We (the middleware messaging team) have started a new k8s related project that makes it easy to connect services across separate clouds. The upstream project is called 'skupper' - which is a play on the nautical term 'scupper' (as is the way when you're working in the k8s space).

Project page on Github:
https://github.com/skupperproject

The in progress project website:
https://skupperproject.github.io/skupper-website/