Demystifying Docker networking black magic
summary
Explains the container network model as three concrete pieces: sandbox (network namespace), endpoints implemented with veth pairs, and the docker0 bridge or user-created bridges that give containers IPs. Compares bridge networking to macvlan driver modes that bind container MAC/IP onto the underlay, and shows how overlay networks encapsulate packets for cross-host container-to-container connectivity. Describes service VIPs and built-in load balancing versus ephemeral container IPs and demonstrates the commands and artifacts to inspect and troubleshoot each mode.
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chapters (10)
- 0:00Introduction
- 1:40Container Network Model
- 6:56Network Drivers
- 17:30Macroland
- 20:01Bridge mode
- 26:40Service mode
- 29:11Overlay network
- 30:34Where is the bridge
- 39:53Properties
- 40:45Proxy
