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openwrt-packages-dist/net/openvswitch
Yousong Zhou 989ef5d414 openvswitch: switch to using python3 both on build and target machine 6 years ago
..
files openvswitch: multiple fixes for 2.10 6 years ago
patches openvswitch: bump to version 2.11.0 6 years ago
Makefile openvswitch: switch to using python3 both on build and target machine 6 years ago
README.md openvswitch: provide in-tree kmod builds 6 years ago

README.md

Which packages to install

Install openvswitch if you need OpenFlow virtual switch function. It contains ovs-vswitchd, ovsdb-server and helper utilities such as ovs-vsctl, ovs-ofctl, ovs-ctl etc.

Linux kernel datapath module openvswitch.ko will also be installed along with package openvswitch. Tunnel encap support for gre, geneve, vxlan can be included by installing kmod-openvswitch-{gre,geneve,vxlan} respectively

For OVN deployment

  • Install openvswitch-ovn-north for ovs-northd, ovsdb-server, ovn helper utitlies
  • Install openvswitch-ovn-host for ovn-controller and openvswitch

How to use them

Open vSwitch provides a few very useful helper script in /usr/share/openvswitch/scripts/. A simple initscript is provided. It's mainly a wrapper around ovs-ctl and ovn-ctl with simple knobs from /etc/config/openvswitch. Procd is not used here.

/etc/init.d/openvswitch start
/etc/init.d/openvswitch stop
/etc/init.d/openvswitch stop north
/etc/init.d/openvswitch restart ovs
/etc/init.d/openvswitch status

Use ovs-ctl and ovn-ctl directly for more functionalities

Open vSwitch in-tree Linux datapath modules

The Open vSwitch build system uses regexp and conditional-compilation heuristics to support building the shipped kernel module source code against a wide range of kernels, as of openvswitch-2.10, the list is supposed to include vanilla linux 3.10 to 4.15, plus a few distro kernels.

It may NOT work

  • Sometimes the code does not compile
  • Sometimes the code compiles but insmod will fail
  • Sometimes modules are loaded okay but actually does not function right

For these reasons, the in-tree datapath modules are NOT visible/enabled by default.

Building and using in-tree datapath modules requires some level of devel abilities to proceed. You are expected to configure build options and build the code on your own

E.g. pair openvswitch userspace with in-tree datapath module

CONFIG_DEVEL=y
CONFIG_PACKAGE_openvswitch=y
# CONFIG_PACKAGE_kmod-openvswitch is not set
CONFIG_PACKAGE_kmod-openvswitch-intree=y

E.g. replace in-tree datapath module with upstream version

opkg remove --force-depends kmod-openvswitch-intree
opkg install kmod-openvswitch
ovs-ctl force-reload-kmod