Kilo connects nodes in a cluster by providing an encrypted layer 3 network that can span across data centers and public clouds. By allowing pools of nodes in different locations to communicate securely, Kilo enables the operation of multi-cloud clusters. Kilo's design allows clients to VPN to a cluster in order to securely access services running on the cluster. In addition to creating multi-cloud clusters, Kilo enables the creation of multi-cluster services, i.e. services that span across different Kubernetes clusters.
Wormhole is a simple CNI plugin designed to create an encrypted overlay network for kubernetes clusters.
WireGuard is a fascinating Fast, Modern, Secure VPN tunnel, that has been gaining significant praise from security experts, and is currently proposed for inclusion within the linux kernel.
Goldpinger makes calls between its instances for visibility and alerting. It runs as a DaemonSet on Kubernetes and produces Prometheus metrics that can be scraped, visualised and alerted on.