使用virsh执行qemu-monitor命令

virsh 可以发送命令给qemu-monitor

virsh # help  qemu-monitor-command host
  NAME
    qemu-monitor-command - QEMU Monitor Command

  SYNOPSIS
    qemu-monitor-command <domain> [--hmp] [--pretty] {[--cmd] <string>}...

  DESCRIPTION
    QEMU Monitor Command

  OPTIONS
    [--domain] <string>  domain name, id or uuid
    --hmp            command is in human monitor protocol
    --pretty         pretty-print any qemu monitor protocol output
    [--cmd] <string>  command