Comment # 2 on bug 1154092 from Robert Schweikert

Is this the same image but with 2 different cloud.cfg files?

The message is not related to using config drive, the code cannot determine in
which configuration the network should be written out.

In order to find the proper rendering mechanism (the way the network
configuration is written) for the network configuration code searches for
specific commands to be available. For openSUSE and SLE, or in general to use
the code that writes entries for "sysconfig" cloud-init looks for the 'ifup'
and 'ifdown' commands.

In this case it appears as if these command are missing from the image being
tested. This would trigger the error message shown in the initial comment.

It is known that the proper network writing code is selected for images with
the 'ifup' and 'ifdown' commands included.

This suggests an issue with the image.