/
util.py
283 lines (221 loc) · 8.61 KB
/
util.py
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
#!/usr/bin/env python
"""
@file epu/provisioner/test/util.py
@author David LaBissoniere
@brief Provisioner testing fixtures and utils
"""
import uuid
import threading
import time
from collections import defaultdict
from libcloud.compute.base import NodeDriver, Node, NodeSize
from libcloud.compute.types import NodeState
from mock import Mock
from epu.provisioner.ctx import ContextResource
from epu.states import InstanceState
import dashi.bootstrap
log = dashi.bootstrap.get_logger(__name__)
class FakeDTRS(object):
def __init__(self):
self.result = None
self.error = None
self.sites = {}
self.credentials = defaultdict(dict)
def lookup(self, caller, dt, node=None, vars=None):
if self.error is not None:
raise self.error
if self.result is not None:
return self.result
raise Exception("bad fixture: nothing to return")
def describe_site(self, site_name):
if site_name in self.sites:
return self.sites[site_name]
raise Exception("bad fixture: nothing to return for site %s" % site_name)
def describe_credentials(self, caller, site_name, credential_type="site"):
credentials = self.credentials[credential_type]
if (caller, site_name) in credentials:
return credentials[(caller, site_name)]
raise Exception("bad fixture: nothing to return")
class FakeProvisionerNotifier(object):
"""Test fixture that captures node status updates
"""
def __init__(self):
self.nodes = {}
self.nodes_rec_count = {}
self.condition = threading.Condition()
def send_record(self, record, operation='node_status'):
"""Send a single node record to all subscribers.
"""
with self.condition:
self._send_record_internal(record)
self.condition.notify_all()
def _send_record_internal(self, record):
record = record.copy()
node_id = record['node_id']
state = record['state']
if node_id in self.nodes:
old_record = self.nodes[node_id]
old_state = old_record['state']
if old_state == state:
log.debug('Got dupe state for node %s: %s', node_id, state)
elif old_state < state:
self.nodes[node_id] = record
self.nodes_rec_count[node_id] += 1
log.debug('Got updated state record for node %s: %s -> %s',
node_id, old_state, state)
else:
log.debug('Got out-of-order record for node %s. %s -> %s',
node_id, old_state, state)
else:
self.nodes[node_id] = record
self.nodes_rec_count[node_id] = 1
log.debug('Recorded new state record for node %s: %s',
node_id, state)
def send_records(self, records, operation='node_status'):
with self.condition:
for record in records:
self._send_record_internal(record)
self.condition.notify_all()
def assure_state(self, state, nodes=None):
"""Checks that all nodes have the same state.
"""
if not self.nodes:
return False
if nodes:
for node in nodes:
if node not in self.nodes:
log.debug("node %s unknown so far", node)
return False
node_state = self.nodes[node]['state']
if not node_state == state:
log.debug("node %s in state %s", node, node_state)
return False
return True
for node in self.nodes.itervalues():
if node['state'] != state:
return False
return True
def assure_record_count(self, count, nodes=None):
if not self.nodes:
return count == 0
if nodes:
for node in nodes:
if self.nodes_rec_count.get(node, 0) != count:
return False
return True
for node_rec_count in self.nodes_rec_count.itervalues():
if node_rec_count != count:
return False
return True
def wait_for_state(self, state, nodes=None,
before=None, before_kwargs=None, timeout=30):
if before_kwargs is None:
before_kwargs = {}
start_time = time.time()
win = None
while not win:
if before:
before(**before_kwargs)
with self.condition:
win = self.assure_state(state, nodes)
if not win:
if timeout:
sleep = timeout - (time.time() - start_time)
else:
sleep = None
self.condition.wait(sleep)
log.debug("woke up")
if timeout and time.time() - start_time >= timeout:
raise Exception("timeout before state reached")
log.debug('All nodes in %s state', state)
return win
class FakeNodeDriver(NodeDriver):
type = 42 # libcloud uses a driver type number in id generation.
def __init__(self, **kwargs):
pass
def initialize(self):
FakeNodeDriver.created = []
FakeNodeDriver.destroyed = []
FakeNodeDriver.running = {}
FakeNodeDriver.create_node_error = None
FakeNodeDriver.sizes = [NodeSize("m1.small", "small", 256, 200, 1000, 1.0, None)]
def create_node(self, **kwargs):
if self.create_node_error:
raise self.create_node_error
count = int(kwargs['ex_mincount']) if 'ex_mincount' in kwargs else 1
nodes = [Node(new_id(), None, NodeState.PENDING, new_id(), new_id(),
self, size=kwargs.get('size')) for i in range(count)]
self.created.extend(nodes)
for node in nodes:
self.running[node.id] = node
return nodes
def set_node_running(self, iaas_id):
log.debug("IaaS node %s is now running", iaas_id)
self.running[iaas_id].state = NodeState.RUNNING
def set_nodes_running(self, iaas_ids):
for iaas_id in iaas_ids:
self.set_node_running(iaas_id)
def destroy_node(self, node):
self.destroyed.append(node)
self.running.pop(node.id, None)
def list_nodes(self):
return self.running.values()
def list_sizes(self):
return self.sizes[:]
class FakeContextClient(object):
def __init__(self):
self.nodes = []
self.expected_count = 0
self.complete = False
self.error = False
self.uri_query_error = {} # specific context errors
self.queried_uris = []
self.query_error = None
self.create_error = None
self.last_create = None
def create(self):
if self.create_error:
raise self.create_error
dct = {'broker_uri': "http://www.sandwich.com",
'context_id': new_id(),
'secret': new_id(),
'uri': "http://www.sandwich.com/" + new_id()}
result = ContextResource(**dct)
self.last_create = result
return result
def query(self, uri):
self.queried_uris.append(uri)
if self.query_error:
raise self.query_error
if uri in self.uri_query_error:
raise self.uri_query_error[uri]
response = Mock(nodes=self.nodes, expected_count=self.expected_count,
complete=self.complete, error=self.error)
return response
def new_id():
return str(uuid.uuid4())
def make_launch(launch_id, state, node_records, caller=None, **kwargs):
node_ids = [n['node_id'] for n in node_records]
r = {'launch_id': launch_id,
'state': state,
'node_ids': node_ids,
'creator': caller,
'context': {'uri': 'http://fakey.com/' + new_id()}}
r.update(kwargs)
return r
def make_node(launch_id, state, node_id=None, caller=None, **kwargs):
r = {'launch_id': launch_id, 'node_id': node_id or new_id(),
'state': state, 'public_ip': new_id(),
'running_timestamp': time.time(), 'creator': caller}
r.update(kwargs)
return r
def make_launch_and_nodes(launch_id, node_count, state, site='fake', caller=None):
node_records = []
node_kwargs = {'site': site, 'creator': caller}
for i in range(node_count):
if state >= InstanceState.PENDING:
node_kwargs['iaas_id'] = new_id()
rec = make_node(launch_id, state, caller=caller, **node_kwargs)
node_records.append(rec)
launch_record = make_launch(launch_id, state, node_records, caller=caller)
return launch_record, node_records