Airflow: How to SSH and run BashOperator from a different server

Question

Is there a way to ssh to different server and run BashOperator using Airbnb's Airflow? I am trying to run a hive sql command with Airflow but I need to SSH to a different box in order to run the hive shell. My tasks should look like this:

1. SSH to server1
2. start Hive shell
3. run Hive command

Thanks!

Answer 1

I think that I just figured it out:

1. Create a SSH connection in UI under Admin > Connection. Note: the connection will be deleted if you reset the database

2. In the Python file add the following

   from airflow.contrib.hooks import SSHHook
   sshHook = SSHHook(conn_id=<YOUR CONNECTION ID FROM THE UI>)
   

3. Add the SSH operator task

   t1 = SSHExecuteOperator(
       task_id="task1",
       bash_command=<YOUR COMMAND>,
       ssh_hook=sshHook,
       dag=dag)
   

Thanks!