// Get returns an api.RangeAllocation that represents the current state in
// etcd. If the key does not exist, the object will have an empty ResourceVersion.
func (e *Etcd) Get() (*api.RangeAllocation, error) {
existing := &api.RangeAllocation{}
if err := e.helper.ExtractObj(e.baseKey, existing, true); err != nil {
return nil, etcderr.InterpretGetError(err, e.kind, "")
}
return existing, nil
}
// assignPod assigns the given pod to the given machine.
func (r *BindingREST) assignPod(ctx api.Context, podID string, machine string, annotations map[string]string) (err error) {
if _, err = r.setPodHostAndAnnotations(ctx, podID, "", machine, annotations); err != nil {
err = etcderr.InterpretGetError(err, "pod", podID)
err = etcderr.InterpretUpdateError(err, "pod", podID)
if _, ok := err.(*errors.StatusError); !ok {
err = errors.NewConflict("binding", podID, err)
}
}
return
}
// GetService obtains a Service specified by its name.
func (r *Registry) GetService(ctx api.Context, name string) (*api.Service, error) {
key, err := makeServiceKey(ctx, name)
if err != nil {
return nil, err
}
var svc api.Service
err = r.ExtractObj(key, &svc, false)
if err != nil {
return nil, etcderr.InterpretGetError(err, "service", name)
}
return &svc, nil
}
// GetController gets a specific ReplicationController specified by its ID.
func (r *Registry) GetController(ctx api.Context, controllerID string) (*api.ReplicationController, error) {
var controller api.ReplicationController
key, err := makeControllerKey(ctx, controllerID)
if err != nil {
return nil, err
}
err = r.ExtractObj(key, &controller, false)
if err != nil {
return nil, etcderr.InterpretGetError(err, "replicationController", controllerID)
}
return &controller, nil
}
// Refresh reloads the RangeAllocation from etcd.
func (e *Etcd) Refresh() (*api.RangeAllocation, error) {
e.lock.Lock()
defer e.lock.Unlock()
existing := &api.RangeAllocation{}
if err := e.helper.ExtractObj(e.baseKey, existing, false); err != nil {
if tools.IsEtcdNotFound(err) {
return nil, nil
}
return nil, etcderr.InterpretGetError(err, e.kind, "")
}
return existing, nil
}
// Ensure that when scheduler creates a binding for a pod that has already been deleted
// by the API server, API server returns not-found error.
func TestEtcdCreateBindingNoPod(t *testing.T) {
registry, bindingRegistry, _, fakeClient, _ := newStorage(t)
ctx := api.NewDefaultContext()
fakeClient.TestIndex = true
key, _ := registry.KeyFunc(ctx, "foo")
key = etcdtest.AddPrefix(key)
fakeClient.Data[key] = tools.EtcdResponseWithError{
R: &etcd.Response{
Node: nil,
},
E: tools.EtcdErrorNotFound,
}
// Assume that a pod has undergone the following:
// - Create (apiserver)
// - Schedule (scheduler)
// - Delete (apiserver)
_, err := bindingRegistry.Create(ctx, &api.Binding{
ObjectMeta: api.ObjectMeta{Namespace: api.NamespaceDefault, Name: "foo"},
Target: api.ObjectReference{Name: "machine"},
})
if err == nil {
t.Fatalf("Expected not-found-error but got nothing")
}
if !errors.IsNotFound(etcderrors.InterpretGetError(err, "Pod", "foo")) {
t.Fatalf("Unexpected error returned: %#v", err)
}
_, err = registry.Get(ctx, "foo")
if err == nil {
t.Fatalf("Expected not-found-error but got nothing")
}
if !errors.IsNotFound(etcderrors.InterpretGetError(err, "Pod", "foo")) {
t.Fatalf("Unexpected error: %v", err)
}
}
// Get retrieves the item from etcd.
func (e *Etcd) Get(ctx api.Context, name string) (runtime.Object, error) {
obj := e.NewFunc()
trace := util.NewTrace("Get " + reflect.TypeOf(obj).String())
defer trace.LogIfLong(time.Second)
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
trace.Step("About to read object")
if err := e.Helper.ExtractObj(key, obj, false); err != nil {
return nil, etcderr.InterpretGetError(err, e.EndpointName, name)
}
trace.Step("Object read")
if e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
return nil, err
}
}
return obj, nil
}