We use components that are not listed in the Rancher support matrix. Would Rancher Support be not valid then?

For open source components not listed in the Rancher support matrix page, support is limited to troubleshooting for root cause up to Rancher’s drivers and interfaces to those components.  

Root causes that are identified to be beyond this limit will need to be pursued by Company with the maintainers and providers of commercial support for those components.

For ensuring best support and clarity on supportability, Company is recommended to publish to Rancher a list of components that are critical to its deployment but not explicitly called out in the support matrix.