Devices, system and methods build a mesh virtual private network (VPN) in a hybrid cloud cluster having a private and a public cloud with connected network nodes. Each node has an operating system (OS) to discover nodes of the VPN by determining IP addresses and port addresses of the nodes from data received from discovery agents. An internal discovery agent of each of the nodes determines IP addresses and port addresses of the nodes. A node discovery agent located within a node determines IP addresses and port addresses of other nodes. An external discovery agent located outside the cluster determines IP addresses and port addresses of nodes. A VPN configuration data generator of the OS generates VPN configuration data of the clouds using the IP addresses and port addresses. A VPN builder of the OS builds a configuration of the VPN of the hybrid cluster using the VPN configuration data.