- Users - libvirt List Archives

[libvirt-users] Article about libvirt and audit subsystem
by Marcelo Cerri 21 Sep '12

21 Sep '12

Hi, Sometime ago I wrote an article about libvirt describing how the Linux audit subsystem can be used to track qemu guest's life-cycle. I think this is a topic that can be useful for many people here and so I'm forwarding the URL: http://www.ibm.com/developerworks/linux/library/l-kvm-libvirt-audit/index.h… Regards, Marcelo Cerri

3 3

Re: [libvirt-users] How to pass info to a guest?
by Renich Bon Ciric 21 Sep '12

21 Sep '12

On Thu, Sep 20, 2012 at 12:09 PM, Andrew Cathrow <acathrow(a)redhat.com> wrote: > So you really want to run apt commands on fedora ;-) > > ssh stuff should work fine for you. LOL, ok, you're right. Anyway, thinking it over, I need to apply these injections every time I boot. If the user updates his/her VNC password or rsa-id.pub file on the outside, I need it synced on the inside.

1 0

[libvirt-users] How to pass info to a guest?
by Renich Bon Ciric 21 Sep '12

21 Sep '12

Hello, I would love to be able to pass information to a Guest. For example: - I'd love to sync the root password with the VNC/Spice one - I'd like to be able to inject stuff to /root/.ssh/authorized_keys All of these at boot time. How would I do it? I'd make these files/strings available in the BIOS or something; maybe some kind of storage local to the host and guest as well. Then, I'd create a systemd script that checks these and syncs stuff @ reboot time. I don't know how to make this local storage available or if it is doable to insert this info into some BIOS string; obtainable with dmidecode or something. It would be awesome if this could be dynamic as well. Any feedback is appreciated! -- It's hard to be free... but I love to struggle. Love isn't asked for; it's just given. Respect isn't asked for; it's earned! Renich Bon Ciric http://www.woralelandia.com/ http://www.introbella.com/

3 2

[libvirt-users] How to migrate over TCP without certs
by Renich Bon Ciric 21 Sep '12

21 Sep '12

Hey guys, I have a private network and I trust it! /me hides behind trees... So, in order to exercise my trust, I wanna migrate guests over TCP; with and without shared storage. This is: - I want to migrate from host1 to host2; which have shared storage; over TCP without certs - I want to migrate from host1 to host99, which don't have shared storage, over TCP without certs I am asking because, every time I try anythng, it complains: error: Cannot read CA certificate '/etc/pki/CA/cacert.pem': No such file or directory If I need to setup this cacert, no problem; point me to it! Anyway, thank you for taking the time to read this email. Fedora 17 x86_64 libvirt-0.9.11.5-3.fc17.x86_64 qemu-kvm-1.0.1-1.fc17.x86_64 private network on vlan2, Dual 10 Gbps bonded (20, perhaps?) -- It's hard to be free... but I love to struggle. Love isn't asked for; it's just given. Respect isn't asked for; it's earned! Renich Bon Ciric http://www.woralelandia.com/ http://www.introbella.com/

4 7

[libvirt-users] libvirt network without dns ?
by Scott Moser 21 Sep '12

21 Sep '12

Hey, I've opened a bug against ubuntu at [1]. I realize this is probably not a high priority, but I was just curious if it is possible to have libvirt configure a network and *not* run a DNS server on it (dnsmasq). Perhaps I could convince libvirt to run dnsmasq with '--port 0'? For my explicit use case i was hoping/expecting to run my own dns and dhcp servers, possibly a specific server bound only to that interface (as dnsmasq does). I just wanted libvirt to create the bridge and setup NAT (and automatically bring the network and any configured guests on it up on boot). Heres what I did. $ BRIDGE="mybr0"; IP="192.168.123.1"; $ cat > $BRIDGE.xml <<EOF <network> <name>$BRIDGE</name> <forward mode='nat'/> <bridge name='$BRIDGE' stp='off' delay='0' /> <ip address='$IP' netmask='255.255.255.0'> </ip> </network> EOF $ sudo virsh -c qemu:///system net-define $BRIDGE.xml $ sudo virsh -c qemu:///system net-start $BRIDGE ## See, after 'start' dnsmasq is running and usable on that interface. $ ps axw | grep dnsm | grep $BRIDGE.pid 9888 ? S 0:00 /usr/sbin/dnsmasq -u libvirt-dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/mybr0.pid --conf-file= --except-interface lo --listen-address 192.168.123.1 $ dig +short @$IP www.ubuntu.com 91.189.90.41 -- [1] https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1053408

1 0

[libvirt-users] libvirt and lxc and puppet
by erkan yanar 20 Sep '12

20 Sep '12

Hoi, Im running some hosts with a lot of lxc-containers (lxc-execute). Now Im going to have a look into libvirt. So I wonder: Are there some docs about what lxc@libvirt is supporting? Imho you have a subset of the lxc-capabilities with libvirt. Anyone doing by any chance the same and using puppet to deploy (application)containers? So I could get a recommendation which module to use, instead of writing ma own. Regards Erkan -- über den grenzen muß die freiheit wohl wolkenlos sein

1 0

[libvirt-users] libvirt 0.10 and cephx
by Andrey Korolyov 20 Sep '12

20 Sep '12

Hello, Current version adding 'auth_supported=none' at the end of disk path and failing to do an authentication with specified cephx key: <source protocol='rbd' name='rbd/vmxxxxxxxxx:id=qemukvm:key=[cut]==:auth_supported=cephx'> <host name='10.0.0.13' port='6789'/> <host name='10.0.0.10' port='6789'/> <host name='10.0.0.17' port='6789'/> </source> results to: 0.10.1 -drive file=rbd:rbd/vmxxxxxxxxx-YSG:id=qemukvm:key=[cut]:auth_supported=cephx:auth_supported=none:mon_host=10.0.0.13\:6789\;10.0.0.10\:6789\;10.0.0.17\:6789,if=none,id=drive-virtio-disk0,format=raw,bps_rd=80000000,bps_wr=40000000,iops_rd=400,iops_wr=200 0.9.13 -drive file=rbd:rbd/vmxxxxxxxxx-YSG:id=qemukvm:key=[cut]:auth_supported=cephx:mon_host=10.0.0.13\:6789\;10.0.0.10\:6789\;10.0.0.17\:6789,if=none,id=drive-virtio-disk0,format=raw,bps_rd=80000000,bps_wr=40000000,iops_rd=400,iops_wr=200 In ceph-devel I have mentioned incorrectly that both strings are the same due to incorrect grep statement, so all that needs to be fixed is an wrong parameter at the end. Thanks!

2 1

[libvirt-users] start failure with lxc
by Eric J Nelson 20 Sep '12

20 Sep '12

Hello, I think I've done something to my machine, but I can't seem to figure out what. I have now set up a very simple lxc setup to try and test this. Here is the XML: ~> cat vm1GPU.xml <domain type='lxc'> <name>vm1GPU</name> <memory>1020400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <interface type='bridge'> <source bridge='br0' /> </interface> <filesystem type='mount'> <source dir='/export/vm1gpu/root' /> <target dir='/' /> </filesystem> <console type='pty'/> </devices> </domain> Here is what I get when I try to start it. >sudo virsh --connect lxc:// start vm1GPU error: Failed to start domain vm1GPU error: internal error guest failed to start: 2012-09-19 21:26:48.673+0000: 12702: info : libvirt version: 0.9.10, package: 21.el6_3.4 (CentOS BuildSystem <http://bugs.centos.org>, 2012-08-23-18:28:26, c6b9.bsys.dev.centos.org) 2012-09-19 21:26:48.673+0000: 12702: error : lxcControllerRun:1484 : Failed to query file context on /export/vm1gpu/root: No data available Now if change the target directory to something other than the root it starts right up. Any help would be much appreciated. Thanks! Eric

1 0

[libvirt-users] top output from kvm guest VM
by Harish Patil 19 Sep '12

19 Sep '12

Hello, How can I get 'top' output if the guest VM is stuck spinning and taking 100% cpu. Any other means to debug would be of help. Thanks in adv.

2 1

[libvirt-users] virNodeGetCPUStats and virDomainGetCPUStats have same name in pyton binding as getCPUStats
by Buggi, Harsha 19 Sep '12

19 Sep '12

Hi, virNodeGetCPUStats and virDomainGetCPUStats have same name in pyton binding as getCPUStats virDomainGetCPUStats gets called internally when we use the method getCPUStats. How do we access virNodeGetCPUStats? Regards, Harsha

3 4