|
1
|
|
|
# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
|
2
|
|
|
# contributor license agreements. See the NOTICE file distributed with |
|
3
|
|
|
# this work for additional information regarding copyright ownership. |
|
4
|
|
|
# The ASF licenses this file to You under the Apache License, Version 2.0 |
|
5
|
|
|
# (the "License"); you may not use this file except in compliance with |
|
6
|
|
|
# the License. You may obtain a copy of the License at |
|
7
|
|
|
# |
|
8
|
|
|
# http://www.apache.org/licenses/LICENSE-2.0 |
|
9
|
|
|
# |
|
10
|
|
|
# Unless required by applicable law or agreed to in writing, software |
|
11
|
|
|
# distributed under the License is distributed on an "AS IS" BASIS, |
|
12
|
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
13
|
|
|
# See the License for the specific language governing permissions and |
|
14
|
|
|
# limitations under the License. |
|
15
|
|
|
|
|
16
|
|
|
import json |
|
17
|
|
|
|
|
18
|
|
|
from st2common import log as logging |
|
19
|
|
|
from st2common.constants import action as action_constants |
|
20
|
|
|
from st2common.constants.trace import TRACE_CONTEXT |
|
21
|
|
|
from st2common.models.api.trace import TraceContext |
|
22
|
|
|
from st2common.models.db.liveaction import LiveActionDB |
|
23
|
|
|
|
|
24
|
|
|
from st2common.models.db.rule_enforcement import RuleEnforcementDB |
|
25
|
|
|
from st2common.models.utils import action_param_utils |
|
26
|
|
|
from st2common.models.api.auth import get_system_username |
|
27
|
|
|
from st2common.persistence.rule_enforcement import RuleEnforcement |
|
28
|
|
|
from st2common.services import action as action_service |
|
29
|
|
|
from st2common.services import trace as trace_service |
|
30
|
|
|
from st2common.util import reference |
|
31
|
|
|
from st2common.util import action_db as action_db_util |
|
32
|
|
|
from st2reactor.rules.datatransform import get_transformer |
|
33
|
|
|
|
|
34
|
|
|
|
|
35
|
|
|
LOG = logging.getLogger('st2reactor.ruleenforcement.enforce') |
|
36
|
|
|
|
|
37
|
|
|
EXEC_KICKED_OFF_STATES = [action_constants.LIVEACTION_STATUS_SCHEDULED, |
|
38
|
|
|
action_constants.LIVEACTION_STATUS_REQUESTED] |
|
39
|
|
|
|
|
40
|
|
|
|
|
41
|
|
|
class RuleEnforcer(object): |
|
42
|
|
|
def __init__(self, trigger_instance, rule): |
|
43
|
|
|
self.trigger_instance = trigger_instance |
|
44
|
|
|
self.rule = rule |
|
45
|
|
|
|
|
46
|
|
|
try: |
|
47
|
|
|
self.data_transformer = get_transformer(trigger_instance.payload) |
|
48
|
|
|
except Exception as e: |
|
49
|
|
|
message = ('Failed to template-ize trigger payload: %s. If the payload contains ' |
|
50
|
|
|
'special characters such as "{{" which dont\'t reference value in ' |
|
51
|
|
|
'a datastore, those characters need to be escaped' % (str(e))) |
|
52
|
|
|
raise ValueError(message) |
|
53
|
|
|
|
|
54
|
|
|
def get_resolved_parameters(self): |
|
55
|
|
|
# TODO: Refactor this to avoid additional lookup in cast_params |
|
56
|
|
|
# TODO: rename self.rule.action -> self.rule.action_exec_spec |
|
57
|
|
|
action_ref = self.rule.action['ref'] |
|
58
|
|
|
action_db = action_db_util.get_action_by_ref(action_ref) |
|
59
|
|
|
if not action_db: |
|
60
|
|
|
raise ValueError('Action "%s" doesn\'t exist' % (action_ref)) |
|
61
|
|
|
|
|
62
|
|
|
return self.data_transformer(self.rule.action.parameters) |
|
63
|
|
|
|
|
64
|
|
|
def enforce(self): |
|
65
|
|
|
rule_spec = {'ref': self.rule.ref, 'id': str(self.rule.id), 'uid': self.rule.uid} |
|
66
|
|
|
enforcement_db = RuleEnforcementDB(trigger_instance_id=str(self.trigger_instance.id), |
|
67
|
|
|
rule=rule_spec) |
|
68
|
|
|
extra = { |
|
69
|
|
|
'trigger_instance_db': self.trigger_instance, |
|
70
|
|
|
'rule_db': self.rule |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
try: |
|
74
|
|
|
execution_db = self._do_enforce() |
|
75
|
|
|
enforcement_db.execution_id = str(execution_db.id) |
|
76
|
|
|
extra['execution_db'] = execution_db |
|
77
|
|
|
except Exception as e: |
|
78
|
|
|
# Record the failure reason in the RuleEnforcement. |
|
79
|
|
|
enforcement_db.failure_reason = e.msg |
|
80
|
|
|
LOG.exception('Failed kicking off execution for rule %s.', self.rule, extra=extra) |
|
81
|
|
|
finally: |
|
82
|
|
|
self._update_enforcement(enforcement_db) |
|
83
|
|
|
|
|
84
|
|
|
if not execution_db or execution_db.status not in EXEC_KICKED_OFF_STATES: |
|
85
|
|
|
LOG.audit('Rule enforcement failed. Execution of Action %s failed. ' |
|
86
|
|
|
'TriggerInstance: %s and Rule: %s', |
|
87
|
|
|
self.rule.action.name, self.trigger_instance, self.rule, |
|
88
|
|
|
extra=extra) |
|
89
|
|
|
else: |
|
90
|
|
|
LOG.audit('Rule enforced. Execution %s, TriggerInstance %s and Rule %s.', |
|
91
|
|
|
execution_db, self.trigger_instance, self.rule, extra=extra) |
|
92
|
|
|
|
|
93
|
|
|
return execution_db |
|
94
|
|
|
|
|
95
|
|
|
def _do_enforce(self): |
|
96
|
|
|
params = self.get_resolved_parameters() |
|
97
|
|
|
LOG.info('Invoking action %s for trigger_instance %s with params %s.', |
|
98
|
|
|
self.rule.action.ref, self.trigger_instance.id, |
|
99
|
|
|
json.dumps(params)) |
|
100
|
|
|
|
|
101
|
|
|
# update trace before invoking the action. |
|
102
|
|
|
trace_context = self._update_trace() |
|
103
|
|
|
LOG.debug('Updated trace %s with rule %s.', trace_context, self.rule.id) |
|
104
|
|
|
|
|
105
|
|
|
context = { |
|
106
|
|
|
'trigger_instance': reference.get_ref_from_model(self.trigger_instance), |
|
107
|
|
|
'rule': reference.get_ref_from_model(self.rule), |
|
108
|
|
|
'user': get_system_username(), |
|
109
|
|
|
TRACE_CONTEXT: trace_context |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
return RuleEnforcer._invoke_action(self.rule.action, params, context) |
|
113
|
|
|
|
|
114
|
|
|
def _update_trace(self): |
|
115
|
|
|
""" |
|
116
|
|
|
:rtype: ``dict`` trace_context as a dict; could be None |
|
117
|
|
|
""" |
|
118
|
|
|
trace_db = None |
|
119
|
|
|
try: |
|
120
|
|
|
trace_db = trace_service.get_trace_db_by_trigger_instance(self.trigger_instance) |
|
121
|
|
|
except: |
|
122
|
|
|
LOG.exception('No Trace found for TriggerInstance %s.', self.trigger_instance.id) |
|
123
|
|
|
return None |
|
124
|
|
|
|
|
125
|
|
|
# This would signify some sort of coding error so assert. |
|
126
|
|
|
assert trace_db |
|
127
|
|
|
|
|
128
|
|
|
trace_db = trace_service.add_or_update_given_trace_db( |
|
129
|
|
|
trace_db=trace_db, |
|
130
|
|
|
rules=[ |
|
131
|
|
|
trace_service.get_trace_component_for_rule(self.rule, self.trigger_instance) |
|
132
|
|
|
]) |
|
133
|
|
|
return vars(TraceContext(id_=str(trace_db.id), trace_tag=trace_db.trace_tag)) |
|
134
|
|
|
|
|
135
|
|
|
def _update_enforcement(self, enforcement_db): |
|
136
|
|
|
try: |
|
137
|
|
|
RuleEnforcement.add_or_update(enforcement_db) |
|
138
|
|
|
except: |
|
139
|
|
|
extra = {'enforcement_db': enforcement_db} |
|
140
|
|
|
LOG.exception('Failed writing enforcement model to db.', extra=extra) |
|
141
|
|
|
|
|
142
|
|
|
@staticmethod |
|
143
|
|
|
def _invoke_action(action_exec_spec, params, context=None): |
|
144
|
|
|
""" |
|
145
|
|
|
Schedule an action execution. |
|
146
|
|
|
|
|
147
|
|
|
:type action_exec_spec: :class:`ActionExecutionSpecDB` |
|
148
|
|
|
|
|
149
|
|
|
:param params: Parameters to execute the action with. |
|
150
|
|
|
:type params: ``dict`` |
|
151
|
|
|
|
|
152
|
|
|
:rtype: :class:`LiveActionDB` on successful schedueling, None otherwise. |
|
153
|
|
|
""" |
|
154
|
|
|
action_ref = action_exec_spec['ref'] |
|
155
|
|
|
|
|
156
|
|
|
# prior to shipping off the params cast them to the right type. |
|
157
|
|
|
params = action_param_utils.cast_params(action_ref, params) |
|
158
|
|
|
liveaction = LiveActionDB(action=action_ref, context=context, parameters=params) |
|
159
|
|
|
liveaction, execution = action_service.request(liveaction) |
|
160
|
|
|
|
|
161
|
|
|
return execution |
|
162
|
|
|
|
StackStorm /
st2
