For now we have to set the same mtu value inside the drone/docker plugin settings everytime.
A global setting for the runner would be fantastic
I would also be happy to contribute and dig a little bit deeper into the code, if someone could point me in the right direction, that would help me already a lot.
when you setup the kubernetes runner you can configure global environment variables that are injected into all pipeline steps. You can globally configure the PLUGIN_MTU environment variable, which is the equivalent of automatically adding mtu to your docker plugins steps in the yaml.