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From "dmtran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AIRFLOW-96) s3_conn_id of s3KeySensor cannot be defined using an environment variable
Date Tue, 10 May 2016 15:25:13 GMT
dmtran created AIRFLOW-96:
-----------------------------

             Summary: s3_conn_id of s3KeySensor cannot be defined using an environment variable
                 Key: AIRFLOW-96
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-96
             Project: Apache Airflow
          Issue Type: Bug
          Components: operators
    Affects Versions: Airflow 1.6.2
         Environment:     Python Version: 2.7.11
    Operating System: OS X El Capitan 10.11.4

            Reporter: dmtran
            Priority: Minor


According to https://pythonhosted.org/airflow/concepts.html#connections, Airflow has the ability
to reference connections via environment variables from the operating system. The environment
variable needs to be prefixed with AIRFLOW_CONN_ to be considered a connection.

This doesn't work with an S3KeySensor, the following exception is raised:

{noformat}
[2016-05-10 17:01:37,101] {models.py:1041} ERROR - conn_id doesn't exist in the repository
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 1000, in run
    result = task_copy.execute(context=context)
  File "/usr/local/lib/python2.7/site-packages/airflow/operators/python_operator.py", line
65, in execute
    return_value = self.python_callable(*self.op_args, **self.op_kwargs)
  File "/Users/dmtran/git_repos/coordinator/airflow/dags/test-s3.py", line 24, in check_key_in_s3
    s3_conn_id='S3_CONNECTION')
  File "/usr/local/lib/python2.7/site-packages/airflow/utils.py", line 461, in wrapper
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/airflow/operators/sensors.py", line 332, in
__init__
    raise AirflowException("conn_id doesn't exist in the repository")
AirflowException: conn_id doesn't exist in the repository
{noformat}

You can reproduce this issue by triggering a DAGrun of the following DAG:
{code}
from airflow.hooks.base_hook import CONN_ENV_PREFIX
from airflow.operators import *
from airflow.models import DAG
from datetime import datetime
import os

args = {
    'owner': 'airflow',
    'start_date': datetime(2016, 5, 10, 7)
}

dag = DAG(dag_id='test-s3',
    default_args=args,
    schedule_interval=None)

def check_key_in_s3(**context):
    os.environ[CONN_ENV_PREFIX + 'S3_CONNECTION'] = '{ "aws_access_key_id": "dummyAccessKey",
 "aws_secret_access_key": "dummySecretKey" }'
    sensor = S3KeySensor(
        task_id='s3keysensor',
        bucket_name='dummy_bucket',
        bucket_key='dummy_key',
        dag=dag,
        s3_conn_id='S3_CONNECTION')
    sensor.execute(context)

check_s3_key_operator = PythonOperator(
    task_id='check_key_in_s3',
    python_callable=check_key_in_s3,
    provide_context=True,
    dag=dag)
{code}

The exception is raised because of the following lines in method __init__ of class S3KeySensor:
{code}
        db = session.query(DB).filter(DB.conn_id == s3_conn_id).first()
        if not db:
            raise AirflowException("conn_id doesn't exist in the repository")
{code}



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