Hi Robert, On 23.05.23 15:51, Robert Nestor wrote:
Commenting on your follow-up on Xen startup and how I considered doing this in NVMM. I have a rudamentory script that I use to define/create guest systems which also includes some hooks for starting up guest systems. There’s not currently any way I found in NVMM to send in shutdown commands or instructions though which seem to be available in Xen and KVM. I did put hooks in my script to backup and restore guest systems.
Assuming you are using Qemu as the frontend to nvmm you can redirect Qemus "monitor" console to a Unix domain socket.
I use this command in my scripts: ``` MONITOR_SOCKET=/tmp/$VM_ID.monitor CONSOLE_SOCKET=/tmp/$VM_ID.consolenohup qemu-system-x86_64 -name $VM_ID -machine pc-q35-7.0 -smp $VM_CORES -m $VM_RAM -accel nvmm \
-device virtio-balloon-pci,id=balloon0 \
-k de -boot cd -cdrom $VM_CDROM \
-machine graphics=off -display none -vga none \
-object
rng-random,filename=/dev/urandom,id=viornd0 \
-device virtio-rng-pci,rng=viornd0 \
-object iothread,id=t0 \
$BLK \
-device virtio-net-pci,netdev=vioif0,mac=$VM_MAC \
-netdev
tap,id=vioif0,ifname=$VM_NETIF,script=no,downscript=no \
-chardev
socket,id=monitor,path=$MONITOR_SOCKET,server=on,wait=off \
-monitor chardev:monitor \
-chardev
socket,id=serial0,path=$CONSOLE_SOCKET,server=on,wait=off \
-serial chardev:serial0 \
-pidfile /tmp/$VM_ID.pid \
2>&1 | logger -p local0.notice &
```
Shutdown is possible by sendung the system_powerdown qemu monitor command:
```
MONITOR_SOCKET=/tmp/$VM_ID.monitor
echo "system_powerdown" | nc -N -U $MONITOR_SOCKET
echo ""
```
On my systems this result in an ACPI poweroff event which triggers the
shutdown procedure in the NetBSD guest.
Kind regards Matthias
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