This document describes how to build and install Open vSwitch on a
Citrix XenServer host. If you want to install Open vSwitch on a
-generic Linux host, see INSTALL.Linux instead.
+generic Linux or BSD host, see INSTALL instead.
These instructions have been tested with XenServer 5.6 FP1.
Building Open vSwitch for XenServer
-----------------------------------
-The recommended build environment to build RPMs for Citrix XenServer
-is the DDK VM available from Citrix. If you are building from an Open
-vSwitch distribution tarball, this VM has all the tools that you will
-need. If you are building from an Open vSwitch Git tree, then you
-will need to first create a distribution tarball elsewhere, by running
-"./boot.sh; ./configure; make dist" in the Git tree, because the DDK
-VM does not include Autoconf or Automake that are required to
-bootstrap the Open vSwitch distribution.
+You may build from an Open vSwitch distribution tarball or from an
+Open vSwitch Git tree. The recommended build environment to build
+RPMs for Citrix XenServer is the DDK VM available from Citrix.
-Once you have a distribution tarball, copy it into
-/usr/src/redhat/SOURCES inside the VM. Then execute the following:
+1. If you are building from an Open vSwitch Git tree, then you will
+ need to first create a distribution tarball by running "./boot.sh;
+ ./configure; make dist" in the Git tree. You cannot run this in
+ the DDK VM, because it lacks tools that are necessary to bootstrap
+ the Open vSwitch distribution. Instead, you must run this on a
+ machine that has the tools listed in INSTALL as prerequisites for
+ building from a Git tree.
+
+2. Copy the distribution tarball into /usr/src/redhat/SOURCES inside
+ the DDK VM.
+
+3. In the DDK VM, unpack the distribution tarball into a temporary
+ directory and "cd" into the root of the distribution tarball.
+
+4. To build Open vSwitch userspace, run:
+
+ rpmbuild -bb xenserver/openvswitch-xen.spec
+
+ This produces three RPMs in /usr/src/redhat/RPMS/i386:
+ "openvswitch", "openvswitch-modules-xen", and
+ "openvswitch-debuginfo".
+
+Build Parameters
+----------------
+
+openvswitch-xen.spec needs to know a number of pieces of information
+about the XenServer kernel. Usually, it can figure these out for
+itself, but if it does not do it correctly then you can specify them
+yourself as parameters to the build. Thus, the final "rpmbuild" step
+above can be elaborated as:
VERSION=<Open vSwitch version>
KERNEL_NAME=<Xen Kernel name>
KERNEL_VERSION=<Xen Kernel version>
KERNEL_FLAVOR=<Xen Kernel flavor(suffix) >
- cd /tmp
- tar xfz /usr/src/redhat/SOURCES/openvswitch-$VERSION.tar.gz
rpmbuild \
-D "openvswitch_version $VERSION" \
-D "kernel_name $KERNEL_NAME" \
-D "kernel_version $KERNEL_VERSION" \
-D "kernel_flavor $KERNEL_FLAVOR" \
- -bb openvswitch-$VERSION/xenserver/openvswitch-xen.spec
+ -bb xenserver/openvswitch-xen.spec
where:
The "xen" flavor is the main running kernel flavor and the "kdump" flavor is
the crashdump kernel flavor. Commonly, one would specify "xen" here.
-Three RPMs will be output into /usr/src/redhat/RPMS/i386, whose names begin
-with "openvswitch", "openvswitch-modules-xen" (if building for kernel_flavor=xen),
-and "openvswitch-debuginfo".
-
Installing Open vSwitch for XenServer
-------------------------------------
/etc/init.d/openvswitch runs early in boot. It does roughly the
following:
- * Loads the OVS kernel module, openvswitch_mod.
+ * Loads the OVS kernel module, openvswitch.
* Starts ovsdb-server, the OVS configuration database.
* If XAPI is configured for a manager, configures the OVS
manager to match with "ovs-vsctl set-manager".
-The Open vSwitch boot sequence only configures an OVS configuration
+Notes
+-----
+
+* The Open vSwitch boot sequence only configures an OVS configuration
database manager. There is no way to directly configure an OpenFlow
controller on XenServer and, as a consequence of the step above that
deletes all of the bridges at boot time, controller configuration only
persists until XenServer reboot. The configuration database manager
can, however, configure controllers for bridges. See the BUGS section
-of ovs-controller(8) for more information on this topic.
+of test-controller(8) for more information on this topic.
+
+* The Open vSwitch startup script automatically adds a firewall rule
+to allow GRE traffic. This rule is needed for the XenServer feature
+called "Cross-Host Internal Networks" (CHIN) that uses GRE. If a user
+configures tunnels other than GRE (ex: VXLAN, LISP), they will have
+to either manually add a iptables firewall rule to allow the tunnel traffic
+or add it through a startup script (Please refer to the "enable-protocol"
+command in the ovs-ctl(8) manpage).
Reporting Bugs
--------------
git://git.onelab.eu / sliver-openvswitch.git / blobdiff