cpu-model selection

[ghost]

I just realized that my terraform VM are now spawned with the emulator CPU type.
I tried to figure out how to make qemu/libvirt use 'host-model' as default to workaround that.
My VM are very slow at performing key computations right now.
Do you have any workaround for that or plan to support specifying it ?

[ghost]

I found out that with libvirt 1.3 I can use:
-device virtio-rng-pci
to supply a hardware random number generator to the VM.
Anyway to specify some devices within the terraform resources would be appreciated.

[dmacvicar]

@fisabelle What do you mean with emulator CPU type? Can you paste the ps output that shows the qemu command line libvirt is using?

[ghost]

Hi.
This is what is being used:

/usr/libexec/qemu-kvm -name centos7_vm_domain_78,debug-threads=on -S -machine pc-i440fx-rhel7.2.0,accel=kvm,usb=off -m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 692e3a40-54e3-4921-a27e-77e943ea58e4 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-54-centos7_vm_domain_78/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -no-acpi -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/home/vmstore/ramdisk/centos7_vm_disk_78,format=qcow2,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=45,id=hostnet0,vhost=on,vhostfd=47 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:a1:a3:78,bus=pci.0,addr=0x3 -spice port=5909,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on

For some reason, I'm experiencing long delays during the initialization of a keystore component in my VM. At first I though this to be due to the CPU type selection but it turned out to be due to the default random number generator in the VM, it is very slow to accumulate data.

I noticed that if I use: -device virtio-rng-pci as an extra device in my VM, this process if much faster.

So, this is why I want to be able to specify additional device specifications in the terraform resource file.

Thank you.
François.

[flavio]

I think this bug can be closed, the latest code adds a virtio random generator to all the domains.

[ghost]

That's excellent! I'll try it as soon as possible.

Le 15 oct. 2016 3:17 PM, "Flavio Castelli" notifications@github.com a
écrit :

I think this bug can be closed, the latest code adds a virtio random
generator to all the domains.

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[ghost]

Tried it today. works well for me, thank you.

2016-10-15 15:18 GMT-04:00 François Isabelle francois.isabelle75@gmail.com
:

That's excellent! I'll try it as soon as possible.

Le 15 oct. 2016 3:17 PM, "Flavio Castelli" notifications@github.com a
écrit :

I think this bug can be closed, the latest code adds a virtio random
generator to all the domains.

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