-
Notifications
You must be signed in to change notification settings - Fork 14.1k
/
qubole_hook.py
269 lines (224 loc) · 9.75 KB
/
qubole_hook.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
# -*- coding: utf-8 -*-
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
#
"""Qubole hook"""
import logging
import os
import time
import datetime
import six
from qds_sdk.qubole import Qubole
from qds_sdk.commands import Command, HiveCommand, PrestoCommand, HadoopCommand, \
PigCommand, ShellCommand, SparkCommand, DbTapQueryCommand, DbExportCommand, \
DbImportCommand, SqlCommand
from airflow.exceptions import AirflowException
from airflow.hooks.base_hook import BaseHook
from airflow.configuration import conf, mkdir_p
from airflow.utils.state import State
log = logging.getLogger(__name__)
COMMAND_CLASSES = {
"hivecmd": HiveCommand,
"prestocmd": PrestoCommand,
"hadoopcmd": HadoopCommand,
"shellcmd": ShellCommand,
"pigcmd": PigCommand,
"sparkcmd": SparkCommand,
"dbtapquerycmd": DbTapQueryCommand,
"dbexportcmd": DbExportCommand,
"dbimportcmd": DbImportCommand,
"sqlcmd": SqlCommand
}
POSITIONAL_ARGS = {
'hadoopcmd': ['sub_command'],
'shellcmd': ['parameters'],
'pigcmd': ['parameters']
}
def flatten_list(list_of_lists):
"""Flatten the list"""
return [element for array in list_of_lists for element in array]
def filter_options(options):
"""Remove options from the list"""
options_to_remove = ["help", "print-logs-live", "print-logs"]
return [option for option in options if option not in options_to_remove]
def get_options_list(command_class):
"""Get options list"""
options_list = [option.get_opt_string().strip("--") for option in command_class.optparser.option_list]
return filter_options(options_list)
def build_command_args():
"""Build Command argument from command and options"""
command_args, hyphen_args = {}, set()
for cmd in COMMAND_CLASSES:
# get all available options from the class
opts_list = get_options_list(COMMAND_CLASSES[cmd])
# append positional args if any for the command
if cmd in POSITIONAL_ARGS:
opts_list += POSITIONAL_ARGS[cmd]
# get args with a hyphen and replace them with underscore
for index, opt in enumerate(opts_list):
if "-" in opt:
opts_list[index] = opt.replace("-", "_")
hyphen_args.add(opts_list[index])
command_args[cmd] = opts_list
return command_args, list(hyphen_args)
COMMAND_ARGS, HYPHEN_ARGS = build_command_args()
class QuboleHook(BaseHook):
"""Hook for Qubole communication"""
def __init__(self, *args, **kwargs): # pylint: disable=unused-argument
conn = self.get_connection(kwargs['qubole_conn_id'])
Qubole.configure(api_token=conn.password, api_url=conn.host)
self.task_id = kwargs['task_id']
self.dag_id = kwargs['dag'].dag_id
self.kwargs = kwargs
self.cls = COMMAND_CLASSES[self.kwargs['command_type']]
self.cmd = None
self.task_instance = None
@staticmethod
def handle_failure_retry(context):
"""Handle retries in case of failures"""
ti = context['ti']
cmd_id = ti.xcom_pull(key='qbol_cmd_id', task_ids=ti.task_id)
if cmd_id is not None:
cmd = Command.find(cmd_id)
if cmd is not None:
if cmd.status == 'done':
log.info('Command ID: %s has been succeeded, hence marking this '
'TI as Success.', cmd_id)
ti.state = State.SUCCESS
elif cmd.status == 'running':
log.info('Cancelling the Qubole Command Id: %s', cmd_id)
cmd.cancel()
def execute(self, context):
"""Execute call"""
args = self.cls.parse(self.create_cmd_args(context))
self.cmd = self.cls.create(**args)
self.task_instance = context['task_instance']
context['task_instance'].xcom_push(key='qbol_cmd_id', value=self.cmd.id)
self.log.info(
"Qubole command created with Id: %s and Status: %s",
self.cmd.id, self.cmd.status
)
while not Command.is_done(self.cmd.status):
time.sleep(Qubole.poll_interval)
self.cmd = self.cls.find(self.cmd.id)
self.log.info("Command Id: %s and Status: %s", self.cmd.id, self.cmd.status)
if 'fetch_logs' in self.kwargs and self.kwargs['fetch_logs'] is True:
self.log.info("Logs for Command Id: %s \n%s", self.cmd.id, self.cmd.get_log())
if self.cmd.status != 'done':
raise AirflowException('Command Id: {0} failed with Status: {1}'.format(
self.cmd.id, self.cmd.status))
def kill(self, ti):
"""
Kill (cancel) a Qubole command
:param ti: Task Instance of the dag, used to determine the Quboles command id
:return: response from Qubole
"""
if self.cmd is None:
if not ti and not self.task_instance:
raise Exception("Unable to cancel Qubole Command, context is unavailable!")
elif not ti:
ti = self.task_instance
cmd_id = ti.xcom_pull(key="qbol_cmd_id", task_ids=ti.task_id)
self.cmd = self.cls.find(cmd_id)
if self.cls and self.cmd:
self.log.info('Sending KILL signal to Qubole Command Id: %s', self.cmd.id)
self.cmd.cancel()
def get_results(self, ti=None, fp=None, inline=True, delim=None, fetch=True):
"""
Get results (or just s3 locations) of a command from Qubole and save into a file
:param ti: Task Instance of the dag, used to determine the Quboles command id
:param fp: Optional file pointer, will create one and return if None passed
:param inline: True to download actual results, False to get s3 locations only
:param delim: Replaces the CTL-A chars with the given delim, defaults to ','
:param fetch: when inline is True, get results directly from s3 (if large)
:return: file location containing actual results or s3 locations of results
"""
if fp is None:
iso = datetime.datetime.utcnow().isoformat()
logpath = os.path.expanduser(
conf.get('core', 'BASE_LOG_FOLDER')
)
resultpath = logpath + '/' + self.dag_id + '/' + self.task_id + '/results'
mkdir_p(resultpath)
fp = open(resultpath + '/' + iso, 'wb')
if self.cmd is None:
cmd_id = ti.xcom_pull(key="qbol_cmd_id", task_ids=self.task_id)
self.cmd = self.cls.find(cmd_id)
self.cmd.get_results(fp, inline, delim, fetch)
fp.flush()
fp.close()
return fp.name
def get_log(self, ti):
"""
Get Logs of a command from Qubole
:param ti: Task Instance of the dag, used to determine the Quboles command id
:return: command log as text
"""
if self.cmd is None:
cmd_id = ti.xcom_pull(key="qbol_cmd_id", task_ids=self.task_id)
Command.get_log_id(cmd_id)
def get_jobs_id(self, ti):
"""
Get jobs associated with a Qubole commands
:param ti: Task Instance of the dag, used to determine the Quboles command id
:return: Job information associated with command
"""
if self.cmd is None:
cmd_id = ti.xcom_pull(key="qbol_cmd_id", task_ids=self.task_id)
Command.get_jobs_id(cmd_id)
def create_cmd_args(self, context):
"""Creates command arguments"""
args = []
cmd_type = self.kwargs['command_type']
inplace_args = None
tags = {self.dag_id, self.task_id, context['run_id']}
positional_args_list = flatten_list(POSITIONAL_ARGS.values())
for k, v in self.kwargs.items():
if k in COMMAND_ARGS[cmd_type]:
if k in HYPHEN_ARGS:
args.append("--{0}={1}".format(k.replace('_', '-'), v))
elif k in positional_args_list:
inplace_args = v
elif k == 'tags':
if isinstance(v, six.string_types):
tags.add(v)
elif isinstance(v, (list, tuple)):
for val in v:
tags.add(val)
for key, value in self.kwargs.items():
if key in COMMAND_ARGS[cmd_type]:
if key in HYPHEN_ARGS:
args.append("--{0}={1}".format(key.replace('_', '-'), value))
elif key in positional_args_list:
inplace_args = value
elif key == 'tags':
self._add_tags(tags, value)
else:
args.append("--{0}={1}".format(key, value))
if key == 'notify' and value is True:
args.append("--notify")
args.append("--tags={0}".format(','.join(filter(None, tags))))
if inplace_args is not None:
args += inplace_args.split(' ')
return args
@staticmethod
def _add_tags(tags, value):
if isinstance(value, six.string_types):
tags.add(value)
elif isinstance(value, (list, tuple)):
tags.extend(value)