This blog is part of my ongoing series on Docker containers. Weaveworks is developing a Docker Networking solution to connect Containers. I recently played around with their solution and in this blog, I will capture some of my thoughts.
Following are some internals on their implementation as I understood:
- Weave creates a Weave bridge as well as a Weave router in the host machine.
- Weave router establishes both tcp and udp connection across hosts to other Weave routers. TCP connection is used for discovery and protocol related exchange. UDP is used for data encapsulation. Encryption can be done if needed.
- The Weave bridge is configured to sniff the packets that needs to be sent across hosts and redirect to the Weave router. For local switching, weave router is not used.
Following is a picture of the data path between 2 containers on 2 different hosts.
Sreenivas Makam's Blog 