Integrate GE with NiFi

Support
#1

Hello Team,

We are using NiFi for Data flow and want to integrate GE with NiFi to perform Validation within the NiFi pipeline before the data is ingested to Destination.

I did saw a reference in the docs that NiFi is supported but couldn’t find or understand how can i integrate GE with Nifi within the NiFi pipeline for Data Quality validations.

Kindly assist.

Thanks
Deepak

1 Like
#2

We have not talked to teams who implemented Great Expectations on NiFi yet, so there is no published how-to guide for this integration.

Here are a couple of pointers that should help:
Since NiFi allows running arbitrary Python code, integrating a validation step into a NiFi pipeline should look very similar to doing this in Airflow.

We have an example repo that shows an Airflow pipeline with Great Expectations integrated here: https://github.com/superconductive/ge_tutorials/tree/main/ge_dbt_airflow_tutorial

See this section where we define a node in the Airflow DAG that validates the input data using Airflow’s PythonOperator: https://github.com/superconductive/ge_tutorials/blob/main/ge_dbt_airflow_tutorial/airflow/ge_tutorials_dag_with_great_expectations.py#L185

Please publish anything that will be helpful to the community. If you need further help with this, ping us in our Slack: https://greatexpectations.io/slack

If more users are interested in this integration, please “thumb-up” this GitHub issue: https://github.com/great-expectations/great_expectations/issues/1891

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#3

Does that means I need to install python latest version along with great expectations on NiFi servers to perform the data validation checks in NiFi?

Can you share a sample python code which I can test in NiFi?

#4

The validate_source_data method in the Airflow example (here is the link to this method: https://github.com/superconductive/ge_tutorials/blob/main/ge_dbt_airflow_tutorial/airflow/ge_tutorials_dag_with_great_expectations.py#L68) is what you can use in NiFi.

#5

Hi,

Can you share an example to use GE with NiFi?

Thanks,
Deepak

#6

Hi,

Any updates on this, I think GE processor for NiFi would be the best or if you can share an example how he can be integrated within NiFi ?

Thanks
Deepak