airflow.providers.amazon.aws.log.s3_task_handler

Module Contents

Classes

S3TaskHandler

S3TaskHandler is a python log handler that handles and reads task instance logs.
class airflow.providers.amazon.aws.log.s3_task_handler.S3TaskHandler(base_log_folder, s3_log_folder, filename_template=None, **kwargs)[source]

Bases: airflow.utils.log.file_task_handler.FileTaskHandler, airflow.utils.log.logging_mixin.LoggingMixin

S3TaskHandler is a python log handler that handles and reads task instance logs.

It extends airflow FileTaskHandler and uploads to and reads from S3 remote storage.

trigger_should_wrap = True[source]
hook()[source]

Returns S3Hook.

set_context(ti, *, identifier=None)[source]

Provide task_instance context to airflow task handler.

Generally speaking returns None. But if attr maintain_propagate has been set to propagate, then returns sentinel MAINTAIN_PROPAGATE. This has the effect of overriding the default behavior to set propagate to False whenever set_context is called. At time of writing, this functionality is only used in unit testing.

Parameters

  • ti (airflow.models.taskinstance.TaskInstance) – task instance object

  • identifier (str | None) – if set, adds suffix to log file. For use when relaying exceptional messages to task logs from a context other than task or trigger run

close()[source]

Close and upload local log file to remote storage S3.

s3_log_exists(remote_log_location)[source]

Check if remote_log_location exists in remote storage.

Parameters

remote_log_location (str) – log’s location in remote storage

Returns

True if location exists else False

Return type

bool

s3_read(remote_log_location, return_error=False)[source]

Return the log found at the remote_log_location or ‘’ if no logs are found or there is an error.

Parameters

  • remote_log_location (str) – the log’s location in remote storage

  • return_error (bool) – if True, returns a string error message if an error occurs. Otherwise returns ‘’ when an error occurs.

Returns

the log found at the remote_log_location

Return type

str

s3_write(log, remote_log_location, append=True, max_retry=1)[source]

Write the log to the remote_log_location; return True or fails silently and return False.

Parameters

  • log (str) – the log to write to the remote_log_location

  • remote_log_location (str) – the log’s location in remote storage

  • append (bool) – if False, any existing log file is overwritten. If True, the new log is appended to any existing logs.

  • max_retry (int) – Maximum number of times to retry on upload failure

Returns

whether the log is successfully written to remote location or not.

Return type

bool

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