June 2008 - Devel - libvirt List Archives

[libvirt] [PATCH] QEMU & remote support for virDomainBlockPeek
by Richard W.M. Jones 05 Jun '08

05 Jun '08

This patch adds support for virDomainBlockPeek over remote. Also adds a QEMU driver implementation. Also there is a minor fix in the Xen driver impl. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top

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[libvirt] Workshop Virtualization Technologies in Essen, Germany
by Henning Sprang 04 Jun '08

04 Jun '08

Hello everybody! For the third time, I arranged a "Workshop on Virtualization Technologies" in cooperation with the Linuxhotel in Essen, Germany. Our goal is, to provide developers of Open Source Software related to virtualization, and interested, skilled administrators with the possibility to come together for a weekend to work on their projects, exchange experiences and play around with the technology. The Linuxhotel as a location delivers a great, relaxed athmosphere and a perfect infrastructure to enable carefree working. Details - currently in German only - here: https://wiki.villa-vogelsang.de/doku.php?id=virtualisierung:start It's no problems to attend the workshop if you're not speaking german - please let me know if you're interested, and I'll give you more info on the details - basically it is, if you are an OpenSource developer in a virtualization related field, you can attend for free, otherwise you have to pay a flat fee of 135 Euros. We're looking for sponsors to see if we can get to reimburse travel costs for the Open Source developers. I'd be glad to see you there! Registration will be by first come-first serve principle - the event will be limited to 20 Persons. Henning Sprang -- Henning Sprang http://www.sprang.de | http://lazyb0y.blogspot.com/

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[libvirt] [PATCH][DOC] update Driver support matrix for Xen
by Atsushi SAKAI 04 Jun '08

04 Jun '08

Hi, Since Cole develops autostart for Xen, I update the Driver suport matrix. hvsupport.html | 6 +++--- hvsupport.html.in | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) Thanks Atsushi SAKAI

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[libvirt] remote access libvirtd / bindings for php/asp
by Stefan de Konink 04 Jun '08

04 Jun '08

Hi, A few people around me want to use php or asp to access libvirtd. Along this wish is to access it as 'proxy' for the entire cluster (this is where I come in). My target it to make a proxy for libvirtd that allows all host in the network to be managed by any libvirtd instance that has the sufficient certificate. Now it seems clear that this dispatch/proxy functions are doable. But what I wonder about is the actual access to libvirtd. There seems to be a pretty big warning about the XDR/ RPC calls. My people would like to see bindings to connect to libvirtd by php or asp/.net, is there any progress on that one? Stefan

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[libvirt] ANNOUNCE: virt-mem: tools for monitoring virtual machines
by Richard W.M. Jones 03 Jun '08

03 Jun '08

I'm pleased to announce this very early pre-alpha release of a further set of tools for monitoring virtual machines. The idea is to provide simple commands which can be run outside the virtual machine to monitor its status. These commands don't require you to log in to the virtual machine, or to install any software, since they work entirely by snooping. So they could be very useful for analyzing guests which are stuck / unresponsive / heavily loaded. Done so far: virt-uname like uname(1), print guest's system information virt-dmesg like dmesg(1), print guest's kernel messages Coming soon: virt-ps like ps(1), lists processes virt-free like free(1), lists free memory and swap If virt-ps works out, I might do a 'top'-like command, although of course I can't call it virt-top. I'm open to other suggestions too. Home page: http://et.redhat.com/~rjones/virt-mem/ Source: http://hg.et.redhat.com/virt/applications/virt-mem--devel ****NOTE**** These require a (forthcoming) patch to libvirt to snoop on virtual machines' memory. At the moment you can run them by using the QEMU memsave command to snapshot kernel memory to a file, and then run the program on the file. The snapshot process is described here: http://felinemenace.org/~andrewg/MikroTik_Router_Security_Analysis_Part2/ Support for Xen is still under investigation, but we believe it should be possible. Example: (qemu) memsave 3222274048 15728640 snap.mem $ virt-uname -A i386 -T i386 -t ~/snap.mem /home/rjones/snap.mem: Linux localhost.localdomain 2.6.24-0.155.rc7.git6.fc9 #1 SMP Tue Jan 15 17:52:31 EST 2008 i686 (none) Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v

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[libvirt] [PATCH] kvm 32bit guest on 64bit host
by Gerd von Egidy 03 Jun '08

03 Jun '08

Hi, I want to manage a 32 bit i686 guest on an x86_64 host with kvm and libvirt. KVM is perfectly capable of doing this (look e.g. at http://kvm.qumranet.com/kvmwiki/Guest_Support_Status) but libvirt did not allow it. So I created the attached patch to allow it and make it easy to extend the capabilities of kvm and kqemu later on. I did not add anything I'm not sure about, so I did not at 64bit guest on 32bit host (though the page linked above seems to indicate that it works) and did not change the capabilities of kqemu at all (because I don't have any experience with it and never used it). Please consider merging. Kind regards, Gerd -- Address (better: trap) for people I really don't want to get mail from: james(a)cactusamerica.com

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[libvirt] KVM migration patch
by Richard W.M. Jones 03 Jun '08

03 Jun '08

I've just updated this patch so it can be applied to CVS. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/

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[libvirt] Support for passing arbitrary qemu/kvm admin console commands?
by Charles Duffy 03 Jun '08

03 Jun '08

I'm looking at building a framework which makes use of KVM's pseudo-migration support for snapshot management. To my knowledge, this functionality is not presently available through libvirt. Is it possible to send arbitrary qemu/kvm admin console commands to a VM started and controlled by libvirt, or does any requirement for funtionality not presently exposed through libvirt conflict with its use? Thanks!

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[libvirt] [PATCH] Add error message when the invalid XML file is defined.
by Hiroyuki Kaguchi 03 Jun '08

03 Jun '08

Hi, When cpuset that is the attribute of vcpu tag of the XML file is the invalid string, "virsh define" succeeds. (Ex. <vcpu cpuset='aaa'>4</vcpu> <vcpu cpuset=' '>4</vcpu> <vcpu cpuset=',,,'>4</vcpu> ) The patch changes policy that the definition is failed and shows error message. Thanks, Signed-off-by: Hiroyuki Kaguchi <fj7025cf(a)aa.jp.fujitsu.com> Index: src/xm_internal.c =================================================================== RCS file: /data/cvs/libvirt/src/xm_internal.c,v retrieving revision 1.79 diff -u -p -r1.79 xm_internal.c --- src/xm_internal.c 29 May 2008 19:20:23 -0000 1.79 +++ src/xm_internal.c 30 May 2008 05:27:35 -0000 @@ -2004,20 +2004,15 @@ virConfPtr xenXMParseXMLToConfig(virConn char *ranges; ranges = virConvertCpuSet(conn, cpus, 0); - if (ranges != NULL) { - VIR_FREE(cpus); - if (xenXMConfigSetString(conf, "cpus", ranges) < 0) { - VIR_FREE(ranges); - goto error; - } + VIR_FREE(cpus); + if (ranges == NULL) { + goto error; + } + if (xenXMConfigSetString(conf, "cpus", ranges) < 0) { VIR_FREE(ranges); - } else { - if (xenXMConfigSetString(conf, "cpus", cpus) < 0) { - VIR_FREE(cpus); - goto error; - } - VIR_FREE(cpus); + goto error; } + VIR_FREE(ranges); } obj = xmlXPathEval(BAD_CAST "string(/domain/os/type)", ctxt);

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[libvirt] network unreachable on XEN guest
by Kenneth Nagin 03 Jun '08

03 Jun '08

I created a new network based on the default network. However the network is unreachable to the XEN guest. I used net-dumpxml to print the "default" xml. I changed the network XML network name, bridge name, and uuid and successfully created a new network. I replaced source network attribute in the domain creation XML to point to the new network name. However, the guest can not properly initialize eth0 because the new network is unreachable. It tries to ping the ip assigned to the new bridge but fails. The same guest created with the default network works fine, i.e. it can access the network. This what network restart looks like on the guest (I'm not sure if this will be visible on the forum): (Embedded image moved to file: pic26442.jpg) This is a copy of the network XML: <network> <name>test-net1</name> <uuid>7cfbfa88-542f-44c7-bbc1-3e19f67d8ca6</uuid> <forward mode='nat'/> <bridge name='test-br1' stp='on' forwardDelay='0' /> <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> </dhcp> </ip> </network> This the interface segment domain creation XML: <interface type='network'>  <source network='test-net1'/> <script path='vif-bridge'/> </interface> This is the relevant ifconfig on host: .... test-br1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:81 errors:0 dropped:0 overruns:0 frame:0 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:9768 (9.5 KiB) TX bytes:5018 (4.9 KiB) vif13.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:90 errors:0 dropped:0 overruns:0 frame:0 TX packets:194 errors:0 dropped:2771 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:11136 (10.8 KiB) TX bytes:10122 (9.8 KiB) virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:365 errors:0 dropped:0 overruns:0 frame:0 TX packets:3291 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:34127 (33.3 KiB) TX bytes:512877 (500.8 KiB) This the brctl show output: bridge name bridge id STP enabled interfaces br1 8000.000000000000 no eth1 8000.001a64a12e56 no peth1 test-br1 8000.feffffffffff yes vif13.0 virbr0 8000.000000000000 yes What am I missing? Thanks in advance. -Kenneth Nagin

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