start somewhere

.gitignore

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+*.swp
+go.mod
+go.sum
+
+virtigo
+virtigod

Makefile

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+all:
+	make redomod
+	go build
+	sudo ./virtigod
+
+goimports:
+	goimports -w *.go
+
+redomod:
+	rm -f go.*
+	GO111MODULE= go mod init
+	GO111MODULE= go mod tidy
+
+clean:
+	rm -f go.*
+	rm -f virtigo*

README

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+This is the virtigo daemon. Run this on the hypervisors.
+
+The name is wierd, but that's just how it worked out.  Perhaps it's 
+appropriate because domU information should be accurate from dom0 here.
+Nonetheless, this should be called "virtigo D" not "virti-god".

main.go

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+// Copyright 2016 The go-qemu Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"time"
+
+	hypervisor "github.com/digitalocean/go-qemu/hypervisor"
+	"github.com/digitalocean/go-qemu/qemu"
+)
+
+var (
+	network = flag.String("network", "unix", `Named network used to connect on. For Unix sockets -network=unix, for TCP connections: -network=tcp`)
+	address = flag.String("address", "/var/run/libvirt/libvirt-sock", `Address of the hypervisor. This could be in the form of Unix or TCP sockets. For TCP connections: -address="host:16509"`)
+	timeout = flag.Duration("timeout", 2*time.Second, "Connection timeout. Another valid value could be -timeout=500ms")
+)
+
+func main() {
+	flag.Parse()
+
+	// fmt.Printf("\nConnecting to %s://%s\n", *network, *address)
+	newConn := func() (net.Conn, error) {
+		// return net.DialTimeout(*network, *address, *timeout)
+		return net.DialTimeout("unix", "/var/run/libvirt/libvirt-sock", *timeout)
+		// return net.DialTimeout("tcp", "farm02:16514", *timeout)
+	}
+
+	driver := hypervisor.NewRPCDriver(newConn)
+	hv := hypervisor.New(driver)
+
+	// fmt.Printf("\n**********Domains**********\n")
+	domains, err := hv.Domains()
+	if err != nil {
+		log.Fatalf("Unable to get domains from hypervisor: %v", err)
+	}
+	for _, dom := range domains {
+		var name string
+		var err error
+		var drives []string
+		var status qemu.Status
+		name = dom.Name
+		// fmt.Printf("%s\n", dom.Name)
+		status, err = dom.Status()
+		if err != nil {
+			fmt.Println(name, status, err)
+			continue
+		}
+		// fmt.Printf("\nStatus: %s\n", status)
+		/*
+		if status == qemu.StatusRunning {
+			// getBlockDevices(dom)
+			// fmt.Println(name, status, err)
+		}
+		*/
+		blockDevices, err := dom.BlockDevices()
+		for _, blockDevice := range blockDevices {
+			drives = append(drives, blockDevice.Device)
+			drives = append(drives, blockDevice.Inserted.Driver)
+			drives = append(drives, blockDevice.Inserted.File)
+			// fmt.Printf("%20s %8s %30s\n",
+			// 	blockDevice.Device, blockDevice.Inserted.Driver, blockDevice.Inserted.File)
+		}
+		if status == qemu.StatusRunning {
+			fmt.Println("ON ", name, drives)
+		} else {
+			fmt.Println("OFF", status, name, drives)
+		}
+	}
+	// fmt.Printf("\n***************************\n")
+}
+
+func displayBlockDevices(domain *qemu.Domain) {
+	// var []blks string
+	blockDevices, err := domain.BlockDevices()
+	if err != nil {
+		log.Fatalf("Error getting blockDevices: %v\n", blockDevices)
+	}
+	fmt.Printf("\n[ BlockDevices ]\n")
+	fmt.Printf("========================================================================\n")
+	fmt.Printf("%20s %8s %30s\n", "Device", "Driver", "File")
+	fmt.Printf("========================================================================\n")
+	for _, blockDevice := range blockDevices {
+		fmt.Printf("%20s %8s %30s\n",
+			blockDevice.Device, blockDevice.Inserted.Driver, blockDevice.Inserted.File)
+	}
+}
+
+func displayPCIDevices(domain *qemu.Domain) {
+	pciDevices, err := domain.PCIDevices()
+	if err != nil {
+		log.Fatalf("Error getting PCIDevices: %v\n", pciDevices)
+	}
+	fmt.Printf("\n[ PCIDevices ]\n")
+	fmt.Printf("======================================\n")
+	fmt.Printf("%10s %20s\n", "[ID]", "[Description]")
+	fmt.Printf("======================================\n")
+	for _, pciDevice := range pciDevices {
+		fmt.Printf("[%10s] [%20s]\n", pciDevice.QdevID, pciDevice.ClassInfo.Desc)
+	}
+}
+