xen September 2007

xen@lists.fedoraproject.org

39 participants
36 discussions

How is network bridging for Xen handled in F7?
by Christian Reiter 06 Feb '08

06 Feb '08

Hi! Can anybody tell me where i can find docs about handling network bridges for xen domUs in Fedora 7? Something changed since FC6, so i cannot figure out how to create simple bridges without dhcp for my xen domUs. All what i want is: xenbrINTERNET should bridge to eth1 xenbrLAN should bridge to eth0 eth0 and eth1 of my dom0 should also have an IP Address. I do not want routing or nat for my domUs. Thanks! regards, christian

3 7

Guest VM dropping connection.
by Ubaidul Khan 15 Jan '08

15 Jan '08

I am running RHEL5 Guest and Host. The guest OS is dropping network connections occasionally(I noticed my ssh session suddenly terminated). The guest is configured with private network interface and a public network interface. Following are the bridge/network settings for the host: bridge name bridge id STP enabled interfaces xenbr0 8000.feffffffffff no vif2.0 vif1.0 peth0 vif0.0 xenbr1 8000.fefffffffffe no vif2.1 peth1 vif0.3 xenbr1 is dedicated to provide the private network link for the guest os. Following is the guest OS configuration: # Automatically generated xen config file name = "saleen_webvm0" memory = "1000" disk = [ 'tap:aio:/vms/img/redhat/linux/es/5.0/x86_64/saleen_webvm0.img,xvda,w','phy:/dev/sdc,xvdb,w' ] vif = [ 'mac=00:16:3e:2e:6f:e1, bridge=xenbr0','mac=00:16:3e:2f:9e:b1, bridge=xenbr1',] # vif = [ 'mac=00:16:3e:2e:6f:e1, bridge=xenbr0',] vfb = ["type=vnc,vncunused=1"] uuid = "122374dc-26a3-cb0d-99f8-3393e2481777" bootloader="/usr/bin/pygrub" vcpus=2 on_reboot = 'restart' on_crash = 'restart' Following is the output of ifconfig: eth0 Link encap:Ethernet HWaddr 00:14:4F:40:D8:70 inet addr:xxx.xxx.xxx.xxx Bcast:xxx.xxx.xxx.255 Mask:255.255.255.0 inet6 addr: fe80::214:4fff:fe40:d870/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:79313 errors:0 dropped:0 overruns:0 frame:0 TX packets:1167 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:6619719 (6.3 MiB) TX bytes:115448 (112.7 KiB) eth1 Link encap:Ethernet HWaddr 00:14:4F:40:D8:71 inet addr:xxx.xxx.xxx.xxx Bcast:xxx.xxx.xxx.255 Mask:255.255.255.0 inet6 addr: fe80::214:4fff:fe40:d871/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:12 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:720 (720.0 b) peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:105404 errors:0 dropped:0 overruns:0 frame:0 TX packets:13455 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9122426 (8.6 MiB) TX bytes:1997833 (1.9 MiB) Base address:0x8c00 Memory:fa5e0000-fa600000 peth1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FE inet6 addr: fe80::fcff:ffff:feff:fffe/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:9239102 errors:0 dropped:0 overruns:0 frame:0 TX packets:5337342 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:12420212276 (11.5 GiB) TX bytes:523849820 (499.5 MiB) Base address:0x8800 Memory:fa5c0000-fa5e0000 vif1.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:2174 errors:0 dropped:0 overruns:0 frame:0 TX packets:80032 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:446031 (435.5 KiB) TX bytes:6941997 (6.6 MiB) vif2.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:10084 errors:0 dropped:0 overruns:0 frame:0 TX packets:89284 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:1186096 (1.1 MiB) TX bytes:7380350 (7.0 MiB) vif2.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:5337343 errors:0 dropped:0 overruns:0 frame:0 TX packets:9239082 errors:0 dropped:20 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:403712612 (385.0 MiB) TX bytes:12383227754 (11.5 GiB) Any help is greately appreciated. _________________________________________________________________ http://liveearth.msn.com

3 3

ID = VNC Port
by Juerg Ritter 28 Sep '07

28 Sep '07

Hello there! I am wondering if there is a possibility to define that the VNC Port of a virtual machine is always equal to the ID of the machine. That would be very interesting for scripting, and easy to find out on which VNC Display i have to search for a particular machine. Does anybody has an idea? I would like to invoke something like: vncviewer <dom0>:<ID> to connect to this virtual machine. thanks and regards, Juerg

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Fedora 7 kernels
by Jason Solan 28 Sep '07

28 Sep '07

I've had a lot of problems with Fedora 7 and XEN and I've read some messages on this mailing list indicating the F7 kernel is more or less broke with xen. By problems I mean that 32 bit guests on 64 bit dom0 does not work at all for me. Neither paravirtualized (as was a main feature of xen 3.1) or fully virtualized. Combinations I've tried: F7 x86_64 dom0 -> F7 x86 domU PV F7 x86_64 dom0 -> F7 x86 domU HVM RHEL 5 x86_64 dom0 -> F7 x86 domU HVM RHEL 5.1 Beta x86_64 dom0 -> F7 x86 domU PV RHEL 5.1 Beta x86_64 dom0 -> F7 x86 domU HVM RHEL 5 x86 dom0 -> F7 x86 domU PV -- Only one that works (32 on 32 PV) I had read a while ago (June?) that a kernel update would be coming soon to fix the 32 on 64 PV issue, however I've ran in several new kernels and none seem to fix the issue. https://www.redhat.com/archives/fedora-xen/2007-June/msg00031.html I've also repeatedly tried to run a 32 bit HVM fedora 7 guest on 64 bit machines and had that fail similar to this: http://www.redhat.com/archives/fedora-xen/2007-June/msg00094.html Is there any more work planned for Fedora 7 and xen, or should I just wait until F8? Or am I just doing something wrong and the problems I'm having should be working on the current builds? IMPORTANT: This transmission is sent on behalf of Knouse Foods® for business purposes. It is for the intended recipient only. If you are not the intended recipient or a person responsible for delivering this transmission to the intended recipient, you may not disclose, copy or distribute this transmission or take any action in reliance on it. If you received this transmission in error, please notify us immediately by replying to this Email message, and please dispose of and delete this transmission. Thank you.

2 2

Using virt
by Maximilian Freisinger 27 Sep '07

27 Sep '07

Hello, i have some question about virt-manager 1. Where is the script virt-manager uses for installation, and is it possible to modify? 2. Can i set kernelparameter for installation (i would need xfs)? 3. Is it possible to define single lvs as partitions for a new system? THX DC _________________________________________________________________ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE

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Qemu goes bonkers - again!
by John Lagrue 26 Sep '07

26 Sep '07

I had an installation of WinXP that took a long time to install but finally had running fairly well runing from a commandline call to qemu-kvm (though I never have got the hang of how the network the damned thing!) But then, after a recent update, qemu-kvm would crash every time I tried to run it. OK I thought, there's something new, so I tried to create a new VM. I still can't get anything useful to build with WinXP from virt-manager, but did manage to get it to instal by running qemu-kvm from the command line again. And it works fine. Right up to the moment I install XP SP 2. After that, all I get is this: --------------------------------------------------------------- # qemu-kvm -localtime -no-acpi -m 512 CC3_1 Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal error, but for better emulation accuracy either use a 2.6 host Linux kernel or type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root. unhandled vm exit: 0x3f60101 rax 00000000000000b5 rbx 00000000000000b5 rcx 0000000000000000 rdx 000000008053f118 rsi 0000000080551920 rdi 0000000000000000 rsp 00000000804d7000 rbp 000000008053f0a0 r8 0000000000000000 r9 0000000000000000 r10 0000000000000000 r11 0000000000000000 r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 0000000000000000 rip 000000008053f620 rflags 00000002 cs 0008 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type b l 0 g 0 avl 0) ds 0023 (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0) es 0023 (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0) ss 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) fs 0030 (ffdff000/00001fff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0) gs 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 1 type 3 l 0 g 0 avl 0) tr 0028 (80042000/000020ab p 1 dpl 0 db 0 s 0 type 9 l 0 g 0 avl 0) ldt 0000 (00000000/0000ffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0) gdt 8003f000/3ff idt 8003f400/7ff cr0 8001003d cr2 0 cr3 a4a000 cr4 20 cr8 0 efer 0 Aborted --------------------------------------------------------------- I've reinstalled this three times, and it happens every time. Does this mean anything to anyone? JDL

2 1

Creating and installing Centos under virt-manager
by John Lagrue 26 Sep '07

26 Sep '07

All working a treat: created the guest (fully virtualised - I have no time for Xen), setup disk space in a 6Gb file, gave it a name, and pointed the installation source to be the first of 6 .iso files for Centos 5 installation ......then it asks for the second CDRom! How the blazes is one supposed to tell it where to get the file? I'm completely stuck! I thought this was supposed to work with .iso files and I wouldn't have to burn 6 CDs. But what happens now? JDL

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Question: resize graphic console
by David Fischer (DHL US) 25 Sep '07

25 Sep '07

All, The graphics console runs in 800x600 is there an option to change this? thanks -- David R. Fischer Sr Systems Support Engineer DHL Information Services (Americas) 8701 East Hartford Drive Scottsdale, Arizona 85255 USA Contact: +1.480.375.6428 Cell: +1.480.226.3779

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Question: resize graphic console
by David R. Fischer 25 Sep '07

25 Sep '07

All, The graphics console runs in 800x600 is there an option to change this? It is kinda hard to understand how the default of 800x600 is picked up. Is there a configuration file that sets the xen-vncfb setup? thanks David

1 0

Changing CDS
by Reed, Tameika N 24 Sep '07

24 Sep '07

Here is how I did when doing fully virtualized 1. First find out where the iso is mounted : a. Xm block-list domain-name This should return something similar to following: Vdev BE Handle state evt-ch ring-ref BE-path 768 0 0 1 -1 -2 /local/domain/0/backend/vbd/8/768 5632 0 0 1 -1 -1 /local/domain/0/backend/vbd/8/5632 2. Now after finding that out do the following: Xenstore-read /local/domain/0/backend/vbd/8/5632/params This should return: /root/rhel-5-server-i386-disc1.iso or wherever your isos are stored 3. Now can do the following to change which iso should be read: Xenstore-read /local/domain/0/backend/vbd/8/5632/params /root/rhel-5-server-i386-disc2.iso

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xen September 2007