NAS TrueNAS FreeBSD

【TrueNAS】虚拟机

Posted by 西维蜀黍 on 2021-03-12, Last Modified on 2022-02-19

Install VM

Tips

  1. Use VirtIO (which use semi-virtualised tech under the real NIC and thus provide higher performance, compared with Intel e82585 (e1000))
    • Emulating an Intel e82545 (e1000) Ethernet card provides compatibility with most operating systems. Change to VirtIO to provide better performance on systems with VirtIO paravirtualized network driver support.
  2. CPU setting

Demo

Install Ubuntu

https://www.youtube.com/watch?v=YQ1nO9zZ5rE

Troubleshooting

I have a problem when install vritual xubuntu 20.04, the error that appear in VNC client is

Initramfs unpacking failed: write error
ACPI error: Could not enable RealTimeClock Event
Failed to execute /init (error-2)
Kernel panic - not syncing: No working init found. Try passing init= option to kernel See Linux documentation
....other information....

​ Solution: set the memory to be at least 1GB (previously I set to be 512MB, which leads to this error)

Manage VMs

Pre-requisition

vmm

vmm.ko – bhyve virtual machine monitor

To load the driver as module at boot, add this line to loader.conf(5):

vmm_load="YES"

The module can also be loaded manually with kldload(8):

kldload vmm

List VMs

$ ls -al /dev/vmm
total 1
dr-xr-xr-x   2 root  wheel    512 Mar 12 13:55 .
dr-xr-xr-x  24 root  wheel    512 Mar 12 12:41 ..
crw-------   1 root  wheel  0x119 Mar 12 14:15 4_TrueNASUbuntu4

Creation

bhyveload

bhyveload – load a FreeBSD guest inside a bhyve virtual machine

To load a FreeBSD kernel from disk image vm0.img with 256M RAM and the name vm0:

$ /usr/sbin/bhyveload -m 256 -d ./vm0.img vm0

This will show the FreeBSD loader screen and you should see the device /dev/vmm/vm0

bhyve

To boot the VM with 2 vCPUs, the same 256M RAM and the tap0 network interface:dfd

/usr/sbin/bhyve -c 2 -m 256 -A -H -P \
-s 0:0,hostbridge \
-s 1:0,virtio-net,tap0 \
-s 2:0,ahci-hd,./vm0.img \
-s 31,lpc -l com1,stdio \
vm0

Manage VMs

bhyvectl

The bhyvectl command is a control utility for active bhyve(8) virtual machine instances, e.g., see CPU usage

$ bhyvectl --vm=<vmname>

# Retrieve statistics for the specified	VM.
$ bhyvectl --vm=<vmname> --get-stats

A specified virtual machine can be destroyed using bhyvectl:

$ bhyvectl --destroy --vm=<vmname>

vm-bhyve

Validation

Since 3.2.0 the virt-host-validate(1) supports the bhyve host validation and could be used like this:

$ virt-host-validate bhyve
 BHYVE: Checking for vmm module                                              : PASS
 BHYVE: Checking for if_tap module                                           : PASS
 BHYVE: Checking for if_bridge module                                        : PASS
 BHYVE: Checking for nmdm module                                             : PASS
$

Reference

Troubleshooting

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