func TestControllerError(t *testing.T) {
testCases := map[string]struct {
err func() error
errFn func(err error) bool
reactFn testclient.ReactionFunc
actions int
}{
"not found": {
err: func() error { return errors.NewNotFound("namespace", "test") },
errFn: func(err error) bool { return err == nil },
actions: 1,
},
"unknown": {
err: func() error { return fmt.Errorf("unknown") },
errFn: func(err error) bool { return err.Error() == "unknown" },
actions: 1,
},
"conflict": {
actions: 4,
reactFn: func(a testclient.FakeAction) (runtime.Object, error) {
if a.Action == "get-namespace" {
return &kapi.Namespace{ObjectMeta: kapi.ObjectMeta{Name: "test"}}, nil
}
return (*kapi.Namespace)(nil), errors.NewConflict("namespace", "test", fmt.Errorf("test conflict"))
},
errFn: func(err error) bool {
return err != nil && strings.Contains(err.Error(), "unable to allocate security info")
},
},
}
for s, testCase := range testCases {
client := &testclient.Fake{ReactFn: testCase.reactFn}
if client.ReactFn == nil {
client.ReactFn = func(a testclient.FakeAction) (runtime.Object, error) {
return (*kapi.Namespace)(nil), testCase.err()
}
}
uidr, _ := uid.NewRange(10, 19, 2)
mcsr, _ := mcs.NewRange("s0:", 10, 2)
uida := uidallocator.NewInMemory(uidr)
c := Allocation{
uid: uida,
mcs: DefaultMCSAllocation(uidr, mcsr, 5),
client: client.Namespaces(),
}
err := c.Next(&kapi.Namespace{ObjectMeta: kapi.ObjectMeta{Name: "test"}})
if !testCase.errFn(err) {
t.Errorf("%s: unexpected error: %v", s, err)
}
if len(client.Actions) != testCase.actions {
t.Errorf("%s: expected %d actions: %v", s, testCase.actions, client.Actions)
}
if uida.Free() != 5 {
t.Errorf("%s: should not have allocated uid: %d/%d", s, uida.Free(), uidr.Size())
}
}
}
func TestController(t *testing.T) {
var action testclient.FakeAction
client := &testclient.Fake{
ReactFn: func(a testclient.FakeAction) (runtime.Object, error) {
action = a
return (*kapi.Namespace)(nil), nil
},
}
uidr, _ := uid.NewRange(10, 20, 2)
mcsr, _ := mcs.NewRange("s0:", 10, 2)
uida := uidallocator.NewInMemory(uidr)
c := Allocation{
uid: uida,
mcs: DefaultMCSAllocation(uidr, mcsr, 5),
client: client.Namespaces(),
}
err := c.Next(&kapi.Namespace{ObjectMeta: kapi.ObjectMeta{Name: "test"}})
if err != nil {
t.Fatal(err)
}
got := action.Value.(*kapi.Namespace)
if got.Annotations[security.UIDRangeAnnotation] != "10/2" {
t.Errorf("unexpected annotation: %#v", got)
}
if got.Annotations[security.MCSAnnotation] != "s0:c1,c0" {
t.Errorf("unexpected annotation: %#v", got)
}
if !uida.Has(uid.Block{Start: 10, End: 11}) {
t.Errorf("did not allocate uid: %#v", uida)
}
}
// RunOnce verifies the state of allocations and returns an error if an unrecoverable problem occurs.
func (c *Repair) RunOnce() error {
// TODO: (per smarterclayton) if Get() or List() is a weak consistency read,
// or if they are executed against different leaders,
// the ordering guarantee required to ensure no item is allocated twice is violated.
// List must return a ResourceVersion higher than the etcd index Get,
// and the release code must not release items that have allocated but not yet been created
// See #8295
latest, err := c.alloc.Get()
if err != nil {
return fmt.Errorf("unable to refresh the security allocation UID blocks: %v", err)
}
list, err := c.client.List(labels.Everything(), fields.Everything())
if err != nil {
return fmt.Errorf("unable to refresh the security allocation UID blocks: %v", err)
}
uids := uidallocator.NewInMemory(c.uidRange)
for _, ns := range list.Items {
value, ok := ns.Annotations[security.UIDRangeAnnotation]
if !ok {
continue
}
block, err := uid.ParseBlock(value)
if err != nil {
continue
}
switch err := uids.Allocate(block); err {
case nil:
case uidallocator.ErrFull:
// TODO: send event
return fmt.Errorf("the UID range %s is full; you must widen the range in order to allocate more UIDs", c.uidRange)
default:
return fmt.Errorf("unable to allocate UID block %s for namespace %s due to an unknown error, exiting: %v", block, ns.Name, err)
}
}
err = uids.Snapshot(latest)
if err != nil {
return fmt.Errorf("unable to persist the updated namespace UID allocations: %v", err)
}
if err := c.alloc.CreateOrUpdate(latest); err != nil {
return fmt.Errorf("unable to persist the updated namespace UID allocations: %v", err)
}
return nil
}