"--target" parameter in "network log object create" is only expected for ML2/OVS

[Elvira García Ruiz]

According to command help [1], option "--target" when creating security group log should work to narrow down logging action for specific port.

However, this is something not expected in the ML2/OVN driver, where the minimal unit of logging is per security group, and is selected using --resource.

I raised this on the last Neutron meeting to see if it was possible to have a general solution for this that could be useful for any parameter and any driver (Like answering with an error through the API) but this would result on a driver-driven API which is something discouraged.

There was also the option of logging a Warning or an error when using non-supported parameters, but I don't know if this would give hints to the users about which driver they are using, something we also don't want non-admin users to know.

Finally, there is the option to fix this specific problem by changing the --help for network log create.

[1]
"""
$ openstack network log create --help
usage: openstack network log create ...

Create a new network log

positional arguments:
  <name> Name for the network log

optional arguments:
...
  --resource <resource>
                        Name or ID of resource (security group or firewall
                        group) that used for logging. You can control for
                        logging target combination with --target option.
  --target <target> Port (name or ID) for logging. You can control for
                        logging target combination with --resource option.
...
"""