- Users - libvirt List Archives

[libvirt-users] ARP entry intermittently is incorrect for guest - lose connectivity
by Trey Dockendorf 28 Mar '12

28 Mar '12

I've run into a problem on my KVM host where a single guest will be unreachable to other guests on the same host. This host has 2 bridged devices and guests assigned to each have the same issue. I've noticed that when I can't reach the problematic guest, the ARP entry for that system is incorrect. This issue seems to only be a problem about 75% of the time when making connections between the guests. I've checked the logs and haven't seen anything indicating a problem. Here's relavant information, if more is needed please let me know CentOS 6.2 x86_64 libvirt-0.9.4-23.el6_2.4 kernel-2.6.32-220.4.1.el6 # brctl show bridge name bridge id STP enabled interfaces br0 8000.001b21a1cf76 no eth3 vnet0 # Problematic host vnet1 vnet3 vnet4 vnet5 br1 8000.001b21a1ce4d no eth2 vnet6 virbr0 8000.525400a050ba yes virbr0-nic vnet2 # ARP entry when it's the correct MAC <omitted>.tamu.edu ether 52:54:00:e0:1e:6f C eth0 # ARP entry when it's wrong and ping or other connections time out <omitted>.tamu.edu ether 00:1e:c9:bb:cd:d4 C eth0 The MAC ending in cd:d4 does not exist on any system on this network. I've confirmed this with my campus IT who manages the switches and routers. # cat ifcfg-eth3 DEVICE="eth3" HWADDR="00:1B:21:A1:CF:76" NM_CONTROLLED="no" ONBOOT="yes" BRIDGE="br0" # cat ifcfg-br0 DEVICE="br0" ONBOOT="yes" TYPE=Bridge IPADDR="<omitted>" NETMASK="255.255.255.192" GATEWAY="<omitted>" DOMAIN="tamu.edu" # service iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination 13 ACCEPT tcp -- <omitted> 0.0.0.0/0 multiport dports 10050 /* 001 zabbix agent port */ 14 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:53 15 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:53 16 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:67 17 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:67 18 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:16509 19 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:16514 20 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpts:8002:8012 21 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3493 22 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 23 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 24 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 25 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 26 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 ACCEPT all -- 0.0.0.0/0 192.168.122.0/24 state RELATED,ESTABLISHED 2 ACCEPT all -- 192.168.122.0/24 0.0.0.0/0 3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 4 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable 5 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable 6 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 PHYSDEV match --physdev-is-bridged 7 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) num target prot opt source destination Table: mangle Chain PREROUTING (policy ACCEPT) num target prot opt source destination Chain INPUT (policy ACCEPT) num target prot opt source destination Chain FORWARD (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination Chain POSTROUTING (policy ACCEPT) num target prot opt source destination 1 CHECKSUM udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:68 CHECKSUM fill Table: nat Chain PREROUTING (policy ACCEPT) num target prot opt source destination Chain POSTROUTING (policy ACCEPT) num target prot opt source destination 1 MASQUERADE tcp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535 2 MASQUERADE udp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535 3 MASQUERADE all -- 192.168.122.0/24 !192.168.122.0/24 Chain OUTPUT (policy ACCEPT) num target prot opt source destination Thanks - Trey

1 0

[libvirt-users] VM Migration error: got unknown HTTP error code
by vipul borikar 28 Mar '12

28 Mar '12

Hi, I am trying to migrate Fedora12 VM from one RHEL 5.5 host to another RHEL 5.5 Host running Xen Hypervisor I am getting the error : error: got unknown HTTP error code -599690112 I have enabled the (xend-relocation-server yes) on the destination machine. I am able to telnet the 8002 default port from source machine but the connection drops down immediately. I have stopped the firewall on both the machines. I am attaching the Debug log of for libvirt command : virsh -c xen:/// migrate Fedora12 xen://megha/ Any Ideas??? -- Thanks Vipul Borikar "Our task must be to free ourselves...by widening our circle of compassion to embrace all living creatures and the whole of nature and its beauty."

1 0

[libvirt-users] qemu-monitor-command
by Shawn Davis 27 Mar '12

27 Mar '12

Hello Everyone, I am working on a grad school project for virtual introspection. I have a vm running (with 512mb of memory) and want to access the pmemsave function through virsh with the qemu-monitor-command. I am typing the following: virsh qemu-monitor-command --hmp Shawn 'pmemsave 0 536870912 image.dump' Shawn is the name of my vm and image.dump is the name of my output file. No matter what I do, I keep getting: Could not open 'image.dump' I have tried the above with sudo and with the absolute path of where the newly created dump file should go and I still get that error. Any help is appreciated as to how I should enter this command. If I type in virsh qemu-monitor-command --hmp Shawn 'info mem' or any other command without an output path, it works fine and brings up information about my running vm. Regards, Shawn

4 18

[libvirt-users] Cant Update libvirt on fedora 15 i686
by siddharth jain 27 Mar '12

27 Mar '12

I am running Fedora15 on a i386 machine, and using libvirt 0.8.7. I cant update libvirt to 0.9.10 as they have not released 0.9.10 for i386 or i686 machines. need help . -- Siddharth Jain Final year,B.Tech Computer Engineering M.N.I.T Jaipur

3 3

[libvirt-users] simulate "network cable unplugged"
by David Mansfield 26 Mar '12

26 Mar '12

Hi All, Using the virt-manager/libvirtd/qemu-kvm stack (centos 6), is it possible to leave a NIC "installed" but cause it to simulate that the network cable is unplugged? Preferably this could be "hot" plugged/unplugged but otherwise doing it cold. Guest os is also centos 6, in case it matters (shouldn't). Any pointers? Thanks, David Mansfield Cobite, INC.

2 1

Re: [libvirt-users] [libvirt] Problem with Open vSwitch and dnsmasq
by Daniele Milani 26 Mar '12

26 Mar '12

Date: Thu, 22 Mar 2012 11:43:03 -0700 Subject: Re: [libvirt] Problem with Open vSwitch and dnsmasq From: aatteka(a)nicira.com To: dano1988(a)hotmail.it CC: libvir-list(a)redhat.com; roberto.sassu(a)polito.it; paolo.smiraglia(a)polito.it; dev(a)openvswitch.org On Thu, Mar 22, 2012 at 11:11 AM, Daniele Milani <dano1988(a)hotmail.it> wrote: I think I could try the first solution. Can you explain me how do I create the port used by dnsmasq? For example, is it correct to execute # ovs-vsctl add-port virbr1 port2 tag=2 to create a port for the vLan whose tag is 2 named "port2"? Try something like this: ovs-vsctl add-port virbr1 port2 tag=2 ovs-vsctl set Interface port2 type=internal ifconfig port2 10.0.0.1 ifconfig port2 up /usr/sbin/dnsmasq --strict-order --bind-interfaces --except-interface lo --listen-address 10.0.0.1 --dhcp-range 10.0.0.10,10.0.0.20 --dhcp-leasefile=/var/lib/libvirt/dnsmasq/vlan2.leases --dhcp-lease-max=253 --dhcp-no-override Though I have not tested it... I tried the configuration you suggest; and the request is now received by dnsmasq. I executed: ifconfig port2 192.168.100.128 netmask 255.255.255.0 ifconfig port2 up /usr/sbin/dnsmasq --strict-order --bind-interfaces --except-interface lo --listen-address 192.168.100.128 --dhcp-range 192.168.100.129,192.168.100.139 --dhcp-leasefile=/var/lib/libvirt/dnsmasq/vlan2.leases --dhcp-lease-max=11 --dhcp-no-override --log-queries --log-facilities=/path_to_my_file/my_file tailf /path_to_my_file/my_file obtaining the following output: dnsmasq-dhcp[]: DHCPDISCOVER(port2) 52:94:00:02:a7:1e dnsmasq-dhcp[]: DHCPOFFER(port2) 192.168.100.129 52:94:00:02:a7:1e ... dnsmasq-dhcp[]: DHCPDISCOVER(port2) 52:94:00:02:a7:1e dnsmasq-dhcp[]: DHCPOFFER(port2) 192.168.100.129 52:94:00:02:a7:1e ... Now I have a different problem: none DHCP Offer is sent by port2. Do someone know why does it happen and what to do about it? Thanks, Daniele Milani Daniele Milani Date: Thu, 22 Mar 2012 10:54:21 -0700 Subject: Re: [libvirt] Problem with Open vSwitch and dnsmasq From: aatteka(a)nicira.com To: dano1988(a)hotmail.it CC: libvir-list(a)redhat.com; roberto.sassu(a)polito.it On Thu, Mar 22, 2012 at 6:10 AM, Daniele Milani <dano1988(a)hotmail.it> wrote: Dear all, I have the following situation: -I replaced the standard bridge driver with the Open VSwitch one; -I started a NAT-network on Libvirt (bridge name virbr1); -I started a Virtual Machine (VM1) on Libvirt, and I tagged his interface (vnet0) with tag=2; -if I run "# ovs-vsctl show" I obtain: Bridge "virbr1" Port "vnet0" tag: 2 Interface "vnet0" Port "virbr1-nic" Interface "virb1-nic" Port "virbr1" Interface "virbr1" type: internal -the problem is that it is impossible to assign to VM1 an IP, because the dnsmasq daemon does not accept the tagged DHCP Discover frame. Does someone know if there is a way for dnsmasq to accept tagged frames through "virbr1", and send a tagged DHCP Offer packet back to VM1? I believe you would need to run dedicated dnsmasq process instance per each VLAN that you have. By default I guess dnsmasq runs on virbr1, hence it does not see the tagged traffic that comes from vnet0. You could try to: add another port to that bridge with the same VLAN as VM has. And run a separate instance of dnsmasq there; or change the tag of virb1 port, but this might lead to other issues (e.g. then non-tagged VMs will not get DHCP leases). Perhaps someone else can suggest something easier... Greetings, Daniele Milani -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list

2 5

[libvirt-users] Where can I get curl-devel version >=7.18.0 . libvirt 0.9.10 compile error with ESX in CentOs
by li_fuqiong 26 Mar '12

26 Mar '12

To whom maybe concerned: I compile libvirt 0.9.10 in Centos. Command as follows: cd libvirt-0.9.10 ./configure --with-esx throw exception "configure: error: libcurl >= 7.18.0 is required for the ESX driver " yum install curl-devel: but the version is 7.15.5, is older than 7.18.0. Please Help: where can i get curl-devel version>-7.18.0? Thank you. Mark

2 1

[libvirt-users] 转发: Error when executing virsh command to ESX
by li_fuqiong 26 Mar '12

26 Mar '12

To Whom It May concern: I found that the following error is caused by adding a scsi disk to install the os, I remove the scsi disk and the error remove but still report 'out of memory': virsh # dumpxml win2003_122 internal error Invalid or not yet handled value '/vmfs/devices/genscsi/mp x.vmhba0:C0:T1:L0' for VMX entry 'scsi0:1.fileName' virsh # list --all Id Name State ---------------------------------- 80 win2003_122 running - winxp121 shut off virsh # nodeinfo error: failed to get node information error: out of memory virsh # dumpxml win2003_122 error: out of memory li_fuqiong 发件人： li_fuqiong 发送时间： 2012-03-21 15:24 收件人： libvirt-users 主题： Error when executing virsh command to ESX To Whom It May Concern: I use virsh windows 0.9.3 to connect an esx server 4.0 with no_verify=1. The Esx server is intel 2 x 3.19 GHZ CPU, 8G memroy and 2 TB hard disk. following is my execute commands and results. virsh -c esx://xxx.xxx.xxx.x?no_verify=1 virsh # list all Id Name State ---------------------------------- 80 win2003_122 running virsh # nodeinfo error: failed to get node information error: out of memory virsh # dumpxml win2003_122 error: internal error Invalid or not yet handled value '/vmfs/devices/genscsi/mp x.vmhba0:C0:T1:L0' for VMX entry 'scsi0:1.fileName' virsh # edit win2003_122 error: internal error Invalid or not yet handled value '/vmfs/devices/genscsi/mp x.vmhba0:C0:T1:L0' for VMX entry 'scsi0:1.fileName' virsh # destroy win2003_122 Domain win2003_122 destroyed virsh # start win2003_122 Domain win2003_122 started virsh # edit win2003_122 error: internal error Invalid or not yet handled value '/vmfs/devices/genscsi/mp x.vmhba0:C0:T1:L0' for VMX entry 'scsi0:1.fileName' question: 1.Why error when executeing dumpxml and edit command? How to fix it? 2.Why out of memory when nodeinfo. How to fix it? I have only one test vm on my esx server. Thanks in advance. Mark

3 4

Re: [libvirt-users] [libvirt] Problem with Open vSwitch and dnsmasq
by Daniele Milani 23 Mar '12

23 Mar '12

> Date: Thu, 22 Mar 2012 15:11:44 -0400 > From: laine(a)laine.org > To: libvir-list(a)redhat.com > Subject: Re: [libvirt] Problem with Open vSwitch and dnsmasq > > On 03/22/2012 09:10 AM, Daniele Milani wrote: > > Dear all, > > I have the following situation: > > -I replaced the standard bridge driver with the Open VSwitch one; > > I'm curious what you mean by this. > > libvirt's virtual networks currently only support the standard linux > bridge device. There is no code in libvirt to use openvswitch devices > for libvirt's virtual networks. The openvswitch support in libvirt only > applies to guest devices that use <interface type='bridge'>. > > >From your message, it sounds like there is a driver that that replaces > the linux host bridge driver with something that emulates that driver, > but is actually an openvswitch bridge on the backend. I hadn't > previously heard of this. > I did it by installing Open vSwitch with kernel modules: % ./configure --with-linux=/lib/modules/`uname -r`/build after that I replaced the standard linux bridge driver by executing: % rmmod bridge % insmod datapath/linux/brcompat.ko% ovs-brcompatd --pidfile --detachyou can find all this information at: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INST… http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=INST… Daniele Milani > > > -I started a NAT-network on Libvirt (bridge name virbr1); > > -I started a Virtual Machine (VM1) on Libvirt, and I tagged his > > interface (vnet0) with tag=2; > > -if I run "# ovs-vsctl show" I obtain: > > > > Bridge "virbr1" > > Port "vnet0" > > tag: 2 > > Interface "vnet0" > > Port "virbr1-nic" > > Interface "virb1-nic" > > Port "virbr1" > > Interface "virbr1" > > type: internal > > > > -the problem is that it is impossible to assign to VM1 an IP, because > > the dnsmasq daemon does not accept the tagged DHCP Discover frame. > > > > Does someone know if there is a way for dnsmasq to accept tagged > > frames through "virbr1", and send a tagged DHCP Offer packet back to VM1? > > > -- > libvir-list mailing list > libvir-list(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvir-list

1 0

[libvirt-users] HDD- and NIC-stats for dom0
by inge85＠web.de 22 Mar '12

22 Mar '12

1 0