/
vm.go
3232 lines (3128 loc) · 88.8 KB
/
vm.go
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package manager
import (
"bytes"
"crypto/rand"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"os"
"os/exec"
"path/filepath"
"syscall"
"time"
domlib "github.com/Cloud-Foundations/Dominator/dom/lib"
hyperclient "github.com/Cloud-Foundations/Dominator/hypervisor/client"
imclient "github.com/Cloud-Foundations/Dominator/imageserver/client"
"github.com/Cloud-Foundations/Dominator/lib/errors"
"github.com/Cloud-Foundations/Dominator/lib/filesystem"
"github.com/Cloud-Foundations/Dominator/lib/filesystem/scanner"
"github.com/Cloud-Foundations/Dominator/lib/filesystem/util"
"github.com/Cloud-Foundations/Dominator/lib/filter"
"github.com/Cloud-Foundations/Dominator/lib/format"
"github.com/Cloud-Foundations/Dominator/lib/fsutil"
"github.com/Cloud-Foundations/Dominator/lib/hash"
"github.com/Cloud-Foundations/Dominator/lib/image"
"github.com/Cloud-Foundations/Dominator/lib/json"
"github.com/Cloud-Foundations/Dominator/lib/log"
"github.com/Cloud-Foundations/Dominator/lib/log/prefixlogger"
"github.com/Cloud-Foundations/Dominator/lib/mbr"
libnet "github.com/Cloud-Foundations/Dominator/lib/net"
"github.com/Cloud-Foundations/Dominator/lib/objectcache"
"github.com/Cloud-Foundations/Dominator/lib/objectserver"
objclient "github.com/Cloud-Foundations/Dominator/lib/objectserver/client"
"github.com/Cloud-Foundations/Dominator/lib/rsync"
"github.com/Cloud-Foundations/Dominator/lib/srpc"
"github.com/Cloud-Foundations/Dominator/lib/tags"
"github.com/Cloud-Foundations/Dominator/lib/verstr"
"github.com/Cloud-Foundations/Dominator/lib/wsyscall"
proto "github.com/Cloud-Foundations/Dominator/proto/hypervisor"
subproto "github.com/Cloud-Foundations/Dominator/proto/sub"
sublib "github.com/Cloud-Foundations/Dominator/sub/lib"
)
const (
bootlogFilename = "bootlog"
serialSockFilename = "serial0.sock"
)
var (
errorNoAccessToResource = errors.New("no access to resource")
)
func computeSize(minimumFreeBytes, roundupPower, size uint64) uint64 {
minBytes := size + size>>3 // 12% extra for good luck.
minBytes += minimumFreeBytes
if roundupPower < 24 {
roundupPower = 24 // 16 MiB.
}
imageUnits := minBytes >> roundupPower
if imageUnits<<roundupPower < minBytes {
imageUnits++
}
return imageUnits << roundupPower
}
func copyData(filename string, reader io.Reader, length uint64) error {
file, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY,
fsutil.PrivateFilePerms)
if err != nil {
return err
}
defer file.Close()
if err := setVolumeSize(filename, length); err != nil {
return err
}
if reader == nil {
return nil
}
_, err = io.CopyN(file, reader, int64(length))
return err
}
func createTapDevice(bridge string) (*os.File, error) {
tapFile, tapName, err := libnet.CreateTapDevice()
if err != nil {
return nil, fmt.Errorf("error creating tap device: %s", err)
}
doAutoClose := true
defer func() {
if doAutoClose {
tapFile.Close()
}
}()
cmd := exec.Command("ip", "link", "set", tapName, "up")
if output, err := cmd.CombinedOutput(); err != nil {
return nil, fmt.Errorf("error upping: %s: %s", err, output)
}
cmd = exec.Command("ip", "link", "set", tapName, "master", bridge)
if output, err := cmd.CombinedOutput(); err != nil {
return nil, fmt.Errorf("error attaching: %s: %s", err, output)
}
doAutoClose = false
return tapFile, nil
}
func deleteFilesNotInImage(imgFS, vmFS *filesystem.FileSystem,
rootDir string, logger log.DebugLogger) error {
var totalBytes uint64
imgHashToInodesTable := imgFS.HashToInodesTable()
imgComputedFiles := make(map[string]struct{})
imgFS.ForEachFile(func(name string, inodeNumber uint64,
inode filesystem.GenericInode) error {
if _, ok := inode.(*filesystem.ComputedRegularInode); ok {
imgComputedFiles[name] = struct{}{}
}
return nil
})
for filename, inum := range vmFS.FilenameToInodeTable() {
if inode, ok := vmFS.InodeTable[inum].(*filesystem.RegularInode); ok {
if inode.Size < 1 {
continue
}
if _, isComputed := imgComputedFiles[filename]; isComputed {
continue
}
if _, inImage := imgHashToInodesTable[inode.Hash]; inImage {
continue
}
pathname := filepath.Join(rootDir, filename)
if err := os.Remove(pathname); err != nil {
return err
}
logger.Debugf(1, "pre-delete: %s\n", pathname)
totalBytes += inode.Size
}
}
logger.Debugf(0, "pre-delete: totalBytes: %s\n",
format.FormatBytes(totalBytes))
return nil
}
func extractKernel(volume proto.LocalVolume, extension string,
objectsGetter objectserver.ObjectsGetter, fs *filesystem.FileSystem,
bootInfo *util.BootInfoType) error {
dirent := bootInfo.KernelImageDirent
if dirent == nil {
return errors.New("no kernel image found")
}
inode, ok := dirent.Inode().(*filesystem.RegularInode)
if !ok {
return errors.New("kernel image is not a regular file")
}
inode.Size = 0
filename := filepath.Join(volume.DirectoryToCleanup, "kernel"+extension)
_, err := objectserver.LinkObject(filename, objectsGetter, inode.Hash)
if err != nil {
return err
}
dirent = bootInfo.InitrdImageDirent
if dirent != nil {
inode, ok := dirent.Inode().(*filesystem.RegularInode)
if !ok {
return errors.New("initrd image is not a regular file")
}
inode.Size = 0
filename := filepath.Join(volume.DirectoryToCleanup,
"initrd"+extension)
_, err = objectserver.LinkObject(filename, objectsGetter,
inode.Hash)
if err != nil {
return err
}
}
return nil
}
func maybeDrainAll(conn *srpc.Conn, request proto.CreateVmRequest) error {
if err := maybeDrainImage(conn, request.ImageDataSize); err != nil {
return err
}
if err := maybeDrainUserData(conn, request); err != nil {
return err
}
return nil
}
func maybeDrainImage(imageReader io.Reader, imageDataSize uint64) error {
if imageDataSize > 0 { // Drain data.
_, err := io.CopyN(ioutil.Discard, imageReader, int64(imageDataSize))
return err
}
return nil
}
func maybeDrainUserData(conn *srpc.Conn, request proto.CreateVmRequest) error {
if request.UserDataSize > 0 { // Drain data.
_, err := io.CopyN(ioutil.Discard, conn, int64(request.UserDataSize))
return err
}
return nil
}
func readData(firstByte byte, moreBytes <-chan byte) []byte {
buffer := make([]byte, 1, len(moreBytes)+1)
buffer[0] = firstByte
for {
select {
case char, ok := <-moreBytes:
if !ok {
return buffer
}
buffer = append(buffer, char)
default:
return buffer
}
}
}
func readOne(objectsDir string, hashVal hash.Hash, length uint64,
reader io.Reader) error {
filename := filepath.Join(objectsDir, objectcache.HashToFilename(hashVal))
dirname := filepath.Dir(filename)
if err := os.MkdirAll(dirname, dirPerms); err != nil {
return err
}
return fsutil.CopyToFile(filename, fsutil.PrivateFilePerms, reader, length)
}
func setVolumeSize(filename string, size uint64) error {
if err := os.Truncate(filename, int64(size)); err != nil {
return err
}
return fsutil.Fallocate(filename, size)
}
func (m *Manager) acknowledgeVm(ipAddr net.IP,
authInfo *srpc.AuthInformation) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
vm.destroyTimer.Stop()
return nil
}
func (m *Manager) addVmVolumes(ipAddr net.IP, authInfo *srpc.AuthInformation,
volumeSizes []uint64) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if vm.State != proto.StateStopped {
return errors.New("VM is not stopped")
}
volumes := make([]proto.Volume, 0, len(volumeSizes))
for _, size := range volumeSizes {
volumes = append(volumes, proto.Volume{Size: size})
}
volumeDirectories, err := vm.manager.getVolumeDirectories(0, volumes,
vm.SpreadVolumes)
if err != nil {
return err
}
volumeLocations := make([]proto.LocalVolume, 0, len(volumes))
defer func() {
for _, volumeLocation := range volumeLocations {
os.Remove(volumeLocation.Filename)
os.Remove(volumeLocation.DirectoryToCleanup)
}
}()
for index, volumeDirectory := range volumeDirectories {
dirname := filepath.Join(volumeDirectory, vm.ipAddress)
filename := filepath.Join(dirname,
fmt.Sprintf("secondary-volume.%d", len(vm.Volumes)-1+index))
volumeLocation := proto.LocalVolume{
DirectoryToCleanup: dirname,
Filename: filename,
}
if err := os.MkdirAll(dirname, dirPerms); err != nil {
return err
}
cFlags := os.O_CREATE | os.O_EXCL | os.O_RDWR
file, err := os.OpenFile(filename, cFlags, privateFilePerms)
if err != nil {
return err
} else {
file.Close()
}
if err := setVolumeSize(filename, volumeSizes[index]); err != nil {
return err
}
volumeLocations = append(volumeLocations, volumeLocation)
}
vm.VolumeLocations = append(vm.VolumeLocations, volumeLocations...)
volumeLocations = nil // Prevent cleanup. Thunderbirds are Go!
vm.Volumes = append(vm.Volumes, volumes...)
vm.writeAndSendInfo()
return nil
}
func (m *Manager) allocateVm(req proto.CreateVmRequest,
authInfo *srpc.AuthInformation) (*vmInfoType, error) {
if err := req.ConsoleType.CheckValid(); err != nil {
return nil, err
}
if req.MemoryInMiB < 1 {
return nil, errors.New("no memory specified")
}
if req.MilliCPUs < 1 {
return nil, errors.New("no CPUs specified")
}
subnetIDs := map[string]struct{}{req.SubnetId: {}}
for _, subnetId := range req.SecondarySubnetIDs {
if subnetId == "" {
return nil,
errors.New("cannot give unspecified secondary subnet ID")
}
if _, ok := subnetIDs[subnetId]; ok {
return nil,
fmt.Errorf("subnet: %s specified multiple times", subnetId)
}
subnetIDs[subnetId] = struct{}{}
}
address, subnetId, err := m.getFreeAddress(req.Address.IpAddress,
req.SubnetId, authInfo)
if err != nil {
return nil, err
}
addressesToFree := []proto.Address{address}
defer func() {
for _, address := range addressesToFree {
err := m.releaseAddressInPool(address)
if err != nil {
m.Logger.Println(err)
}
}
}()
var secondaryAddresses []proto.Address
for index, subnetId := range req.SecondarySubnetIDs {
var reqIpAddr net.IP
if index < len(req.SecondaryAddresses) {
reqIpAddr = req.SecondaryAddresses[index].IpAddress
}
secondaryAddress, _, err := m.getFreeAddress(reqIpAddr, subnetId,
authInfo)
if err != nil {
return nil, err
}
secondaryAddresses = append(secondaryAddresses, secondaryAddress)
addressesToFree = append(addressesToFree, secondaryAddress)
}
m.mutex.Lock()
defer m.mutex.Unlock()
if err := m.checkSufficientCPUWithLock(req.MilliCPUs); err != nil {
return nil, err
}
if err := m.checkSufficientMemoryWithLock(req.MemoryInMiB); err != nil {
return nil, err
}
var ipAddress string
if len(address.IpAddress) < 1 {
ipAddress = "0.0.0.0"
} else {
ipAddress = address.IpAddress.String()
}
vm := &vmInfoType{
LocalVmInfo: proto.LocalVmInfo{
VmInfo: proto.VmInfo{
Address: address,
ConsoleType: req.ConsoleType,
DestroyProtection: req.DestroyProtection,
DisableVirtIO: req.DisableVirtIO,
Hostname: req.Hostname,
ImageName: req.ImageName,
ImageURL: req.ImageURL,
MemoryInMiB: req.MemoryInMiB,
MilliCPUs: req.MilliCPUs,
OwnerGroups: req.OwnerGroups,
SpreadVolumes: req.SpreadVolumes,
SecondaryAddresses: secondaryAddresses,
SecondarySubnetIDs: req.SecondarySubnetIDs,
State: proto.StateStarting,
SubnetId: subnetId,
Tags: req.Tags,
},
},
manager: m,
dirname: filepath.Join(m.StateDir, "VMs", ipAddress),
ipAddress: ipAddress,
logger: prefixlogger.New(ipAddress+": ", m.Logger),
metadataChannels: make(map[chan<- string]struct{}),
}
m.vms[ipAddress] = vm
addressesToFree = nil
return vm, nil
}
func (m *Manager) becomePrimaryVmOwner(ipAddr net.IP,
authInfo *srpc.AuthInformation) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if vm.OwnerUsers[0] == authInfo.Username {
return errors.New("you already are the primary owner")
}
ownerUsers := make([]string, 1, len(vm.OwnerUsers[0]))
ownerUsers[0] = authInfo.Username
for _, user := range vm.OwnerUsers {
if user != authInfo.Username {
ownerUsers = append(ownerUsers, user)
}
}
vm.OwnerUsers = ownerUsers
vm.ownerUsers = make(map[string]struct{}, len(ownerUsers))
for _, user := range ownerUsers {
vm.ownerUsers[user] = struct{}{}
}
vm.writeAndSendInfo()
return nil
}
func (m *Manager) changeVmConsoleType(ipAddr net.IP,
authInfo *srpc.AuthInformation, consoleType proto.ConsoleType) error {
if err := consoleType.CheckValid(); err != nil {
return err
}
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if vm.State != proto.StateStopped {
return errors.New("VM is not stopped")
}
vm.ConsoleType = consoleType
vm.writeAndSendInfo()
return nil
}
func (m *Manager) changeVmDestroyProtection(ipAddr net.IP,
authInfo *srpc.AuthInformation, destroyProtection bool) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
vm.DestroyProtection = destroyProtection
vm.writeAndSendInfo()
return nil
}
func (m *Manager) changeVmOwnerUsers(ipAddr net.IP,
authInfo *srpc.AuthInformation, extraUsers []string) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
ownerUsers := make([]string, 1, len(extraUsers)+1)
ownerUsers[0] = vm.OwnerUsers[0]
for _, user := range extraUsers {
ownerUsers = append(ownerUsers, user)
}
vm.OwnerUsers = ownerUsers
vm.ownerUsers = make(map[string]struct{}, len(ownerUsers))
for _, user := range ownerUsers {
vm.ownerUsers[user] = struct{}{}
}
vm.writeAndSendInfo()
return nil
}
func (m *Manager) changeVmSize(ipAddr net.IP, authInfo *srpc.AuthInformation,
memoryInMiB uint64, milliCPUs uint) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if vm.State != proto.StateStopped {
return errors.New("VM is not stopped")
}
changed := false
if memoryInMiB > 0 {
if memoryInMiB < vm.MemoryInMiB {
vm.MemoryInMiB = memoryInMiB
changed = true
} else if memoryInMiB > vm.MemoryInMiB {
m.mutex.Lock()
err := m.checkSufficientMemoryWithLock(memoryInMiB - vm.MemoryInMiB)
if err == nil {
vm.MemoryInMiB = memoryInMiB
changed = true
}
m.mutex.Unlock()
if err != nil {
return err
}
}
}
if milliCPUs > 0 {
if milliCPUs < vm.MilliCPUs {
vm.MilliCPUs = milliCPUs
changed = true
} else if milliCPUs > vm.MilliCPUs {
m.mutex.Lock()
err := m.checkSufficientCPUWithLock(milliCPUs - vm.MilliCPUs)
if err == nil {
vm.MilliCPUs = milliCPUs
changed = true
}
m.mutex.Unlock()
if err != nil {
return err
}
}
}
if changed {
vm.writeAndSendInfo()
}
return nil
}
func (m *Manager) changeVmTags(ipAddr net.IP, authInfo *srpc.AuthInformation,
tgs tags.Tags) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
vm.Tags = tgs
vm.writeAndSendInfo()
return nil
}
func (m *Manager) checkVmHasHealthAgent(ipAddr net.IP) (bool, error) {
vm, err := m.getVmAndLock(ipAddr, false)
if err != nil {
return false, err
}
defer vm.mutex.RUnlock()
if vm.State != proto.StateRunning {
return false, nil
}
return vm.hasHealthAgent, nil
}
func (m *Manager) commitImportedVm(ipAddr net.IP,
authInfo *srpc.AuthInformation) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if !vm.Uncommitted {
return fmt.Errorf("%s is already committed", ipAddr)
}
if err := m.registerAddress(vm.Address); err != nil {
return err
}
vm.Uncommitted = false
vm.writeAndSendInfo()
return nil
}
func (m *Manager) connectToVmConsole(ipAddr net.IP,
authInfo *srpc.AuthInformation) (net.Conn, error) {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return nil, err
}
defer vm.mutex.Unlock()
if vm.State != proto.StateRunning {
return nil, errors.New("VM is not running")
}
if vm.ConsoleType != proto.ConsoleVNC {
return nil, errors.New("VNC console is not enabled")
}
console, err := net.Dial("unix", filepath.Join(vm.dirname, "vnc"))
if err != nil {
return nil, err
}
return console, nil
}
func (m *Manager) connectToVmSerialPort(ipAddr net.IP,
authInfo *srpc.AuthInformation,
portNumber uint) (chan<- byte, <-chan byte, error) {
if portNumber > 0 {
return nil, nil, errors.New("only one serial port is supported")
}
input := make(chan byte, 256)
output := make(chan byte, 16<<10)
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, nil)
if err != nil {
return nil, nil, err
}
defer vm.mutex.Unlock()
if vm.State != proto.StateRunning {
return nil, nil, errors.New("VM is not running")
}
serialInput := vm.serialInput
if serialInput == nil {
return nil, nil, errors.New("no serial input device for VM")
}
if vm.serialOutput != nil {
return nil, nil, errors.New("VM already has a serial port connection")
}
vm.serialOutput = output
go func(input <-chan byte, output chan<- byte) {
for char := range input {
buffer := readData(char, input)
if _, err := serialInput.Write(buffer); err != nil {
vm.logger.Printf("error writing to serial port: %s\n", err)
break
}
}
vm.logger.Debugln(0, "input channel for console closed")
vm.mutex.Lock()
if vm.serialOutput != nil {
close(vm.serialOutput)
vm.serialOutput = nil
}
vm.mutex.Unlock()
}(input, output)
return input, output, nil
}
func (m *Manager) copyVm(conn *srpc.Conn, request proto.CopyVmRequest) error {
m.Logger.Debugf(1, "CopyVm(%s) starting\n", conn.Username())
hypervisor, err := srpc.DialHTTP("tcp", request.SourceHypervisor, 0)
if err != nil {
return err
}
defer hypervisor.Close()
defer func() {
req := proto.DiscardVmAccessTokenRequest{
AccessToken: request.AccessToken,
IpAddress: request.IpAddress}
var reply proto.DiscardVmAccessTokenResponse
hypervisor.RequestReply("Hypervisor.DiscardVmAccessToken",
req, &reply)
}()
getInfoRequest := proto.GetVmInfoRequest{request.IpAddress}
var getInfoReply proto.GetVmInfoResponse
err = hypervisor.RequestReply("Hypervisor.GetVmInfo", getInfoRequest,
&getInfoReply)
if err != nil {
return err
}
switch getInfoReply.VmInfo.State {
case proto.StateStopped, proto.StateRunning:
default:
return errors.New("VM is not stopped or running")
}
accessToken := request.AccessToken
ownerUsers := make([]string, 1, len(request.OwnerUsers)+1)
ownerUsers[0] = conn.Username()
if ownerUsers[0] == "" {
return errors.New("no authentication data")
}
ownerUsers = append(ownerUsers, request.OwnerUsers...)
vmInfo := request.VmInfo
vmInfo.Address = proto.Address{}
vmInfo.SecondaryAddresses = nil
vmInfo.Uncommitted = false
vmInfo.Volumes = getInfoReply.VmInfo.Volumes
vm, err := m.allocateVm(proto.CreateVmRequest{VmInfo: vmInfo},
conn.GetAuthInformation())
if err != nil {
return err
}
vm.OwnerUsers = ownerUsers
vm.ownerUsers = make(map[string]struct{}, len(ownerUsers))
for _, username := range ownerUsers {
vm.ownerUsers[username] = struct{}{}
}
vm.Volumes = vmInfo.Volumes
if err := <-tryAllocateMemory(vmInfo.MemoryInMiB); err != nil {
return err
}
var secondaryVolumes []proto.Volume
for index, volume := range vmInfo.Volumes {
if index > 0 {
secondaryVolumes = append(secondaryVolumes, volume)
}
}
err = vm.setupVolumes(vmInfo.Volumes[0].Size, secondaryVolumes,
vmInfo.SpreadVolumes)
if err != nil {
return err
}
defer func() { // Evaluate vm at return time, not defer time.
if vm == nil {
return
}
vm.cleanup()
}()
vm.ownerUsers = make(map[string]struct{}, len(vm.OwnerUsers))
for _, username := range vm.OwnerUsers {
vm.ownerUsers[username] = struct{}{}
}
if err := os.MkdirAll(vm.dirname, dirPerms); err != nil {
return err
}
// Begin copying over the volumes.
err = sendVmCopyMessage(conn, "initial volume(s) copy")
if err != nil {
return err
}
err = vm.migrateVmVolumes(hypervisor, request.IpAddress, accessToken)
if err != nil {
return err
}
if getInfoReply.VmInfo.State != proto.StateStopped {
err = sendVmCopyMessage(conn, "stopping VM")
if err != nil {
return err
}
err := hyperclient.StopVm(hypervisor, request.IpAddress,
request.AccessToken)
if err != nil {
return err
}
defer hyperclient.StartVm(hypervisor, request.IpAddress, accessToken)
err = sendVmCopyMessage(conn, "update volume(s)")
if err != nil {
return err
}
err = vm.migrateVmVolumes(hypervisor, request.IpAddress, accessToken)
if err != nil {
return err
}
}
err = migratevmUserData(hypervisor,
filepath.Join(vm.dirname, "user-data.raw"),
request.IpAddress, accessToken)
if err != nil {
return err
}
vm.setState(proto.StateStopped)
vm.destroyTimer = time.AfterFunc(time.Second*15, vm.autoDestroy)
response := proto.CopyVmResponse{
Final: true,
IpAddress: vm.Address.IpAddress,
}
if err := conn.Encode(response); err != nil {
return err
}
vm = nil // Cancel cleanup.
m.Logger.Debugln(1, "CopyVm() finished")
return nil
}
func (m *Manager) createVm(conn *srpc.Conn) error {
sendError := func(conn *srpc.Conn, err error) error {
return conn.Encode(proto.CreateVmResponse{Error: err.Error()})
}
var ipAddressToSend net.IP
sendUpdate := func(conn *srpc.Conn, message string) error {
response := proto.CreateVmResponse{
IpAddress: ipAddressToSend,
ProgressMessage: message,
}
if err := conn.Encode(response); err != nil {
return err
}
return conn.Flush()
}
m.Logger.Debugf(1, "CreateVm(%s) starting\n", conn.Username())
var request proto.CreateVmRequest
if err := conn.Decode(&request); err != nil {
return err
}
ownerUsers := make([]string, 1, len(request.OwnerUsers)+1)
ownerUsers[0] = conn.Username()
if ownerUsers[0] == "" {
return sendError(conn, errors.New("no authentication data"))
}
ownerUsers = append(ownerUsers, request.OwnerUsers...)
vm, err := m.allocateVm(request, conn.GetAuthInformation())
if err != nil {
if err := maybeDrainAll(conn, request); err != nil {
return err
}
return sendError(conn, err)
}
defer func() {
vm.cleanup() // Evaluate vm at return time, not defer time.
}()
memoryError := tryAllocateMemory(request.MemoryInMiB)
vm.OwnerUsers = ownerUsers
vm.ownerUsers = make(map[string]struct{}, len(ownerUsers))
for _, username := range ownerUsers {
vm.ownerUsers[username] = struct{}{}
}
if err := os.MkdirAll(vm.dirname, dirPerms); err != nil {
if err := maybeDrainAll(conn, request); err != nil {
return err
}
return sendError(conn, err)
}
if request.ImageName != "" {
if err := maybeDrainImage(conn, request.ImageDataSize); err != nil {
return err
}
if err := sendUpdate(conn, "getting image"); err != nil {
return err
}
client, img, imageName, err := m.getImage(request.ImageName,
request.ImageTimeout)
if err != nil {
return sendError(conn, err)
}
defer client.Close()
fs := img.FileSystem
vm.ImageName = imageName
size := computeSize(request.MinimumFreeBytes, request.RoundupPower,
fs.EstimateUsage(0))
err = vm.setupVolumes(size, request.SecondaryVolumes,
request.SpreadVolumes)
if err != nil {
return sendError(conn, err)
}
err = sendUpdate(conn, "unpacking image: "+imageName)
if err != nil {
return err
}
writeRawOptions := util.WriteRawOptions{
InitialImageName: imageName,
MinimumFreeBytes: request.MinimumFreeBytes,
RootLabel: vm.rootLabel(),
RoundupPower: request.RoundupPower,
}
err = m.writeRaw(vm.VolumeLocations[0], "", client, fs, writeRawOptions,
request.SkipBootloader)
if err != nil {
return sendError(conn, err)
}
m.Logger.Debugln(1, "finished writing volume")
if fi, err := os.Stat(vm.VolumeLocations[0].Filename); err != nil {
return sendError(conn, err)
} else {
vm.Volumes = []proto.Volume{{Size: uint64(fi.Size())}}
}
} else if request.ImageDataSize > 0 {
err := vm.copyRootVolume(request, conn, request.ImageDataSize)
if err != nil {
return err
}
} else if request.ImageURL != "" {
if err := maybeDrainImage(conn, request.ImageDataSize); err != nil {
return err
}
httpResponse, err := http.Get(request.ImageURL)
if err != nil {
return sendError(conn, err)
}
defer httpResponse.Body.Close()
if httpResponse.StatusCode != http.StatusOK {
return sendError(conn, errors.New(httpResponse.Status))
}
if httpResponse.ContentLength < 0 {
return sendError(conn,
errors.New("ContentLength from: "+request.ImageURL))
}
err = vm.copyRootVolume(request, httpResponse.Body,
uint64(httpResponse.ContentLength))
if err != nil {
return sendError(conn, err)
}
} else if request.MinimumFreeBytes > 0 { // Create empty root volume.
err = vm.copyRootVolume(request, nil, request.MinimumFreeBytes)
if err != nil {
return sendError(conn, err)
}
} else {
return sendError(conn, errors.New("no image specified"))
}
if request.UserDataSize > 0 {
filename := filepath.Join(vm.dirname, "user-data.raw")
if err := copyData(filename, conn, request.UserDataSize); err != nil {
return sendError(conn, err)
}
}
if len(request.SecondaryVolumes) > 0 {
err := sendUpdate(conn, "creating secondary volumes")
if err != nil {
return err
}
for index, volume := range request.SecondaryVolumes {
fname := vm.VolumeLocations[index+1].Filename
var dataReader io.Reader
if request.SecondaryVolumesData {
dataReader = conn
}
if err := copyData(fname, dataReader, volume.Size); err != nil {
return sendError(conn, err)
}
vm.Volumes = append(vm.Volumes, volume)
}
}
if len(memoryError) < 1 {
msg := "waiting for test memory allocation"
sendUpdate(conn, msg)
vm.logger.Debugln(0, msg)
}
if err := <-memoryError; err != nil {
return sendError(conn, err)
}
if vm.ipAddress == "" {
ipAddressToSend = net.ParseIP(vm.ipAddress)
if err := sendUpdate(conn, "starting VM"); err != nil {
return err
}
} else {
ipAddressToSend = net.ParseIP(vm.ipAddress)
if err := sendUpdate(conn, "starting VM "+vm.ipAddress); err != nil {
return err
}
}
dhcpTimedOut, err := vm.startManaging(request.DhcpTimeout,
request.EnableNetboot, false)
if err != nil {
return sendError(conn, err)
}
vm.destroyTimer = time.AfterFunc(time.Second*15, vm.autoDestroy)
response := proto.CreateVmResponse{
DhcpTimedOut: dhcpTimedOut,
Final: true,
IpAddress: net.ParseIP(vm.ipAddress),
}
if err := conn.Encode(response); err != nil {
return err
}
vm = nil // Cancel cleanup.
m.Logger.Debugln(1, "CreateVm() finished")
return nil
}
func (m *Manager) deleteVmVolume(ipAddr net.IP, authInfo *srpc.AuthInformation,
accessToken []byte, volumeIndex uint) error {
if volumeIndex < 1 {
return errors.New("cannot delete root volume")
}
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, accessToken)
if err != nil {
return err
}
defer vm.mutex.Unlock()
if volumeIndex >= uint(len(vm.VolumeLocations)) {
return errors.New("volume index too large")
}
if vm.State != proto.StateStopped {
return errors.New("VM is not stopped")
}
if err := os.Remove(vm.VolumeLocations[volumeIndex].Filename); err != nil {
return err
}
os.Remove(vm.VolumeLocations[volumeIndex].DirectoryToCleanup)
volumeLocations := make([]proto.LocalVolume, 0, len(vm.VolumeLocations)-1)
volumes := make([]proto.Volume, 0, len(vm.VolumeLocations)-1)
for index, volume := range vm.VolumeLocations {
if uint(index) != volumeIndex {
volumeLocations = append(volumeLocations, volume)
volumes = append(volumes, vm.Volumes[index])
}
}
vm.VolumeLocations = volumeLocations
vm.Volumes = volumes
vm.writeAndSendInfo()
return nil
}
func (m *Manager) destroyVm(ipAddr net.IP, authInfo *srpc.AuthInformation,
accessToken []byte) error {
vm, err := m.getVmLockAndAuth(ipAddr, true, authInfo, accessToken)
if err != nil {
return err
}
defer vm.mutex.Unlock()
switch vm.State {
case proto.StateStarting:
return errors.New("VM is starting")
case proto.StateRunning:
if vm.DestroyProtection {
return errors.New("cannot destroy running VM when protected")
}
vm.setState(proto.StateDestroying)
vm.commandChannel <- "quit"