Deeper Dive in Docker Overlay Networks

Dive deep into the intricacies of Docker overlay networks in this 42-minute technical talk. Explore the underlying technologies powering Docker's network overlay driver, including network namespaces, VXLAN, Netlink, and distributed key-value stores. Follow along with hands-on demonstrations to understand how these mechanisms interact when setting up an overlay to connect containers. Learn how to build a simple overlay using these technologies and discover methods for dynamically distributing IP and MAC information across hosts in the overlay. Gain insights into the data plane, control plane, and practical applications of overlay networks in Docker environments. Examine topics such as multicast, point-to-point communication, BGP-EVPN, and DHCP configuration. Compare this approach to other solutions and consider future perspectives in container networking.

Intro
The Docker Overlay network
Docker Overlay: Data plane
What is VXLAN?
Let's build an overlay "manually"
Overlay namespaces
Creating the overlay namespace
Attach containers
Create containers and attach them
Does it ping?
Multicast
Point-to-point
Docker Overlay control plane (3: User-land)
BGP-EVPN
BGP in one slide
A quick BGP example
Creating our BGP clients on Docker hosts
Configuring VXLAN interfaces
Overview
What's interesting about this setup?
Taking advantage of broadcast: DHCP
Configuring DHCP
Getting out of our Docker environment
What could a real-life setup look like?
How does it compare to other solutions?
Perspectives