Accessing configuration parameters passed to Airflow through CLI

I am trying to pass the following configuration parameters to Airflow CLI while triggering a dag run. Following is the trigger_dag command I am using.

airflow trigger_dag  -c '{"account_list":"[1,2,3,4,5]", "start_date":"2016-04-25"}'  insights_assembly_9900 

My problem is that how can I access the con parameters passed inside an operator in the dag run.

Answer

This is probably a continuation of the answer provided by devj.

1. At airflow.cfg the following property should be set to true: dag_run_conf_overrides_params=True

2. While defining the PythonOperator, pass the following argument provide_context=True. For example:

get_row_count_operator = PythonOperator(task_id='get_row_count', python_callable=do_work, dag=dag, provide_context=True)

3. Define the python callable (Note the use of **kwargs):

def do_work(**kwargs):    
    table_name = kwargs['dag_run'].conf.get('table_name')    
    # Rest of the code

4. Invoke the dag from command line:

airflow trigger_dag read_hive --conf '{"table_name":"my_table_name"}'

I have found this discussion to be helpful.