Apache Ignite 2 has the ignite-kubernetes module with the class TcpDiscoveryKubernetesIpFinder. This module does not exist anymore in Ignite 3. Also the chapter "Installation"/"Kubernetes" only exists in the documentation for Ignite 2, but not in the one for Ignite 3.
Can anybody tell me what is the best way to deploy an application with integrated Ignite 3 to Kubernetes and whether there are plans to bring back the ignite-kubernetes module?
The instructions for Ignite 3 are almost exactly the same as for GridGain 9. In short, try using a headless service.