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[libvirt-users] libvirtd not accepting connections
by Michael C. Cambria 01 Jun '17

01 Jun '17

Hi, Ever since I recently upgraded to Fedora 25, I can't get kvm working. It's worked on this system since initial fedora 20 install. All upgrades were done via yum, then once available, dnf. I do have libvirt-sock in LISTENING state: STREAM LISTENING /var/run/libvirt/libvirt-sock I noticed I also have multiple connections in CONNECTING state: STREAM CONNECTING 0 /var/run/libvirt/libvirt-sock STREAM CONNECTING 0 /var/run/libvirt/libvirt-sock STREAM CONNECTING 0 /var/run/libvirt/libvirt-sock I rebooted and tried again. Each e.g. 'virsh -c" or virt-manager command I issue, I end up with another socket in CONNECTING state. restarting libvirtd.service close them leaving just one LISTENING strace for virsh -c shows: 4301 socket(AF_UNIX, SOCK_STREAM, 0) = 5 4301 connect(5, {sa_family=AF_UNIX, sun_path="/var/run/libvirt/libvirt-sock"}, 110) = 0 4301 getsockname(5, {sa_family=AF_UNIX}, [128->2]) = 0 4301 futex(0x7f3c0a2e4fc8, FUTEX_WAKE_PRIVATE, 2147483647) = 0 4301 fcntl(5, F_GETFD) = 0 4301 fcntl(5, F_SETFD, FD_CLOEXEC) = 0 4301 fcntl(5, F_GETFL) = 0x2 (flags O_RDWR) 4301 fcntl(5, F_SETFL, O_RDWR|O_NONBLOCK) = 0 systemctl status libvirtd.service and journalctl -f -u libvirtd.service do not show any log entries for libvird after it has been started. e.g. it doesn't log anything about the connection attempts. Anyone have an idea where to look next? Thanks, MikeC

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[libvirt-users] VM memory monitor
by zhunxun＠gmail.com 01 Jun '17

01 Jun '17

Hello，I want to know what the "virsh dommemstat " really stand for?the rss in result really indicatre the physical memory that the VM has used? thanks! zhunxun(a)gmail.com

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[libvirt-users] Hopefully simple question
by Leroy Tennison 31 May '17

31 May '17

Is there a way to determine what the hypervisor default NIC is? I'm using kvm/libvirt/qemu. If this is the wrong forum please please reply with that.

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[libvirt-users] Another hopefully simple question
by Leroy Tennison 31 May '17

31 May '17

Actually the last for now. Is there a way to determine from the hypervisor (kvm/libvirt/qemu) if a VM has unmounted a partition?

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[libvirt-users] can't establish more than 1000 connections with virsh
by dw 26 May '17

26 May '17

Hi: I'm trying to connect with libvirtd with virsh from a remote PC,but only can establish 1000 connections. If try more connections,prompt: "error: failed to connect to the hypervisor error: Failed to open file '/etc/libvirt/libvirt.conf': Too many open files" I tried in another PC,also get the same prompt. Anybody know why? Thanks! environment: libvirt:libvirt-2.0.0-10.el7 OS:centos7.3

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[libvirt-users] nwfilter - how to protect VM's
by Thiago Oliveira 25 May '17

25 May '17

Hello guys! I have just one physical NIC (eth0) and some libvirt networks. Each network created represents one customer and it is working fine. My question is how can I protect between the customer's networks? For example: The host 192.168.2.2 from the network 192.168.2.0/30 can not access any VM in others networks but the 192.168.2.2 can access 192.168.0.1 because it is the gateway to the internet and this host can receive incoming connections from the internet. I would like to tag with VLAN for example but I don't have sure if this is the best way. See below my route table [image: Imagem inline 1] Thank you guys. Thiago

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[libvirt-users] How to show underlying QEMU command line using virsh
by Roman Storozhenko 25 May '17

25 May '17

Hello, everybody I use virt to run my VM's and QEMU as a hypervisor. There is a file describing my virtual machine: /etc/libvirt/qemu/centos7.0.xml As you know it contains xml representation of my VM. Is there any way to show underlying qemu command that virsh runs using that file? For example: qemu-system-x86-64 -m 1024 -smp 2 -... If no, is there any way to figure it out during VM run ? --- Thanks in advance, Roman Storozhenko

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[libvirt-users] How to set guest console size in libvirt configuration options?
by Roman Storozhenko 24 May '17

24 May '17

Hello, everybody I use virsh to run my VM and QEMU as a hypervisor. When I connect to it, it shows me a console with a some predefined size. I know that I am able to update grub configuration to pass the correct size as a kernel command line option or use stty something like: stty rows 62 cols 213 and it's resizes correctly. But is there any way to define the console's size outside the guest, in the VM's configuration? --- Thanks in advance, Roman Storozhenko

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[libvirt-users] How to fit with Apparmor when upgrade to new libvirt version?
by Eddie Yen 24 May '17

24 May '17

Hi everyone, this is my first post at this mailing list. I have a question about upgrading libvirt, but also can fit to Apparmor. For example, I already installed KVM + libvirt from apt-get on Ubuntu 14.04. But the libvirt version is 1.2.9, so I want upgrade to 1.3.4 manually. Search the Internet, only few posts show how to edit so that can launch VM with Apparmor enabled. Most of posts says disable Apparmor is good idea, but I don't want to do that. I already done these things: 1. Replace apparmor profiles from examples/apparmor into /etc/apparmor.d 2. Use --with-apparmor and --with-apparmor-profiles to compile. But I still get virt-aa-helper DENIED message when I try to launch VM. Any ideas? Many thanks, Eddie.

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[libvirt-users] Odd Virsh Capabilities response
by W Kern 23 May '17

23 May '17

Tried to migrate a few VMs from existing system to an older host that we threw in the rack to facilitate some server reshuffling. Migration complained about lack of capabilities (which I expected its an older server) but when I looked at what I should throw into the xml file I got a core2duo when it should have been at least Penryn or something (Xeon E5345) Of course the VMs work fine with that cpu def so its not a bit deal at the moment, but I am still curious Is it some sort of lookup table bug or is the server BIOS wonky? ----------------------------------------------------------- OS: Up to date U16 Xenial on an HP DL380 server. Stock libraries for that distro libvirt0/xenial-updates,now 1.3.1-1ubuntu10.8 amd64 [installed,automatic] qemu-kvm/xenial-updates,xenial-security,now 1:2.5+dfsg-5ubuntu10.14 amd64 [installed,automatic] QEMU Full virtualization cat /proc/cpu shows processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU E5345 @ 2.33GHz stepping : 11 microcode : 0xb4 cpu MHz : 2333.361 # virsh capabilities <capabilities> <host> <uuid>33393138-3335-5553-4538-31324e39414b</uuid> <cpu> <arch>x86_64</arch> <model>core2duo</model> <vendor>Intel</vendor> <topology sockets='2' cores='4' threads='1'/> <feature name='lahf_lm'/> <feature name='dca'/> <feature name='pdcm'/> <feature name='xtpr'/> <feature name='cx16'/> <feature name='tm2'/> <feature name='est'/> <feature name='vmx'/> <feature name='ds_cpl'/> <feature name='dtes64'/> <feature name='pbe'/> <feature name='tm'/> <feature name='ht'/> <feature name='ss'/> <feature name='acpi'/> <feature name='ds'/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='2048'/> </cpu> <power_management> <suspend_mem/> <suspend_disk/> <suspend_hybrid/> </power_management> <migration_features> <live/> <uri_transports> <uri_transport>tcp</uri_transport> <uri_transport>rdma</uri_transport> </uri_transports> </migration_features> <topology> <cells num='1'> <cell id='0'> <memory unit='KiB'>32945368</memory> <pages unit='KiB' size='4'>8236342</pages> <pages unit='KiB' size='2048'>0</pages> <distances> <sibling id='0' value='10'/> </distances> <cpus num='8'> <cpu id='0' socket_id='0' core_id='0' siblings='0'/> <cpu id='1' socket_id='1' core_id='0' siblings='1'/> <cpu id='2' socket_id='0' core_id='2' siblings='2'/> <cpu id='3' socket_id='1' core_id='2' siblings='3'/> <cpu id='4' socket_id='0' core_id='1' siblings='4'/> <cpu id='5' socket_id='1' core_id='1' siblings='5'/> <cpu id='6' socket_id='0' core_id='3' siblings='6'/> <cpu id='7' socket_id='1' core_id='3' siblings='7'/> </cpus> </cell> </cells> </topology>

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