Airflow failed slack message

Question

How can I configure Airflow so that any failure in the DAG will (immediately) result in a slack message?

At this moment I manage it by creating a slack_failed_task:<

Answer 1

Try the new SlackWebhookOperator which is there in Airflow version>=1.10.0

from airflow.contrib.operators.slack_webhook_operator import SlackWebhookOperator

slack_msg="Hi Wssup?"

slack_test =  SlackWebhookOperator(
    task_id='slack_test',
    http_conn_id='slack_connection',
    webhook_token='/1234/abcd',
    message=slack_msg,
    channel='#airflow_updates',
    username='airflow_'+os.environ['ENVIRONMENT'],
    icon_emoji=None,
    link_names=False,
    dag=dag)

Note: Make sure you have slack_connection added in your Airflow connections as

host=https://hooks.slack.com/services/