Airflow Hooks Vs Operators

Source code for airflow operators postgres operator coding.

Airflow hooks vs operators. Airflow pools can be used to limit the execution parallelism on arbitrary sets of tasks. According to the airflow documentation they can be added using airflow s plugins mechanism. The asf licenses this file to you under the apache license version. Pools some systems can get overwhelmed when too many processes hit them at the same time.

The hook retrieves the auth parameters such as username and password from airflow backend and passes the params to the airflow hooks base hook basehook get connection. Operators determine what actually executes when your dag runs. With latest airflow version 1 10 sshexecuteoperator is deprecated and new sshoperator has to be used. Airflow models baseoperator sshoperator to execute commands on given remote host using the ssh hook.

Module contents class airflow contrib operators ssh operator sshoperator ssh hook none ssh conn id none remote host none command none timeout 10 do xcom push false environment none get pty false args kwargs source. If anyone is using 1 10 then new import should be from airflow contrib hooks ssh hook import sshhook and from airflow contrib operators ssh operator import sshoperator. Utf 8 licensed to the apache software foundation asf under one or more contributor license agreements. These integrations allow you to perform various operations within software developed by apache software foundation.

There is however some confusion on the best way to implement them. When the operator invokes the query on the hook object a new connection gets created if it doesn t exist. Custom hooks and operators are a powerful way to extend airflow to meet your needs. Software operators and hooks.

Biranjan oct 31 18 at 13 43. See the operators concepts documentation and the operators api reference for more information. See the notice file distributed with this work for additional information regarding copyright ownership.