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exoscale.go
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exoscale.go
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package exoscale
import (
"bytes"
"fmt"
"io/ioutil"
"net"
"strings"
"text/template"
"time"
"github.com/docker/machine/libmachine/drivers"
"github.com/docker/machine/libmachine/log"
"github.com/docker/machine/libmachine/mcnflag"
"github.com/docker/machine/libmachine/mcnutils"
"github.com/docker/machine/libmachine/state"
"github.com/pyr/egoscale/src/egoscale"
)
type Driver struct {
*drivers.BaseDriver
URL string
APIKey string `json:"ApiKey"`
APISecretKey string `json:"ApiSecretKey"`
InstanceProfile string
DiskSize int
Image string
SecurityGroup string
AvailabilityZone string
KeyPair string
PublicKey string
ID string `json:"Id"`
}
const (
defaultInstanceProfile = "small"
defaultDiskSize = 50
defaultImage = "ubuntu-15.10"
defaultAvailabilityZone = "ch-gva-2"
)
// GetCreateFlags registers the flags this driver adds to
// "docker hosts create"
func (d *Driver) GetCreateFlags() []mcnflag.Flag {
return []mcnflag.Flag{
mcnflag.StringFlag{
EnvVar: "EXOSCALE_ENDPOINT",
Name: "exoscale-url",
Usage: "exoscale API endpoint",
},
mcnflag.StringFlag{
EnvVar: "EXOSCALE_API_KEY",
Name: "exoscale-api-key",
Usage: "exoscale API key",
},
mcnflag.StringFlag{
EnvVar: "EXOSCALE_API_SECRET",
Name: "exoscale-api-secret-key",
Usage: "exoscale API secret key",
},
mcnflag.StringFlag{
EnvVar: "EXOSCALE_INSTANCE_PROFILE",
Name: "exoscale-instance-profile",
Value: defaultInstanceProfile,
Usage: "exoscale instance profile (small, medium, large, ...)",
},
mcnflag.IntFlag{
EnvVar: "EXOSCALE_DISK_SIZE",
Name: "exoscale-disk-size",
Value: defaultDiskSize,
Usage: "exoscale disk size (10, 50, 100, 200, 400)",
},
mcnflag.StringFlag{
EnvVar: "EXSOCALE_IMAGE",
Name: "exoscale-image",
Value: defaultImage,
Usage: "exoscale image template",
},
mcnflag.StringSliceFlag{
EnvVar: "EXOSCALE_SECURITY_GROUP",
Name: "exoscale-security-group",
Value: []string{},
Usage: "exoscale security group",
},
mcnflag.StringFlag{
EnvVar: "EXOSCALE_AVAILABILITY_ZONE",
Name: "exoscale-availability-zone",
Value: defaultAvailabilityZone,
Usage: "exoscale availibility zone",
},
}
}
func NewDriver(hostName, storePath string) drivers.Driver {
return &Driver{
InstanceProfile: defaultInstanceProfile,
DiskSize: defaultDiskSize,
Image: defaultImage,
AvailabilityZone: defaultAvailabilityZone,
BaseDriver: &drivers.BaseDriver{
MachineName: hostName,
StorePath: storePath,
},
}
}
func (d *Driver) GetSSHHostname() (string, error) {
return d.GetIP()
}
func (d *Driver) GetSSHUsername() string {
return "ubuntu"
}
// DriverName returns the name of the driver
func (d *Driver) DriverName() string {
return "exoscale"
}
func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
d.URL = flags.String("exoscale-endpoint")
d.APIKey = flags.String("exoscale-api-key")
d.APISecretKey = flags.String("exoscale-api-secret-key")
d.InstanceProfile = flags.String("exoscale-instance-profile")
d.DiskSize = flags.Int("exoscale-disk-size")
d.Image = flags.String("exoscale-image")
securityGroups := flags.StringSlice("exoscale-security-group")
if len(securityGroups) == 0 {
securityGroups = []string{"docker-machine"}
}
d.SecurityGroup = strings.Join(securityGroups, ",")
d.AvailabilityZone = flags.String("exoscale-availability-zone")
d.SetSwarmConfigFromFlags(flags)
if d.URL == "" {
d.URL = "https://api.exoscale.ch/compute"
}
if d.APIKey == "" || d.APISecretKey == "" {
return fmt.Errorf("Please specify an API key (--exoscale-api-key) and an API secret key (--exoscale-api-secret-key).")
}
return nil
}
func (d *Driver) GetURL() (string, error) {
ip, err := d.GetIP()
if err != nil {
return "", err
}
return fmt.Sprintf("tcp://%s", net.JoinHostPort(ip, "2376")), nil
}
func (d *Driver) GetState() (state.State, error) {
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
vm, err := client.GetVirtualMachine(d.ID)
if err != nil {
return state.Error, err
}
switch vm.State {
case "Starting":
return state.Starting, nil
case "Running":
return state.Running, nil
case "Stopping":
return state.Running, nil
case "Stopped":
return state.Stopped, nil
case "Destroyed":
return state.Stopped, nil
case "Expunging":
return state.Stopped, nil
case "Migrating":
return state.Paused, nil
case "Error":
return state.Error, nil
case "Unknown":
return state.Error, nil
case "Shutdowned":
return state.Stopped, nil
}
return state.None, nil
}
func (d *Driver) createDefaultSecurityGroup(client *egoscale.Client, group string) (string, error) {
rules := []egoscale.SecurityGroupRule{
{
SecurityGroupId: "",
Cidr: "0.0.0.0/0",
Protocol: "TCP",
Port: 22,
},
{
SecurityGroupId: "",
Cidr: "0.0.0.0/0",
Protocol: "TCP",
Port: 2376,
},
{
SecurityGroupId: "",
Cidr: "0.0.0.0/0",
Protocol: "TCP",
Port: 3376,
},
{
SecurityGroupId: "",
Cidr: "0.0.0.0/0",
Protocol: "ICMP",
IcmpType: 8,
IcmpCode: 0,
},
}
sgresp, err := client.CreateSecurityGroupWithRules(
group,
rules,
make([]egoscale.SecurityGroupRule, 0, 0))
if err != nil {
return "", err
}
sg := sgresp.Id
return sg, nil
}
func (d *Driver) Create() error {
log.Infof("Querying exoscale for the requested parameters...")
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
topology, err := client.GetTopology()
if err != nil {
return err
}
// Availability zone UUID
zone, ok := topology.Zones[d.AvailabilityZone]
if !ok {
return fmt.Errorf("Availability zone %v doesn't exist",
d.AvailabilityZone)
}
log.Debugf("Availability zone %v = %s", d.AvailabilityZone, zone)
// Image UUID
var tpl string
images, ok := topology.Images[strings.ToLower(d.Image)]
if ok {
tpl, ok = images[d.DiskSize]
}
if !ok {
return fmt.Errorf("Unable to find image %v with size %d",
d.Image, d.DiskSize)
}
log.Debugf("Image %v(%d) = %s", d.Image, d.DiskSize, tpl)
// Profile UUID
profile, ok := topology.Profiles[strings.ToLower(d.InstanceProfile)]
if !ok {
return fmt.Errorf("Unable to find the %s profile",
d.InstanceProfile)
}
log.Debugf("Profile %v = %s", d.InstanceProfile, profile)
// Security groups
securityGroups := strings.Split(d.SecurityGroup, ",")
sgs := make([]string, len(securityGroups))
for idx, group := range securityGroups {
sg, ok := topology.SecurityGroups[group]
if !ok {
log.Infof("Security group %v does not exist, create it",
group)
sg, err = d.createDefaultSecurityGroup(client, group)
if err != nil {
return err
}
}
log.Debugf("Security group %v = %s", group, sg)
sgs[idx] = sg
}
log.Infof("Generate an SSH keypair...")
keypairName := fmt.Sprintf("docker-machine-%s", d.MachineName)
kpresp, err := client.CreateKeypair(keypairName)
if err != nil {
return err
}
err = ioutil.WriteFile(d.GetSSHKeyPath(), []byte(kpresp.Privatekey), 0600)
if err != nil {
return err
}
d.KeyPair = keypairName
log.Infof("Spawn exoscale host...")
userdata, err := d.getCloudInit()
if err != nil {
return err
}
log.Debugf("Using the following cloud-init file:")
log.Debugf("%s", userdata)
machineProfile := egoscale.MachineProfile{
Template: tpl,
ServiceOffering: profile,
SecurityGroups: sgs,
Userdata: userdata,
Zone: zone,
Keypair: d.KeyPair,
Name: d.MachineName,
}
cvmresp, err := client.CreateVirtualMachine(machineProfile)
if err != nil {
return err
}
vm, err := d.waitForVM(client, cvmresp)
if err != nil {
return err
}
d.IPAddress = vm.Nic[0].Ipaddress
d.ID = vm.Id
return nil
}
func (d *Driver) Start() error {
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
svmresp, err := client.StartVirtualMachine(d.ID)
if err != nil {
return err
}
return d.waitForJob(client, svmresp)
}
func (d *Driver) Stop() error {
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
svmresp, err := client.StopVirtualMachine(d.ID)
if err != nil {
return err
}
return d.waitForJob(client, svmresp)
}
func (d *Driver) Restart() error {
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
svmresp, err := client.RebootVirtualMachine(d.ID)
if err != nil {
return err
}
return d.waitForJob(client, svmresp)
}
func (d *Driver) Kill() error {
return d.Stop()
}
func (d *Driver) Remove() error {
client := egoscale.NewClient(d.URL, d.APIKey, d.APISecretKey)
// Destroy the SSH key
if _, err := client.DeleteKeypair(d.KeyPair); err != nil {
return err
}
// Destroy the virtual machine
dvmresp, err := client.DestroyVirtualMachine(d.ID)
if err != nil {
return err
}
if err = d.waitForJob(client, dvmresp); err != nil {
return err
}
return nil
}
func (d *Driver) jobIsDone(client *egoscale.Client, jobid string) (bool, error) {
resp, err := client.PollAsyncJob(jobid)
if err != nil {
return true, err
}
switch resp.Jobstatus {
case 0: // Job is still in progress
case 1: // Job has successfully completed
return true, nil
case 2: // Job has failed to complete
return true, fmt.Errorf("Operation failed to complete")
default: // Some other code
}
return false, nil
}
func (d *Driver) waitForJob(client *egoscale.Client, jobid string) error {
log.Infof("Waiting for job to complete...")
return mcnutils.WaitForSpecificOrError(func() (bool, error) {
return d.jobIsDone(client, jobid)
}, 60, 2*time.Second)
}
func (d *Driver) waitForVM(client *egoscale.Client, jobid string) (*egoscale.DeployVirtualMachineResponse, error) {
if err := d.waitForJob(client, jobid); err != nil {
return nil, err
}
resp, err := client.PollAsyncJob(jobid)
if err != nil {
return nil, err
}
vm, err := client.AsyncToVirtualMachine(*resp)
if err != nil {
return nil, err
}
return vm, nil
}
// Build a cloud-init user data string that will install and run
// docker.
func (d *Driver) getCloudInit() (string, error) {
const tpl = `#cloud-config
manage_etc_hosts: true
fqdn: {{ .MachineName }}
resize_rootfs: true
`
var buffer bytes.Buffer
tmpl, err := template.New("cloud-init").Parse(tpl)
if err != nil {
return "", err
}
err = tmpl.Execute(&buffer, d)
if err != nil {
return "", err
}
return buffer.String(), nil
}