-
Notifications
You must be signed in to change notification settings - Fork 34
/
kubernetes_engine_config.py
435 lines (367 loc) · 15.2 KB
/
kubernetes_engine_config.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
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
import datetime
import logging
import subprocess
import textwrap
from os import environ
from typing import Dict, List, Optional
import yaml
from six import PY2
import dbnd_docker
from dbnd import parameter
from dbnd._core.configuration.environ_config import (
ENV_DBND__ENV_IMAGE,
ENV_DBND__ENV_MACHINE,
ENV_DBND_ENV,
ENV_DBND_USER,
)
from dbnd._core.errors import DatabandConfigError, friendly_error
from dbnd._core.log.logging_utils import set_module_logging_to_debug
from dbnd._core.task_run.task_run import TaskRun
from dbnd._core.utils.basics.environ_utils import environ_enabled
from dbnd._core.utils.json_utils import dumps_safe
from dbnd._core.utils.string_utils import clean_job_name_dns1123
from dbnd._core.utils.structures import combine_mappings
from dbnd_docker.container_engine_config import ContainerEngineConfig
from dbnd_docker.docker.docker_task import DockerRunTask
from targets import target
logger = logging.getLogger(__name__)
ENV_DBND_POD_NAME = "DBND__POD_NAME"
ENV_DBND_POD_NAMESPACE = "DBND__POD_NAMESPACE"
ENV_DBND_DOCKER_IMAGE = "DBND__DOCKER_IMAGE"
ENV_DBND_AUTO_REMOVE_POD = "DBND__AUTO_REMOVE_POD"
class KubernetesEngineConfig(ContainerEngineConfig):
_conf__task_family = "kubernetes"
cluster_context = parameter.none().help("Kubernetes cluster context")[str]
config_file = parameter.none().help("Custom Kubernetes config file")[str]
in_cluster = parameter(default=False)[bool]
image_pull_policy = parameter.value(
"IfNotPresent", description="Kubernetes image_pull_policy flag"
)
image_pull_secrets = parameter.none().help("Secret to use for image pull")[str]
keep_finished_pods = parameter(default=False).help(
"Don't delete pods on completion"
)[bool]
keep_failed_pods = parameter(default=False).help("Don't delete failed pods")[bool]
namespace = parameter(default="default")[str]
secrets = parameter(empty_default=True).help(
"User secrets to be added to every created pod"
)[List]
system_secrets = parameter(empty_default=True).help(
"System secrets (used by Databand Framework)"
)[List]
env_vars = parameter(empty_default=True)[Dict]
node_selectors = parameter(empty_default=True)[Dict]
annotations = parameter(empty_default=True)[Dict]
pods_creation_batch_size = parameter.value(10)[int]
service_account_name = parameter.none()[str]
gcp_service_account_keys = parameter.none()[
str
] # it's actually dict, but KubeConf expects str
affinity = parameter(empty_default=True)[Dict]
tolerations = parameter(empty_default=True)[List]
hostnetwork = parameter.value(False)
configmaps = parameter(empty_default=True)[List[str]]
volumes = parameter.none()[List[str]]
volume_mounts = parameter.none()[List[str]]
security_context = parameter.none()[List[str]]
labels = parameter.none()[Dict]
request_memory = parameter.none()[str]
request_cpu = parameter.none()[str]
limit_memory = parameter.none()[str]
limit_cpu = parameter.none()[str]
requests = parameter.none()[Dict]
limits = parameter.none()[Dict]
pod_exit_code_to_retry_count = parameter(empty_default=True).help(
"Mapping between pod exit code to amount of pod retry attempts"
)[Dict]
pod_retry_delay = parameter.help(
"The delay between each pod retry attempt in time delta format. 1m, 5s, 1h, etc."
)[datetime.timedelta]
startup_timeout_seconds = parameter.value(120)
show_pod_log = parameter(default=False).help(
"When using this engine as the task_engine, run tasks sequentially and stream their logs"
)[bool]
debug = parameter(default=False).help(
"Equalent to show_pod_log=True + show all debug information"
)[bool]
prefix_remote_log = parameter(default=True).help(
"Adds [driver] or [<task_name>] prefix to logs streamed from Kubernetes to the local log"
)
check_unschedulable_condition = parameter(default=True).help(
"Try to detect non-transient issues that prevent the pod from being scheduled and fail the run if needed"
)
check_cluster_resource_capacity = parameter(default=True).help(
"When a pod can't be scheduled due to cpu or memory constraints, check if the constraints are possible to satisfy in the cluster"
)
startup_timeout = parameter(default="10m").help(
"Time to wait for pod getting into Running state"
)[datetime.timedelta]
dashboard_url = parameter(default=None).help(
"skeleton url to display as kubernetes dashboard"
)[str]
pod_log_url = parameter(default=None).help("skeleton url to display logs of pods")[
str
]
pod_yaml = parameter(default="${DBND_LIB}/conf/kubernetes-pod.yaml").help(
"Base yaml to use to run databand task/driver"
)[str]
trap_exit_file_flag = parameter(default=None).help("trap exit file")[str]
auto_remove = parameter(
default=False,
description="Auto-removal of the pod when container has finished.",
)[bool]
detach_run = parameter(
default=False, description="Submit run only, do not wait for it completion."
)[bool]
submit_termination_grace_period = parameter(
description="timedelta to let the submitted pod enter a final state"
)[datetime.timedelta]
def _initialize(self):
super(KubernetesEngineConfig, self)._initialize()
if self.debug:
logger.warning(
"Running in debug mode, setting all k8s loggers to debug, waiting for every pod completion!"
)
import airflow.contrib.kubernetes
set_module_logging_to_debug([dbnd_docker, airflow.contrib.kubernetes])
self.detach_run = False
if self.show_pod_log:
logger.warning(
"Showing pod logs at runtime, waiting for every pod completion!"
)
self.detach_run = False
if self.auto_remove and not self.detach_run:
logger.warning(
"Can't auto remove pod if not running from detach_run=True mode, "
"switching to auto_remove=False"
)
self.auto_remove = False
def get_docker_ctrl(self, task_run):
from dbnd_docker.kubernetes.kubernetes_task_run_ctrl import (
KubernetesTaskRunCtrl,
)
return KubernetesTaskRunCtrl(task_run=task_run)
def submit_to_engine_task(self, env, task_name, args, interactive=True):
docker_engine = self
if not interactive:
docker_engine = docker_engine.clone(auto_remove=True, detach_run=True)
return DockerRunTask(
task_name=task_name,
command=subprocess.list2cmdline(args),
image=self.full_image,
docker_engine=docker_engine,
task_is_system=True,
)
def cleanup_after_run(self):
# this run was submitted by task_run_async - we need to cleanup ourself
if not environ_enabled(ENV_DBND_AUTO_REMOVE_POD):
return
if ENV_DBND_POD_NAME in environ and ENV_DBND_POD_NAMESPACE in environ:
try:
logger.warning(
"Auto deleteing pod as accordingly to '%s' env variable"
% ENV_DBND_AUTO_REMOVE_POD
)
kube_dbnd = self.build_kube_dbnd()
kube_dbnd.delete_pod(
name=environ[ENV_DBND_POD_NAME],
namespace=environ[ENV_DBND_POD_NAMESPACE],
)
except Exception as e:
logger.warning("Tried to delete this pod but failed: %s" % e)
else:
logger.warning(
"Auto deleting pod as set, but pod name and pod namespace is not defined"
)
def get_dashboard_link(self, pod):
if not self.dashboard_url:
return None
try:
return self.dashboard_url.format(namespace=pod.namespace, pod=pod.name)
except Exception:
logger.exception(
"Failed to generate dashboard url from %s" % self.dashboard_url
)
return None
def get_pod_log_link(self, pod):
if not self.pod_log_url:
return None
try:
return self.pod_log_url.format(
namespace=pod.namespace,
pod=pod.name,
timestamp=datetime.datetime.now().isoformat(),
)
except Exception:
logger.exception("Internal error on generating pod log url")
return None
def get_kube_client(self, in_cluster=None):
from kubernetes import config, client
if in_cluster is None:
in_cluster = self.in_cluster
if in_cluster:
config.load_incluster_config()
else:
config.load_kube_config(
config_file=self.config_file, context=self.cluster_context
)
if PY2:
# For connect_get_namespaced_pod_exec
from kubernetes.client import Configuration
configuration = Configuration()
configuration.assert_hostname = False
Configuration.set_default(configuration)
return client.CoreV1Api()
def build_kube_dbnd(self, in_cluster=None):
from dbnd_docker.kubernetes.kube_dbnd_client import DbndKubernetesClient
from kubernetes.config import ConfigException
try:
kube_client = self.get_kube_client(in_cluster=in_cluster)
except ConfigException as e:
raise friendly_error.executor_k8s.failed_to_connect_to_cluster(
self.in_cluster, e
)
kube_dbnd = DbndKubernetesClient(kube_client=kube_client, engine_config=self)
return kube_dbnd
def build_pod(
self,
task_run,
cmds,
args=None,
labels=None,
try_number=None,
include_system_secrets=False,
):
# type: (TaskRun, List[str], Optional[List[str]], Optional[Dict[str,str]], Optional[int]) ->Pod
pod_name = task_run.job_id__dns1123
if try_number is not None:
pod_name = "%s-%s" % (pod_name, try_number)
image = self.full_image
labels = combine_mappings(labels, self.labels)
labels["dbnd_run_uid"] = clean_job_name_dns1123(str(task_run.run.run_uid))
labels["dbnd_task_run_uid"] = clean_job_name_dns1123(str(task_run.task_run_uid))
labels[
"dbnd"
] = "task_run" # for easier pod deletion (kubectl delete pod -l dbnd=task_run -n <my_namespace>)
annotations = self.annotations.copy()
if self.gcp_service_account_keys:
annotations[
"iam.cloud.google.com/service-account"
] = self.gcp_service_account_keys
annotations["dbnd_tracker"] = task_run.task_tracker_url
from dbnd_docker.kubernetes.dbnd_extended_resources import DbndExtendedResources
resources = DbndExtendedResources(
requests=self.requests,
limits=self.limits,
request_memory=self.request_memory,
request_cpu=self.request_cpu,
limit_memory=self.limit_memory,
limit_cpu=self.limit_cpu,
)
env_vars = {
ENV_DBND_POD_NAME: pod_name,
ENV_DBND_POD_NAMESPACE: self.namespace,
ENV_DBND_USER: task_run.task_run_env.user,
ENV_DBND__ENV_IMAGE: image,
ENV_DBND_ENV: task_run.run.env.task_name,
ENV_DBND__ENV_MACHINE: "%s at %s" % (pod_name, self.namespace),
}
if self.auto_remove:
env_vars[ENV_DBND_AUTO_REMOVE_POD] = "True"
env_vars[self._params.get_param_env_key("in_cluster")] = "True"
env_vars["AIRFLOW__KUBERNETES__IN_CLUSTER"] = "True"
env_vars[
"DBND__RUN_INFO__SOURCE_VERSION"
] = task_run.run.context.task_run_env.user_code_version
# we want that all next runs will be able to use the image that we have in our configuration
env_vars.update(
self._params.to_env_map("container_repository", "container_tag")
)
env_vars.update(self.env_vars)
env_vars.update(task_run.run.get_context_spawn_env())
secrets = self.get_secrets(include_system_secrets=include_system_secrets)
from airflow.contrib.kubernetes.pod import Pod
if self.trap_exit_file_flag:
args = [
textwrap.dedent(
"""
trap "touch {trap_file}" EXIT
{command}
""".format(
trap_file=self.trap_exit_file_flag,
command=subprocess.list2cmdline(cmds),
)
)
]
# we update cmd now
cmds = ["/bin/bash", "-c"]
if not self.container_tag:
raise DatabandConfigError(
"Your container tag is None, please check your configuration",
help_msg="Container tag should be assigned",
)
pod = Pod(
namespace=self.namespace,
name=pod_name,
envs=env_vars,
image=image,
cmds=cmds,
args=args,
labels=labels,
image_pull_policy=self.image_pull_policy,
image_pull_secrets=self.image_pull_secrets,
secrets=secrets,
service_account_name=self.service_account_name,
volumes=self.volumes,
volume_mounts=self.volume_mounts,
annotations=annotations,
node_selectors=self.node_selectors,
affinity=self.affinity,
tolerations=self.tolerations,
security_context=self.security_context,
configmaps=self.configmaps,
hostnetwork=self.hostnetwork,
resources=resources,
)
if self.pod_yaml:
pod.pod_yaml = target(self.pod_yaml).read()
return pod
def get_secrets(self, include_system_secrets=True):
"""Defines any necessary secrets for the pod executor"""
from airflow.contrib.kubernetes.secret import Secret
result = []
if include_system_secrets:
secrets = self.system_secrets + self.secrets
else:
secrets = self.secrets
for secret_data in secrets:
result.append(
Secret(
deploy_type=secret_data.get("type"),
deploy_target=secret_data.get("target"),
secret=secret_data.get("secret"),
key=secret_data.get("key"),
)
)
return result
def build_kube_pod_req(self, pod):
from dbnd_airflow.airflow_extensions.request_factory import (
DbndPodRequestFactory,
)
kube_req_factory = DbndPodRequestFactory()
if hasattr(pod, "pod_yaml"):
kube_req_factory._yaml = pod.pod_yaml
req = kube_req_factory.create(pod)
return req
def readable_pod_request(pod_req):
try:
return yaml.dump(
pod_req,
encoding="utf-8",
allow_unicode=True,
sort_keys=False,
default_flow_style=False,
).decode("ascii", errors="ignore")
except Exception as ex:
logger.info("Failed to create readable pod request representation: %s", ex)
return dumps_safe(pod_req)