SFTPOperator with dynamic user, fails.

[remchuk]

What do you see as an issue?

Hey there, This is my first post here so forgive me if this is not the correct place.

I have a unique need of Airflow, I need to integrate SFTP&SSH Operator with a dynamic client, meaning I need that every trigger will also prompt for a user and a password, This means that I can't actually create a permanent Connection in the UI.

I find that using SSHHook is the correct approch.
I created a task that receives the params, and does:

def create_ssh_hook(**kwargs):
    ti = kwargs["ti"]
    ti.xcom_push(key="ssh_hook_host", value=kwargs["params"]["host"])
    ti.xcom_push(key="ssh_hook_username", value=kwargs["params"]["username"])
    ti.xcom_push(key="ssh_hook_password", value=kwargs["params"]["password"])


create_ssh_hook_task = PythonOperator(
     task_id="create_ssh_hook",
     provide_context=True,
     python_callable=create_ssh_hook,
    op_kwargs=params
)


add_file_to_vm = SFTPOperator(
      task_id='add_script_to_vm',
      sftp_hook=SFTPHook(ssh_hook=SSHHook(remote_host="{{ ti.xcom_pull(key='ssh_hook_host', task_ids='create_ssh_hook') }}",  # I know this is not supported after 4.9.0, but I can't find a different way to do it and this is the version we have.
                                          username="{{ ti.xcom_pull(key='ssh_hook_username', task_ids='create_ssh_hook') }}"
                                          password="{{ ti.xcom_pull(key='ssh_hook_password', task_ids='create_ssh_hook') }}")),
     local_filepath='/a',
     remote_filepath='/tmp/a',
     operation='put',
     create_intermediate_dirs=True,
)

create_ssh_hoot_task >> add_file_to_vm

Now I recieve the following error:
socket.gaierror: [Errno -2] Name or service not known

Now when trying to just ssh from the same place that runs this dag, works just fine, also setting up a proper connection with a static user and a ssh_conn_id also works.

Solving the problem

I think the correct way of working with SSHHook should still be implemented.
I tried every docs file but none specify about dynamic connection.

Anything else

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[boring-cyborg]

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