1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
# ============LICENSE_START====================================================
# org.onap.ccsdk
# =============================================================================
# Copyright (c) 2017-2019 AT&T Intellectual Property. All rights reserved.
# =============================================================================
# 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.
# ============LICENSE_END======================================================
from cloudify import ctx
from cloudify.decorators import operation
from cloudify.exceptions import NonRecoverableError
from dmaapplugin import DMAAP_API_URL, DMAAP_USER, DMAAP_PASS
from dmaaputils import random_string
from dmaapcontrollerif.dmaap_requests import DMaaPControllerHandle
# Set up a subscriber to a source feed
def _set_up_subscriber(dmc, source_feed_id, loc, delivery_url, username, userpw):
# Add subscriber to source feed
add_sub = dmc.add_subscriber(source_feed_id, loc, delivery_url, username, userpw)
add_sub.raise_for_status()
return add_sub.json()
# Set up a publisher to a target feed
def _set_up_publisher(dmc, target_feed_id, loc):
username = random_string(8)
userpw = random_string(16)
add_pub = dmc.add_publisher(target_feed_id, loc, username, userpw)
add_pub.raise_for_status()
pub_info = add_pub.json()
return pub_info["pubId"], username, userpw
# Get a central location to use when creating a publisher or subscriber
def _get_central_location(dmc):
locations = dmc.get_dcae_central_locations()
if len(locations) < 1:
raise Exception('No central location found for setting up DR bridging')
return locations[0] # We take the first one. Typically there will be two central locations
# Set up a "bridge" between two feeds internal to DCAE
# A source feed "bridges_to" a target feed, meaning that anything published to
# the source feed will be delivered to subscribers to the target feed (as well as
# to subscribers of the source feed).
#
# The bridge is established by first adding a publisher to the target feed. The result of doing this
# is a publish URL and a set of publication credentials.
#The publish URL and publication credentials are used to set up a subscriber to the source feed.
#I.e., we tell the source feed to deliver to an endpoint which is actually a publish
# endpoint for the target feed.
@operation
def create_dr_bridge(**kwargs):
try:
# Get source and target feed ids
if 'feed_id' in ctx.target.instance.runtime_properties:
target_feed_id = ctx.target.instance.runtime_properties['feed_id']
else:
raise Exception('Target feed has no feed_id property')
if 'feed_id' in ctx.source.instance.runtime_properties:
source_feed_id = ctx.source.instance.runtime_properties['feed_id']
else:
raise Exception('Source feed has no feed_id property')
dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
# Get a location to use when creating a publisher or subscriber--a central location seems reasonable
loc = _get_central_location(dmc)
ctx.logger.info('Creating bridge from feed {0} to feed {1} using location {2}'.format(source_feed_id, target_feed_id, loc))
# Add publisher to target feed
publisher_id, username, userpw = _set_up_publisher(dmc, target_feed_id, loc)
ctx.logger.info("Added publisher id {0} to target feed {1} with user {2}".format(publisher_id, target_feed_id, username))
# Add subscriber to source feed
delivery_url = ctx.target.instance.runtime_properties['publish_url']
subscriber_info = _set_up_subscriber(dmc, source_feed_id, loc, delivery_url, username, userpw)
subscriber_id = subscriber_info["subId"]
ctx.logger.info("Added subscriber id {0} to source feed {1} with delivery url {2}".format(subscriber_id, source_feed_id, delivery_url))
# Save the publisher and subscriber IDs on the source node, indexed by the target node id
ctx.source.instance.runtime_properties[ctx.target.node.id] = {"publisher_id": publisher_id, "subscriber_id": subscriber_id}
except Exception as e:
ctx.logger.error("Error creating bridge: {0}".format(e))
raise NonRecoverableError(e)
# Set up a bridge from an internal DCAE feed to a feed in an external Data Router system
# The target feed needs to be provisioned in the external Data Router system. A publisher
# to that feed must also be set up in the external Data Router system. The publish URL,
# username, and password need to be captured in a target node of type dcae.nodes.ExternalTargetFeed.
# The bridge is established by setting up a subscriber to the internal DCAE source feed using the
# external feed publisher parameters as delivery parameters for the subscriber.
@operation
def create_external_dr_bridge(**kwargs):
try:
# Make sure target feed has full set of properties
if 'url' in ctx.target.node.properties and 'username' in ctx.target.node.properties and 'userpw' in ctx.target.node.properties:
url = ctx.target.node.properties['url']
username = ctx.target.node.properties['username']
userpw = ctx.target.node.properties['userpw']
else:
raise Exception ("Target feed missing url, username, and/or user pw")
# Make sure source feed has a feed ID
if 'feed_id' in ctx.source.instance.runtime_properties:
source_feed_id = ctx.source.instance.runtime_properties['feed_id']
else:
raise Exception('Source feed has no feed_id property')
dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
# Get a central location to use when creating subscriber
loc = _get_central_location(dmc)
ctx.logger.info('Creating external bridge from feed {0} to external url {1} using location {2}'.format(source_feed_id, url, loc))
# Create subscription to source feed using properties of the external target feed
subscriber_info = _set_up_subscriber(dmc, source_feed_id, loc, url, username, userpw)
subscriber_id = subscriber_info["subId"]
ctx.logger.info("Added subscriber id {0} to source feed {1} with delivery url {2}".format(subscriber_id, source_feed_id, url))
# Save the subscriber ID on the source node, indexed by the target node id
ctx.source.instance.runtime_properties[ctx.target.node.id] = {"subscriber_id": subscriber_id}
except Exception as e:
ctx.logger.error("Error creating external bridge: {0}".format(e))
raise NonRecoverableError(e)
# Set up a bridge from a feed in an external Data Router system to an internal DCAE feed.
# The bridge is established by creating a publisher on the internal DCAE feed. Then a subscription
# to the external feed is created through manual provisioning in the external Data Router system, using
# the publish URL and the publisher username and password for the internal feed as the delivery parameters
# for the external subscription.
# In order to obtain the publish URL, publisher username, and password, a blueprint using this sort of
# bridge will typically have an output that exposes the runtime_property set on the source node in this operation.
@operation
def create_external_source_dr_bridge(**kwargs):
try:
# Get target feed id
if 'feed_id' in ctx.target.instance.runtime_properties:
target_feed_id = ctx.target.instance.runtime_properties['feed_id']
else:
raise Exception('Target feed has no feed_id property')
dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
# Get a central location to use when creating a publisher
loc = _get_central_location(dmc)
# Create a publisher on the target feed
publisher_id, username, userpw = _set_up_publisher(dmc, target_feed_id, loc)
# Save the publisher info on the source node, indexed by the target node
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}
except Exception as e:
ctx.logger.error("Error creating external source bridge: {0}".format(e))
# Remove the bridge between the relationship source and target.
# For a bridge between 2 internal feeds, deletes the subscriber on the source feed and the publisher on the target feed.
# For a bridge to an external target feed, deletes the subscriber on the source feed.
# For a bridge from an external source feed, deletes the publisher on the target feed.
@operation
def remove_dr_bridge(**kwargs):
try:
dmc = DMaaPControllerHandle(DMAAP_API_URL, DMAAP_USER, DMAAP_PASS, ctx.logger)
if ctx.target.node.id in ctx.source.instance.runtime_properties:
if 'subscriber_id' in ctx.source.instance.runtime_properties[ctx.target.node.id]:
# Delete the subscription for this bridge
ctx.logger.info("Removing bridge -- deleting subscriber {0}".format(ctx.source.instance.runtime_properties[ctx.target.node.id]['subscriber_id']))
dmc.delete_subscriber(ctx.source.instance.runtime_properties[ctx.target.node.id]['subscriber_id'])
if 'publisher_id' in ctx.source.instance.runtime_properties:
# Delete the publisher for this bridge
ctx.logger.info("Removing bridge -- deleting publisher {0}".format(ctx.source.instance.runtime_properties[ctx.target.node.id]['publisher_id']))
dmc.delete_publisher(ctx.source.instance.runtime_properties[ctx.target.node.id]['publisher_id'])
ctx.logger.info("Remove bridge from {0} to {1}".format(ctx.source.node.id, ctx.target.node.id))
except Exception as e:
ctx.logger.error("Error removing bridge: {0}".format(e))
# Let the uninstall workflow proceed--don't throw a NonRecoverableError
|
