bhyve-vm-goagent

It is an agent developed using Go that runs inside guest virtual machines and allows host hypervisor to obtain information from guest such like memory usage, cpu, disk and ethernet configuration.

It supports virtio-console as well as WebSocket protocol.

Build instructions

1. make deps
2. make

It will try to detect your OS and build the binaries for it.

Build release

1. make deps
2. make deps_windows
3. make release

It will cross compile binaries for the following platforms: FreeBSD, NetBSD, Linux and Windows.

NOTE: When it runs make deps_windows a 'build constraints' will appears, just ignore it.

Usage instructions (Host VM)

Start bhyve(8).

Usage of -virtio:bhyve -A -H -w -c 2 -m 2048 -s 0:0,hostbridge \
-s 31,lpc -l com1,/dev/nmdm132A -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd \
-s 3,e1000,tap0,mac=00:a0:98:1e:c0:08 -s 9,fbuf,vncserver,tcp=192.168.100.111:6032,w=800,h=600,, \
-s 30,xhci,tablet -s 4,ahci-hd,/dev/zvol/tank/freebsd12 \
-s 2,virtio-console,org.freenas.bhyve-agent=/tmp/FreeBSD12.sock FreeBSD12

Note for the parameter -s 2,virtio-console,org.freenas.bhyve-agent=/tmp/FreeBSD12.sock

Usage instructions (Guest VM)

root@guest:/tmp # ./bhyve-vm-goagent-freebsd-386

Usage of -virtio:
  -virtio
	It uses the virtio-console for communication.

Usage of -websocket:
  -websocket
	It uses the websocket for communication.
  -ipaddr string
	IPv4/IPv6 to bind the service. (default "127.0.0.1")
  -port int
	TCP port to bind the websocket. (default 8080)

Start in websocket mode

root@guest:/tmp # ./bhyve-vm-goagent-freebsd-386 -websocket -ipaddr="192.168.100.193" -port=9191
018/01/22 11:30:12 ==> Running server at: 192.168.100.193:9191

Start in virtio mode

root@guest:/tmp # ./bhyve-vm-goagent-freebsd-386 -virtio
2018/01/22 11:41:50 ==> /dev/vtcon/org.freenas.bhyve-agent

How to use host tools?

Build goserial:

make tools

goserial.go:

root@freenas:/tmp # ./goserial -socket="/tmp/FreeBSD12.sock" -ether -uptime
Result:  [{"mtu":1500,"name":"em0","hardwareaddr":"00:a0:98:1e:c0:08","flags":["up","broadcast","multicast"],"addrs":[{"addr":"192.168.100.193/24"}]} {"mtu":16384,"name":"lo0","hardwareaddr":"","flags":["up","loopback","multicast"],"addrs":[{"addr":"::1/128"},{"addr":"fe80::1/64"},{"addr":"127.0.0.1/8"}]}]
Result:  {"seconds":5742,"days":0,"hours":1,"minutes":35}

client.py:

[araujo@pipoca] /z/go/bhyve-vm-goagent/tools/host# python3 client.py

You need to edit client.py and change GUEST_IP and GUEST_PORT according with your guest vm settings.

Copyright and licensing

Distributed under 2-Clause BSD License.