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Example Airflow DAG for Google Cloud Storage to SFTP transfer operators.
from __future__ import annotations

import os
from datetime import datetime
from pathlib import Path

from airflow.models.baseoperator import chain
from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from import GCSCreateBucketOperator, GCSDeleteBucketOperator
from import SFTPToGCSOperator
from airflow.utils.trigger_rule import TriggerRule

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT")
[docs]DAG_ID = "example_sftp_to_gcs"
[docs]BUCKET_NAME = f"bucket-{DAG_ID}-{ENV_ID}"
[docs]TMP_PATH = "tmp"
[docs]DIR = "tests_sftp_hook_dir"
[docs]SUBDIR = "subdir"
[docs]OBJECT_SRC_1 = "parent-1.bin"
[docs]OBJECT_SRC_2 = "parent-2.bin"
[docs]CURRENT_FOLDER = Path(__file__).parent
[docs]LOCAL_PATH = str(Path(CURRENT_FOLDER) / "resources")
[docs]FILE_NAME = "tmp.tar.gz"
with DAG( DAG_ID, schedule="@once", start_date=datetime(2021, 1, 1), catchup=False, ) as dag:
[docs] create_bucket = GCSCreateBucketOperator(task_id="create_bucket", bucket_name=BUCKET_NAME)
unzip_file = BashOperator( task_id="unzip_data_file", bash_command=f"tar xvf {LOCAL_PATH}/{FILE_NAME} -C {LOCAL_PATH}" ) # [START howto_operator_sftp_to_gcs_copy_single_file] copy_file_from_sftp_to_gcs = SFTPToGCSOperator( task_id="file-copy-sftp-to-gcs", source_path=f"{FILE_LOCAL_PATH}/{OBJECT_SRC_1}", destination_bucket=BUCKET_NAME, ) # [END howto_operator_sftp_to_gcs_copy_single_file] # [START howto_operator_sftp_to_gcs_move_single_file_destination] move_file_from_sftp_to_gcs_destination = SFTPToGCSOperator( task_id="file-move-sftp-to-gcs-destination", source_path=f"{FILE_LOCAL_PATH}/{OBJECT_SRC_2}", destination_bucket=BUCKET_NAME, destination_path="destination_dir/destination_filename.bin", move_object=True, ) # [END howto_operator_sftp_to_gcs_move_single_file_destination] # [START howto_operator_sftp_to_gcs_copy_directory] copy_directory_from_sftp_to_gcs = SFTPToGCSOperator( task_id="dir-copy-sftp-to-gcs", source_path=f"{FILE_LOCAL_PATH}/{SUBDIR}/*", destination_bucket=BUCKET_NAME, ) # [END howto_operator_sftp_to_gcs_copy_directory] # [START howto_operator_sftp_to_gcs_move_specific_files] move_specific_files_from_sftp_to_gcs = SFTPToGCSOperator( task_id="dir-move-specific-files-sftp-to-gcs", source_path=f"{FILE_LOCAL_PATH}/{SUBDIR}/*.bin", destination_bucket=BUCKET_NAME, destination_path="specific_files/", move_object=True, ) # [END howto_operator_sftp_to_gcs_move_specific_files] delete_bucket = GCSDeleteBucketOperator( task_id="delete_bucket", bucket_name=BUCKET_NAME, trigger_rule=TriggerRule.ALL_DONE ) chain( # TEST SETUP create_bucket, unzip_file, # TEST BODY copy_file_from_sftp_to_gcs, move_file_from_sftp_to_gcs_destination, copy_directory_from_sftp_to_gcs, move_specific_files_from_sftp_to_gcs, # TEST TEARDOWN delete_bucket, ) from tests.system.utils.watcher import watcher # This test needs watcher in order to properly mark success/failure # when "tearDown" task with trigger rule is part of the DAG list(dag.tasks) >> watcher() from tests.system.utils import get_test_run # noqa: E402 # Needed to run the example DAG with pytest (see: tests/system/
[docs]test_run = get_test_run(dag)

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