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from __future__ import annotations

import time
from collections import deque
from datetime import datetime, timedelta
from logging import Logger
from threading import Event, Thread
from typing import Generator

from botocore.exceptions import ClientError, ConnectionClosedError
from botocore.waiter import Waiter

from import EcsOperatorError, EcsTaskFailToStart
from import AwsGenericHook
from import AwsLogsHook
from import _StringCompareEnum
from airflow.typing_compat import Protocol, runtime_checkable

[docs]def should_retry(exception: Exception): """Check if exception is related to ECS resource quota (CPU, MEM).""" if isinstance(exception, EcsOperatorError): return any( quota_reason in failure["reason"] for quota_reason in ["RESOURCE:MEMORY", "RESOURCE:CPU"] for failure in exception.failures ) return False
[docs]def should_retry_eni(exception: Exception): """Check if exception is related to ENI (Elastic Network Interfaces).""" if isinstance(exception, EcsTaskFailToStart): return any( eni_reason in exception.message for eni_reason in ["network interface provisioning", "ResourceInitializationError"] ) return False
[docs]class EcsClusterStates(_StringCompareEnum): """Contains the possible State values of an ECS Cluster."""
[docs] ACTIVE = "ACTIVE"
[docs] FAILED = "FAILED"
[docs]class EcsTaskDefinitionStates(_StringCompareEnum): """Contains the possible State values of an ECS Task Definition."""
[docs] ACTIVE = "ACTIVE"
[docs]class EcsTaskStates(_StringCompareEnum): """Contains the possible State values of an ECS Task."""
[docs] NONE = "NONE"
[docs]class EcsHook(AwsGenericHook): """ Interact with Amazon Elastic Container Service (ECS). Provide thin wrapper around :external+boto3:py:class:`boto3.client("ecs") <ECS.Client>`. Additional arguments (such as ``aws_conn_id``) may be specified and are passed down to the underlying AwsBaseHook. .. seealso:: - :class:`` - `Amazon Elastic Container Service \ <>`__ """ def __init__(self, *args, **kwargs) -> None: kwargs["client_type"] = "ecs" super().__init__(*args, **kwargs)
[docs] def get_cluster_state(self, cluster_name: str) -> str: """ Get ECS Cluster state. .. seealso:: - :external+boto3:py:meth:`ECS.Client.describe_clusters` :param cluster_name: ECS Cluster name or full cluster Amazon Resource Name (ARN) entry. """ return self.conn.describe_clusters(clusters=[cluster_name])["clusters"][0]["status"]
[docs] def get_task_definition_state(self, task_definition: str) -> str: """ Get ECS Task Definition state. .. seealso:: - :external+boto3:py:meth:`ECS.Client.describe_task_definition` :param task_definition: The family for the latest ACTIVE revision, family and revision ( family:revision ) for a specific revision in the family, or full Amazon Resource Name (ARN) of the task definition to describe. """ return self.conn.describe_task_definition(taskDefinition=task_definition)["taskDefinition"]["status"]
[docs] def get_task_state(self, cluster, task) -> str: """ Get ECS Task state. .. seealso:: - :external+boto3:py:meth:`ECS.Client.describe_tasks` :param cluster: The short name or full Amazon Resource Name (ARN) of the cluster that hosts the task or tasks to describe. :param task: Task ID or full ARN entry. """ return self.conn.describe_tasks(cluster=cluster, tasks=[task])["tasks"][0]["lastStatus"]
[docs]class EcsTaskLogFetcher(Thread): """ Fetches Cloudwatch log events with specific interval as a thread and sends the log events to the info channel of the provided logger. """ def __init__( self, *, log_group: str, log_stream_name: str, fetch_interval: timedelta, logger: Logger, aws_conn_id: str | None = "aws_default", region_name: str | None = None, ): super().__init__() self._event = Event() self.fetch_interval = fetch_interval self.logger = logger self.log_group = log_group self.log_stream_name = log_stream_name self.hook = AwsLogsHook(aws_conn_id=aws_conn_id, region_name=region_name)
[docs] def run(self) -> None: logs_to_skip = 0 while not self.is_stopped(): time.sleep(self.fetch_interval.total_seconds()) log_events = self._get_log_events(logs_to_skip) for log_event in log_events: logs_to_skip += 1
def _get_log_events(self, skip: int = 0) -> Generator: try: yield from self.hook.get_log_events(self.log_group, self.log_stream_name, skip=skip) except ClientError as error: if error.response["Error"]["Code"] != "ResourceNotFoundException": self.logger.warning("Error on retrieving Cloudwatch log events", error) yield from () except ConnectionClosedError as error: self.logger.warning("ConnectionClosedError on retrieving Cloudwatch log events", error) yield from () def _event_to_str(self, event: dict) -> str: event_dt = datetime.utcfromtimestamp(event["timestamp"] / 1000.0) formatted_event_dt = event_dt.strftime("%Y-%m-%d %H:%M:%S,%f")[:-3] message = event["message"] return f"[{formatted_event_dt}] {message}"
[docs] def get_last_log_messages(self, number_messages) -> list: return [log["message"] for log in deque(self._get_log_events(), maxlen=number_messages)]
[docs] def get_last_log_message(self) -> str | None: try: return self.get_last_log_messages(1)[0] except IndexError: return None
[docs] def is_stopped(self) -> bool: return self._event.is_set()
[docs] def stop(self): self._event.set()
[docs]class EcsProtocol(Protocol): """ A structured Protocol for ``boto3.client('ecs')``. This is used for type hints on :py:meth:`.EcsOperator.client`. .. seealso:: - - """
[docs] def run_task(self, **kwargs) -> dict: """""" # noqa: E501 ...
[docs] def get_waiter(self, x: str) -> Waiter: """""" # noqa: E501 ...
[docs] def describe_tasks(self, cluster: str, tasks) -> dict: """""" # noqa: E501 ...
[docs] def stop_task(self, cluster, task, reason: str) -> dict: """""" # noqa: E501 ...
[docs] def describe_task_definition(self, taskDefinition: str) -> dict: """""" # noqa: E501 ...
[docs] def list_tasks(self, cluster: str, launchType: str, desiredStatus: str, family: str) -> dict: """""" # noqa: E501 ...

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