1 # ============LICENSE_START====================================================
3 # =============================================================================
4 # Copyright (c) 2017-2020 AT&T Intellectual Property. All rights reserved.
5 # Copyright (c) 2020 Pantheon.tech. All rights reserved.
6 # =============================================================================
7 # Licensed under the Apache License, Version 2.0 (the "License");
8 # you may not use this file except in compliance with the License.
9 # You may obtain a copy of the License at
11 # http://www.apache.org/licenses/LICENSE-2.0
13 # Unless required by applicable law or agreed to in writing, software
14 # distributed under the License is distributed on an "AS IS" BASIS,
15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 # See the License for the specific language governing permissions and
17 # limitations under the License.
18 # ============LICENSE_END======================================================
20 from cloudify import ctx
21 from cloudify.decorators import operation
22 from cloudify.exceptions import NonRecoverableError
23 from dmaapplugin import DMAAP_API_URL, DMAAP_USER, DMAAP_PASS
24 from dmaapplugin.dmaaputils import random_string
25 from dmaapcontrollerif.dmaap_requests import DMaaPControllerHandle
27 # Set up a subscriber to a source feed
28 def _set_up_subscriber(dmc, source_feed_id, loc, delivery_url, username, userpw):
29 # Add subscriber to source feed
30 add_sub = dmc.add_subscriber(source_feed_id, loc, delivery_url, username, userpw)
31 add_sub.raise_for_status()
34 # Set up a publisher to a target feed
35 def _set_up_publisher(dmc, target_feed_id, loc):
36 username = random_string(8)
37 userpw = random_string(16)
38 add_pub = dmc.add_publisher(target_feed_id, loc, username, userpw)
39 add_pub.raise_for_status()
40 pub_info = add_pub.json()
41 return pub_info["pubId"], username, userpw
43 # Get a central location to use when creating a publisher or subscriber
44 def _get_central_location(dmc):
45 locations = dmc.get_dcae_central_locations()
46 if len(locations) < 1:
47 raise Exception('No central location found for setting up DR bridging')
48 return locations[0] # We take the first one. Typically there will be two central locations
51 # Set up a "bridge" between two feeds internal to DCAE
52 # A source feed "bridges_to" a target feed, meaning that anything published to
53 # the source feed will be delivered to subscribers to the target feed (as well as
54 # to subscribers of the source feed).
56 # The bridge is established by first adding a publisher to the target feed. The result of doing this
57 # is a publish URL and a set of publication credentials.
58 #The publish URL and publication credentials are used to set up a subscriber to the source feed.
59 #I.e., we tell the source feed to deliver to an endpoint which is actually a publish
60 # endpoint for the target feed.
62 def create_dr_bridge(**kwargs):
66 # Get source and target feed ids
67 if 'feed_id' in ctx.target.instance.runtime_properties:
68 target_feed_id = ctx.target.instance.runtime_properties['feed_id']
70 raise Exception('Target feed has no feed_id property')
71 if 'feed_id' in ctx.source.instance.runtime_properties:
72 source_feed_id = ctx.source.instance.runtime_properties['feed_id']
74 raise Exception('Source feed has no feed_id property')
76 dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
78 # Get a location to use when creating a publisher or subscriber--a central location seems reasonable
79 loc = _get_central_location(dmc)
81 ctx.logger.info('Creating bridge from feed {0} to feed {1} using location {2}'.format(source_feed_id, target_feed_id, loc))
83 # Add publisher to target feed
84 publisher_id, username, userpw = _set_up_publisher(dmc, target_feed_id, loc)
85 ctx.logger.info("Added publisher id {0} to target feed {1} with user {2}".format(publisher_id, target_feed_id, username))
87 # Add subscriber to source feed
88 delivery_url = ctx.target.instance.runtime_properties['publish_url']
89 subscriber_info = _set_up_subscriber(dmc, source_feed_id, loc, delivery_url, username, userpw)
90 subscriber_id = subscriber_info["subId"]
91 ctx.logger.info("Added subscriber id {0} to source feed {1} with delivery url {2}".format(subscriber_id, source_feed_id, delivery_url))
93 # Save the publisher and subscriber IDs on the source node, indexed by the target node id
94 ctx.source.instance.runtime_properties[ctx.target.node.id] = {"publisher_id": publisher_id, "subscriber_id": subscriber_id}
96 except Exception as e:
97 ctx.logger.error("Error creating bridge: {0}".format(e))
98 raise NonRecoverableError(e)
100 # Set up a bridge from an internal DCAE feed to a feed in an external Data Router system
101 # The target feed needs to be provisioned in the external Data Router system. A publisher
102 # to that feed must also be set up in the external Data Router system. The publish URL,
103 # username, and password need to be captured in a target node of type dcae.nodes.ExternalTargetFeed.
104 # The bridge is established by setting up a subscriber to the internal DCAE source feed using the
105 # external feed publisher parameters as delivery parameters for the subscriber.
107 def create_external_dr_bridge(**kwargs):
110 # Make sure target feed has full set of properties
111 if 'url' in ctx.target.node.properties and 'username' in ctx.target.node.properties and 'userpw' in ctx.target.node.properties:
112 url = ctx.target.node.properties['url']
113 username = ctx.target.node.properties['username']
114 userpw = ctx.target.node.properties['userpw']
116 raise Exception ("Target feed missing url, username, and/or user pw")
118 # Make sure source feed has a feed ID
119 if 'feed_id' in ctx.source.instance.runtime_properties:
120 source_feed_id = ctx.source.instance.runtime_properties['feed_id']
122 raise Exception('Source feed has no feed_id property')
124 dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
126 # Get a central location to use when creating subscriber
127 loc = _get_central_location(dmc)
129 ctx.logger.info('Creating external bridge from feed {0} to external url {1} using location {2}'.format(source_feed_id, url, loc))
131 # Create subscription to source feed using properties of the external target feed
132 subscriber_info = _set_up_subscriber(dmc, source_feed_id, loc, url, username, userpw)
133 subscriber_id = subscriber_info["subId"]
134 ctx.logger.info("Added subscriber id {0} to source feed {1} with delivery url {2}".format(subscriber_id, source_feed_id, url))
136 # Save the subscriber ID on the source node, indexed by the target node id
137 ctx.source.instance.runtime_properties[ctx.target.node.id] = {"subscriber_id": subscriber_id}
139 except Exception as e:
140 ctx.logger.error("Error creating external bridge: {0}".format(e))
141 raise NonRecoverableError(e)
143 # Set up a bridge from a feed in an external Data Router system to an internal DCAE feed.
144 # The bridge is established by creating a publisher on the internal DCAE feed. Then a subscription
145 # to the external feed is created through manual provisioning in the external Data Router system, using
146 # the publish URL and the publisher username and password for the internal feed as the delivery parameters
147 # for the external subscription.
148 # In order to obtain the publish URL, publisher username, and password, a blueprint using this sort of
149 # bridge will typically have an output that exposes the runtime_property set on the source node in this operation.
151 def create_external_source_dr_bridge(**kwargs):
154 if 'feed_id' in ctx.target.instance.runtime_properties:
155 target_feed_id = ctx.target.instance.runtime_properties['feed_id']
157 raise Exception('Target feed has no feed_id property')
159 dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
161 # Get a central location to use when creating a publisher
162 loc = _get_central_location(dmc)
164 # Create a publisher on the target feed
165 publisher_id, username, userpw = _set_up_publisher(dmc, target_feed_id, loc)
167 # Save the publisher info on the source node, indexed by the target node
168 ctx.source.instance.runtime_properties[ctx.target.node.id] = {"publisher_id": publisher_id, "url": ctx.target.instance.runtime_properties["publish_url"], "username": username, "userpw": userpw}
170 except Exception as e:
171 ctx.logger.error("Error creating external source bridge: {0}".format(e))
173 # Remove the bridge between the relationship source and target.
174 # For a bridge between 2 internal feeds, deletes the subscriber on the source feed and the publisher on the target feed.
175 # For a bridge to an external target feed, deletes the subscriber on the source feed.
176 # For a bridge from an external source feed, deletes the publisher on the target feed.
178 def remove_dr_bridge(**kwargs):
181 dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
183 if ctx.target.node.id in ctx.source.instance.runtime_properties:
185 if 'subscriber_id' in ctx.source.instance.runtime_properties[ctx.target.node.id]:
186 # Delete the subscription for this bridge
187 ctx.logger.info("Removing bridge -- deleting subscriber {0}".format(ctx.source.instance.runtime_properties[ctx.target.node.id]['subscriber_id']))
188 dmc.delete_subscriber(ctx.source.instance.runtime_properties[ctx.target.node.id]['subscriber_id'])
190 if 'publisher_id' in ctx.source.instance.runtime_properties:
191 # Delete the publisher for this bridge
192 ctx.logger.info("Removing bridge -- deleting publisher {0}".format(ctx.source.instance.runtime_properties[ctx.target.node.id]['publisher_id']))
193 dmc.delete_publisher(ctx.source.instance.runtime_properties[ctx.target.node.id]['publisher_id'])
195 ctx.logger.info("Remove bridge from {0} to {1}".format(ctx.source.node.id, ctx.target.node.id))
197 except Exception as e:
198 ctx.logger.error("Error removing bridge: {0}".format(e))
199 # Let the uninstall workflow proceed--don't throw a NonRecoverableError