![]() Prerequisite Environment Preparationīefore using Docker overlay networking, check the version of docker with docker -v to confirm that docker version is no less than v1.9. Docker implements a built-in VXLAN-based overlay network driver in libnetwork library to support a wide range virtual network between multiple hosts. So the overlay network requires a valid key-value store service to exchange informations between different docker engines. Docker multi-host networking uses VXLAN-based solution with the help of libnetwork and libkv library. There are already several Multi-host networking solutions for docker, such as Calico and Flannel. ![]() Multi-host Networking was announced as part of experimental release in June, 2015, and turns to stable release of Docker Engine this month. This blog illustrates the configuration and a few evaluations of Docker multi-host overlay networking. This big release put Swarm and multi-host networking into production-ready status. Docker has released its newest version v1.9 ( see details) on November 3, 2015.
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