Linux Hypervisor Setup (Libvirt/QEMU/KVM) • Hacker News Board

Re: Linux Hypervisor Setup (Libvirt/QEMU/KVM)

#61

Post by joshspankit » Sun, May 02, 2021, 7:11 PM UTC

egberts1 wrote: post #59

joshspankit wrote: post #50

Earlier quoted context omitted.

I have something very similar, but an Optiplex. One thing I had to do recently though is swap pfsense for Untangle because of drastically better FQ-CoDel implementation in Untangle.

I went over to Untangle website for any data sheet but was unable to get one immediately (have to fork over everything but your youngest child, so to speak in order to get it. Not sure why would one even do that. :-(

I don’t want to sidetrack this in to an Untangle conversation, but yes: it’s fundamentally not free as in speech while also being supported as though it’s just a thin shell over Debian.

However, the YouTube breakdown by Battle(non)sense was conclusive (and is confirmed in my case in undeniable ways) so I switched.

Re: Linux Hypervisor Setup (Libvirt/QEMU/KVM)

#62

Post by madjam002 » Sun, May 02, 2021, 7:47 PM UTC

sneak wrote: post #28

madjam002 wrote: post #21

Earlier quoted context omitted.

You mention Terraform, I'm using https://github.com/dmacvicar/terraform-provider-libvirt quite heavily and it works a treat.

That's the one I've had suboptimal experience with. Maybe I need to learn it better. What kind of storage are you using it with? I ran into issues using file-backed trying to keep everything in tf.

I’m copying qcow2 volumes with it to file based storage and some Ceph RBD as well, I mean AFAIK it just talks to the standard libvirt volumes interface so anything you can do with that you can do with the Terraform provider.

Re: Linux Hypervisor Setup (Libvirt/QEMU/KVM)

#63

Post by linsomniac » Mon, May 03, 2021, 5:49 PM UTC

R0b0t1 wrote: post #47

linsomniac wrote: post #43

Earlier quoted context omitted.

It's been probably a decade since I've used libvirt, but I can say why I like using ganeti: - I can get a list of the host machines in my cluster and how much memory and storage they have available. - I can easily move VMs between hosts if I want to evacuate a host for hardware/software/firmware maintenance. - It has the ability to set up DRBD backed VMs and live migrate between the host nodes. - List what machines a…

> - Start and stop commmands don't require me to remember the settings on individual VMs, the qemu commands that get run are something like 700 characters long. Shouldn't be the case. I put my VM args into a script, but it's only like 20 lines?

Actually, looks like I under-estimated by half. One of the random VMs I run has a command-line 1361 bytes long. Here it is sanitized:

qemu-system-x86_64 -enable-kvm -name hostname.domain -m 4096 -smp 2 -pidfile /var/run/ganeti/kvm-hypervisor/pid/hostname.domain-device virtio-balloon -daemonize -D /var/log/ganeti/kvm/hostname.domain.com.log -machine pc-i440fx-bionic -monitor unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.domain.com.monitor,server,nowait -serial unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.domain.com.serial,server,nowait -usb -usbdevicetablet -vnc 127.0.0.1:5156 -chroot /var/run/ganeti/kvm-hypervisor/chroot/hostname.domain.com -uuid 3d9ea1c9-33ce-4e06-81d3-a97005b89e4b -netdev type=tap,id=nic-19f31fbd-f5de-4b57,fd=9 -device virtio-net-pci,bus=pci.0,id=nic-19f31fbd-f5de-4b57,addr=0xd,netdev=nic-19f31fbd-f5de-4b57,mac=aa:00:00:XX:XX:XX -netdev type=tap,id=nic-0e7f0c3a-e19b-4ae2,fd=12 -device virtio-net-pci,bus=pci.0,id=nic-0e7f0c3a-e19b-4ae2,addr=0xe,netdev=nic-0e7f0c3a-e19b-4ae2,mac=aa:00:00:XX:XX:XX -qmp unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.domain.com.qmp,server,nowait -qmp unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.domain.com.kvmd,server,nowait -bootc -device virtio-blk-pci,bus=pci.0,id=disk-066d688d-9f5a-4ca5,addr=0xc,drive=disk-066d688d-9f5a-4ca5 -drivefile=/var/run/ganeti/instance-disks/hostname.domain.com:0,format=raw,if=none,id=disk-066d688d-9f5a-4ca5 -S -runas kvm37

Re: Linux Hypervisor Setup (Libvirt/QEMU/KVM)

#64

Post by xrd » Mon, May 03, 2021, 6:23 PM UTC

xrd wrote: post #52

I've been struggling to run Windows VMs on Linux for a while. Are any of these tools a good option for that? I've installed a Windows VM more times than I can count and it hangs after 20-30 minutes of waiting. If anyone has a suggestion for an all in one tool that can help with this, I'm all ears.

cockpit worked great!