•  Our Jenkins Master is accessible via Internet and can reach the internet via proxy configured in jenkins proxy settings.
• Our Kubernetes Cluster is in internet and can only be reached via the proxy.
• The kubernetes-plugin does not respect the jenkins proxy settings
• kubernets-plugin respects only settings configured via JVM Systemproperties which is no option in our environment because this config in not in our hands and the collegues have a problem with it because the proxy is protected with credentials

I patched the plugin to respect proxy settings and works fine, i could create a pull request for you to review my changes and i would be very happy to include this to the plugin