10

我正在试验数据管道的气流。不幸的是，到目前为止，我无法让它与 bigquery 运算符一起使用。我已经尽我所能寻找解决方案，但我仍然卡住了。我正在使用本地运行的顺序执行器。

这是我的代码：

from airflow import DAG
from airflow.contrib.operators.bigquery_operator import BigQueryOperator
from datetime import datetime, timedelta

default_args = {
    'owner': 'airflow',
    'depends_on_past': False,
    'start_date': datetime(2015, 6, 1),
    'email': ['example@gmail.com'],
    'email_on_failure': False,
    'email_on_retry': False,
    'retries': 1,
    'retry_delay': timedelta(minutes=5),
    # 'queue': 'bash_queue',
    # 'pool': 'backfill',
    # 'priority_weight': 10,
    # 'end_date': datetime(2016, 1, 1),
}

dag = DAG(
    dag_id='bigQueryPipeline', 
    default_args=default_args, 
    schedule_interval=timedelta(1)
)

t1 = BigQueryOperator(
    task_id='bigquery_test',
    bql='SELECT COUNT(userId) FROM [events:EVENTS_20160501]',
    destination_dataset_table=False,
    bigquery_conn_id='bigquery_default',
    delegate_to=False,
    udf_config=False,
    dag=dag,
)

错误信息：

[2016-08-27 00:13:14,665] {models.py:1327} ERROR - 'project'
Traceback (most recent call last):
  File "/Users/jean.rodrigue/anaconda/bin/airflow", line 15, in <module>
    args.func(args)
  File "/Users/jean.rodrigue/anaconda/lib/python2.7/site-packages/airflow/bin/cli.py", line 352, in test
    ti.run(force=True, ignore_dependencies=True, test_mode=True)
  File "/Users/jean.rodrigue/anaconda/lib/python2.7/site-packages/airflow/utils/db.py", line 53, in wrapper
    result = func(*args, **kwargs)
  File "/Users/jean.rodrigue/anaconda/lib/python2.7/site-packages/airflow/models.py", line 1245, in run
    result = task_copy.execute(context=context)
  File "/Users/jean.rodrigue/anaconda/lib/python2.7/site-packages/airflow/contrib/operators/bigquery_operator.py", line 57, in execute
    conn = hook.get_conn()
  File "/Users/jean.rodrigue/anaconda/lib/python2.7/site-packages/airflow/contrib/hooks/bigquery_hook.py", line 54, in get_conn
    project = connection_extras['project']
4

3 回答 3

11

我花了一段时间才终于找到它，因为它没有很清楚地记录在案。在气流 UI 中，转到管理 -> 连接。该连接 ID 是参数 bigquery_connection_id 所引用的内容。您必须在“附加”字段中添加一个 json 对象，该对象定义 ak,v 对“项目”：“”

如果您没有在运行 Airflow 的机器上明确授权帐户，您还必须为“service_account”和“key_path”添加密钥。（gcloud 身份验证）

于 2016-11-01T21:44:55.773 回答
3

如果您需要以编程方式执行此操作，我将其用作堆栈中的入口点来创建连接（如果它尚不存在）：

from airflow.models import Connection
from airflow.settings import Session

session = Session()
gcp_conn = Connection(
    conn_id='bigquery',
    conn_type='google_cloud_platform',
    extra='{"extra__google_cloud_platform__project":"<YOUR PROJECT HERE>"}')
if not session.query(Connection).filter(
        Connection.conn_id == gcp_conn.conn_id).first():
    session.add(gcp_conn)
    session.commit()
于 2017-06-28T16:13:30.180 回答
1

最近我通过指定两者来解决类似的问题bigquery_conn_id，google_cloud_storage_conn_id如下所示：

t1 = BigQueryOperator(
  task_id='bigquery_test',
  bql='SELECT COUNT(userId) FROM [events:EVENTS_20160501]',
  destination_dataset_table=False,
  bigquery_conn_id='bigquery_default',             <-- Need these both
  google_cloud_storage_conn_id='bigquery_default', <-- becasue of inheritance 
  delegate_to=False,
  udf_config=False,
  dag=dag,
)

在此答案中查看更多信息：https ://stackoverflow.com/a/45664830/634627

于 2017-08-13T20:51:31.880 回答