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BVM(8) System Manager's Manual BVM(8) NAME bvm -- Bhyve Virtual machines Management tool SYNOPSIS bvm --help bvm --version bvm --create name [from template-name [-s | -U=N | -m=SIZE | -d=SIZE | -n=MODE | -i=NIC]] bvm --config name bvm --vminfo name bvm --showstats name bvm bvm --os bvm --log [name [-e | -n=N | -a]] bvm --ls [byname | byos | bystatus | online] bvm --ll [byname | byip | byos | bystatus | online] bvm --login name bvm --start name bvm --restart name bvm --reboot name bvm --stop name bvm --poweroff name bvm --set-hd-boot name bvm --clone name new-name bvm --remove name ... bvm --rename name new-name bvm --encrypt name bvm --decrypt name bvm --lock name bvm --unlock name bvm --lockall bvm --unlockall bvm --addisk name bvm --deldisk name bvm --abinfo bvm --autoboot bvm --reload-nat bvm --setnat Nat ip/mask bvm --setsw Switch ip/mask bvm --unsetsw Switch bvm --setpr ip bvm --showpr bvm --showdhcp bvm --showdev bvm --showdevuse bvm --showdevall bvm --snapshot name bvm --rollback name bvm --showsnap name bvm --showsnapall bvm --pci bvm --passthru bvm --netstat DESCRIPTION The bvm is a bhyve(8) virtual machine management tool based on FreeBSD that allows you to easily manage virtual machines. The virtual machine's network is handled by one or more virtual switches. Each switch has a simple name, which is stored in the corresponding config- uration file and can be modified by the bvm create one or more bridge(4) devices for each virtual switch and dynamically assign them to the virtual machine tap(4) interface. When the virtual machine is shut down normally, the bvm will automatically clean up the useless network devices. The bvm supports multiple network cards and multiple hard disks. Each vir- tual machine can have multiple network cards or multiple hard disks, and can easily add, delete, and modify network cards or hard disks. BASIC SETUP Once bvm is installed, the first thing you have to do is set up the virtual machine's storage directory. Edit the value of vmdir in /usr/local/etc/bvm/bvm.conf vmdir=/your/vm/dir/ If you want to automatically boot the specified list of virtual machines in order while the host is booting, add the following lines to /etc/rc.conf to enable: bvmd_enable="YES" OPTIONS --abinfo Show information for all auto-bootstrap virtual machines. --addisk name Add a hard disk to the virtual machine. --autoboot Start the automatic booting virtual machine in order. Boot option, which is usually not required in administrator manual maintenance mode. Sometimes the host is powered on again after shutdown or un- expected downtime. At this time, the administrator-set virtual ma- chine can be automatically started by the rc script. The method is to use bvm --config to modify the default value of the auto boot menu to yes. In self-start mode, bvm will refer to the boot level and delay op- tions of vm. The boot level is the boot priority. When there are multiple self-starting virtual machines, the lower the startup pri- ority, the more the virtual machine starts. Back to front. Boot time (boot time) After starting the current virtual machine, it can also be said that the number of seconds is tentative before start- ing the next virtual machine. The reason for designing these two parameters is because some services may need to be activated first to ensure normal business. For example, the relationship between the database and the web ser- vice, if the data virtual machine library is not prioritized, it may cause the web service to be abnormal! The correct way to use this option is to add the startup script: # sysrc bvmd_enable=yes --clone name new-name Clone a new virtual machine from an existing virtual machine. --config name Edit the configuration of the virtual machine. This option needs to be used in the case of a virtual machine. Options that allow users to configure independently are: cpus, ram, iso path, boot from, hostbridge, uefi, TPM, VNC settings, shared folder, audio, auto boot, disk config, and network config. cpus The total number of virtual CPUs used by the current virtual machine. ram The size of the memory requested by the current virtual machine, the unit of which can be M/G, etc. iso path The directory where the iso disc image is lo- cated (is the directory, non-iso absolute ad- dress). When the directory is specified, bvm will automatically list the iso files contained in the current directory. The user can select the menu number. boot from This is an important option. When the system is first installed, bvm will automatically adjust this option to hd0 for system startup. When you need to use iso disc for system maintenance, you can change this option to cd0. CD Enable or disable CD-ROM support (on/off). cd numbers Number of CD-ROM drives (1-4). Multiple CDs are useful for scenarios like Windows driver instal- lation. cd(N) iso ISO path for CD N. Enter '-' or 'none' to clear the ISO path for cd1-cd3. The cd(0) is required and cannot be cleared when CD is enabled. boot type Select the boot method. Options are: grub Standard Bhyve loader (bhyveload/grub-bhyve). Recommended for most BSD and Linux VMs. uefi UEFI boot mode. Required for Windows and some modern Linux distributions. Often used with VNC for GUI. uefi_csm UEFI Compatibility Support Module (Provides Legacy BIOS compatibil- ity). Note: UEFI modes might have limited console sup- port with --login depending on the guest OS con- figuration. TPM (UEFI) Enable TPM 2.0 (Trusted Platform Module) sup- port. This is required for Windows 11 installa- tion and needs UEFI boot mode. The swtpm package must be installed on the host. VNC settings VNC configuration includes bind address (default 0.0.0.0), port number, display resolution (width/height), optional password protection, and wait option (wait for VNC connection before boot). audio Enable HDA audio device support for the virtual machine. Requires /dev/dsp0 on the host. auto boot See --autoboot for details. hostbridge This is a schema attribute whose attribute value should be hostbridge when using the Intel system CPU; its attribute value should be amd_host- bridge when using the AMD series CPU. disk config The option can add or delete the hard disk of the current virtual machine. Supports multiple storage interfaces: ahci-hd (AHCI), virtio-blk (VirtIO Block), and nvme (NVM Express). If you only want to add the hard disk, it is recom- mended to use bvm --addisk shortcut command. shared folder VirtIO-9P file sharing. This option allows shar- ing host directories with the virtual machine. When enabled, you can set the share name (used in guest to identify the share), share path (host directory to share), and read-only mode. Linux guests can mount the share using: mount -t 9p -o trans=virtio sharename /mnt/point Note: FreeBSD 14 guests lack virtio_p9fs sup- port; FreeBSD 15+ has full support. passthru PCI passthrough. This option allows passing physical PCI devices directly to the virtual ma- chine for exclusive use (e.g., GPU, network cards). Prerequisites: CPU must support Intel VT-d or AMD-Vi. Device must support MSI/MSI-x interrupts and be reserved in /boot/loader.conf (pptdevs="bus/slot/func"). When enabled, BVM automatically detects available passthrough de- vices and displays them in a selection list. Only devices bound to the ppt driver and not al- located to other VMs will appear. Configuration options: passthru (on/off), ppt devices (1-8), ppt(N) device (select from list). When enabled, bhyve uses -S flag to wire guest memory. Use 'bvm --pci' to find device addresses. network config This option allows you to configure the network- ing of virtual machines. Supports Bridge, NAT, and Switch network modes with built-in DHCP server. --create name [from template-name [options]] Create a new virtual machine. # bvm --create vm1 # bvm --create vm2 from vm1 # bvm --create vm3 from Linux -s -U=4 -m=512m -d=10g -n=bridge -i=em0 Standard templates available: freebsd FreeBSD standard configuration. linux Linux standard configuration. windows Windows standard configuration. You can also use any existing VM name as a template. When using from to create from a template, optional parameters can override template settings: -s Set boot type to grub. -U=N Set CPU count (e.g. -U=4). -m=SIZE Set memory size (e.g. -m=512m, -m=2g). -d=SIZE Set first disk size (e.g. -d=10g, -d=1t). -n=MODE Set network mode (bridge or nat). -i=NIC Set bind NIC (e.g. -i=em0). --deldisk name Delete the disks in the virtual machine. --decrypt name Decrypt the virtual machine. --encrypt name Encrypt the virtual machine. --help Show all options and descriptions. --login name Login to a running virtual machine from the console. For UEFI mode, console support depends on the guest OS configuration; if it fails, please use the VNC client or SSH. To enable serial console output in guest OS: Debian/Ubuntu Edit /etc/default/grub, set GRUB_CMD- LINE_LINUX="console=tty0 con- sole=ttyS0,115200", then run update-grub and reboot. RHEL/CentOS/AlmaLinux Edit /etc/default/grub, add "console=tty0 console=ttyS0,115200" to GRUB_CMDLINE_LINUX. Remove "rhgb quiet" for full boot messages. Run grub2-mkconfig -o /boot/efi/EFI/cen- tos/grub.cfg (adjust path for distro) and re- boot. Fedora Same as RHEL, but use path /boot/grub2/grub.cfg. openSUSE Edit /etc/default/grub, add "console=tty0 console=ttyS0,115200" to GRUB_CMD- LINE_LINUX_DEFAULT. Remove "splash=silent quiet" for full boot messages. Run grub2-mk- config -o /boot/grub2/grub.cfg and reboot. OpenBSD Modify /etc/boot.conf: echo "set tty com0" >> /etc/boot.conf echo "stty com0 115200" >> /etc/boot.conf Enable login in /etc/ttys: Find 'tty00' line, change 'std.9600' to 'std.115200', 'unknown' to 'vt100', and 'off' to 'on secure'. --ls [byname | byos | bystatus | online] Show a list and status of all virtual machines. By default, the output is sorted in ascending order by name, or one of the follow- ing options is specified. byname Output list in ascending order by name. byos Output list in ascending order by OS. bystatus Output list in ascending order by virtual ma- chine status. online Only show running virtual machines. # bvm --ls byos NAME GUEST CPU MEMORY DISK STATE c Debian 1 512M [2]5.5G off d Debian 1 512M [1]5G off * abc Debian 1 512M [1]10G on b FreeBSD 1 1G [1]10G off bb FreeBSD 1 1G [1]10G off # bvm --ls NAME GUEST CPU MEMORY DISK STATE abc Debian 1 512M [1]10G on b FreeBSD 1 1G [1]10G off bb FreeBSD 1 1G [1]10G off c Debian 1 512M [2]5.5G off d Debian 1 512M [1]5G off * The meaning of the list items is as follows: NAME The name of the virtual machine. GUEST Virtual machine operating system. CPU Number of CPUs. MEMORY Size of memory. DISK Disk capacity, the number in square brackets represents the number of disks, and the capacity is the sum of all disk capacities. STATE The state of the virtual machine, off or on, if the virtual machine is locked, a yellow symbol '*' is also displayed, if the virtual machine is encrypted, a red symbol '*' is also displayed. --ll [byname | byip | byos | bystatus | online] Show a list and status of all virtual machines in long format. By default, the output is sorted in ascending order by name, or one of the following options is specified. byname Output list in ascending order by name. byip Output list in ascending order by IP-addr. byos Output list in ascending order by OS. bystatus Output list in ascending order by virtual ma- chine status. online Only show running virtual machines. The added list items have the following meanings: IP The IP address of the virtual machine. LOADER The boot loader for the virtual machine. AUTOSTART The state in which the virtual machine is auto- matically started, "Yes" is automatically started, and the number next to it is the startup sequence. --lock name Locks the specified virtual machine, and can't --config , --remove , --start , and so on. Only simple read operations can be per- formed, such as --vminfo , --ls , this option also prevents the risk of virtual machine files being accidentally deleted. --lockall Lock all virtual machines, behaving the same as --lock. --netstat Show all network configuration information of virtual machines, in- cluding NIC, mode, IP address, gateway, port forwarding, bridge, and TAP device, etc. --os Show a list of operating systems supported by bvm. --log [name [-e | -n=N | -a]] Show VM log entries. -e Show error logs only. -n=N Show last N lines (default: 50). -a Show all logs (no line limit). --passthru Show PCI passthrough device list. Displays all PCI devices that are bound to the ppt driver and ready for passthrough to virtual ma- chines. Devices shown as "Passthru Ready" can be assigned to VMs, while "Allocated" devices are currently in use by a running VM. --pci Show all host PCI devices. Displays a complete list of PCI devices on the host system, including their bus/slot/function addresses, driver, vendor, device name, and class information. --poweroff name Force the virtual machine to power off. When there are some special reasons that prevent the virtual machine from shutting down prop- erly, you need to use this option to force the virtual machine to power off. --reload-nat Reload the NAT port redirect. In general, you do not need to use this option, bvm will automatically handle port redirection, this option is manual mode. --remove name ... Destroy one or more virtual machines and they cannot be recovered. Note that the virtual machines cannot be running when you run this command. --rename name new-name Rename the virtual machine. --restart name Restart a virtual machine. --reboot name Restart a virtual machine (alias for --restart). --rollback name Roll back to the snapshot point. --set-hd-boot name Set the virtual machine to boot from the hard disk. --setnat nat ip/mask Set the IP address and mask of the NAT. # bvm --setnat nat0 172.16.1.1/24 --setpr ip Port redirection is set dynamically with immediate effect. In gen- eral, the virtual machine must be turned off to set the virtual ma- chine parameters, but this option can set the port redirection at any time in the virtual machine on state, and take effect immedi- ately. # bvm --setpr 10.10.30.10 --showpr Show all list of port redirect. # bvm --showpr PROTO VM IP:PORT HOST PORT VM NAME tcp 172.16.1.10:22 2224 freebsd-14 tcp 172.16.1.10:80 8080 freebsd-14 udp 192.168.1.254:53 9953 abc tcp 10.10.30.10:22 3322 ob --setsw switch ip/mask Set the ip address and mask of the virtual switch. The same method as --setnat. --showdev Select a network device and show its relationship to the virtual machine NIC. --showdevall Show a relationship table for all network devices. --showdevuse Show a relational table of all network devices in use. --showdhcp Show all DHCP clients. --showsnap name Show snapshots list of the virtual machine. --showsnapall Show snapshots list of the all virtual machines. --showstats name Show the statistics of the virtual machine, including CPU/Memory usage, Disk I/O, Network traffic, and Service status. --snapshot name Generating snapshots for the virtual machine. --start name Start a virtual machine. --stop name Shut down a virtual machine. --unlock name Unlock a virtual machine. --unlockall Unlock all virtual machines. --unsetsw switch Delete the IP address of the virtual switch. --version Show the version number of bvm installed. --vminfo name Shows the configuration of the virtual machine. CONFIGURE FILES /usr/local/etc/bvm/bvm.conf This file records the virtual machine's directory and a list of all supported operating systems. /usr/local/etc/bvm/nat.conf This file records the configuration information for all NAT. nat0=172.16.1.1/24 nat1=10.10.30.1/24 nat2=192.168.1.1/24 /usr/local/etc/bvm/switch.conf This file records the configuration information of all virtual switches. The default 0-2 sets the IP address, and 3-7 is not set. switch0=10.0.1.0/24 switch1=10.0.2.0/24 switch2=10.0.3.0/24 switch3= switch4= switch5= switch6= switch7= /usr/local/etc/bvm/dhcp.conf This file records DHCP configuration information, including lease time, DNS, IP address pool, etc. SEE ALSO tmux(1), bridge(4), tap(4), bhyve(8), bhyveload(8), zfs(8) BUGS Please report all bugs/issues/feature requests to the GitHub project at https://github.com/bigdragonsoft/bvm AUTHORS Qiang Guo <bigdragonsoft@gmail.com> FreeBSD ports 15.quarterly December 28, 2025 BVM(8)
NAME | SYNOPSIS | DESCRIPTION | BASIC SETUP | OPTIONS | CONFIGURE FILES | SEE ALSO | BUGS | AUTHORS
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