// the find
yeasy/openstack_understand_Neutron
Introduce the principles and implementation details of the OpenStack Neutron Project.
A Chinese-language book (GitBook format) explaining the internals of OpenStack Neutron — the virtual networking layer. It covers OVS flow rules, GRE/VLAN/VXLAN modes, DVR, security groups, FWaaS, and LBaaS at a level below what the official docs go to. Written for operators and developers who need to understand what's actually happening on the wire, not just how to configure it.
The OVS flow table walkthroughs are the main value here — most documentation stops at configuration, this one shows the actual OpenFlow rules and how packets traverse br-int, br-tun, and br-ex. DVR coverage is unusually detailed, with per-scenario diagrams for east-west and north-south traffic. The directory structure maps cleanly to Neutron subsystems, so it works as a reference you can jump into by topic. Diagrams are plentiful and tied directly to the flow analysis, not decorative.
Last updated in 2018, which means it documents Neutron circa Ocata/Pike — the OVS driver has been substantially reworked since (OVN is now the default backend as of Yoga/2022 and is architecturally different). Anyone running a current OpenStack deployment will hit gaps immediately. The book is entirely in Chinese, which cuts off the majority of potential readers. VXLAN mode is noticeably thin compared to GRE and VLAN chapters, suggesting it was never finished. GitBook links in the README point to gitbook.io which is defunct.