helm
148 timeout
: float = 300,
153 Deploys of a new KDU instance. It would implicitly rely on the `install` call to deploy the Chart/Bundle
154 properly parametrized (in practice, this call would happen before any _initial-config-primitive_
155 of the VNF is called).
157 :param cluster_uuid: UUID of a K8s cluster known by OSM
158 :param kdu_model: chart/bundle:version reference (string), which can be either of these options:
159 - a name of chart/bundle available via the repos known by OSM
160 - a path to a packaged chart/bundle
161 - a path to an unpacked chart/bundle directory or a URL
162 :param atomic: If set, installation process purges chart/bundle on fail, also will wait until
163 all the K8s objects are active
164 :param timeout: Time in seconds to wait for the install of the chart/bundle (defaults to
165 Helm default timeout: 300s)
166 :param params: dictionary of key-value pairs for instantiation parameters (overriding default values)
167 :param dict db_dict: where to write into database when the status changes.
168 It contains a dict with {collection: <str>, filter: {}, path: <str>},
169 e.g. {collection: "nsrs", filter: {_id: <nsd-id>, path: "_admin.deployed.K8S.3"}
170 :return: True if successful
178 kdu_model
: str = None,
180 timeout
: float = 300,
185 Upgrades an existing KDU instance. It would implicitly use the `upgrade` call over an existing Chart/Bundle.
186 It can be used both to upgrade the chart or to reconfigure it. This would be exposed as Day-2 primitive.
188 :param cluster_uuid: UUID of a K8s cluster known by OSM
189 :param kdu_instance: unique name for the KDU instance to be updated
190 :param kdu_model: new chart/bundle:version reference
191 :param atomic: rollback in case of fail and wait for pods and services are available
192 :param timeout: Time in seconds to wait for the install of the chart/bundle (defaults to
193 Helm default timeout: 300s)
194 :param params: new dictionary of key-value pairs for instantiation parameters
195 :param dict db_dict: where to write into database when the status changes.
196 It contains a dict with {collection: <str>, filter: {}, path: <str>},
197 e.g. {collection: "nsrs", filter: {_id: <nsd-id>, path: "_admin.deployed.K8S.3"}
198 :return: reference to the new revision number of the KDU instance
210 Rolls back a previous update of a KDU instance. It would implicitly use the `rollback` call.
211 It can be used both to rollback from a Chart/Bundle version update or from a reconfiguration.
212 This would be exposed as Day-2 primitive.
214 :param cluster_uuid: UUID of a K8s cluster known by OSM
215 :param kdu_instance: unique name for the KDU instance
216 :param revision: revision to which revert changes. If omitted, it will revert the last update only
217 :param dict db_dict: where to write into database when the status changes.
218 It contains a dict with {collection: <str>, filter: {}, path: <str>},
219 e.g. {collection: "nsrs", filter: {_id: <nsd-id>, path: "_admin.deployed.K8S.3"}
220 :return:If successful, reference to the current active revision of the KDU instance after the rollback
230 Removes an existing KDU instance. It would implicitly use the `delete` call (this call would happen
231 after all _terminate-config-primitive_ of the VNF are invoked).
233 :param cluster_uuid: UUID of a K8s cluster known by OSM
234 :param kdu_instance: unique name for the KDU instance to be deleted
235 :return: True if successful
239 async def inspect_kdu(
245 These calls will retrieve from the Chart/Bundle:
247 - The list of configurable values and their defaults (e.g. in Charts, it would retrieve
248 the contents of `values.yaml`).
249 - If available, any embedded help file (e.g. `readme.md`) embedded in the Chart/Bundle.
251 :param kdu_model: chart/bundle reference
252 :param repo_url: optional, reposotory URL (None if tar.gz, URl in other cases, even stable URL)
255 If successful, it will return the available parameters and their default values as provided by the backend.
266 :param kdu_model: chart/bundle reference
267 :param repo_url: optional, reposotory URL (None if tar.gz, URl in other cases, even stable URL)
268 :return: If successful, it will return the contents of the 'readme.md'
272 async def status_kdu(
278 This call would retrieve tha current state of a given KDU instance. It would be would allow to retrieve
279 the _composition_ (i.e. K8s objects) and _specific values_ of the configuration parameters applied
280 to a given instance. This call would be based on the `status` call.
282 :param cluster_uuid: UUID of a K8s cluster known by OSM
283 :param kdu_instance: unique name for the KDU instance
284 :return: If successful, it will return the following vector of arguments:
285 - K8s `namespace` in the cluster where the KDU lives
286 - `state` of the KDU instance. It can be:
293 - List of `resources` (objects) that this release consists of, sorted by kind, and the status of those resources
294 - Last `deployment_time`.
299 ##################################################################################################
300 ########################################## P R I V A T E #########################################
301 ##################################################################################################
304 async def write_app_status_to_db(
308 detailed_status
: str,
313 self
.warning('No db => No database write')
317 self
.warning('No db_dict => No database write')
320 self
.debug('status={}'.format(status
))
324 the_table
= db_dict
['collection']
325 the_filter
= db_dict
['filter']
326 the_path
= db_dict
['path']
327 if not the_path
[-1] == '.':
328 the_path
= the_path
+ '.'
330 the_path
+ 'operation': operation
,
331 the_path
+ 'status': status
,
332 the_path
+ 'detailed-status': detailed_status
,
333 the_path
+ 'status-time': str(time
.time()),
339 update_dict
=update_dict
,
344 if self
.on_update_db
:
345 if asyncio
.iscoroutinefunction(self
.on_update_db
):
346 await self
.on_update_db(the_table
, the_filter
, the_path
, update_dict
)
348 self
.on_update_db(the_table
, the_filter
, the_path
, update_dict
)
352 except Exception as e
:
353 self
.info('Exception writing status to database: {}'.format(e
))