Installing Openvswitch and KVM on CentOS 6.2
This is all (mostly) covered in the INSTALL.Linux inside the tar. This might help folks with some of the
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Download and Install Open vSwitch
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$ wget http://openvswitch.org/releases/openvswitch-1.3.0.tar.gz wget http://download.fedoraproject.org/pub/fedora/linux/releases/16/Everything/source/SRPMS/autoconf-2.68-2.fc15.src.rpm $rpm -ivh webdot-2.26-1.el6.noarch.rpm $yum -y install graphviz-tcl $yum -y install python-zope-filesystem $yum -y install python-zope-interface $yum -y install automake $yum -y install autoconf |
add yum -y install openssl-devel this package is necessary if you use SSL with OpenVSWitch. (Thanks for input Marcos)
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$yum –y install gcc |
The Open vSwitch datapath requires bridging support (CONFIG_BRIDGE) to be built as a kernel module. (This is common in kernels provided by Linux distributions.) The bridge module must not be loaded or in use. If the bridge module is running (check with “lsmod | grep bridge”), you must remove it (“rmmod bridge”) before starting the datapath.
To build the Linux kernel module, so that you can run the kernel-based switch, pass the location of the kernel build directory on –with-linux. For example, to build for a running instance of Linux:
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./configure --with-linux=/lib/modules/`uname -r`/build $make $make install insmod datapath/linux/openvswitch_mod.ko |
Verify the kernel mod loaded
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[root@localhost openvswitch-1.3.0]# lsmod openvswitch_mod 82086 0 |
If everything compiles and install create the sockets and db.
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$mkdir -p /usr/local/etc/openvswitch $ovsdb-tool create /usr/local/etc/openvswitch/conf.db vswitchd/vswitch.ovsschema ovsdb-server /usr/local/etc/openvswitch/conf.db --remote=punix:/usr/local/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,manager_options --private-key=db:SSL,private_key --certificate=db:SSL,certificate --bootstrap-ca-cert=db:SSL,ca_cert --pidfile --detach --log-file $ovs-vsctl --no-wait init $ovs-vswitchd --pidfile --detach $sudo ovs-vswitchd --pidfile --log-file --detach -v $ovs-vswitchd --pidfile –detach |
Setup the networking component by moving the IP off the physical interface to the new bridge interface
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$ifconfig eth0 0 $ifconfig br0 192.168.1.25 netmask 255.255.255.0 up $ifconfig eth0 up $ifconfig eth0 0.0.0.0 $sudo ovs-vsctl add-br br0 $sudo ovs-vsctl add-port br0 eth0 $route add default gw 192.168.1.1 br0 $route add default gw 192.168.1.1 br0 |
Installing and Integrating KVM into Open vSwitch
*Note* KVM is no longer supported on 32-bit HW.
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x86_64 <a href="http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm">http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm</a> $wget rpmforge-release-0.5.2-2.el6.rf.i686.rpm $rpm -ivh rpmforge-release-0.5.2-2.el6.rf.i686.rpm $rpm --import <a href="http://apt.sw.be/RPM-GPG-KEY.dag.txt">http://apt.sw.be/RPM-GPG-KEY.dag.txt</a> $yum -y install qemu-kvm qemu-kvm-tools libvert |
KVM GUI management tool
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$yum –y install virt-manager $yum install dejavu-lgc-sans-fonts |
Start the libvert daemon or reboot the system.
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$ Service libvertd start |
Start the KVM GUI
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$ ./virt-manager |
See the updated Install at the top for accurate information!
OK, Waiting on Part 2! I’m planning on use this to build a 2 host cluster running CentOS 6.2 with KVM. Doing what you have got here, what else do I need and should I just wait?
Oh man, I must have missed that lol. I will work on it later this week. I get so annoyed with the Yum repository its hard force myself to come out of Ubuntu. I used to love RH back in the day to 🙁 That said oVirt looked pretty cool that was released a a couple months ago have you tried it? KVM + oVswitch later this week.
Or try backing off the Swig version in the meantime. Curious what distro you have if you get a second.
Please, add yum -y install openssl-devel this package is necessary if you use SSL with OpenVSWitch.
Great article, congrats
Thanks Marcos. Appreciate the feedback. I need to clean this post up. I haven’t done much in RedHat lately. Have you tried oVirt with OpenvSwitch yet? Last time I visited it had just released. I guess I’ve turned into an OpenStack junky. lol.
Thanks Brent,
I´m trying to create a new switch to replace dvSwitch, like this http://blog.ioshints.info/2012/02/nicira-open-vswitch-inside-vsphereesx.html?spref=tw, to controller in Layer 2 and others restrictions on virtualization environment.
Hi,
I am currently trying out the instructions you have posted here but I am encountering this error on a CentOS 6.2:
configure: error: source dir /lib/modules/2.6.32-220.el6.x86_64/build doesn’t exist
The build folder can be found in the same location mentioned above but it is only a symbolic link of the folder /usr/src/kernels/`uname -r`.
How do I solve this issue?
If after the installation of the kernel-devel package the issue persists. That is due a misconfiguration of the kernel-devel package. A simple and fast solution is to re-link to the actual sources. I mean, just re-link to /usr/src/kernels/[your_kernel]. Only the build link, source is a link to build.
Carlo, did you solve that problem? I am having that problem too
Carlo, you can resolve that issue by installing the kernel-devel package
I recieve the following error while building kernel modules:
make -C /lib/modules/2.6.32-279.9.1.el6.x86_64/build M=/usr/src/openvswitch-1.7.1/datapath/linux modules
make[4]: Entering directory `/usr/src/kernels/2.6.32-279.9.1.el6.x86_64′
CC [M] /usr/src/openvswitch-1.7.1/datapath/linux/genetlink-brcompat.o
In file included from /usr/src/openvswitch-1.7.1/datapath/linux/compat/include/linux/netlink.h:4,
from /usr/src/openvswitch-1.7.1/datapath/linux/compat/include/net/genetlink.h:5,
from /usr/src/openvswitch-1.7.1/datapath/linux/compat/genetlink.inc:3,
from /usr/src/openvswitch-1.7.1/datapath/linux/genetlink-brcompat.c:10:
/usr/src/openvswitch-1.7.1/datapath/linux/compat/include/linux/skbuff.h:242: error: redefinition of ‘skb_frag_page’
include/linux/skbuff.h:1612: note: previous definition of ‘skb_frag_page’ was here
Hi guys, I will do an update next week for CentOS. I have been tunnel visioned on Ubuntu lately with other things. Will get it out this weekend.
Thanks!
-Brent
I was able to resolve the previous issue (specific to CentOS 6.3) by editing datapath/linux/compat/include/linux/skbuff.h and commenting out the following:
#if LINUX_VERSION_CODE page;
//}
#endif
Thank god for google translate:
http://www.xiaoyinzei.com/?p=32
I was able to resolve the previous issue (specific to CentOS 6.3) by editing datapath/linux/compat/include/linux/skbuff.h and commenting out the following:
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
//static inline struct page *skb_frag_page(const skb_frag_t *frag)
//{
// return frag->page;
//}
#endif
Thank god for google translate:
http://www.xiaoyinzei.com/?p=32
@Jay, where did you find the file: datapath/linux/compat/include/linux/skbuff.h
I have looked everywehre but can’t figure out where to find this file, i have similar problem and build directory in my running kernel src directory does not exist, what should i do??