我对Airflow很陌生.我已经阅读了几次文档,在网上遇到了许多S / O问题和许多随机文章,但尚未解决此问题.我觉得这很简单,我做错了.
我有适用于Windows的Docker,我拉起了puckel / docker-airflow映像并运行了一个带有暴露端口的容器,以便可以从主机访问UI.我有另一个运行mcr.microsoft.com/mssql/server的容器,在该容器上还原了WideWorldImporters示例数据库.通过Airflow UI,我已经能够成功创建与此数据库的连接,甚至可以从“数据分析”部分中查询它.查看以下图像：
Connection Creation
Successful Query to Connection

因此,尽管这可行,但我的dag在第二个任务sqlData失败.这是代码：

from airflow.models import DAG
from airflow.operators.bash_operator import BashOperator
from airflow.operators.python_operator import PythonOperator
from airflow.operators.mssql_operator import MssqlOperator
from datetime import timedelta,datetime

copyData = DAG(
    dag_id='copyData',schedule_interval='@once',start_date=datetime(2019,1,1)
)


printHelloBash = BashOperator(
    task_id = "print_hello_Bash",bash_command = 'echo "Lets copy some data"',dag = copyData
)

mssqlConnection = "WWI"
sqlData = MssqlOperator(sql="select top 100 InvoiceDate,TotalDryItems from sales.invoices",task_id="select_some_data",mssql_conn_id=mssqlConnection,database="WideWorldImporters",dag = copyData,depends_on_past=True
          )

queryDataSuccess = BashOperator(
    task_id = "confirm_data_queried",bash_command = 'echo "We queried data!"',dag = copyData
)

printHelloBash >> sqlData >> queryDataSuccess

最初的错误是：

*[2019-02-22 16:13:09,176] {{logging_mixin.py:95}} INFO - [2019-02-22 16:13:09,176] {{base_hook.py:83}} INFO - Using connection to: 172.17.0.3  
[2019-02-22 16:13:09,186] {{models.py:1760}} ERROR - Could not create Fernet object: Incorrect padding  
Traceback (most recent call last):  
  File "/usr/local/lib/python3.6/site-packages/airflow/models.py",line 171,in get_fernet
    _fernet = Fernet(fernet_key.encode('utf-8'))  
  File "/usr/local/lib/python3.6/site-packages/cryptography/fernet.py",line 34,in __init__
    key = base64.urlsafe_b64decode(key)  
  File "/usr/local/lib/python3.6/base64.py",line 133,in urlsafe_b64decode
    return b64decode(s)  
  File "/usr/local/lib/python3.6/base64.py",line 87,in b64decode
    return binascii.a2b_base64(s)
binascii.Error: Incorrect padding*

我注意到这与加密有关,因此我继续运行pip install加密和pip install airflow [crytpo],它们都返回了完全相同的结果,通知我该要求已经得到满足.终于,我发现一些东西说我只需要生成一个fernet_key.我的airflow.cfg文件中的默认密钥为fernet_key = $FERNET_KEY.因此,从容器中的cli中我运行了：

python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"

并得到了我用$FERNET_KEY替换的代码.我重新启动了容器,然后重新运行了dag,现在我的错误是：

[2019-02-22 16:22:13,641] {{models.py:1760}} ERROR -   
Traceback (most recent call last):  
  File "/usr/local/lib/python3.6/site-packages/cryptography/fernet.py",line 106,in _verify_signature
    h.verify(data[-32:])  
  File "/usr/local/lib/python3.6/site-packages/cryptography/hazmat/primitives/hmac.py",line 69,in verify
    ctx.verify(signature)  
  File "/usr/local/lib/python3.6/site-packages/cryptography/hazmat/backends/openssl/hmac.py",line 73,in verify
    raise InvalidSignature("Signature did not match digest.")  
cryptography.exceptions.InvalidSignature: Signature did not match digest.

初始加密文档扫描中的哪一项与兼容性有关？

我现在迷茫了,决定决定问这个问题,看看我在解决这个问题上是否走了错误的道路.任何帮助将不胜感激,因为气流似乎很棒.