Bhyve

Contents

Bhyve

Documentation

Tutorials

References

Ubuntu 18.04 vs. bhyve (hazardous.org, 2018.5.17)
Install Ubuntu on FreeBSD with byhve (www.davd.eu, 2017.4.2)

Management tools

libvirt

Failed attempt at running bhyve with libvirt

Notes:

For some reason libvirtd does not create a virbr0 bridge. I created bridge0 manually and it seems to work.
I'm using vtnet0 as this FreeBSD machine is already running inside a libvirt.
- It is possible that the host host machine does not support virtualization inside a virtual guest.

Steps:

Configuration:
- FreeBSD version: 12.0-CURRENT r333017
- libvirt version: 4.2.0
Install libvirt and download an ISO installation file of FreeBSD.
Create an img file:
```
truncate -s 20G moinguest.img
```

Configure network:

bridge='bridge0'
eth='vtnet0'

sudo ifconfig tap0 create
sudo sysctl net.link.tap.up_on_open=1
sudo ifconfig "$bridge" create
sudo ifconfig "$bridge" addm "$eth" addm tap0
sudo ifconfig "$bridge" up

Configure host:

for mod in vmm if_tap if_bridge nmdm
do
    if ! kldstat -qn "$mod"
    then
        sudo kldload "$mod"
    fi
done

# Make sure everything is fine.
virt-host-validate bhyve

Create moinguest.xml:

<domain type='bhyve'>
    <name>moinguest</name>
    <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
    <memory unit='GiB'>2</memory>
    <currentMemory unit='GiB'>2</currentMemory>
    <vcpu>1</vcpu>
    <os>
        <type>hvm</type>
    </os>
    <features>
        <apic/>
        <acpi/>
    </features>
    <clock offset='utc'/>
    <on_poweroff>destroy</on_poweroff>
    <on_reboot>restart</on_reboot>
    <on_crash>destroy</on_crash>
    <devices>
        <disk type='file' device='cdrom'>
            <driver name='file' type='raw'/>
            <source file='/usr/home/mpts/h/bhyve/FreeBSD-11.1-RELEASE-amd64-disc1.iso'/>
            <target dev='hdc' bus='sata'/>
            <readonly/>
        </disk>
        <disk type='file'>
            <driver name='file' type='raw'/>
            <source file='/usr/home/mpts/h/bhyve/moinguest.img'/>
            <target dev='hda' bus='sata'/>
        </disk>
        <interface type='bridge'>
            <model type='virtio'/>
            <source bridge="bridge0"/>
        </interface>
        <serial type="nmdm">
            <source master="/dev/nmdm0A" slave="/dev/nmdm0B"/>
        </serial>
    </devices>
</domain>

Start libvirtd:
```
sudo service libvirtd onestart
```

Run guest:

sudo virsh -c 'bhyve:///system' "define /usr/home/mpts/h/bhyve/moinguest.xml"
sudo virsh -c 'bhyve:///system' "start --console moinguest"

and fail:

Domain moinguest defined from /usr/home/mpts/h/bhyve/moinguest.xml

error: Failed to start domain moinguest
error: internal error: Child process (/usr/sbin/bhyveload -m 2048 -d /usr/home/mpts/h/bhyve/moinguest.img moinguest) unexpected exit status 1

Troubleshooting

See what would be executed:

virsh domxml-to-native bhyve-argv domain.xml

CategoryHowTo CategoryVirtualization