EcsTaskDefinitionDiff._get_environment_diffs() - Code Metrics - Inspection of "Merge pull request #28 from fabfuel/feature/only-p..." - fabfuel/ecs-deploy - Measure and Improve Code Quality continuously with Scrutinizer

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Push — develop ( 185a3d...98300d )

by Fabian

created 2017-09-20 05:14 UTC

EcsTaskDefinitionDiff._get_environment_diffs() A

↳ Parent: EcsTaskDefinitionDiff

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	4

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	10
ccs	9
cts	9
cp	1
rs	9.2
cc	4
crap	4

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):
        return self.boto.register_task_definition(
            family=family,
            containerDefinitions=containers,
            volumes=volumes,
            taskRoleArn=role_arn or u''
        )

    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):
        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_desired_count(self, desired_count):
        self[u'desiredCount'] = desired_count

    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(dict):
    def __init__(self, task_definition=None, **kwargs):
        super(EcsTaskDefinition, self).__init__(task_definition, **kwargs)
        self._diff = []

    @property
    def containers(self):
        return self.get(u'containerDefinitions')

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

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

    @property
    def arn(self):
        return self.get(u'taskDefinitionArn')

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

    @property
    def role_arn(self):
        return self.get(u'taskRoleArn')

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

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

        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[u'taskRoleArn']
            )
            self[u'taskRoleArn'] = 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):
        task_definition_payload = self._client.describe_task_definition(
            task_definition_arn=service.task_definition
        )
        task_definition = EcsTaskDefinition(
            task_definition=task_definition_payload[u'taskDefinition']
        )
        return 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=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
        )
        new_task_definition = EcsTaskDefinition(response[u'taskDefinition'])
        self._client.deregister_task_definition(task_definition.arn)
        return new_task_definition

    def update_service(self, service):
        response = self._client.update_service(
            cluster=service.cluster,
            service=service.name,
            desired_count=service.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):
        self._service.set_task_definition(task_definition)
        return self.update_service(self._service)


class ScaleAction(EcsAction):
    def scale(self, desired_count):
        self._service.set_desired_count(desired_count)
        return self.update_service(self._service)


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):
        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


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	1		return self.boto.register_task_definition(
44			family=family,
45			containerDefinitions=containers,
46			volumes=volumes,
47			taskRoleArn=role_arn or u''
48			)
49
50	1		def deregister_task_definition(self, task_definition_arn):
51	1		return self.boto.deregister_task_definition(
52			taskDefinition=task_definition_arn
53			)
54
55	1		def update_service(self, cluster, service, desired_count, task_definition):
56	1		return self.boto.update_service(
57			cluster=cluster,
58			service=service,
59			desiredCount=desired_count,
60			taskDefinition=task_definition
61			)
62
63	1		def run_task(self, cluster, task_definition, count, started_by, overrides):
64	1		return self.boto.run_task(
65			cluster=cluster,
66			taskDefinition=task_definition,
67			count=count,
68			startedBy=started_by,
69			overrides=overrides
70			)
71
72
73	1		class EcsService(dict):
74	1		def __init__(self, cluster, service_definition=None, **kwargs):
75	1		self._cluster = cluster
76	1		super(EcsService, self).__init__(service_definition, **kwargs)
77
78	1		def set_desired_count(self, desired_count):
79	1		self[u'desiredCount'] = desired_count
80
81	1		def set_task_definition(self, task_definition):
82	1		self[u'taskDefinition'] = task_definition.arn
83
84	1		@property
85			def cluster(self):
86	1		return self._cluster
87
88	1		@property
89			def name(self):
90	1		return self.get(u'serviceName')
91
92	1		@property
93			def task_definition(self):
94	1		return self.get(u'taskDefinition')
95
96	1		@property
97			def desired_count(self):
98	1		return self.get(u'desiredCount')
99
100	1		@property
101			def deployment_created_at(self):
102	1		for deployment in self.get(u'deployments'):
103	1		if deployment.get(u'status') == u'PRIMARY':
104	1		return deployment.get(u'createdAt')
105	1		return datetime.now()
106
107	1		@property
108			def deployment_updated_at(self):
109	1		for deployment in self.get(u'deployments'):
110	1		if deployment.get(u'status') == u'PRIMARY':
111	1		return deployment.get(u'updatedAt')
112	1		return datetime.now()
113
114	1		@property
115			def errors(self):
116	1		return self.get_warnings(
117			since=self.deployment_updated_at
118			)
119
120	1		@property
121			def older_errors(self):
122	1		return self.get_warnings(
123			since=self.deployment_created_at,
124			until=self.deployment_updated_at
125			)
126
127	1		def get_warnings(self, since=None, until=None):
128	1		since = since or self.deployment_created_at
129	1		until = until or datetime.now(tz=tzlocal())
130	1		errors = {}
131	1		for event in self.get(u'events'):
132	1		if u'unable' not in event[u'message']:
133			continue
134	1		if since < event[u'createdAt'] < until:
135	1		errors[event[u'createdAt']] = event[u'message']
136	1		return errors
137
138
139	1		class EcsTaskDefinition(dict):
140	1		def __init__(self, task_definition=None, **kwargs):
141	1		super(EcsTaskDefinition, self).__init__(task_definition, **kwargs)
142	1		self._diff = []
143
144	1		@property
145			def containers(self):
146	1		return self.get(u'containerDefinitions')
147
148	1		@property
149			def container_names(self):
150	1		for container in self.get(u'containerDefinitions'):
151	1		yield container[u'name']
152
153	1		@property
154			def volumes(self):
155	1		return self.get(u'volumes')
156
157	1		@property
158			def arn(self):
159	1		return self.get(u'taskDefinitionArn')
160
161	1		@property
162			def family(self):
163	1		return self.get(u'family')
164
165	1		@property
166			def role_arn(self):
167	1		return self.get(u'taskRoleArn')
168
169	1		@property
170			def revision(self):
171	1		return self.get(u'revision')
172
173	1		@property
174			def family_revision(self):
175	1		return '%s:%d' % (self.get(u'family'), self.get(u'revision'))
176
177	1		@property
178			def diff(self):
179	1		return self._diff
180
181	1		def get_overrides(self):
182	1		override = dict()
183	1		overrides = []
184	1		for diff in self.diff:
185	1		if override.get('name') != diff.container:
186	1		override = dict(name=diff.container)
187	1		overrides.append(override)
188	1		if diff.field == 'command':
189	1		override['command'] = self.get_overrides_command(diff.value)
190	1		elif diff.field == 'environment':
191	1		override['environment'] = self.get_overrides_env(diff.value)
192	1		return overrides
193
194	1		@staticmethod
195			def get_overrides_command(command):
196	1		return command.split(' ')
197
198	1		@staticmethod
199			def get_overrides_env(env):
200	1		return [{"name": e, "value": env[e]} for e in env]
201
202	1		def set_images(self, tag=None, **images):
203	1		self.validate_container_options(**images)
204	1		for container in self.containers:
205	1		if container[u'name'] in images:
206	1		new_image = images[container[u'name']]
207	1		diff = EcsTaskDefinitionDiff(
208			container=container[u'name'],
209			field=u'image',
210			value=new_image,
211			old_value=container[u'image']
212			)
213	1		self._diff.append(diff)
214	1		container[u'image'] = new_image
215	1		elif tag:
216	1	View Code Duplication	image_definition = container[u'image'].rsplit(u':', 1)
			0 ignored issues – show Duplication introduced 2017-09-17 17:04 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
217	1		new_image = u'%s:%s' % (image_definition[0], tag.strip())
218	1		diff = EcsTaskDefinitionDiff(
219			container=container[u'name'],
220			field=u'image',
221			value=new_image,
222			old_value=container[u'image']
223			)
224	1		self._diff.append(diff)
225	1		container[u'image'] = new_image
226
227	1		def set_commands(self, **commands):
228	1		self.validate_container_options(**commands)
229	1		for container in self.containers:
230	1		if container[u'name'] in commands:
231	1	View Code Duplication	new_command = commands[container[u'name']]
			0 ignored issues – show Duplication introduced 2017-09-17 17:04 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
232	1		diff = EcsTaskDefinitionDiff(
233			container=container[u'name'],
234			field=u'command',
235			value=new_command,
236			old_value=container.get(u'command')
237			)
238	1		self._diff.append(diff)
239	1		container[u'command'] = [new_command]
240
241	1		def set_environment(self, environment_list):
242	1		environment = {}
243
244	1		for env in environment_list:
245	1		environment.setdefault(env[0], {})
246	1		environment[env[0]][env[1]] = env[2]
247
248	1		self.validate_container_options(**environment)
249	1		for container in self.containers:
250	1		if container[u'name'] in environment:
251	1		self.apply_container_environment(
252			container=container,
253			new_environment=environment[container[u'name']]
254			)
255
256	1		def apply_container_environment(self, container, new_environment):
257	1		environment = container.get('environment', {})
258	1		old_environment = {env['name']: env['value'] for env in environment}
259	1		merged = old_environment.copy()
260	1		merged.update(new_environment)
261
262	1		diff = EcsTaskDefinitionDiff(
263			container=container[u'name'],
264			field=u'environment',
265			value=merged,
266			old_value=old_environment
267			)
268	1		self._diff.append(diff)
269
270	1		container[u'environment'] = [
271			{"name": e, "value": merged[e]} for e in merged
272			]
273
274	1		def validate_container_options(self, **container_options):
275	1		for container_name in container_options:
276	1		if container_name not in self.container_names:
277	1		raise UnknownContainerError(
278			u'Unknown container: %s' % container_name
279			)
280
281	1		def set_role_arn(self, role_arn):
282	1		if role_arn:
283	1		diff = EcsTaskDefinitionDiff(
284			container=None,
285			field=u'role_arn',
286			value=role_arn,
287			old_value=self[u'taskRoleArn']
288			)
289	1		self[u'taskRoleArn'] = role_arn
290	1		self._diff.append(diff)
291
292
293	1		class EcsTaskDefinitionDiff(object):
294	1		def __init__(self, container, field, value, old_value):
295	1		self.container = container
296	1		self.field = field
297	1		self.value = value
298	1		self.old_value = old_value
299
300	1		def __repr__(self):
301	1		if self.field == u'environment':
302	1		return '\n'.join(self._get_environment_diffs(
303			self.container,
304			self.value,
305			self.old_value,
306			))
307	1		elif self.container:
308	1		return u'Changed %s of container "%s" to: "%s" (was: "%s")' % (
309			self.field,
310			self.container,
311			self.value,
312			self.old_value
313			)
314			else:
315	1		return u'Changed %s to: "%s" (was: "%s")' % (
316			self.field,
317			self.value,
318			self.old_value
319			)
320
321	1		@staticmethod
322			def _get_environment_diffs(container, env, old_env):
323	1		msg = u'Changed environment "%s" of container "%s" to: "%s"'
324	1		diffs = []
325	1		for name, value in env.items():
326	1		old_value = old_env.get(name)
327	1		if value != old_value or not old_value:
328	1		message = msg % (name, container, value)
329	1		diffs.append(message)
330	1		return diffs
331
332
333	1		class EcsAction(object):
334	1		def __init__(self, client, cluster_name, service_name):
335	1		self._client = client
336	1		self._cluster_name = cluster_name
337	1		self._service_name = service_name
338
339	1		try:
340	1		if service_name:
341	1		self._service = self.get_service()
342	1		except IndexError:
343	1		raise EcsConnectionError(
344			u'An error occurred when calling the DescribeServices '
345			u'operation: Service not found.'
346			)
347	1		except ClientError as e:
348	1		raise EcsConnectionError(str(e))
349	1		except NoCredentialsError:
350	1		raise EcsConnectionError(
351			u'Unable to locate credentials. Configure credentials '
352			u'by running "aws configure".'
353			)
354
355	1		def get_service(self):
356	1		services_definition = self._client.describe_services(
357			cluster_name=self._cluster_name,
358			service_name=self._service_name
359			)
360	1		return EcsService(
361			cluster=self._cluster_name,
362			service_definition=services_definition[u'services'][0]
363			)
364
365	1		def get_current_task_definition(self, service):
366	1		task_definition_payload = self._client.describe_task_definition(
367			task_definition_arn=service.task_definition
368			)
369	1		task_definition = EcsTaskDefinition(
370			task_definition=task_definition_payload[u'taskDefinition']
371			)
372	1		return task_definition
373
374	1		def get_task_definition(self, task_definition):
375	1		task_definition_payload = self._client.describe_task_definition(
376			task_definition_arn=task_definition
377			)
378	1		task_definition = EcsTaskDefinition(
379			task_definition=task_definition_payload[u'taskDefinition']
380			)
381	1		return task_definition
382
383	1		def update_task_definition(self, task_definition):
384	1		response = self._client.register_task_definition(
385			family=task_definition.family,
386			containers=task_definition.containers,
387			volumes=task_definition.volumes,
388			role_arn=task_definition.role_arn
389			)
390	1		new_task_definition = EcsTaskDefinition(response[u'taskDefinition'])
391	1		self._client.deregister_task_definition(task_definition.arn)
392	1		return new_task_definition
393
394	1		def update_service(self, service):
395	1		response = self._client.update_service(
396			cluster=service.cluster,
397			service=service.name,
398			desired_count=service.desired_count,
399			task_definition=service.task_definition
400			)
401	1		return EcsService(self._cluster_name, response[u'service'])
402
403	1		def is_deployed(self, service):
404	1		if len(service[u'deployments']) != 1:
405	1		return False
406	1		running_tasks = self._client.list_tasks(
407			cluster_name=service.cluster,
408			service_name=service.name
409			)
410	1		if not running_tasks[u'taskArns']:
411	1		return service.desired_count == 0
412	1		running_count = self.get_running_tasks_count(
413			service=service,
414			task_arns=running_tasks[u'taskArns']
415			)
416	1		return service.desired_count == running_count
417
418	1		def get_running_tasks_count(self, service, task_arns):
419	1		running_count = 0
420	1		tasks_details = self._client.describe_tasks(
421			cluster_name=self._cluster_name,
422			task_arns=task_arns
423			)
424	1		for task in tasks_details[u'tasks']:
425	1		arn = task[u'taskDefinitionArn']
426	1		status = task[u'lastStatus']
427	1		if arn == service.task_definition and status == u'RUNNING':
428	1		running_count += 1
429	1		return running_count
430
431	1		@property
432			def client(self):
433	1		return self._client
434
435	1		@property
436			def service(self):
437	1		return self._service
438
439	1		@property
440			def cluster_name(self):
441	1		return self._cluster_name
442
443	1		@property
444			def service_name(self):
445	1		return self._service_name
446
447
448	1		class DeployAction(EcsAction):
449	1		def deploy(self, task_definition):
450	1		self._service.set_task_definition(task_definition)
451	1		return self.update_service(self._service)
452
453
454	1		class ScaleAction(EcsAction):
455	1		def scale(self, desired_count):
456	1		self._service.set_desired_count(desired_count)
457	1		return self.update_service(self._service)
458
459
460	1		class RunAction(EcsAction):
461	1		def __init__(self, client, cluster_name):
462	1		super(RunAction, self).__init__(client, cluster_name, None)
463	1		self._client = client
464	1		self._cluster_name = cluster_name
465	1		self.started_tasks = []
466
467	1		def run(self, task_definition, count, started_by):
468	1		result = self._client.run_task(
469			cluster=self._cluster_name,
470			task_definition=task_definition.family_revision,
471			count=count,
472			started_by=started_by,
473			overrides=dict(containerOverrides=task_definition.get_overrides())
474			)
475	1		self.started_tasks = result['tasks']
476	1		return True
477
478
479	1		class EcsError(Exception):
480	1		pass
481
482
483	1		class EcsConnectionError(EcsError):
484	1		pass
485
486
487	1		class UnknownContainerError(EcsError):
488	1		pass
489
490
491	1		class TaskPlacementError(EcsError):
492	1		pass
493
494
495	1		class UnknownTaskDefinitionError(EcsError):
496			pass
497

fabfuel / ecs-deploy

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