https://techcrunch.com/2019/04/02/cloud-foundry-kubernetes/

Cloud Foundry, the open source platform-as-a-service project that more than half of the Fortune 500 companies use to help them build, test and deploy their applications, launched well before Kubernetes existed. Because of this, the team ended up building Diego, its own container management service. Unsurprisingly, given the popularity of Kubernetes, which has become somewhat of the de facto standard for container orchestration, a number of companies in the Cloud Foundry ecosystem starting looking into how they could use Kubernetes to replace Diego.

The result of this is Project Eirini, which was first proposed by IBM. As the Cloud Foundry Foundation announced today, Project Eirini now passes the core functional tests the team runs to validate the software releases of its application runtime, the core Cloud Foundry service that deploys and manages applications (if that’s a bit confusing, don’t even think about the fact that there’s also a Cloud Foundry Container Runtime, which already uses Kubernetes, but which is mostly meant to give enterprise a single platform for running their own applications and pre-built containers from third-party vendors).