7 votes

probing EDD boot message stays for ten minutes on centos 6.6

I had the same symptoms but the problem was that the vmware console wasn't showing the boot output (after the EDD line and a few minutes, the login prompt suddelny appeared) I added console=tty0 ...
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6 votes

virt-manager doesn't show list of local KVMs but virsh does

Check the output of virsh uri. If it returns qemu:///session, but you're using a qemu:///system connection in Virt-Manager, you found the cause. In order to fix it, you should either create a "...
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  • 207
5 votes
Accepted

virt-manager Spice copy paste doesn't work

You'll need to be sure that you have the libvirt guest utilities installed to your guest operating system, to begin. Also, in order for copy/paste to work, you'll need a SPICE guest agent socket ...
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  • 6,981
3 votes

virt-manager connect to kvm w/o password

I found the solution: virt-manager -c qemu+ssh://username@host1.example.org/system
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  • 123
3 votes
Accepted

Load QEMU Firmware Configuration Device in virt-manager?

I was informed in the mailing list that: ...this will never be implemented into the virt-manager GUI. Fortunately there's a workaround, as it's possible to set this via virt-xml/virt-install. Eg.:...
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  • 358
3 votes
Accepted

Installing a Windows guest with virtio in a single step (Debian)

Prepare a template VM, modify it with a tool like snf-image-creator to install the virtio drivers and sysprep, and clone it: sudo snf-mkimage -f --print-metadata --disable-sysprep=shrink --print-...
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  • 9,165
3 votes
Accepted

probing EDD boot message stays for ten minutes on centos 6.6

You don't have to set this in virt-manager. Add edd=off to the first(!) kernel line inside the VM in /boot/grub/grub.conf, e.g. like so: kernel /vmlinuz-2.6.32-504.1.3.el6.x86_64 ro root=/dev/...
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  • 96.7k
2 votes
Accepted

Is it possible to install virt manager in client mode?

The packages that you do not want to install on your system are pulled in as recommended package, rather than hard dependencies. You can skip the recommends with the --no-install-recommends option to ...
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  • 869
2 votes

virt-manager: Partioning the available memory

As the Redhat documentation you linked about overcommitting memory says, "Guest virtual machines running on a KVM hypervisor do not have dedicated blocks of physical RAM assigned to them. Instead, ...
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  • 154
2 votes
Accepted

Error when adding network interface to VM on KVM host using virsh

Since you already know the exact XML you want for the NIC, you should just avoid the virsh attach-interface command and instead use virsh attach-device. The attach-device command accepts the full XML ...
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  • 1,465
2 votes

virt-viewer not starting up correctly

Found the problem. Problem When I install virt-viewer from yum repository, 1 package is installed and 2 packages are updated. Installing: virt-viewer x86_64 ...
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2 votes

How I increase GPU video RAM in virt-manager?

The qxl video driver is purely emulated, so the choice of graphics drivers used in your host does not have any significant impact on the guest usage. The "video RAM" the guest sees is allocated from ...
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  • 1,465
2 votes

Using virt-builder to create image

e2fsprogs as shipped with CentOS 7 is slightly too old to understand the ext4 filesystem feature metadata_csum with which that disk image was built. Userland support appeared in 1.43 (as the way ...
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2 votes
Accepted

Getting error “libosinfo: Unexpected file type (0)” when trying to create or open VM in virt-manager

Had exactly the same issue. Wrong permissions on "~/.config". Set owner to "user:user" and the error went away...you can check by running "virt-manager --debug" to see ...
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  • 36
2 votes

How do you determine the location of a Vagrantfile from virt-manager?

Based on the template [1], Vagrant does not seem to keep track of the project directory associated with the VM in libvirt domain metadata. Internally Vagrant keeps the info about the VM (including the ...
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  • 106
1 vote
Accepted

QEmu and limit CPU clock vor VM

No. Efficient CPU limiting is done with quotas on time slices, not emulating a different clock. Either would perform not quite like they would unmodified by the hypervisor. CPU performance also has ...
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1 vote
Accepted

Virsh can't detect my new vm

You forgot the virsh command line option --connect qemu:///system. Because you aren't running virsh as root, it defaults to qemu:///session, which shows only VMs running under your user account.
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1 vote

virt-manager vm console requires password

Thanks Michael Hampton for pointing in the right direction. I unchecked the following box to view the console. Remove Console password
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  • 71
1 vote

Docker inside LXC starting container process caused "apply caps: operation not permitted"

For privileged LXC managed by Proxmox this solution helps: lxc.apparmor.profile: unconfined lxc.cgroup.devices.allow: a lxc.cap.drop: Take care about security! Source: Running Docker on Proxmox
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  • 31
1 vote

Missing KVM snapshots in virt-manager

It seems using qemu-img to remove all snapshots from both disks works just fine. At least on a test server, I was able to do the following for all three snapshots on both images: qemu-img snapshot -d ...
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  • 223
1 vote

virt-manager Spice copy paste doesn't work

For those looking for an answer you need to add to the XML file this <devices> <controller type='virtio-serial' index='0'/> <channel type='spicevmc'> <target type='...
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  • 11
1 vote
Accepted

Using virt-manager with seahorse instead of ssh-askpass?

What binary is invoked depends on the SSH_ASKPASS environment variable. You can set it to your seahorse askpass in you rc files, instead of linking on to the other. export SSH_ASKPASS=/usr/lib/...
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  • 9,075
1 vote
Accepted

centos server with virtual machines parent cant connect out but vms work fine

Could you post the output of "brctl show" as well? There are two possible setups: There is an "internal" ip range on virbr0 used by your virtual machines, and your host OS performs NAT All machines ...
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  • 301
1 vote

centos server with virtual machines parent cant connect out but vms work fine

Remove ip address from em1 device and ensure your default route go throw virbr0.
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  • 276
1 vote

virt-manager: Partioning the available memory

Here is my hacky version. Ideas how to improve it, are welcome: List the amount of RAM in kiB every VM needs: hypervisor5:~ # for dom in $(virsh list --all --name); do echo $(virsh dumpxml $dom | ...
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  • 2,964
1 vote

virt-manager: Partioning the available memory

If you want to be really safe and not overcommit memory, an alternative is to enable huge pages on your host and make your virtual machines use them. The downside is that you really need to have all ...
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  • 7,589
1 vote

How to explain the machine type concept in the virtualization?

The machine type (or device model) is a list of low-level devices that should be emulated by default, like a chipset, PCI controller, storage controller, etc. This "device model" is thus the base "...
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1 vote
Accepted

Edit /etc/resolvconf/resolv.conf.d/base in Centos 7 -- qcow2 image

If you want to prevent the DHCP client from overwriting /etc/resolv.conf, you can set PEERDNS=no in the appropriate network configuration file, which in your situation will probably be /etc/sysconfig/...
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  • 40.4k
1 vote

Can libvirtd be used without kvm?

When connecting to a host libvirtd can use a default path for the connection. if i remember that right :///system will be fine, whereas i.e. :///xapi would expect a specific listener.
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1 vote
Accepted

Ubuntu Trusty: virt-manager performance over WAN... 40+ secs freezes

Having upgraded to a more recent version, I can confirm that the slow performance previously experienced is a thing of the past. The version packaged for Ubuntu 'Trusty' is over two years old (0.9.5 ...
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  • 297

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