1 How to Install Open vSwitch on Red Hat Enterprise Linux
2 =======================================================
4 This document describes how to build and install Open vSwitch on a Red
5 Hat Enterprise Linux (RHEL) host. If you want to install Open vSwitch
6 on a generic Linux host, see INSTALL instead.
8 We have tested these instructions with RHEL 5.6 and RHEL 6.0.
10 Building Open vSwitch for RHEL
11 ------------------------------
13 You may build from an Open vSwitch distribution tarball or from an
14 Open vSwitch Git tree.
16 Before you begin, note the RPM source directory on your version of
17 RHEL. On RHEL 5, the default RPM source directory is
18 /usr/src/redhat/SOURCES. On RHEL 6, it is $HOME/rpmbuild/SOURCES.
20 1. If you are building from a distribution tarball, proceed to step 2.
21 Otherwise, if you are building from an Open vSwitch Git tree,
22 determine the version of Autoconf available in the RHEL version you
23 are using. If it is not at least version 2.64, then you have two
26 a. Install Autoconf 2.64 or later, one way or another.
28 b. Create a distribution tarball on some other machine, by
29 running "./boot.sh; ./configure; make dist" in the Git tree.
30 You must run this on a machine that has the tools listed in
31 INSTALL as prerequisites for building from a Git tree.
32 Afterward, proceed with the rest of the instructions using the
35 2. Install build prerequisites:
37 yum install gcc make python-devel openssl-devel kernel-devel graphviz \
38 kernel-debug-devel autoconf automake rpm-build redhat-rpm-config \
41 3. Some versions of the RHEL 6 kernel-devel package contain a broken
42 "build" symlink. If you are using such a version, you must fix
43 the problem before continuing.
45 To find out whether you are affected, run:
47 cd /lib/modules/<version>
50 where <version> is the version number of the RHEL 6 kernel. (The
51 trailing slash in the final command is important. Be sure to include
52 it.) If the "ls" command produces a directory listing, your
53 kernel-devel package is OK. If it produces a "No such file or
54 directory" error, your kernel-devel package is buggy.
56 If your kernel-devel package is buggy, then you can fix it with:
58 cd /lib/modules/<version>
60 ln -s /usr/src/kernels/<target> build
62 where <target> is the name of an existing directory under
63 /usr/src/kernels, whose name should be similar to <version> but may
64 contain some extra parts. Once you have done this, verify the fix with
65 the same procedure you used above to check for the problem.
67 4. If you are building from an Open vSwitch Git tree, then you will
68 need to first create a distribution tarball by running "./boot.sh;
69 ./configure; make dist" in the Git tree.
71 5. Copy the distribution tarball into the RPM source directory.
73 6. Unpack the distribution tarball into a temporary directory and "cd"
74 into the root of the distribution tarball.
76 7. To build Open vSwitch userspace, run:
78 rpmbuild -bb rhel/openvswitch.spec
80 This produces two RPMs: "openvswitch" and "openvswitch-debuginfo".
82 If the build fails with "configure: error: source dir
83 /lib/modules/2.6.32-279.el6.x86_64/build doesn't exist" or similar,
84 then the kernel-devel package is missing or buggy. Go back to step
85 1 or 2 and fix the problem.
87 8. On RHEL 6, to build the Open vSwitch kernel module, copy
88 rhel/openvswitch-kmod.files into the RPM source directory and run:
90 rpmbuild -bb rhel/openvswitch-kmod-rhel6.spec
92 You might have to specify a kernel version and/or variants, e.g.:
95 -D "kversion 2.6.32-131.6.1.el6.x86_64" \
96 -D "kflavors default debug kdump" \
97 rhel/openvswitch-kmod-rhel6.spec
99 This produces an "kmod-openvswitch" RPM for each kernel variant,
100 in this example: "kmod-openvswitch", "kmod-openvswitch-debug", and
101 "kmod-openvswitch-kdump".
103 A RHEL host has default firewall rules that prevent any Open vSwitch tunnel
104 traffic from passing through. If a user configures Open vSwitch tunnels like
105 GRE, VXLAN, LISP etc., they will either have to manually add iptables firewall
106 rules to allow the tunnel traffic or add it through a startup script (Please
107 refer to the "enable-protocol" command in the ovs-ctl(8) manpage).
109 Red Hat Network Scripts Integration
110 -----------------------------------
112 Simple integration with Red Hat network scripts has been implemented.
113 Please read rhel/README.RHEL in the source tree or
114 /usr/share/doc/openvswitch/README.RHEL in the installed openvswitch
120 Please report problems to bugs@openvswitch.org.