Kubernetes (K8s) has now become the most popular production-grade container management and orchestration system. Recently, I was involved in a project where an on-premises application needed to be containerized, managed by a Kubernetes cluster, and be able to connect to other apps outside cluster.
Here, I share my experience of running a container in a local K8s cluster and various options for networking externally to cluster. There are many posts related to or touching this topic, but most of them followed the minikube installation (single-node K8s cluster) whereas my cluster was installed using kubeadm. There are certain differences in K8s install options, as noted in the references below.