Abstract: An example system includes first servers deployed in a public cloud computing infrastructure and second servers deployed external to the public cloud computing infrastructure connected to the first servers via a layer 3 network. The first servers include first virtual routers to implement one or more virtual networks and first virtual execution elements. The first virtual execution elements execute a network controller that includes a plurality of microservices. A network device manages network routing for the second servers. The network controller is configured to exchange routing information with the network device. The network controller is configured to configure, based on the routing information, the first virtual routers to configure a virtual network of the one or more virtual networks for packetized communications among the first virtual execution elements executing on the first servers in the public cloud computing infrastructure and the second servers.