ecs_deploy.ecs.EcsAction.is_deployed() - Code Metrics - Inspection of "Merge tag '1.5.0' into develop" - fabfuel/ecs-deploy - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Branch — develop (de6256)

by Fabian

created 2018-11-11 06:01 UTC

ecs_deploy.ecs.EcsAction.is_deployed() A

↳ Parent: ecs_deploy.ecs

Complexity

Conditions

Size

Total Lines	14
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	3

Importance

Changes

Metric	Value
eloc	12
dl	0
loc	14
rs	9.8
c	0
b	0
f	0
ccs	8
cts	8
cp	1
cc	3
nop	2
crap	3

from datetime import datetime

from boto3.session import Session
from botocore.exceptions import ClientError, NoCredentialsError
from dateutil.tz.tz import tzlocal


class EcsClient(object):
    def __init__(self, access_key_id=None, secret_access_key=None,
                 region=None, profile=None):
        session = Session(aws_access_key_id=access_key_id,
                          aws_secret_access_key=secret_access_key,
                          region_name=region,
                          profile_name=profile)
        self.boto = session.client(u'ecs')

    def describe_services(self, cluster_name, service_name):
        return self.boto.describe_services(
            cluster=cluster_name,
            services=[service_name]
        )

    def describe_task_definition(self, task_definition_arn):
        try:
            return self.boto.describe_task_definition(
                taskDefinition=task_definition_arn
            )
        except ClientError:
            raise UnknownTaskDefinitionError(
                u'Unknown task definition arn: %s' % task_definition_arn
            )

    def list_tasks(self, cluster_name, service_name):
        return self.boto.list_tasks(
            cluster=cluster_name,
            serviceName=service_name
        )

    def describe_tasks(self, cluster_name, task_arns):
        return self.boto.describe_tasks(cluster=cluster_name, tasks=task_arns)

    def register_task_definition(self, family, containers, volumes, role_arn,
                                 additional_properties):
        return self.boto.register_task_definition(
            family=family,
            containerDefinitions=containers,
            volumes=volumes,
            taskRoleArn=role_arn,
            **additional_properties
        )

    def deregister_task_definition(self, task_definition_arn):
        return self.boto.deregister_task_definition(
            taskDefinition=task_definition_arn
        )

    def update_service(self, cluster, service, desired_count, task_definition):
        if desired_count is None:
            return self.boto.update_service(
                cluster=cluster,
                service=service,
                taskDefinition=task_definition
            )
        return self.boto.update_service(
            cluster=cluster,
            service=service,
            desiredCount=desired_count,
            taskDefinition=task_definition
        )

    def run_task(self, cluster, task_definition, count, started_by, overrides):
        return self.boto.run_task(
            cluster=cluster,
            taskDefinition=task_definition,
            count=count,
            startedBy=started_by,
            overrides=overrides
        )


class EcsService(dict):
    def __init__(self, cluster, service_definition=None, **kwargs):
        self._cluster = cluster
        super(EcsService, self).__init__(service_definition, **kwargs)

    def set_task_definition(self, task_definition):
        self[u'taskDefinition'] = task_definition.arn

    @property
    def cluster(self):
        return self._cluster

    @property
    def name(self):
        return self.get(u'serviceName')

    @property
    def task_definition(self):
        return self.get(u'taskDefinition')

    @property
    def desired_count(self):
        return self.get(u'desiredCount')

    @property
    def deployment_created_at(self):
        for deployment in self.get(u'deployments'):
            if deployment.get(u'status') == u'PRIMARY':
                return deployment.get(u'createdAt')
        return datetime.now()

    @property
    def deployment_updated_at(self):
        for deployment in self.get(u'deployments'):
            if deployment.get(u'status') == u'PRIMARY':
                return deployment.get(u'updatedAt')
        return datetime.now()

    @property
    def errors(self):
        return self.get_warnings(
            since=self.deployment_updated_at
        )

    @property
    def older_errors(self):
        return self.get_warnings(
            since=self.deployment_created_at,
            until=self.deployment_updated_at
        )

    def get_warnings(self, since=None, until=None):
        since = since or self.deployment_created_at
        until = until or datetime.now(tz=tzlocal())
        errors = {}
        for event in self.get(u'events'):
            if u'unable' not in event[u'message']:
                continue
            if since < event[u'createdAt'] < until:
                errors[event[u'createdAt']] = event[u'message']
        return errors


class EcsTaskDefinition(object):
    def __init__(self, containerDefinitions, volumes, family, revision,
                 status, taskDefinitionArn, requiresAttributes=None,
                 taskRoleArn=None, compatibilities=None, **kwargs):
        self.containers = containerDefinitions
        self.volumes = volumes
        self.family = family
        self.revision = revision
        self.status = status
        self.arn = taskDefinitionArn
        self.requires_attributes = requiresAttributes or {}
        self.role_arn = taskRoleArn or u''
        self.additional_properties = kwargs
        self._diff = []

        # the compatibilities parameter is returned from the ECS API, when
        # describing a task, but may not be included, when registering a new
        # task definition. Just storing it for now.
        self.compatibilities = compatibilities

    @property
    def container_names(self):
        for container in self.containers:
            yield container[u'name']

    @property
    def family_revision(self):
        return '%s:%d' % (self.family, self.revision)

    @property
    def diff(self):
        return self._diff

    def get_overrides(self):
        override = dict()
        overrides = []
        for diff in self.diff:
            if override.get('name') != diff.container:
                override = dict(name=diff.container)
                overrides.append(override)
            if diff.field == 'command':
                override['command'] = self.get_overrides_command(diff.value)
            elif diff.field == 'environment':
                override['environment'] = self.get_overrides_env(diff.value)
        return overrides

    @staticmethod
    def get_overrides_command(command):
        return command.split(' ')

    @staticmethod
    def get_overrides_env(env):
        return [{"name": e, "value": env[e]} for e in env]

    def set_images(self, tag=None, **images):
        self.validate_container_options(**images)
        for container in self.containers:
            if container[u'name'] in images:
                new_image = images[container[u'name']]
                diff = EcsTaskDefinitionDiff(
                    container=container[u'name'],
                    field=u'image',
                    value=new_image,
                    old_value=container[u'image']
                )
                self._diff.append(diff)
                container[u'image'] = new_image
            elif tag:
                image_definition = container[u'image'].rsplit(u':', 1)
                new_image = u'%s:%s' % (image_definition[0], tag.strip())
                diff = EcsTaskDefinitionDiff(
                    container=container[u'name'],
                    field=u'image',
                    value=new_image,
                    old_value=container[u'image']
                )
                self._diff.append(diff)
                container[u'image'] = new_image

    def set_commands(self, **commands):
        self.validate_container_options(**commands)
        for container in self.containers:
            if container[u'name'] in commands:
                new_command = commands[container[u'name']]
                diff = EcsTaskDefinitionDiff(
                    container=container[u'name'],
                    field=u'command',
                    value=new_command,
                    old_value=container.get(u'command')
                )
                self._diff.append(diff)
                container[u'command'] = [new_command]

    def set_environment(self, environment_list):
        environment = {}

        for env in environment_list:
            environment.setdefault(env[0], {})
            environment[env[0]][env[1]] = env[2]

        self.validate_container_options(**environment)
        for container in self.containers:
            if container[u'name'] in environment:
                self.apply_container_environment(
                    container=container,
                    new_environment=environment[container[u'name']]
                )

    def apply_container_environment(self, container, new_environment):
        environment = container.get('environment', {})
        old_environment = {env['name']: env['value'] for env in environment}
        merged = old_environment.copy()
        merged.update(new_environment)

        if old_environment == merged:
            return

        diff = EcsTaskDefinitionDiff(
            container=container[u'name'],
            field=u'environment',
            value=merged,
            old_value=old_environment
        )
        self._diff.append(diff)

        container[u'environment'] = [
            {"name": e, "value": merged[e]} for e in merged
        ]

    def validate_container_options(self, **container_options):
        for container_name in container_options:
            if container_name not in self.container_names:
                raise UnknownContainerError(
                    u'Unknown container: %s' % container_name
                )

    def set_role_arn(self, role_arn):
        if role_arn:
            diff = EcsTaskDefinitionDiff(
                container=None,
                field=u'role_arn',
                value=role_arn,
                old_value=self.role_arn
            )
            self.role_arn = role_arn
            self._diff.append(diff)


class EcsTaskDefinitionDiff(object):
    def __init__(self, container, field, value, old_value):
        self.container = container
        self.field = field
        self.value = value
        self.old_value = old_value

    def __repr__(self):
        if self.field == u'environment':
            return '\n'.join(self._get_environment_diffs(
                self.container,
                self.value,
                self.old_value,
            ))
        elif self.container:
            return u'Changed %s of container "%s" to: "%s" (was: "%s")' % (
                self.field,
                self.container,
                self.value,
                self.old_value
            )
        else:
            return u'Changed %s to: "%s" (was: "%s")' % (
                self.field,
                self.value,
                self.old_value
            )

    @staticmethod
    def _get_environment_diffs(container, env, old_env):
        msg = u'Changed environment "%s" of container "%s" to: "%s"'
        diffs = []
        for name, value in env.items():
            old_value = old_env.get(name)
            if value != old_value or not old_value:
                message = msg % (name, container, value)
                diffs.append(message)
        return diffs


class EcsAction(object):
    def __init__(self, client, cluster_name, service_name):
        self._client = client
        self._cluster_name = cluster_name
        self._service_name = service_name

        try:
            if service_name:
                self._service = self.get_service()
        except IndexError:
            raise EcsConnectionError(
                u'An error occurred when calling the DescribeServices '
                u'operation: Service not found.'
            )
        except ClientError as e:
            raise EcsConnectionError(str(e))
        except NoCredentialsError:
            raise EcsConnectionError(
                u'Unable to locate credentials. Configure credentials '
                u'by running "aws configure".'
            )

    def get_service(self):
        services_definition = self._client.describe_services(
            cluster_name=self._cluster_name,
            service_name=self._service_name
        )
        return EcsService(
            cluster=self._cluster_name,
            service_definition=services_definition[u'services'][0]
        )

    def get_current_task_definition(self, service):
        return self.get_task_definition(service.task_definition)

    def get_task_definition(self, task_definition):
        task_definition_payload = self._client.describe_task_definition(
            task_definition_arn=task_definition
        )

        task_definition = EcsTaskDefinition(
            **task_definition_payload[u'taskDefinition']
        )
        return task_definition

    def update_task_definition(self, task_definition):
        response = self._client.register_task_definition(
            family=task_definition.family,
            containers=task_definition.containers,
            volumes=task_definition.volumes,
            role_arn=task_definition.role_arn,
            additional_properties=task_definition.additional_properties
        )
        new_task_definition = EcsTaskDefinition(**response[u'taskDefinition'])
        return new_task_definition

    def deregister_task_definition(self, task_definition):
        self._client.deregister_task_definition(task_definition.arn)

    def update_service(self, service, desired_count=None):
        response = self._client.update_service(
            cluster=service.cluster,
            service=service.name,
            desired_count=desired_count,
            task_definition=service.task_definition
        )
        return EcsService(self._cluster_name, response[u'service'])

    def is_deployed(self, service):
        if len(service[u'deployments']) != 1:
            return False
        running_tasks = self._client.list_tasks(
            cluster_name=service.cluster,
            service_name=service.name
        )
        if not running_tasks[u'taskArns']:
            return service.desired_count == 0
        running_count = self.get_running_tasks_count(
            service=service,
            task_arns=running_tasks[u'taskArns']
        )
        return service.desired_count == running_count

    def get_running_tasks_count(self, service, task_arns):
        running_count = 0
        tasks_details = self._client.describe_tasks(
            cluster_name=self._cluster_name,
            task_arns=task_arns
        )
        for task in tasks_details[u'tasks']:
            arn = task[u'taskDefinitionArn']
            status = task[u'lastStatus']
            if arn == service.task_definition and status == u'RUNNING':
                running_count += 1
        return running_count

    @property
    def client(self):
        return self._client

    @property
    def service(self):
        return self._service

    @property
    def cluster_name(self):
        return self._cluster_name

    @property
    def service_name(self):
        return self._service_name


class DeployAction(EcsAction):
    def deploy(self, task_definition):
        try:
            self._service.set_task_definition(task_definition)
            return self.update_service(self._service)
        except ClientError as e:
            raise EcsError(str(e))


class ScaleAction(EcsAction):
    def scale(self, desired_count):
        try:
            return self.update_service(self._service, desired_count)
        except ClientError as e:
            raise EcsError(str(e))


class RunAction(EcsAction):
    def __init__(self, client, cluster_name):
        super(RunAction, self).__init__(client, cluster_name, None)
        self._client = client
        self._cluster_name = cluster_name
        self.started_tasks = []

    def run(self, task_definition, count, started_by):
        try:
            result = self._client.run_task(
                cluster=self._cluster_name,
                task_definition=task_definition.family_revision,
                count=count,
                started_by=started_by,
                overrides=dict(containerOverrides=task_definition.get_overrides())
            )
            self.started_tasks = result['tasks']
            return True
        except ClientError as e:
            raise EcsError(str(e))


class EcsError(Exception):
    pass


class EcsConnectionError(EcsError):
    pass


class UnknownContainerError(EcsError):
    pass


class TaskPlacementError(EcsError):
    pass


class UnknownTaskDefinitionError(EcsError):
    pass


1	1	from datetime import datetime
2
3	1	from boto3.session import Session
4	1	from botocore.exceptions import ClientError, NoCredentialsError
5	1	from dateutil.tz.tz import tzlocal
6
7
8	1	class EcsClient(object):
9	1	def __init__(self, access_key_id=None, secret_access_key=None,
10		region=None, profile=None):
11	1	session = Session(aws_access_key_id=access_key_id,
12		aws_secret_access_key=secret_access_key,
13		region_name=region,
14		profile_name=profile)
15	1	self.boto = session.client(u'ecs')
16
17	1	def describe_services(self, cluster_name, service_name):
18	1	return self.boto.describe_services(
19		cluster=cluster_name,
20		services=[service_name]
21		)
22
23	1	def describe_task_definition(self, task_definition_arn):
24	1	try:
25	1	return self.boto.describe_task_definition(
26		taskDefinition=task_definition_arn
27		)
28	1	except ClientError:
29	1	raise UnknownTaskDefinitionError(
30		u'Unknown task definition arn: %s' % task_definition_arn
31		)
32
33	1	def list_tasks(self, cluster_name, service_name):
34	1	return self.boto.list_tasks(
35		cluster=cluster_name,
36		serviceName=service_name
37		)
38
39	1	def describe_tasks(self, cluster_name, task_arns):
40	1	return self.boto.describe_tasks(cluster=cluster_name, tasks=task_arns)
41
42	1	def register_task_definition(self, family, containers, volumes, role_arn,
43		additional_properties):
44	1	return self.boto.register_task_definition(
45		family=family,
46		containerDefinitions=containers,
47		volumes=volumes,
48		taskRoleArn=role_arn,
49		**additional_properties
50		)
51
52	1	def deregister_task_definition(self, task_definition_arn):
53	1	return self.boto.deregister_task_definition(
54		taskDefinition=task_definition_arn
55		)
56
57	1	def update_service(self, cluster, service, desired_count, task_definition):
58	1	if desired_count is None:
59		return self.boto.update_service(
60		cluster=cluster,
61		service=service,
62		taskDefinition=task_definition
63		)
64	1	return self.boto.update_service(
65		cluster=cluster,
66		service=service,
67		desiredCount=desired_count,
68		taskDefinition=task_definition
69		)
70
71	1	def run_task(self, cluster, task_definition, count, started_by, overrides):
72	1	return self.boto.run_task(
73		cluster=cluster,
74		taskDefinition=task_definition,
75		count=count,
76		startedBy=started_by,
77		overrides=overrides
78		)
79
80
81	1	class EcsService(dict):
82	1	def __init__(self, cluster, service_definition=None, **kwargs):
83	1	self._cluster = cluster
84	1	super(EcsService, self).__init__(service_definition, **kwargs)
85
86	1	def set_task_definition(self, task_definition):
87	1	self[u'taskDefinition'] = task_definition.arn
88
89	1	@property
90		def cluster(self):
91	1	return self._cluster
92
93	1	@property
94		def name(self):
95	1	return self.get(u'serviceName')
96
97	1	@property
98		def task_definition(self):
99	1	return self.get(u'taskDefinition')
100
101	1	@property
102		def desired_count(self):
103	1	return self.get(u'desiredCount')
104
105	1	@property
106		def deployment_created_at(self):
107	1	for deployment in self.get(u'deployments'):
108	1	if deployment.get(u'status') == u'PRIMARY':
109	1	return deployment.get(u'createdAt')
110	1	return datetime.now()
111
112	1	@property
113		def deployment_updated_at(self):
114	1	for deployment in self.get(u'deployments'):
115	1	if deployment.get(u'status') == u'PRIMARY':
116	1	return deployment.get(u'updatedAt')
117	1	return datetime.now()
118
119	1	@property
120		def errors(self):
121	1	return self.get_warnings(
122		since=self.deployment_updated_at
123		)
124
125	1	@property
126		def older_errors(self):
127	1	return self.get_warnings(
128		since=self.deployment_created_at,
129		until=self.deployment_updated_at
130		)
131
132	1	def get_warnings(self, since=None, until=None):
133	1	since = since or self.deployment_created_at
134	1	until = until or datetime.now(tz=tzlocal())
135	1	errors = {}
136	1	for event in self.get(u'events'):
137	1	if u'unable' not in event[u'message']:
138		continue
139	1	if since < event[u'createdAt'] < until:
140	1	errors[event[u'createdAt']] = event[u'message']
141	1	return errors
142
143
144	1	class EcsTaskDefinition(object):
145	1	def __init__(self, containerDefinitions, volumes, family, revision,
146		status, taskDefinitionArn, requiresAttributes=None,
147		taskRoleArn=None, compatibilities=None, **kwargs):
148	1	self.containers = containerDefinitions
149	1	self.volumes = volumes
150	1	self.family = family
151	1	self.revision = revision
152	1	self.status = status
153	1	self.arn = taskDefinitionArn
154	1	self.requires_attributes = requiresAttributes or {}
155	1	self.role_arn = taskRoleArn or u''
156	1	self.additional_properties = kwargs
157	1	self._diff = []
158
159		# the compatibilities parameter is returned from the ECS API, when
160		# describing a task, but may not be included, when registering a new
161		# task definition. Just storing it for now.
162	1	self.compatibilities = compatibilities
163
164	1	@property
165		def container_names(self):
166	1	for container in self.containers:
167	1	yield container[u'name']
168
169	1	@property
170		def family_revision(self):
171	1	return '%s:%d' % (self.family, self.revision)
172
173	1	@property
174		def diff(self):
175	1	return self._diff
176
177	1	def get_overrides(self):
178	1	override = dict()
179	1	overrides = []
180	1	for diff in self.diff:
181	1	if override.get('name') != diff.container:
182	1	override = dict(name=diff.container)
183	1	overrides.append(override)
184	1	if diff.field == 'command':
185	1	override['command'] = self.get_overrides_command(diff.value)
186	1	elif diff.field == 'environment':
187	1	override['environment'] = self.get_overrides_env(diff.value)
188	1	return overrides
189
190	1	@staticmethod
191		def get_overrides_command(command):
192	1	return command.split(' ')
193
194	1	@staticmethod
195		def get_overrides_env(env):
196	1	return [{"name": e, "value": env[e]} for e in env]
197
198	1	def set_images(self, tag=None, **images):
199	1	self.validate_container_options(**images)
200	1	for container in self.containers:
201	1	if container[u'name'] in images:
202	1	new_image = images[container[u'name']]
203	1	diff = EcsTaskDefinitionDiff(
204		container=container[u'name'],
205		field=u'image',
206		value=new_image,
207		old_value=container[u'image']
208		)
209	1	self._diff.append(diff)
210	1	container[u'image'] = new_image
211	1	elif tag:
212	1	image_definition = container[u'image'].rsplit(u':', 1)
213	1	new_image = u'%s:%s' % (image_definition[0], tag.strip())
214	1	diff = EcsTaskDefinitionDiff(
215		container=container[u'name'],
216		field=u'image',
217		value=new_image,
218		old_value=container[u'image']
219		)
220	1	self._diff.append(diff)
221	1	container[u'image'] = new_image
222
223	1	def set_commands(self, **commands):
224	1	self.validate_container_options(**commands)
225	1	for container in self.containers:
226	1	if container[u'name'] in commands:
227	1	new_command = commands[container[u'name']]
228	1	diff = EcsTaskDefinitionDiff(
229		container=container[u'name'],
230		field=u'command',
231		value=new_command,
232		old_value=container.get(u'command')
233		)
234	1	self._diff.append(diff)
235	1	container[u'command'] = [new_command]
236
237	1	def set_environment(self, environment_list):
238	1	environment = {}
239
240	1	for env in environment_list:
241	1	environment.setdefault(env[0], {})
242	1	environment[env[0]][env[1]] = env[2]
243
244	1	self.validate_container_options(**environment)
245	1	for container in self.containers:
246	1	if container[u'name'] in environment:
247	1	self.apply_container_environment(
248		container=container,
249		new_environment=environment[container[u'name']]
250		)
251
252	1	def apply_container_environment(self, container, new_environment):
253	1	environment = container.get('environment', {})
254	1	old_environment = {env['name']: env['value'] for env in environment}
255	1	merged = old_environment.copy()
256	1	merged.update(new_environment)
257
258	1	if old_environment == merged:
259	1	return
260
261	1	diff = EcsTaskDefinitionDiff(
262		container=container[u'name'],
263		field=u'environment',
264		value=merged,
265		old_value=old_environment
266		)
267	1	self._diff.append(diff)
268
269	1	container[u'environment'] = [
270		{"name": e, "value": merged[e]} for e in merged
271		]
272
273	1	def validate_container_options(self, **container_options):
274	1	for container_name in container_options:
275	1	if container_name not in self.container_names:
276	1	raise UnknownContainerError(
277		u'Unknown container: %s' % container_name
278		)
279
280	1	def set_role_arn(self, role_arn):
281	1	if role_arn:
282	1	diff = EcsTaskDefinitionDiff(
283		container=None,
284		field=u'role_arn',
285		value=role_arn,
286		old_value=self.role_arn
287		)
288	1	self.role_arn = role_arn
289	1	self._diff.append(diff)
290
291
292	1	class EcsTaskDefinitionDiff(object):
293	1	def __init__(self, container, field, value, old_value):
294	1	self.container = container
295	1	self.field = field
296	1	self.value = value
297	1	self.old_value = old_value
298
299	1	def __repr__(self):
300	1	if self.field == u'environment':
301	1	return '\n'.join(self._get_environment_diffs(
302		self.container,
303		self.value,
304		self.old_value,
305		))
306	1	elif self.container:
307	1	return u'Changed %s of container "%s" to: "%s" (was: "%s")' % (
308		self.field,
309		self.container,
310		self.value,
311		self.old_value
312		)
313		else:
314	1	return u'Changed %s to: "%s" (was: "%s")' % (
315		self.field,
316		self.value,
317		self.old_value
318		)
319
320	1	@staticmethod
321		def _get_environment_diffs(container, env, old_env):
322	1	msg = u'Changed environment "%s" of container "%s" to: "%s"'
323	1	diffs = []
324	1	for name, value in env.items():
325	1	old_value = old_env.get(name)
326	1	if value != old_value or not old_value:
327	1	message = msg % (name, container, value)
328	1	diffs.append(message)
329	1	return diffs
330
331
332	1	class EcsAction(object):
333	1	def __init__(self, client, cluster_name, service_name):
334	1	self._client = client
335	1	self._cluster_name = cluster_name
336	1	self._service_name = service_name
337
338	1	try:
339	1	if service_name:
340	1	self._service = self.get_service()
341	1	except IndexError:
342	1	raise EcsConnectionError(
343		u'An error occurred when calling the DescribeServices '
344		u'operation: Service not found.'
345		)
346	1	except ClientError as e:
347	1	raise EcsConnectionError(str(e))
348	1	except NoCredentialsError:
349	1	raise EcsConnectionError(
350		u'Unable to locate credentials. Configure credentials '
351		u'by running "aws configure".'
352		)
353
354	1	def get_service(self):
355	1	services_definition = self._client.describe_services(
356		cluster_name=self._cluster_name,
357		service_name=self._service_name
358		)
359	1	return EcsService(
360		cluster=self._cluster_name,
361		service_definition=services_definition[u'services'][0]
362		)
363
364	1	def get_current_task_definition(self, service):
365	1	return self.get_task_definition(service.task_definition)
366
367	1	def get_task_definition(self, task_definition):
368	1	task_definition_payload = self._client.describe_task_definition(
369		task_definition_arn=task_definition
370		)
371
372	1	task_definition = EcsTaskDefinition(
373		**task_definition_payload[u'taskDefinition']
374		)
375	1	return task_definition
376
377	1	def update_task_definition(self, task_definition):
378	1	response = self._client.register_task_definition(
379		family=task_definition.family,
380		containers=task_definition.containers,
381		volumes=task_definition.volumes,
382		role_arn=task_definition.role_arn,
383		additional_properties=task_definition.additional_properties
384		)
385	1	new_task_definition = EcsTaskDefinition(**response[u'taskDefinition'])
386	1	return new_task_definition
387
388	1	def deregister_task_definition(self, task_definition):
389	1	self._client.deregister_task_definition(task_definition.arn)
390
391	1	def update_service(self, service, desired_count=None):
392	1	response = self._client.update_service(
393		cluster=service.cluster,
394		service=service.name,
395		desired_count=desired_count,
396		task_definition=service.task_definition
397		)
398	1	return EcsService(self._cluster_name, response[u'service'])
399
400	1	def is_deployed(self, service):
401	1	if len(service[u'deployments']) != 1:
402	1	return False
403	1	running_tasks = self._client.list_tasks(
404		cluster_name=service.cluster,
405		service_name=service.name
406		)
407	1	if not running_tasks[u'taskArns']:
408	1	return service.desired_count == 0
409	1	running_count = self.get_running_tasks_count(
410		service=service,
411		task_arns=running_tasks[u'taskArns']
412		)
413	1	return service.desired_count == running_count
414
415	1	def get_running_tasks_count(self, service, task_arns):
416	1	running_count = 0
417	1	tasks_details = self._client.describe_tasks(
418		cluster_name=self._cluster_name,
419		task_arns=task_arns
420		)
421	1	for task in tasks_details[u'tasks']:
422	1	arn = task[u'taskDefinitionArn']
423	1	status = task[u'lastStatus']
424	1	if arn == service.task_definition and status == u'RUNNING':
425	1	running_count += 1
426	1	return running_count
427
428	1	@property
429		def client(self):
430	1	return self._client
431
432	1	@property
433		def service(self):
434	1	return self._service
435
436	1	@property
437		def cluster_name(self):
438	1	return self._cluster_name
439
440	1	@property
441		def service_name(self):
442	1	return self._service_name
443
444
445	1	class DeployAction(EcsAction):
446	1	def deploy(self, task_definition):
447	1	try:
448	1	self._service.set_task_definition(task_definition)
449	1	return self.update_service(self._service)
450	1	except ClientError as e:
451	1	raise EcsError(str(e))
452
453
454	1	class ScaleAction(EcsAction):
455	1	def scale(self, desired_count):
456	1	try:
457	1	return self.update_service(self._service, desired_count)
458	1	except ClientError as e:
459	1	raise EcsError(str(e))
460
461
462	1	class RunAction(EcsAction):
463	1	def __init__(self, client, cluster_name):
464	1	super(RunAction, self).__init__(client, cluster_name, None)
465	1	self._client = client
466	1	self._cluster_name = cluster_name
467	1	self.started_tasks = []
468
469	1	def run(self, task_definition, count, started_by):
470	1	try:
471	1	result = self._client.run_task(
472		cluster=self._cluster_name,
473		task_definition=task_definition.family_revision,
474		count=count,
475		started_by=started_by,
476		overrides=dict(containerOverrides=task_definition.get_overrides())
477		)
478	1	self.started_tasks = result['tasks']
479	1	return True
480	1	except ClientError as e:
481	1	raise EcsError(str(e))
482
483
484	1	class EcsError(Exception):
485	1	pass
486
487
488	1	class EcsConnectionError(EcsError):
489	1	pass
490
491
492	1	class UnknownContainerError(EcsError):
493	1	pass
494
495
496	1	class TaskPlacementError(EcsError):
497	1	pass
498
499
500	1	class UnknownTaskDefinitionError(EcsError):
501		pass
502

fabfuel / ecs-deploy

Branch — develop (de6256)

ecs_deploy.ecs.EcsAction.is_deployed() A

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