forked from juju/juju
/
client.go
274 lines (223 loc) · 7 KB
/
client.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package cloudsigma
import (
"github.com/altoros/gosigma"
"github.com/juju/errors"
"github.com/juju/loggo"
"github.com/juju/utils"
"github.com/juju/utils/arch"
"github.com/juju/juju/environs"
"github.com/juju/juju/environs/imagemetadata"
"github.com/juju/juju/instance"
"github.com/juju/juju/state/multiwatcher"
)
type environClient struct {
conn *gosigma.Client
uuid string
}
type tracer struct{}
func (tracer) Logf(format string, args ...interface{}) {
logger.Tracef(format, args...)
}
// newClient returns an instance of the CloudSigma client.
var newClient = func(cloud environs.CloudSpec, uuid string) (client *environClient, err error) {
logger.Debugf("creating CloudSigma client: id=%q", uuid)
credAttrs := cloud.Credential.Attributes()
username := credAttrs[credAttrUsername]
password := credAttrs[credAttrPassword]
// create connection to CloudSigma
conn, err := gosigma.NewClient(cloud.Endpoint, username, password, nil)
if err != nil {
return nil, err
}
// configure trace logger
if logger.LogLevel() <= loggo.TRACE {
conn.Logger(&tracer{})
}
client = &environClient{
conn: conn,
uuid: uuid,
}
return client, nil
}
const (
jujuMetaInstance = "juju-instance"
jujuMetaInstanceController = "controller"
jujuMetaInstanceServer = "server"
jujuMetaEnvironment = "juju-model"
jujuMetaCoudInit = "cloudinit-user-data"
jujuMetaBase64 = "base64_fields"
)
func (c *environClient) isMyEnvironment(s gosigma.Server) bool {
if v, ok := s.Get(jujuMetaEnvironment); ok && c.uuid == v {
return true
}
return false
}
func (c *environClient) isMyServer(s gosigma.Server) bool {
if _, ok := s.Get(jujuMetaInstance); ok {
return c.isMyEnvironment(s)
}
return false
}
// isMyController is used to filter servers in the CloudSigma account
func (c environClient) isMyController(s gosigma.Server) bool {
if v, ok := s.Get(jujuMetaInstance); ok && v == jujuMetaInstanceController {
return c.isMyEnvironment(s)
}
return false
}
// instances returns a list of CloudSigma servers for this environment
func (c *environClient) instances() ([]gosigma.Server, error) {
return c.conn.ServersFiltered(gosigma.RequestDetail, c.isMyServer)
}
// instanceMap of server ids to servers at CloudSigma account
func (c *environClient) instanceMap() (map[string]gosigma.Server, error) {
servers, err := c.conn.ServersFiltered(gosigma.RequestDetail, c.isMyServer)
if err != nil {
return nil, errors.Trace(err)
}
m := make(map[string]gosigma.Server, len(servers))
for _, s := range servers {
m[s.UUID()] = s
}
return m, nil
}
//getControllerIds get list of ids for all controller instances
func (c *environClient) getControllerIds() (ids []instance.Id, err error) {
logger.Tracef("query state...")
servers, err := c.conn.ServersFiltered(gosigma.RequestDetail, c.isMyController)
if err != nil {
return []instance.Id{}, errors.Trace(err)
}
if len(servers) == 0 {
return []instance.Id{}, environs.ErrNotBootstrapped
}
ids = make([]instance.Id, len(servers))
for i, server := range servers {
logger.Tracef("controller id: %s", server.UUID())
ids[i] = instance.Id(server.UUID())
}
return ids, nil
}
//stopInstance stops the CloudSigma server corresponding to the given instance ID.
func (c *environClient) stopInstance(id instance.Id) error {
uuid := string(id)
if uuid == "" {
return errors.New("invalid instance id")
}
s, err := c.conn.Server(uuid)
if err != nil {
return errors.Trace(err)
}
err = s.StopWait()
logger.Tracef("environClient.StopInstance - stop server, %q = %v", uuid, err)
err = s.Remove(gosigma.RecurseAllDrives)
logger.Tracef("environClient.StopInstance - remove server, %q = %v", uuid, err)
return nil
}
//newInstance creates and starts new instance.
func (c *environClient) newInstance(
args environs.StartInstanceParams,
img *imagemetadata.ImageMetadata,
userData []byte,
authorizedKeys string,
) (srv gosigma.Server, drv gosigma.Drive, ar string, err error) {
defer func() {
if err == nil {
return
}
if srv != nil {
srv.Remove(gosigma.RecurseAllDrives)
} else if drv != nil {
drv.Remove()
}
srv = nil
drv = nil
}()
if args.InstanceConfig == nil {
err = errors.New("invalid configuration for new instance: InstanceConfig is nil")
return nil, nil, "", err
}
logger.Debugf("Tools: %v", args.Tools.URLs())
logger.Debugf("Juju Constraints:" + args.Constraints.String())
logger.Debugf("InstanceConfig: %#v", args.InstanceConfig)
constraints := newConstraints(args.InstanceConfig.Bootstrap != nil, args.Constraints, img)
logger.Debugf("CloudSigma Constraints: %v", constraints)
originalDrive, err := c.conn.Drive(constraints.driveTemplate, gosigma.LibraryMedia)
if err != nil {
err = errors.Annotatef(err, "Failed to query drive template")
return nil, nil, "", err
}
baseName := "juju-" + c.uuid + "-" + args.InstanceConfig.MachineId
cloneParams := gosigma.CloneParams{Name: baseName}
if drv, err = originalDrive.CloneWait(cloneParams, nil); err != nil {
err = errors.Errorf("error cloning drive: %v", err)
return nil, nil, "", err
}
if drv.Size() < constraints.driveSize {
if err = drv.ResizeWait(constraints.driveSize); err != nil {
err = errors.Errorf("error resizing drive: %v", err)
return nil, nil, "", err
}
}
cc, err := c.generateSigmaComponents(
baseName, constraints, args, drv, userData, authorizedKeys,
)
if err != nil {
return nil, nil, "", errors.Trace(err)
}
if srv, err = c.conn.CreateServer(cc); err != nil {
err = errors.Annotatef(err, "error creating new instance")
return nil, nil, "", err
}
if err = srv.Start(); err != nil {
err = errors.Annotatef(err, "error booting new instance")
return nil, nil, "", err
}
// populate root drive hardware characteristics
switch originalDrive.Arch() {
case "64":
ar = arch.AMD64
case "32":
ar = arch.I386
default:
err = errors.Errorf("unknown arch: %v", ar)
return nil, nil, "", err
}
return srv, drv, ar, nil
}
func (c *environClient) generateSigmaComponents(
baseName string,
constraints *sigmaConstraints,
args environs.StartInstanceParams,
drv gosigma.Drive,
userData []byte,
authorizedKeys string,
) (cc gosigma.Components, err error) {
cc.SetName(baseName)
cc.SetDescription(baseName)
cc.SetSMP(constraints.cores)
cc.SetCPU(constraints.power)
cc.SetMem(constraints.mem)
vncpass, err := utils.RandomPassword()
if err != nil {
err = errors.Errorf("error generating password: %v", err)
return
}
cc.SetVNCPassword(vncpass)
logger.Debugf("Setting ssh key: %s end", authorizedKeys)
cc.SetSSHPublicKey(authorizedKeys)
cc.AttachDrive(1, "0:0", "virtio", drv.UUID())
cc.NetworkDHCP4(gosigma.ModelVirtio)
if multiwatcher.AnyJobNeedsState(args.InstanceConfig.Jobs...) {
cc.SetMeta(jujuMetaInstance, jujuMetaInstanceController)
} else {
cc.SetMeta(jujuMetaInstance, jujuMetaInstanceServer)
}
cc.SetMeta(jujuMetaEnvironment, c.uuid)
cc.SetMeta(jujuMetaCoudInit, string(userData))
cc.SetMeta(jujuMetaBase64, jujuMetaCoudInit)
return cc, nil
}