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openwrt-packages/net/openvswitch
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Ilya Lipnitskiy b1cbd93bcd
treewide: Run refresh on all packages 
The crude loop I wrote to come up with this changeset:

  find -L package/feeds/packages/ -name patches | \
  sed 's/patches$/refresh/' | sort | xargs make

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
(cherry picked from commit 5d8d4fbbcb)
Signed-off-by: Jeffery To <jeffery.to@gmail.com>
 		2021-02-25 01:26:05 +08:00
..
files openvswitch: use new extra_command function definition 2020-11-04 08:50:34 +01:00
patches treewide: Run refresh on all packages 2021-02-25 01:26:05 +08:00
Makefile openvswitch: use new extra_command function definition 2020-11-04 08:50:34 +01:00
README.md openvswitch: adds new UCI section ovs_bridge 2020-07-28 12:46:17 +08:00
openvswitch.mk openvswitch: bump to version 2.14.0 2020-08-25 15:50:32 +08:00

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

UCI configuration options

There are 4 config section types in package openvswitch: ovs ovn_northd, ovn_controller & ovs_bridge.

Each of these supports a disabled option, which should be set to 0 to launch the respective daemons.

The ovs_bridge section also supports the options below, for initialising a virtual bridge with an OpenFlow controller.

Name Type Required Default Description
disabled boolean no 0 If set to true, disable initialisation of the named bridge
name string no Inherits UCI config block name The name of the switch in the OVS daemon
controller string no (none) The endpoint of an OpenFlow controller for this bridge