Monior | fortigate_exporter + grafana + promethus with docker

Install fortigate_exporter + grafana + promethus with docker on Ubuntu 20 step by step.

PVE | 分配第二張GPU時無法啟動VM，failed to open /dev/vfio/1: Device or resource busy

 最近安裝虛擬機器時遇到這樣的問題，實體機器有兩張GPU，新增兩台VM，各配置一張GPU，開啟VM只能開啟一台，錯誤訊息如下

kvm: -device vfio-pci,host=0000:02:00.0,id=hostpci0.0,bus=ich9-pcie-port-1,addr=0x0.0,x-vga=on,multifunction=on: vfio 0000:02:00.0: failed to open /dev/vfio/1: Device or resource busy
TASK ERROR: start failed: QEMU exited with code 1