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xenserver.go
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xenserver.go
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package xenserver
import (
"archive/tar"
"bytes"
"crypto/rand"
"crypto/tls"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/docker/machine/libmachine/drivers"
"github.com/docker/machine/libmachine/log"
"github.com/docker/machine/libmachine/ssh"
"github.com/docker/machine/libmachine/state"
"github.com/docker/machine/libmachine/mcnutils"
"github.com/docker/machine/libmachine/mcnflag"
"github.com/nilshell/xmlrpc"
"golang.org/x/net/context"
xsclient "github.com/xenserver/go-xenserver-client"
)
const (
isoOnlineURL = "https://github.com/xenserver/boot2docker/releases/download/v1.7.0-xentools/boot2docker-v1.7.0-xentools.iso"
isoFilename = "boot2docker.iso"
tarFilename = "boot2docker.tar"
osTemplateLabelName = "Other install media"
B2D_USER = "docker"
B2D_PASS = "tcuser"
)
type Driver struct {
*drivers.BaseDriver
Server string
Username string
Password string
Boot2DockerURL string
CPU uint
Memory uint
DiskSize uint
SR string
Network string
Host string
ISO string
TAR string
UploadTimeout uint
WaitTimeout uint
CaCertPath string
PrivateKeyPath string
xenAPIClient *XenAPIClient
}
// GetCreateFlags registers the flags this driver adds to
// "docker hosts create"
func (d *Driver) GetCreateFlags() []mcnflag.Flag {
return []mcnflag.Flag{
mcnflag.StringFlag{
EnvVar: "XENSERVER_SERVER",
Name: "xenserver-server",
Usage: "XenServer server hostname/IP for docker VM",
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_USERNAME",
Name: "xenserver-username",
Usage: "XenServer username",
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_PASSWORD",
Name: "xenserver-password",
Usage: "XenServer password",
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_BOOT2DOCKER_URL",
Name: "xenserver-boot2docker-url",
Usage: "XenServer URL for boot2docker image",
Value: isoOnlineURL,
},
mcnflag.IntFlag{
EnvVar: "XENSERVER_VCPU_COUNT",
Name: "xenserver-vcpu-count",
Usage: "XenServer vCPU number for docker VM",
Value: 1,
},
mcnflag.IntFlag{
EnvVar: "XENSERVER_MEMORY_SIZE",
Name: "xenserver-memory-size",
Usage: "XenServer size of memory for docker VM (in MB)",
Value: 1024,
},
mcnflag.IntFlag{
EnvVar: "XENSERVER_DISK_SIZE",
Name: "xenserver-disk-size",
Usage: "XenServer size of disk for docker VM (in MB)",
Value: 5120,
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_SR_LABEL",
Name: "xenserver-sr-label",
Usage: "XenServer SR label where the docker VM will be attached",
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_NETWORK_LABEL",
Name: "xenserver-network-label",
Usage: "XenServer network label where the docker VM will be attached",
},
mcnflag.StringFlag{
EnvVar: "XENSERVER_HOST_LABEL",
Name: "xenserver-host-label",
Usage: "XenServer host label where the docker VM will be run",
},
mcnflag.IntFlag{
EnvVar: "XENSERVER_UPLOAD_TIMEOUT",
Name: "xenserver-upload-timeout",
Usage: "XenServer upload VDI timeout(seconds)",
Value: 5 * 60,
},
mcnflag.IntFlag{
EnvVar: "XENSERVER_WAIT_TIMEOUT",
Name: "xenserver-wait-timeout",
Usage: "XenServer wait VM start timeout(seconds)",
Value: 30 * 60,
},
}
}
func NewDriver() *Driver {
return &Driver{}
}
func (d *Driver) GetMachineName() string {
return d.MachineName
}
func (d *Driver) GetSSHHostname() (string, error) {
return d.GetIP()
}
func (d *Driver) GetSSHKeyPath() string {
return filepath.Join(d.StorePath, "id_rsa")
}
func (d *Driver) GetSSHPort() (int, error) {
if d.SSHPort == 0 {
d.SSHPort = 22
}
return d.SSHPort, nil
}
func (d *Driver) GetSSHUsername() string {
if d.SSHUser == "" {
d.SSHUser = B2D_USER
}
return d.SSHUser
}
func (d *Driver) DriverName() string {
return "xenserver"
}
func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
d.SSHUser = B2D_USER
d.SSHPort = 22
d.Server = flags.String("xenserver-server")
d.Username = flags.String("xenserver-username")
d.Password = flags.String("xenserver-password")
d.Boot2DockerURL = flags.String("xenserver-boot2docker-url")
d.CPU = uint(flags.Int("xenserver-vcpu-count"))
d.Memory = uint(flags.Int("xenserver-memory-size"))
d.DiskSize = uint(flags.Int("xenserver-disk-size"))
d.SR = flags.String("xenserver-sr-label")
d.Network = flags.String("xenserver-network-label")
d.Host = flags.String("xenserver-host-label")
d.UploadTimeout = uint(flags.Int("xenserver-upload-timeout"))
d.WaitTimeout = uint(flags.Int("xenserver-wait-timeout"))
d.SwarmMaster = flags.Bool("swarm-master")
d.SwarmHost = flags.String("swarm-host")
d.SwarmDiscovery = flags.String("swarm-discovery")
d.ISO = filepath.Join(d.StorePath, isoFilename)
d.TAR = filepath.Join(d.StorePath, tarFilename)
return nil
}
func (d *Driver) GetURL() (string, error) {
ip, _ := d.GetIP()
if ip == "" {
return "", nil
}
return fmt.Sprintf("tcp://%s:2376", ip), nil
}
func (d *Driver) GetIP() (string, error) {
status, err := d.GetState()
if err != nil {
return "", err
}
if status != state.Running {
return "", fmt.Errorf("Docker VM(%v) is not running", d.MachineName)
}
// Need Login first if it is a fresh session
c, err := d.GetXenAPIClient()
if err != nil {
return "", err
}
// Get doker machine by label name
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return "", err
}
// Get docker machine VM metrics
metrics, err := vm.GetGuestMetrics()
if err != nil {
return "", err
}
// Get networks metrics
networks, ok := metrics["networks"]
if !ok {
return "", fmt.Errorf("Docker VM(%v) get network metrics error: \"networks\" not presented", d.MachineName)
}
net, ok := networks.(xmlrpc.Struct)
if !ok {
return "", fmt.Errorf("Docker VM(%v) get network metrics error: \"networks\" is not a xmlrpc.Struct instance", d.MachineName)
}
for i := 0; i < len(net); i++ {
ip, ok := net[fmt.Sprintf("%d/ip", i)]
if ok && ip != "" {
return ip.(string), nil
}
}
return "", fmt.Errorf("Docker VM(%v) get ipaddr error", d.MachineName)
}
func (d *Driver) GetState() (state.State, error) {
var err error
// Need Login first if it is a fresh session
c, err := d.GetXenAPIClient()
if err != nil {
return state.None, err
}
// Get docker machine VM by label name
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return state.None, err
}
// Get doker machine VM power state
powerState, err := vm.GetPowerState()
if err != nil {
return state.None, err
}
// https://github.com/xapi-project/xen-api/blob/cacbb2d3c5996efbf4cf117ab862439271a8cecd/ocaml/client_records/record_util.ml#L20
switch strings.ToLower(powerState) {
case "halted":
return state.Stopped, nil
case "paused":
return state.Paused, nil
case "running":
return state.Running, nil
case "suspended":
return state.Paused, nil
case "shutting down":
return state.Stopping, nil
case "migrating":
return state.Running, nil
}
return state.None, nil
}
func (d *Driver) PreCreateCheck() error {
return nil
}
func (d *Driver) Create() error {
var err error
d.setMachineNameIfNotSet()
// Download boot2docker ISO from Internet
var isoURL string
b2dutils := mcnutils.NewB2dUtils(d.StorePath)
if d.Boot2DockerURL != "" {
isoURL = d.Boot2DockerURL
} else {
isoURL, err = b2dutils.GetLatestBoot2DockerReleaseURL("")
if err != nil {
log.Errorf("Unable to check for the latest release: %s", err)
return err
}
}
log.Infof("Downloading %s from %s...", isoFilename, isoURL)
if err := b2dutils.DownloadISO(d.StorePath, isoFilename, isoURL); err != nil {
return err
}
log.Infof("Logging into XenServer %s...", d.Server)
c, err := d.GetXenAPIClient()
if err != nil {
return err
}
// Generate SSH Keys
log.Infof("Creating SSH key...")
if err := ssh.GenerateSSHKey(d.sshKeyPath()); err != nil {
return err
}
log.Infof("Creating ISO VDI...")
// Get the SR
var sr *xsclient.SR
if d.SR == "" {
sr, err = c.GetDefaultSR()
} else {
sr, err = c.GetUniqueSRByNameLabel(d.SR)
}
if err != nil {
return err
}
isoFileInfo, err := os.Stat(d.ISO)
if err != nil {
return err
}
// Create the VDI
isoVdi, err := sr.CreateVdi(isoFilename, isoFileInfo.Size())
if err != nil {
log.Errorf("Unable to create ISO VDI '%s': %v", isoFilename, err)
return err
}
// Import the VDI
if err = d.importVdi(isoVdi, d.ISO, time.Duration(d.UploadTimeout)*time.Second); err != nil {
return err
}
isoVdiUuid, err := isoVdi.GetUuid()
if err != nil {
return err
}
log.Infof("Creating Disk VDI...")
err = d.generateDiskImage()
if err != nil {
return err
}
// Create the VDI
diskVdi, err := sr.CreateVdi("bootdocker disk", int64(d.DiskSize)*1024*1024)
if err != nil {
log.Errorf("Unable to create ISO VDI '%s': %v", "bootdocker disk", err)
return err
}
if err = d.importVdi(diskVdi, d.TAR, time.Duration(d.UploadTimeout)*time.Second); err != nil {
return err
}
diskVdiUuid, err := diskVdi.GetUuid()
if err != nil {
return err
}
log.Infof("Creating VM...")
vm0, err := c.GetUniqueVMByNameLabel(osTemplateLabelName)
if err != nil {
return err
}
// Clone VM from VM template
vm, err := vm0.Clone(fmt.Sprintf("__gui__%s", d.MachineName))
if err != nil {
return err
}
vmMacSeed, err := pseudoUuid()
if err != nil {
return err
}
hostname, err := os.Hostname()
if err != nil {
log.Errorf("Unable get local hostname")
}
otherConfig := map[string]string{
"base_template_name": osTemplateLabelName,
"install-methods": "cdrom,nfs,http,ftp",
"linux_template": "true",
"mac_seed": vmMacSeed,
"docker-machine-creator": hostname,
}
err = vm.SetOtherConfig(otherConfig)
if err != nil {
return err
}
log.Infof("Provision VM...")
err = vm.Provision()
if err != nil {
return err
}
// Set machine name
err = vm.SetNameLabel(d.MachineName)
if err != nil {
return err
}
// Set vCPU number
err = vm.SetVCPUsMax(d.CPU)
if err != nil {
return err
}
err = vm.SetVCPUsAtStartup(d.CPU)
if err != nil {
return err
}
platform_params := map[string]string{
"acpi": "1",
"apic": "true",
"cores-per-socket": "1",
"device_id": "0001",
"nx": "true",
"pae": "true",
"vga": "std",
"videoram": "8",
"viridian": "false",
}
err = vm.SetPlatform(platform_params)
if err != nil {
return err
}
// Set machine memory size
err = vm.SetStaticMemoryRange(uint64(d.Memory)*1024*1024, uint64(d.Memory)*1024*1024)
if err != nil {
return err
}
log.Infof("Add ISO VDI to VM...")
diskVdi, err = c.GetVdiByUuid(isoVdiUuid)
if err != nil {
return err
}
err = vm.ConnectVdi(diskVdi, xsclient.Disk, "0")
if err != nil {
return err
}
log.Infof("Add Disk VDI to VM...")
diskVdi, err = c.GetVdiByUuid(diskVdiUuid)
if err != nil {
return err
}
err = vm.ConnectVdi(diskVdi, xsclient.Disk, "1")
if err != nil {
return err
}
log.Infof("Add Network to VM...")
var networks []*xsclient.Network
if d.Network == "" {
networks1, err := c.GetNetworks()
if err != nil {
return err
}
for _, network := range networks1 {
otherConfig, err := network.GetOtherConfig()
if err != nil {
return err
}
isInternal, ok := otherConfig["is_host_internal_management_network"]
if ok && isInternal == "true" {
continue
}
automaitc, ok := otherConfig["automatic"]
if ok && automaitc == "false" {
continue
}
networks = append(networks, network)
}
} else {
network, err := c.GetUniqueNetworkByNameLabel(d.Network)
if err != nil {
return err
}
networks = append(networks, network)
}
if len(networks) == 0 {
return fmt.Errorf("Unable get available networks for %v", d.MachineName)
}
vifDevices, err := vm.GetAllowedVIFDevices()
if err != nil {
return err
}
if len(vifDevices) < len(networks) {
log.Warnf("VM(%s) networks number is limited to %d.", d.MachineName, len(vifDevices))
networks = networks[:len(vifDevices)]
}
for i, network := range networks {
_, err = vm.ConnectNetwork(network, vifDevices[i])
if err != nil {
return err
}
}
log.Infof("Starting VM...")
if d.Host == "" {
if err = vm.Start(false, false); err != nil {
return err
}
} else {
host, err := c.GetUniqueHostByNameLabel(d.Host)
if err != nil {
return err
}
if err = vm.StartOn(host, false, false); err != nil {
return err
}
}
if err := d.wait(time.Duration(d.WaitTimeout) * time.Second); err != nil {
return err
}
log.Infof("VM Created.")
return nil
}
func (d *Driver) wait(timeout time.Duration) (err error) {
log.Infof("Waiting for VM to start...")
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
out := make(chan error, 1)
go func(ctx context.Context, out chan<- error) {
var ip string
for {
ip, _ = d.GetIP()
if ip != "" {
break
}
if t, ok := ctx.Deadline(); ok && time.Now().After(t) {
out <- fmt.Errorf("Wait GetIP timed out")
return
}
time.Sleep(1 * time.Second)
}
port, err := d.GetSSHPort()
if err != nil {
out <- err
return
}
addr := fmt.Sprintf("%s:%d", ip, port)
log.Infof("Got VM address(%v), Now (not) waiting for SSH", addr)
// out <- ssh.WaitForTCP(addr)
}(ctx, out)
select {
case err := <-out:
return err
case <-ctx.Done():
return fmt.Errorf("Wait for VM to start timed out: %v", ctx.Err())
}
return nil
}
func (d *Driver) Start() error {
var err error
c, err := d.GetXenAPIClient()
if err != nil {
return err
}
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return err
}
if err = vm.Start(false, true); err != nil {
return err
}
if err = d.wait(time.Duration(d.WaitTimeout) * time.Second); err != nil {
return err
}
return nil
}
func (d *Driver) Stop() error {
var err error
c, err := d.GetXenAPIClient()
if err != nil {
return err
}
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return err
}
if err = vm.CleanShutdown(); err != nil {
return err
}
return nil
}
func (d *Driver) Remove() error {
var err error
c, err := d.GetXenAPIClient()
if err != nil {
return err
}
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return err
}
vmState, err := d.GetState()
if err != nil {
return err
}
switch vmState {
case state.None:
return fmt.Errorf("Unable get VM(%v) state.", d.MachineName)
case state.Stopping:
return fmt.Errorf("VM(%v) state is stopping, please wait.", d.MachineName)
case state.Stopped:
break
case state.Paused:
if err = vm.HardShutdown(); err != nil {
return err
}
default:
if err = vm.CleanShutdown(); err != nil {
if err = vm.HardShutdown(); err != nil {
return err
}
}
}
disks, err := vm.GetDisks()
if err != nil {
return err
}
for _, disk := range disks {
if err = disk.Destroy(); err != nil {
return err
}
}
if err = vm.Destroy(); err != nil {
return err
}
return nil
}
func (d *Driver) Restart() error {
if err := d.Stop(); err != nil {
return err
}
return d.Start()
}
func (d *Driver) Kill() error {
var err error
c, err := d.GetXenAPIClient()
if err != nil {
return err
}
vm, err := c.GetUniqueVMByNameLabel(d.MachineName)
if err != nil {
return err
}
if err = vm.HardShutdown(); err != nil {
return err
}
return nil
}
func (d *Driver) setMachineNameIfNotSet() {
if d.MachineName == "" {
d.MachineName = fmt.Sprintf("docker-machine-unknown")
}
}
func (d *Driver) sshKeyPath() string {
return filepath.Join(d.StorePath, "id_rsa")
}
func (d *Driver) publicSSHKeyPath() string {
return d.sshKeyPath() + ".pub"
}
// Make a boot2docker VM disk image.
func (d *Driver) generateDiskImage() error {
magicString := "boot2docker, please format-me"
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
log.Infof("Generate Disk Image...")
// magicString first so the automount script knows to format the disk
file := &tar.Header{Name: magicString, Size: int64(len(magicString))}
if err := tw.WriteHeader(file); err != nil {
return err
}
if _, err := tw.Write([]byte(magicString)); err != nil {
return err
}
// .ssh/key.pub => authorized_keys
file = &tar.Header{Name: ".ssh", Typeflag: tar.TypeDir, Mode: 0700}
if err := tw.WriteHeader(file); err != nil {
return err
}
pubKey, err := ioutil.ReadFile(d.publicSSHKeyPath())
if err != nil {
return err
}
file = &tar.Header{Name: ".ssh/authorized_keys", Size: int64(len(pubKey)), Mode: 0644}
if err := tw.WriteHeader(file); err != nil {
return err
}
if _, err := tw.Write([]byte(pubKey)); err != nil {
return err
}
file = &tar.Header{Name: ".ssh/authorized_keys2", Size: int64(len(pubKey)), Mode: 0644}
if err := tw.WriteHeader(file); err != nil {
return err
}
if _, err := tw.Write([]byte(pubKey)); err != nil {
return err
}
if err := tw.Close(); err != nil {
return err
}
if err := ioutil.WriteFile(d.TAR, buf.Bytes(), 0644); err != nil {
return err
}
return nil
}
func (d *Driver) GetXenAPIClient() (*XenAPIClient, error) {
if d.xenAPIClient == nil {
c := NewXenAPIClient(d.Server, d.Username, d.Password)
if err := c.Login(); err != nil {
return nil, err
}
d.xenAPIClient = &c
}
return d.xenAPIClient, nil
}
func (d *Driver) importVdi(vdi *xsclient.VDI, filename string, timeout time.Duration) error {
f, err := os.Open(filename)
if err != nil {
log.Errorf("Unable to open disk image '%s': %v", filename, err)
return err
}
// Get file length
fi, err := f.Stat()
if err != nil {
log.Errorf("Unable to stat disk image '%s': %v", filename, err)
return err
}
task, err := vdi.Client.CreateTask()
if err != nil {
return fmt.Errorf("Unable to create task: %v", err)
}
urlStr := fmt.Sprintf("https://%s/import_raw_vdi?vdi=%s&session_id=%s&task_id=%s",
vdi.Client.Host, vdi.Ref, vdi.Client.Session.(string), task.Ref)
// Define a new http Transport which allows self-signed certs
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
req, err := http.NewRequest("PUT", urlStr, f)
if err != nil {
return err
}
req.ContentLength = fi.Size()
resp, err := tr.RoundTrip(req)
if err != nil {
log.Errorf("Unable to upload VDI: %v", err)
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
msg, _ := ioutil.ReadAll(resp.Body)
err = fmt.Errorf("xenserver reply %s: %v", resp.Status, string(msg))
log.Errorf("Unable to upload VDI: %v", err)
return err
}
log.Infof("Waiting Upload VDI task(%v) to complete...", task.Ref)
if err = d.waitTask(task, timeout); err != nil {
return err
}
return nil
}
func (d *Driver) waitTask(task *xsclient.Task, timeout time.Duration) error {
timeout_at := time.Now().Add(timeout)
for {
status, err := task.GetStatus()
if err != nil {
return fmt.Errorf("Failed to get task status: %s", err.Error())
}
if status == xsclient.Success {
log.Infof("Upload VDI task(%s) completed", task.Ref)
break
}
switch status {
case xsclient.Pending:
progress, err := task.GetProgress()
if err != nil {
return fmt.Errorf("Failed to get progress: %s", err.Error())
}
log.Debugf("Upload %.0f%% complete", progress*100)
log.Infof("Uploading...")
case xsclient.Failure:
errorInfo, err := task.GetErrorInfo()
if err != nil {
errorInfo = []string{fmt.Sprintf("furthermore, failed to get error info: %s", err.Error())}
}
return fmt.Errorf("Task failed: %s", errorInfo)
case xsclient.Cancelling, xsclient.Cancelled:
return fmt.Errorf("Task Cancelled")
default:
return fmt.Errorf("Unknown task status %v", status)
}
if time.Now().After(timeout_at) {
return fmt.Errorf("Upload VDI task(%s) timed out", task.Ref)
}
time.Sleep(5 * time.Second)
}
return nil
}
func pseudoUuid() (string, error) {
b := make([]byte, 16)
_, err := io.ReadFull(rand.Reader, b)
if err != nil {
return "", err
}
uuid := fmt.Sprintf("%x-%x-%x-%x-%x", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
return uuid, nil
}