Hi,

Could you please check if the requirements are fulfilled, https://docs.databricks.com/clusters/custom-containers.html#requirements. 

Also, could you please try through the API if it is getting deployed? 

Also, as per the error it looks like the iptables has been enabled in the image for python. (https://stackoverflow.com/questions/5891779/is-there-a-python-interface-to-iptables). Could you please confirm it? 

Please tag @Debayan  with your next comment which will notify me. Thanks!