func readLibvirtVM(HostIpAddress string, UUIDString string) (VirtualMachine, error) {
var conn libvirt.VirConnection
var err error
ok := ipaddressConnectionCache.Check(HostIpAddress)
if ok == false {
conn, err = libvirt.NewVirConnection("qemu+ssh://root@" + HostIpAddress + "/system")
if err != nil {
return VirtualMachine{}, err
}
ipaddressConnectionCache.Set(HostIpAddress, conn)
} else {
//?How to deal with connection's not alive
conn = ipaddressConnectionCache.Get(HostIpAddress).(libvirt.VirConnection)
if ok, _ := conn.IsAlive(); !ok {
log.Printf("remote %s is not alive", HostIpAddress)
conn, err = libvirt.NewVirConnection("qemu+ssh://root@" + HostIpAddress + "/system")
if err != nil {
ipaddressConnectionCache.Delete(HostIpAddress)
return VirtualMachine{}, err
}
/*TODO Write Lock*/
ipaddressConnectionCache.Set(HostIpAddress, conn)
}
}
domain, err := conn.LookupByUUIDString(UUIDString)
if err != nil {
return VirtualMachine{}, err
}
vm := fillVmData(domain, conn)
return vm, nil
}
func registerRebootAndGetVncPort(name string, ip string, conn libvirt.VirConnection) string {
var domain libvirt.VirDomain
domain, err := conn.LookupByName(name)
if err != nil {
log.Println("FAIL: find running domain to start vncviewer")
return ""
}
defer domain.Free()
xmlData, _ := domain.GetXMLDesc()
v := utils.ParseDomainXML(xmlData)
/* to get VNC port */
var vncPort string
if v.Devices.Graphics.VNCPort == "-1" {
log.Println("FAIL:Can not get vnc port")
return ""
}
vncPort = v.Devices.Graphics.VNCPort
ret := libvirt.ConnectDomainEventRegister(conn, domain, libvirt.VIR_DOMAIN_EVENT_ID_LIFECYCLE, libvirt.LifeCycleCallBackType(myrebootcallback))
if ret == -1 {
fmt.Println("can not autoreboot")
} else {
callbackMap.Set(name, ret)
}
vncAddress := ip + ":" + vncPort
//e.g. http://147.2.207.233/vnc_auto.html?title=lwang-n1-sle12rc1&path=websockify?ip=147.2.207.233:5902
log.Println(fmt.Sprintf("/vnc_auto.html?title=%s&path=websockify?ip=%s", name, vncAddress))
return fmt.Sprintf("/vnc_auto.html?title=%s&path=websockify?ip=%s", name, vncAddress)
}
func startVNCviewer(conn libvirt.VirConnection, name string, hostIPAddress string) {
fmt.Println("would bring up vncviewer...")
var domain libvirt.VirDomain
domain, err := conn.LookupByName(name)
if err != nil {
fmt.Println("FAIL: find running domain to start vncviewer")
return
}
defer domain.Free()
xmlData, _ := domain.GetXMLDesc()
v := utils.ParseDomainXML(xmlData)
/* to get VNC port */
var vncPort string
if v.Devices.Graphics.VNCPort == "-1" {
fmt.Println("FAIL:Can not get vnc port")
return
}
vncPort = v.Devices.Graphics.VNCPort
ret := libvirt.ConnectDomainEventRegister(conn, domain, libvirt.VIR_DOMAIN_EVENT_ID_LIFECYCLE, libvirt.LifeCycleCallBackType(myrebootcallback))
if ret == -1 {
fmt.Println("can not autoreboot")
return
}
fmt.Println("RUNNING: vncviewer " + hostIPAddress + ":" + vncPort)
cmd := exec.Command("vncviewer", hostIPAddress+":"+vncPort)
//Run will block
err = cmd.Run()
if err != nil {
fmt.Println("FAIL:can not start vncviewer")
fmt.Println(err)
return
}
fmt.Println("vncviewer is quiting")
time.Sleep(3 * time.Second)
//re run vncviewer
cmd.Run()
}
func createRemoteBootPool(conn libvirt.VirConnection) (libvirt.VirStoragePool, error) {
// Test volume pool
// create vol from pool and Upload
var pool libvirt.VirStoragePool
pool, err := conn.StoragePoolLookupByName("boot-scratch")
if err != nil {
// pool not existed
// create on pool named "boot-scrath"
// TODO
log.Println("pool not exist")
//poolXML, _:= ioutil.ReadFile("./pool.xml")
poolXML := POOXML
pool, err = conn.StoragePoolDefineXML(string(poolXML))
if err != nil {
return libvirt.VirStoragePool{}, err
}
}
return pool, nil
}
func VmInstall(conn libvirt.VirConnection, vmname string, url string, autoyast string, imageSize uint64, ch chan string) {
//check input
if len(vmname) <= 0 {
reportFail(ch, "Name too short")
return
}
if imageSize == 0 {
reportFail(ch, "disk size too short")
}
//sender close the channel
if ch != nil {
defer close(ch)
}
pool, err := createRemoteBootPool(conn)
defer pool.Free()
//url := "http://mirror.bej.suse.com/dist/install/SLP/SLE-12-Server-Beta10/x86_64/DVD1"
linuxSurfix := "/boot/x86_64/loader/linux"
initrdSurfix := "/boot/x86_64/loader/initrd"
// Download linux and initrd image from remote
reportStatus(ch, "Downloading linux image")
m := DownloadManager{}
m.Regsiter(HTTPDownloader{})
linuxContent, err := m.Download(url + linuxSurfix)
if err != nil {
reportFail(ch, err.Error())
return
}
reportStatus(ch, "Downloading initrd image")
initrdContent, err := m.Download(url + initrdSurfix)
if err != nil {
reportFail(ch, err.Error())
return
}
//prepare two temporary name for linux;initrd image
temp := generateFourRandom()
bootImageName := vmname + temp + ".image"
bootInitrdName := vmname + temp + ".initrd"
// create remote boot linux storage from temp pool
linuxVolume, err := createVolume(pool, Storage{Name: bootImageName, Size: uint64(len(linuxContent)), Type: "raw"})
if err != nil {
reportFail(ch, err.Error())
return
}
defer linuxVolume.Free()
defer linuxVolume.Delete()
linuxPath, _ := linuxVolume.GetPath()
// create remote boot initrd storage from temp pool
initrdVolume, err := createVolume(pool, Storage{Name: bootInitrdName, Size: uint64(len(initrdContent)), Type: "raw"})
if err != nil {
reportFail(ch, err.Error())
return
}
defer initrdVolume.Free()
defer initrdVolume.Delete()
initrdPath, _ := initrdVolume.GetPath()
var stream libvirt.VirStream
stream, err = conn.StreamNew()
if err != nil {
reportFail(ch, err.Error())
return
}
defer stream.Free()
//Upload to remote
reportStatus(ch, "sending linuxVolume")
if err := SendLocalToRemote(stream, linuxVolume, linuxContent); err != nil {
reportFail(ch, err.Error())
return
}
reportStatus(ch, "sending initrd")
if err := SendLocalToRemote(stream, initrdVolume, initrdContent); err != nil {
reportFail(ch, err.Error())
return
}
// create image
reportStatus(ch, "creating remote imaging...")
dataPool, err := conn.StoragePoolLookupByName("default")
if err != nil {
reportFail(ch, err.Error())
return
}
defer dataPool.Free()
//var imageSize uint64 = 8589934592 //8G
realImageName := vmname + ".img"
imageVolume, err := createVolume(dataPool, Storage{Name: realImageName, Size: imageSize, Type: "qcow2"})
if err != nil {
reportFail(ch, err.Error())
return
}
defer imageVolume.Free()
imagePath, _ := imageVolume.GetPath()
log.Println("Create remote VirtualMachine")
reportStatus(ch, "Create remote VirtualMachine")
// create boot xml
var xml string
// add autoyast
var installArg string
if len(autoyast) > 0 {
installArg = url + " autoyast=" + autoyast
} else {
installArg = url
}
domain := Domain{Name: vmname, Kernel: linuxPath, Initrd: initrdPath, Image: imagePath, Install: installArg}
if xml, err = domain.Encode(); err != nil {
reportFail(ch, err.Error())
return
}
// create booting vm
bootingDomain, err := conn.CreateXML(xml)
if err != nil {
reportFail(ch, err.Error())
return
}
defer bootingDomain.Free()
// get xml from remote
// create new defined xml
if xml, err = bootingDomain.GetXMLDesc(); err != nil {
reportFail(ch, err.Error())
return
}
/* change xml a bit using regex lines, I do not want to parse the xml file
* 1. change os section to boot from hd
* 2. change destory section
*/
/* (?s) is used to let . match newline(\n) */
osSection := regexp.MustCompile("(?s)<os>.*</os>")
onBoot := regexp.MustCompile("(?s)<on_reboot>.*</on_reboot>")
onCrash := regexp.MustCompile("(?s)<on_crash>.*</on_crash>")
xml = osSection.ReplaceAllString(xml, OSSECTION)
xml = onBoot.ReplaceAllString(xml, ONBOOT)
xml = onCrash.ReplaceAllString(xml, ONCRASH)
newPersistentDomain, err := conn.DefineXML(xml)
if err != nil {
reportFail(ch, err.Error())
return
}
log.Println(newPersistentDomain)
defer newPersistentDomain.Free()
reportSuccess(ch)
}
func readLibvirtPysicalMachine(hosts []*PhysicalMachine) {
/* get libvirt connections */
numLiveHost := 0
var conn libvirt.VirConnection
/* use this type in chanStruct */
type connResult struct {
host *PhysicalMachine
conn libvirt.VirConnection
existing bool
}
connChan := make(chan connResult)
var numGoroutines = 0
for _, host := range hosts {
ok := ipaddressConnectionCache.Check(host.IpAddress)
if ok == false {
numGoroutines++
go func(host *PhysicalMachine) {
conn, err := libvirt.NewVirConnection("qemu+ssh://root@" + host.IpAddress + "/system")
if err != nil {
checkErr(err, fmt.Sprintf("failed to connect to %s", host.IpAddress))
host.Existing = false
connChan <- connResult{host: host, existing: false}
return
}
connChan <- connResult{host: host, conn: conn, existing: true}
}(host)
} else {
/* existing a conn which is alive */
conn = ipaddressConnectionCache.Get(host.IpAddress).(libvirt.VirConnection)
if ok, _ := conn.IsAlive(); ok {
host.VirConn = conn
host.Existing = true
numLiveHost++
/* existing a conn which is dead */
} else {
log.Printf("remove %s is not alive", host.IpAddress)
host.Existing = false
ipaddressConnectionCache.Delete(host.IpAddress)
/* TODO ?if close the connectin */
conn.CloseConnection()
}
}
}
for i := 0; i < numGoroutines; i++ {
r := <-connChan
if r.existing {
r.host.VirConn = r.conn
r.host.Existing = true
/*Write Lock*/
ipaddressConnectionCache.Set(r.host.IpAddress, r.conn)
numLiveHost++
}
}
/* all the PhysicalMachines are ready, VirConnection was connected now */
/* receive data from VirConnections */
done := make(chan bool)
for _, host := range hosts {
if host.Existing == false {
continue
}
go func(host *PhysicalMachine) {
domains, _ := host.VirConn.ListAllDomains()
for _, virdomain := range domains {
vm := fillVmData(virdomain, conn)
vm.HostIpAddress = host.IpAddress
if vm.Active == true {
vm.VNCAddress = host.IpAddress
}
//will not have any operations on vm, virdomain could be freeed
virdomain.Free()
host.VirtualMachines = append(host.VirtualMachines, &vm)
}
done <- true
}(host)
}
/* wait for all ListAllDomains finish */
for i := 0; i < numLiveHost; i++ {
<-done
}
}
