a6ec885522
This is a workaround to prevent the whole build from failing because of the intree kmods are not supported yet by upstream project. Root cause is that kernel version should not play a part when making DEPENDS as the generated kconfig was for all targets that may have different kernel versions. One less than ideal effect of this change is that for an unsupported kernel version, people can still select the intree kmod but it won't be built. This may contradict expectation if the warning was not noticed by them Resolves openwrt/packages#9274 Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
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-northfor ovs-northd, ovsdb-server, ovn helper utitlies - Install
openvswitch-ovn-hostfor ovn-controller andopenvswitch
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