func (k *Krud) update(h *Webhook) error {
h.UpdateAttempt = true
h.UpdateStart = time.Now()
defer func() {
h.UpdateEnd = time.Now()
}()
conf := &client.Config{
Host: k.Endpoint,
}
client, err := client.New(conf)
if err != nil {
return err
}
rcs := client.ReplicationControllers(k.Namespace)
oldRc, err := rcs.Get(k.ControllerName)
if err != nil {
return err
}
newRc, err := rcs.Get(k.ControllerName)
if err != nil {
return err
}
hash, err := api.HashObject(oldRc, client.Codec)
if err != nil {
return err
}
h.UpdateID = hash
newRc.Name = fmt.Sprintf("%s-%s", k.ControllerName, hash)
newRc.ResourceVersion = ""
apply := func(key, value string, ms ...map[string]string) {
for _, m := range ms {
m[key] = value
}
}
apply(k.DeploymentKey, hash, newRc.Spec.Selector, newRc.Spec.Template.Labels)
apply("run", k.ControllerName, newRc.Spec.Selector, newRc.Spec.Template.Labels)
ruconf := kubectl.RollingUpdaterConfig{
Out: &lockBuffer{
k: k,
h: h,
},
OldRc: oldRc,
NewRc: newRc,
UpdatePeriod: time.Second * 3, // todo: change to time.Minute
Timeout: time.Minute * 5,
Interval: time.Second * 3,
UpdateAcceptor: kubectl.DefaultUpdateAcceptor,
CleanupPolicy: kubectl.RenameRollingUpdateCleanupPolicy,
}
ruc := kubectl.NewRollingUpdaterClient(client)
println("doing rolling update")
err = kubectl.NewRollingUpdater(k.Namespace, ruc).Update(&ruconf)
println("done")
k.Lock()
h.UpdateSuccess = err == nil
k.Unlock()
return err
}
func RunRollingUpdate(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string) error {
if len(os.Args) > 1 && os.Args[1] == "rollingupdate" {
printDeprecationWarning("rolling-update", "rollingupdate")
}
deploymentKey, filename, image, oldName, err := validateArguments(cmd, args)
if err != nil {
return err
}
period := cmdutil.GetFlagDuration(cmd, "update-period")
interval := cmdutil.GetFlagDuration(cmd, "poll-interval")
timeout := cmdutil.GetFlagDuration(cmd, "timeout")
dryrun := cmdutil.GetFlagBool(cmd, "dry-run")
cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
if err != nil {
return err
}
client, err := f.Client()
if err != nil {
return err
}
updaterClient := kubectl.NewRollingUpdaterClient(client)
var newRc *api.ReplicationController
// fetch rc
oldRc, err := client.ReplicationControllers(cmdNamespace).Get(oldName)
if err != nil {
if !errors.IsNotFound(err) || len(image) == 0 || len(args) > 1 {
return err
}
// We're in the middle of a rename, look for an RC with a source annotation of oldName
newRc, err := kubectl.FindSourceController(updaterClient, cmdNamespace, oldName)
if err != nil {
return err
}
return kubectl.Rename(kubectl.NewRollingUpdaterClient(client), newRc, oldName)
}
var keepOldName bool
var replicasDefaulted bool
mapper, typer := f.Object()
if len(filename) != 0 {
schema, err := f.Validator()
if err != nil {
return err
}
request := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
Schema(schema).
NamespaceParam(cmdNamespace).DefaultNamespace().
FilenameParam(enforceNamespace, filename).
Do()
obj, err := request.Object()
if err != nil {
return err
}
var ok bool
// Handle filename input from stdin. The resource builder always returns an api.List
// when creating resource(s) from a stream.
if list, ok := obj.(*api.List); ok {
if len(list.Items) > 1 {
return cmdutil.UsageError(cmd, "%s specifies multiple items", filename)
}
obj = list.Items[0]
}
newRc, ok = obj.(*api.ReplicationController)
if !ok {
if _, kind, err := typer.ObjectVersionAndKind(obj); err == nil {
return cmdutil.UsageError(cmd, "%s contains a %s not a ReplicationController", filename, kind)
}
glog.V(4).Infof("Object %#v is not a ReplicationController", obj)
return cmdutil.UsageError(cmd, "%s does not specify a valid ReplicationController", filename)
}
infos, err := request.Infos()
if err != nil || len(infos) != 1 {
glog.V(2).Infof("was not able to recover adequate information to discover if .spec.replicas was defaulted")
} else {
replicasDefaulted = isReplicasDefaulted(infos[0])
}
}
// If the --image option is specified, we need to create a new rc with at least one different selector
// than the old rc. This selector is the hash of the rc, which will differ because the new rc has a
// different image.
if len(image) != 0 {
keepOldName = len(args) == 1
newName := findNewName(args, oldRc)
if newRc, err = kubectl.LoadExistingNextReplicationController(client, cmdNamespace, newName); err != nil {
return err
}
if newRc != nil {
fmt.Fprintf(out, "Found existing update in progress (%s), resuming.\n", newRc.Name)
} else {
newRc, err = kubectl.CreateNewControllerFromCurrentController(client, cmdNamespace, oldName, newName, image, deploymentKey)
if err != nil {
return err
}
}
// Update the existing replication controller with pointers to the 'next' controller
// and adding the <deploymentKey> label if necessary to distinguish it from the 'next' controller.
oldHash, err := api.HashObject(oldRc, client.Codec)
if err != nil {
return err
}
oldRc, err = kubectl.UpdateExistingReplicationController(client, oldRc, cmdNamespace, newRc.Name, deploymentKey, oldHash, out)
if err != nil {
return err
}
}
if oldName == newRc.Name {
return cmdutil.UsageError(cmd, "%s cannot have the same name as the existing ReplicationController %s",
filename, oldName)
}
updater := kubectl.NewRollingUpdater(newRc.Namespace, updaterClient)
// To successfully pull off a rolling update the new and old rc have to differ
// by at least one selector. Every new pod should have the selector and every
// old pod should not have the selector.
var hasLabel bool
for key, oldValue := range oldRc.Spec.Selector {
if newValue, ok := newRc.Spec.Selector[key]; ok && newValue != oldValue {
hasLabel = true
break
}
}
if !hasLabel {
return cmdutil.UsageError(cmd, "%s must specify a matching key with non-equal value in Selector for %s",
filename, oldName)
}
// TODO: handle scales during rolling update
if replicasDefaulted {
newRc.Spec.Replicas = oldRc.Spec.Replicas
}
if dryrun {
oldRcData := &bytes.Buffer{}
if err := f.PrintObject(cmd, oldRc, oldRcData); err != nil {
return err
}
newRcData := &bytes.Buffer{}
if err := f.PrintObject(cmd, newRc, newRcData); err != nil {
return err
}
fmt.Fprintf(out, "Rolling from:\n%s\nTo:\n%s\n", string(oldRcData.Bytes()), string(newRcData.Bytes()))
return nil
}
updateCleanupPolicy := kubectl.DeleteRollingUpdateCleanupPolicy
if keepOldName {
updateCleanupPolicy = kubectl.RenameRollingUpdateCleanupPolicy
}
config := &kubectl.RollingUpdaterConfig{
Out: out,
OldRc: oldRc,
NewRc: newRc,
UpdatePeriod: period,
Interval: interval,
Timeout: timeout,
CleanupPolicy: updateCleanupPolicy,
UpdateAcceptor: kubectl.DefaultUpdateAcceptor,
}
if cmdutil.GetFlagBool(cmd, "rollback") {
kubectl.AbortRollingUpdate(config)
client.ReplicationControllers(config.NewRc.Namespace).Update(config.NewRc)
}
err = updater.Update(config)
if err != nil {
return err
}
if keepOldName {
fmt.Fprintf(out, "%s\n", oldName)
} else {
fmt.Fprintf(out, "%s\n", newRc.Name)
}
return nil
}