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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 (
"fmt"
"log"
"github.com/digitalocean/go-qemu/hypervisor"
"github.com/digitalocean/go-qemu/qemu"
)
// get the list of domains from libvirt
func pollHypervisor(hv *hypervisor.Hypervisor) string {
var out string
// 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)
out += "ON " + name + "\n"
} else {
fmt.Println("OFF", status, name, drives)
out += "OFF " + name + "\n"
}
// Close the domain to clean up its resources and underlying monitor.
// todo: store dom and reuse it? not closing it hangs libvirt eventually because it leaves dangling
// connects that rack up and all block in virNetSocketReadWire:1781
// probably this doesn't matter because NOTHING HERE IS DONE IN HIGH FREQUENCY EVER.
// domU changes hardly ever happen
if err := dom.Close(); err != nil {
log.Fatalf("failed to close domain: %v", err)
}
}
return out
}
/*
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)
}
}
*/
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