// ScaleRC scales the given rc to the given replicas.
func ScaleRC(name, ns string, replicas int, restClient *client.Client) (*api.ReplicationController, error) {
scaler, err := kubectl.ScalerFor("ReplicationController", restClient)
if err != nil {
return nil, err
}
retry := &kubectl.RetryParams{Interval: 50 * time.Millisecond, Timeout: DefaultTimeout}
waitForReplicas := &kubectl.RetryParams{Interval: 50 * time.Millisecond, Timeout: DefaultTimeout}
err = scaler.Scale(ns, name, uint(replicas), nil, retry, waitForReplicas)
if err != nil {
return nil, err
}
scaled, err := restClient.ReplicationControllers(ns).Get(name)
if err != nil {
return nil, err
}
return scaled, nil
}
// NewFactory creates a factory with the default Kubernetes resources defined
// if optionalClientConfig is nil, then flags will be bound to a new clientcmd.ClientConfig.
// if optionalClientConfig is not nil, then this factory will make use of it.
func NewFactory(optionalClientConfig clientcmd.ClientConfig) *Factory {
mapper := kubectl.ShortcutExpander{RESTMapper: api.RESTMapper}
flags := pflag.NewFlagSet("", pflag.ContinueOnError)
flags.SetNormalizeFunc(util.WarnWordSepNormalizeFunc) // Warn for "_" flags
generators := map[string]kubectl.Generator{
"run/v1": kubectl.BasicReplicationController{},
"run-pod/v1": kubectl.BasicPod{},
"service/v1": kubectl.ServiceGeneratorV1{},
"service/v2": kubectl.ServiceGeneratorV2{},
"horizontalpodautoscaler/v1beta1": kubectl.HorizontalPodAutoscalerV1Beta1{},
}
clientConfig := optionalClientConfig
if optionalClientConfig == nil {
clientConfig = DefaultClientConfig(flags)
}
clients := NewClientCache(clientConfig)
return &Factory{
clients: clients,
flags: flags,
generators: generators,
Object: func() (meta.RESTMapper, runtime.ObjectTyper) {
cfg, err := clientConfig.ClientConfig()
CheckErr(err)
cmdApiVersion := cfg.Version
return kubectl.OutputVersionMapper{RESTMapper: mapper, OutputVersion: cmdApiVersion}, api.Scheme
},
Client: func() (*client.Client, error) {
return clients.ClientForVersion("")
},
ClientConfig: func() (*client.Config, error) {
return clients.ClientConfigForVersion("")
},
RESTClient: func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
group, err := api.RESTMapper.GroupForResource(mapping.Resource)
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
switch group {
case "":
return client.RESTClient, nil
case "extensions":
return client.ExtensionsClient.RESTClient, nil
}
return nil, fmt.Errorf("unable to get RESTClient for resource '%s'", mapping.Resource)
},
Describer: func(mapping *meta.RESTMapping) (kubectl.Describer, error) {
group, err := api.RESTMapper.GroupForResource(mapping.Resource)
if err != nil {
return nil, err
}
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
if describer, ok := kubectl.DescriberFor(group, mapping.Kind, client); ok {
return describer, nil
}
return nil, fmt.Errorf("no description has been implemented for %q", mapping.Kind)
},
Printer: func(mapping *meta.RESTMapping, noHeaders, withNamespace bool, wide bool, showAll bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
return kubectl.NewHumanReadablePrinter(noHeaders, withNamespace, wide, showAll, columnLabels), nil
},
PodSelectorForObject: func(object runtime.Object) (string, error) {
// TODO: replace with a swagger schema based approach (identify pod selector via schema introspection)
switch t := object.(type) {
case *api.ReplicationController:
return kubectl.MakeLabels(t.Spec.Selector), nil
case *api.Pod:
if len(t.Labels) == 0 {
return "", fmt.Errorf("the pod has no labels and cannot be exposed")
}
return kubectl.MakeLabels(t.Labels), nil
case *api.Service:
if t.Spec.Selector == nil {
return "", fmt.Errorf("the service has no pod selector set")
}
return kubectl.MakeLabels(t.Spec.Selector), nil
default:
_, kind, err := api.Scheme.ObjectVersionAndKind(object)
if err != nil {
return "", err
}
return "", fmt.Errorf("cannot extract pod selector from %s", kind)
}
},
PortsForObject: func(object runtime.Object) ([]string, error) {
// TODO: replace with a swagger schema based approach (identify pod selector via schema introspection)
switch t := object.(type) {
case *api.ReplicationController:
return getPorts(t.Spec.Template.Spec), nil
case *api.Pod:
return getPorts(t.Spec), nil
case *api.Service:
return getServicePorts(t.Spec), nil
default:
_, kind, err := api.Scheme.ObjectVersionAndKind(object)
if err != nil {
return nil, err
}
return nil, fmt.Errorf("cannot extract ports from %s", kind)
}
},
LabelsForObject: func(object runtime.Object) (map[string]string, error) {
return meta.NewAccessor().Labels(object)
},
Scaler: func(mapping *meta.RESTMapping) (kubectl.Scaler, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
return kubectl.ScalerFor(mapping.Kind, client)
},
Reaper: func(mapping *meta.RESTMapping) (kubectl.Reaper, error) {
client, err := clients.ClientForVersion(mapping.APIVersion)
if err != nil {
return nil, err
}
return kubectl.ReaperFor(mapping.Kind, client)
},
Validator: func(validate bool, cacheDir string) (validation.Schema, error) {
if validate {
client, err := clients.ClientForVersion("")
if err != nil {
return nil, err
}
dir := cacheDir
if len(dir) > 0 {
version, err := client.ServerVersion()
if err != nil {
return nil, err
}
dir = path.Join(cacheDir, version.String())
}
return &clientSwaggerSchema{
c: client,
cacheDir: dir,
mapper: api.RESTMapper,
}, nil
}
return validation.NullSchema{}, nil
},
DefaultNamespace: func() (string, bool, error) {
return clientConfig.Namespace()
},
Generator: func(name string) (kubectl.Generator, bool) {
generator, ok := generators[name]
return generator, ok
},
CanBeExposed: func(kind string) error {
if kind != "ReplicationController" && kind != "Service" && kind != "Pod" {
return fmt.Errorf("invalid resource provided: %v, only a replication controller, service or pod is accepted", kind)
}
return nil
},
CanBeAutoscaled: func(kind string) error { // TODO: support autoscale for deployments
if kind != "ReplicationController" {
return fmt.Errorf("invalid resource provided: %v, only a replication controller is accepted", kind)
}
return nil
},
}
}
})
It("should scale a job up", func() {
startParallelism := 1
endParallelism := 2
By("Creating a job")
job := newTestJob("notTerminate", "scale-up", api.RestartPolicyNever, startParallelism, completions)
job, err := createJob(f.Client, f.Namespace.Name, job)
Expect(err).NotTo(HaveOccurred())
By("Ensuring active pods == startParallelism")
err = waitForAllPodsRunning(f.Client, f.Namespace.Name, job.Name, startParallelism)
Expect(err).NotTo(HaveOccurred())
By("scale job up")
scaler, err := kubectl.ScalerFor("Job", f.Client)
Expect(err).NotTo(HaveOccurred())
waitForScale := kubectl.NewRetryParams(5*time.Second, 1*time.Minute)
waitForReplicas := kubectl.NewRetryParams(5*time.Second, 5*time.Minute)
scaler.Scale(f.Namespace.Name, job.Name, uint(endParallelism), nil, waitForScale, waitForReplicas)
Expect(err).NotTo(HaveOccurred())
By("Ensuring active pods == endParallelism")
err = waitForAllPodsRunning(f.Client, f.Namespace.Name, job.Name, endParallelism)
Expect(err).NotTo(HaveOccurred())
})
It("should scale a job down", func() {
startParallelism := 2
endParallelism := 1
By("Creating a job")