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Re: [libvirt-users] [ovs-discuss] OpenVswitch with KVM virtual machines
by Neha Jatav 12 Jul '12

12 Jul '12

I am running NOX controller with a python script that prints out the destination mac and the source mac for each packet arriving at the now controller and then floods it out. So here's what happening: With em1 connected, all the packets that arrive at em1 are coming to the controller and printing out the details. However, without em1 connected to the OVS, when I have the following setup: ____ ____ / VM1\______br0_______/ VM3\ \____/ | \____/ | _|_ /VM2\ \___/ VM1 & VM2 are of the same subnet. They can ping each other. The ping packets aren't seen at the controller probably because they are in the same subnet and they don't need a flow table entry. VM3 is in a different subnet. So, when I ping from VM1 to VM3 or viceversa, they aren't reachable to each other. However, the packets do not arrive at the controller at all. Could you suggest me what might possibly be wrong. This is how the bridge looks: $sudo ovs-vsctl br0 show Bridge "br0" Port "vnet1" Interface "vnet1" Port "br0" Interface "br0" type: internal Port "vnet0" Interface "vnet0" Port "vnet2" Interface "vnet2" ovs_version: "1.4.0" Thanks and Regards, Neha On 7/9/12 11:48 PM, "Neha Jatav" <jneha(a)yahoo-inc.com> wrote: > > >On 7/9/12 10:25 PM, "Ben Pfaff" <blp(a)nicira.com> wrote: > >>On Tue, Jul 10, 2012 at 01:46:07AM +0900, Neha Jatav wrote: >>> I have KVM installed on my Fedora 17 box. I added the network >>>interfaces of the virtual machines to the openvswitch bridge as follows: >>> >>> ____ ____ >>> / VM1\______br0_______/ em1\ >>> \____/ | \____/ >>> | >>> _|_ >>> /VM2\ >>> \____/ >>> >>> virbr0 is the virtual network switch >>> VM1 and VM2 are on the same subnet having tap interfaces vnet0 and >>>vnet1 respectively. >>> em1 is the default network interface. >>> >>> $sudo ovs-vsctl add-br br0 >>> $sudo ovs-vsctl add-port br0 em1 >>> $sudo ifconfig br0 <ip address of em1> >>> $sudo ip route del default dev em1 >>> $sudo ip route add default dev br0 >>> (Using the above commands, I was able to connect to the internet) >>> >>> $sudo brctl delif virbr0 vnet0 >>> $sudo ovs-vsctl add-port br0 vnet0 >>> $sudo brctl delif virbr0 vnet1 >>> $sudo ovs-vsctl add-port br0 vnet1 >>> >>> $brctl show >>> bridge name bridge id STP enabled interfaces >>> virbr0 8000.52540094e45e yes virbr0-nic >>> vnet0 >>> vnet2 >>> >>> $sudo ovs-vsctl show >>> Bridge "br0" >>> Port "vnet1" >>> Interface "vnet1" >>> Port "br0" >>> Interface "br0" >>> type: internal >>> Port "vnet0" >>> Interface "vnet0" >>> Port "em1" >>> Interface "em1" >>> ovs_version: "1.4.0" >>> >>> $ifconfig em1 >>> em1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 >>> inet 10.66.97.253 netmask 255.255.254.0 broadcast >>>10.66.97.255 >>> inet6 fe80::226:55ff:fe3e:971c prefixlen 64 scopeid >>>0x20<link> >>> ether 00:26:55:3e:97:1c txqueuelen 1000 (Ethernet) >>> RX packets 194955 bytes 81216930 (77.4 MiB) >>> RX errors 0 dropped 0 overruns 0 frame 0 >>> TX packets 53004 bytes 9477482 (9.0 MiB) >>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> device interrupt 19 memory 0xf0200000-f0220000 >>> >>> $ifconfig br0 >>> br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 >>> inet 10.66.97.253 netmask 255.0.0.0 broadcast 10.255.255.255 >>> inet6 fe80::226:55ff:fe3e:971c prefixlen 64 scopeid >>>0x20<link> >>> ether 00:26:55:3e:97:1c txqueuelen 0 (Ethernet) >>> RX packets 84745 bytes 60302978 (57.5 MiB) >>> RX errors 0 dropped 0 overruns 0 frame 0 >>> TX packets 44528 bytes 7732040 (7.3 MiB) >>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >>> By default, the OVS should act as a MAC-layer learning switch. However, >>>the VMs which are in the same subnet can ping each other but the VMs >>>can't ping the host machine (10.66.97.253) & viceversa. >>> Can you tell me where am I wrong in my approach? >> >>You appear to have both OVS bridges and Linux bridges. Why? And at >>least interface vnet0 is configured to be on both the Linux bridge and >>the OVS bridge. That can't work. > >$sudo brctl delif virbr0 vnet0 >I deleted this interface from virbr0 using the above command and only then >I connected it to br0. So, vnet0 is only configured on the OVS bridge. >Same is true with the vnet1. > > > >> >>Also you appear to have the same IP address 10.66.97.253 configured on >>both em1 and br0 (with different netmasks). That won't work properly >>either. > >I did the following: >$sudo ifconfig br0 10.66.97.253 netmask 255.255.254.0 >It resulted in losing connection to the internet. > >> >>Did you read the FAQ? http://openvswitch.org/faq/ >

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[libvirt-users] Different SAS controller IDs
by Anton Nikiforov 12 Jul '12

12 Jul '12

Dear All, I have problem with setting up migration on Intel Multi-Flex server. The problem is that SAS controller IDs (and volume ids in /dev/disk/by-path directory) are different between nodes. For example on node0 i have: lrwxrwxrwx 1 root root 9 Jun 29 07:20 pci-0000:04:00.0-sas-0x500015500002040a-lun-0 -> ../../sda lrwxrwxrwx 1 root root 10 May 27 09:17 pci-0000:04:00.0-sas-0x500015500002040a-lun-0-part1 -> ../../sda1 ....... On node1 i have: lrwxrwxrwx 1 root root 9 Jul 12 21:19 /dev/disk/by-path/pci-0000:04:00.0-sas-0x5000155000020409-lun-0 -> ../../sda lrwxrwxrwx 1 root root 10 Jul 12 21:19 /dev/disk/by-path/pci-0000:04:00.0-sas-0x5000155000020409-lun-0-part1 -> ../../sda1 ........ Difference is in 0x500015500002040a and 0x5000155000020409 But this is the matter of migration falure because migration script cannot find needed volume. Is there any chance to fix it somehow? Best regards, Anton Nikiforov

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[libvirt-users] Starting a program inside VM through libvirt
by Jørgen Nordmoen 12 Jul '12

12 Jul '12

Hi again. I was just wondering if there are any support for running programs inside a VM through libvirt. From what I can see in the API the only solution I found was connecting to the VM with openConsole and running the program I want. This however seems a bit tricky through Python and I was just wondering if there are any simpler solutions. Best regards. Jørgen

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[libvirt-users] PCI-Passthrough suddenly stopped working
by Rouven Sacha 12 Jul '12

12 Jul '12

Hi everybody! On a Centos 5.8 with libvirt qemu-0.10.5-1.el5.2, libvirt-0.8.2-22.el5 and 2.6.18-308.11.1.el5 I have a Windows machine that used to have pci-passthrough for a device enabled and working. After an update (kernel, libvirt afaik) and a reboot, pci-passthrough stopped working. Intel IOMMU is enabled (can see that from the dmesg output). All i get on the console when i try to start the vm is the following: Fehler: internal error process exited while connecting to monitor: char device redirected to /dev/pts/3 Failed to assign device "14:00.2" : Invalid argument Failed to deassign device "14:00.2" : Invalid argument Failed to initialize assigned device host=14:00.2 SELinux ist disabled. Does anyone have any hint what could have possibly gone wrong? As an additional info: "virsh nodeddev-list" also doesn't work. I don't know if I mix that up, but i seem to remember that that used to work on that machine. root@kvm ~]# virsh nodedev-list --tree Fehler: Failed to count node devices Fehler: this function is not supported by the connection driver: virNodeNumOfDevices Any hints are greatly appreciated! Thanks & Cheers, Rouven -- Blinkenlichten Open Source Solutions Maass Sacha GbR | Weigandufer 45 | 12059 Berlin tel: +493013896247 | fax: +493013896249 | mob: +491744220127 Web: http://www.blinkenlichten.de/ G+: http://gplus.to/blinkenlichten Blinkenlichten Zarafa Hosted Tweets: http://twitter.com/zarafamail/

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[libvirt-users] compiling docs from git
by Arindam Choudhury 12 Jul '12

12 Jul '12

Hi, I am unable to compile documents obtained from the git source. I am getting this error: Brand 'libvirt' had no content to copy. at /usr/bin/publican line 763 Thanks

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[libvirt-users] storage volume's size change
by Shantanu Pavgi 11 Jul '12

11 Jul '12

I have a question regarding storage volumes. I have uploaded a sparsed raw disk file to a storage volume, where virtual/max. size of the raw disk file is larger than size of the initial libvirt volume. Following is an example of commands: # Create storage volume of capacity 9G $ virsh-sys vol-create-as --pool pool-01 --name saturn.img --capacity 9G # Display volume info $ virsh-sys vol-info saturn.img --pool pool-01 Name: saturn.img Type: file Capacity: 9.00 GB Allocation: 36.11 MB # Upload raw disk file to the volume $ virsh-sys vol-upload --vol saturn.img --file /lustre/scratch/shantanup/saturn-disk.img --pool pool-01 # qemu-img info on disk file which was uploaded $ qemu-img info /lustre/scratch/shantanup/saturn-disk.img file format: raw virtual size: 20G (21474836480 bytes) disk size: 5.7G # vol-info after uploading the raw disk image $ virsh-sys vol-info saturn.img --pool pool-01 Name: saturn.img Type: file Capacity: 20.00 GB Allocation: 20.00 GB The vol-info command indicates that volume size has changed after uploading the raw disk image to it. So has the volume size really changed to 20G or will the system experience any problem after actual disk size (currently 5.7G) hits 9G limit? I can't directly poke into the storage pool mount to run ls or qemu-img commands on underlying volumes, so I don't have that information. Any help? -- Thanks, Shantanu

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[libvirt-users] live migration
by hcyy 11 Jul '12

11 Jul '12

Hello, everybody. I use NFS to do live migration。After input virsh --connect=qemu:///system --quiet migrate --live vm12 qemu+tcp://pcmk-1/system (vm12 is vm name,/pcmk-1 is host name)it use almost 10s for preparation. During the 10s,the vm is still runing and can ping other vm. But if i input mkdir pcmk-6 in vm during the 10s,it say :mkdir: cannot create directory `pcmk-6': Read-only file system. Anybody can tell me this situation is due to my wrong configure or libvirt cannot mkdir during migration？thanks!

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[libvirt-users] segfault on snapshot-list, 0.9.13
by Andrey Korolyov 10 Jul '12

10 Jul '12

Hi, virsh crashes when doing snapshot-list: Program received signal SIGSEGV, Segmentation fault. 0x00007f4ba600dc51 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 (gdb) bt #0 0x00007f4ba600dc51 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007f4ba60905b7 in xdr_string () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007f4ba8e92cfe in xdr_remote_nonnull_string (xdrs=<optimized out>, objp=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_protocol.c:31 #3 0x00007f4ba8e93111 in xdr_remote_nonnull_domain (xdrs=0x7fff39fc2db0, objp=0x7fff39fc3010) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_protocol.c:58 #4 0x00007f4ba8e99691 in xdr_remote_domain_list_all_snapshots_args (xdrs=0x7fff39fc2db0, objp=0x7fff39fc3010) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_protocol.c:4549 #5 0x00007f4ba8ea60f7 in virNetMessageEncodePayload (msg=0x1a306c0, filter=0x7f4ba8e99670 <xdr_remote_domain_list_all_snapshots_args>, data=0x7fff39fc3010) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/rpc/virnetmessage.c:351 #6 0x00007f4ba8e9de3f in virNetClientProgramCall (prog=<optimized out>, client=0x1a30ab0, serial=7, proc=274, noutfds=<optimized out>, outfds=0x0, ninfds=0x0, infds=0x0, args_filter=0x7f4ba8e99670 <xdr_remote_domain_list_all_snapshots_args>, args=0x7fff39fc3010, ret_filter=0x7f4ba8e996e0 <xdr_remote_domain_list_all_snapshots_ret>, ret=0x7fff39fc2ff0) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/rpc/virnetclientprogram.c:327 #7 0x00007f4ba8e7f550 in callWithFD (priv=0x1a30400, flags=<optimized out>, fd=<optimized out>, proc_nr=274, args_filter=<optimized out>, args=<optimized out>, ret_filter=0x7f4ba8e996e0 <xdr_remote_domain_list_all_snapshots_ret>, ret=0x7fff39fc2ff0 "", conn=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_driver.c:4799 #8 0x00007f4ba8e7f6a4 in call (priv=<optimized out>, flags=<optimized out>, proc_nr=<optimized out>, args_filter=<optimized out>, args=<optimized out>, ret_filter=<optimized out>, ret=0x7fff39fc2ff0 "", conn=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_driver.c:4820 #9 0x00007f4ba8e8edfd in remoteDomainListAllSnapshots (dom=0x1a300f0, snapshots=0x7fff39fc3218, flags=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/remote/remote_driver.c:4895 #10 0x00007f4ba8e6c36f in virDomainListAllSnapshots (domain=0x1a300f0, snaps=0x7fff39fc3218, flags=0) at /var/tmp/build/libvirt/libvirt-0.9.13/./src/libvirt.c:17262 #11 0x000000000042bca6 in vshSnapshotListCollect (tree=false, flags=0, from=0x0, dom=0x1a300f0, ctl=0x7fff39fc35e0) at /var/tmp/build/libvirt/libvirt-0.9.13/./tools/virsh.c:17198 #12 cmdSnapshotList (ctl=0x7fff39fc35e0, cmd=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./tools/virsh.c:17590 #13 0x000000000040ec92 in vshCommandRun (ctl=0x7fff39fc35e0, cmd=0x1a30f20) at /var/tmp/build/libvirt/libvirt-0.9.13/./tools/virsh.c:19461 #14 0x000000000040bdb0 in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/build/libvirt/libvirt-0.9.13/./tools/virsh.c:21094

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[libvirt-users] What is the procedure of libvirt internal when you run a domain.
by xuanmao_001 10 Jul '12

10 Jul '12

Hi, all. I want to know when I press run button. start a domain. What is the procedure of libvirt internal. I know it will call virDomainCreate(),then qemuDomainStart() -> qemuDomainStartWithFlags(). what is the next? xuanmao_001

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[libvirt-users] Adding a second lv as vm drive: how to set the pci part
by Mauricio Tavares 10 Jul '12

10 Jul '12

Let's say I have a vm, vm1, which has a lv as its hard drive: <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source file='/dev/mapper/kvmtest_vm1_rootvg'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> I could add pickles as a second drive as follows: <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source file='/dev/mapper/kvmtest_pickles'/> <target dev='vdb' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </disk> but I am trying to understand the pci address entry. Must drive be on a different slot?

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