From 3ec2062821635a9c015c5ad52ea08b37d3638d46 Mon Sep 17 00:00:00 2001 From: Joel Speed Date: Wed, 6 May 2020 16:47:56 +0100 Subject: [PATCH] UPSTREAM: 3125: openshift: Rewrite DeleteNodesTwice test to check API not TargetSize --- .../clusterapi/clusterapi_nodegroup_test.go | 142 ++++++++++++------ 1 file changed, 95 insertions(+), 47 deletions(-) diff --git a/cluster-autoscaler/cloudprovider/clusterapi/clusterapi_nodegroup_test.go b/cluster-autoscaler/cloudprovider/clusterapi/clusterapi_nodegroup_test.go index 007720480d87..108857ef87e8 100644 --- a/cluster-autoscaler/cloudprovider/clusterapi/clusterapi_nodegroup_test.go +++ b/cluster-autoscaler/cloudprovider/clusterapi/clusterapi_nodegroup_test.go @@ -25,8 +25,10 @@ import ( "testing" "time" + corev1 "k8s.io/api/core/v1" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" v1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/apimachinery/pkg/util/wait" "k8s.io/autoscaler/cluster-autoscaler/cloudprovider" "k8s.io/utils/pointer" ) @@ -867,16 +869,29 @@ func TestNodeGroupMachineSetDeleteNodesWithMismatchedNodes(t *testing.T) { } func TestNodeGroupDeleteNodesTwice(t *testing.T) { - addDeletionTimestamp := func(t *testing.T, controller *machineController, machine *Machine) error { + addDeletionTimestampToMachine := func(t *testing.T, controller *machineController, node *corev1.Node) error { + m, err := controller.findMachineByProviderID(normalizedProviderString(node.Spec.ProviderID)) + if err != nil { + return err + } + // Simulate delete that would have happened if the // Machine API controllers were running Don't actually // delete since the fake client does not support // finalizers. now := v1.Now() - machine.DeletionTimestamp = &now - return controller.machineInformer.Informer().GetStore().Update(newUnstructuredFromMachine(machine)) + m.DeletionTimestamp = &now + if _, err := controller.dynamicclient.Resource(*controller.machineResource).Namespace(m.GetNamespace()).Update(context.Background(), newUnstructuredFromMachine(m), v1.UpdateOptions{}); err != nil { + return err + } + + return nil } + // This is the size we expect the NodeGroup to be after we have called DeleteNodes. + // We need at least 8 nodes for this test to be valid. + expectedSize := 7 + test := func(t *testing.T, testConfig *testConfig) { controller, stop := mustCreateTestController(t, testConfig) defer stop() @@ -896,6 +911,17 @@ func TestNodeGroupDeleteNodesTwice(t *testing.T) { t.Fatalf("unexpected error: %v", err) } + // Check that the test case is valid before executing DeleteNodes + // 1. We must have at least 1 more node than the expected size otherwise DeleteNodes is a no-op + // 2. MinSize must be less than the expected size otherwise a second call to DeleteNodes may + // not make the nodegroup size less than the expected size. + if len(nodeNames) <= expectedSize { + t.Fatalf("expected more nodes than the expected size: %d <= %d", len(nodeNames), expectedSize) + } + if ng.MinSize() >= expectedSize { + t.Fatalf("expected min size to be less than expected size: %d >= %d", ng.MinSize(), expectedSize) + } + if len(nodeNames) != len(testConfig.nodes) { t.Fatalf("expected len=%v, got len=%v", len(testConfig.nodes), len(nodeNames)) } @@ -910,55 +936,41 @@ func TestNodeGroupDeleteNodesTwice(t *testing.T) { } } + // These are the nodes which are over the final expectedSize + nodesToBeDeleted := testConfig.nodes[expectedSize:] + // Assert that we have no DeletionTimestamp - for i := 7; i < len(testConfig.machines); i++ { + for i := expectedSize; i < len(testConfig.machines); i++ { if !testConfig.machines[i].ObjectMeta.DeletionTimestamp.IsZero() { t.Fatalf("unexpected DeletionTimestamp") } } - if err := ng.DeleteNodes(testConfig.nodes[7:]); err != nil { + // Delete all nodes over the expectedSize + if err := ng.DeleteNodes(nodesToBeDeleted); err != nil { t.Fatalf("unexpected error: %v", err) } - for i := 7; i < len(testConfig.machines); i++ { - if err := addDeletionTimestamp(t, controller, testConfig.machines[i]); err != nil { + for _, node := range nodesToBeDeleted { + if err := addDeletionTimestampToMachine(t, controller, node); err != nil { t.Fatalf("unexpected err: %v", err) } - if testConfig.machines[i].ObjectMeta.DeletionTimestamp.IsZero() { - t.Fatalf("expected a DeletionTimestamp") - } } - // TODO(frobware) We have a flaky test here because we - // just called Delete and Update and the next call to - // controller.nodeGroups() will sometimes get stale - // objects from the (fakeclient) store. To fix this we - // should update the test machinery so that individual - // tests can have callbacks on Add/Update/Delete on - // each of the respective informers. We should then - // override those callbacks here in this test to add - // rendezvous points so that we wait until all objects - // have been updated before we go and get them again. - // - // Running this test with a 500ms duration I see: - // - // $ ./stress ./openshiftmachineapi.test -test.run TestNodeGroupDeleteNodesTwice -test.count 5 | ts | ts -i - // 00:00:05 Feb 27 14:29:36 0 runs so far, 0 failures - // 00:00:05 Feb 27 14:29:41 8 runs so far, 0 failures - // 00:00:05 Feb 27 14:29:46 16 runs so far, 0 failures - // 00:00:05 Feb 27 14:29:51 24 runs so far, 0 failures - // 00:00:05 Feb 27 14:29:56 32 runs so far, 0 failures - // ... - // 00:00:05 Feb 27 14:31:01 112 runs so far, 0 failures - // 00:00:05 Feb 27 14:31:06 120 runs so far, 0 failures - // 00:00:05 Feb 27 14:31:11 128 runs so far, 0 failures - // 00:00:05 Feb 27 14:31:16 136 runs so far, 0 failures - // 00:00:05 Feb 27 14:31:21 144 runs so far, 0 failures - // - // To make sure we don't run into any flakes in CI - // I've chosen to make this sleep duration 3s. - time.Sleep(3 * time.Second) + // Wait for the machineset to have been updated + if err := wait.PollImmediate(100*time.Millisecond, 5*time.Second, func() (bool, error) { + nodegroups, err = controller.nodeGroups() + if err != nil { + return false, err + } + targetSize, err := nodegroups[0].TargetSize() + if err != nil { + return false, err + } + return targetSize == expectedSize, nil + }); err != nil { + t.Fatalf("unexpected error waiting for nodegroup to be expected size: %v", err) + } nodegroups, err = controller.nodeGroups() if err != nil { @@ -967,22 +979,58 @@ func TestNodeGroupDeleteNodesTwice(t *testing.T) { ng = nodegroups[0] - // Attempt to delete the nodes again which verifies - // that nodegroup.DeleteNodes() skips over nodes that - // have a non-nil DeletionTimestamp value. - if err := ng.DeleteNodes(testConfig.nodes[7:]); err != nil { - t.Fatalf("unexpected error: %v", err) - } - + // Check the nodegroup is at the expected size actualSize, err := ng.TargetSize() if err != nil { t.Fatalf("unexpected error: %v", err) } - expectedSize := len(testConfig.machines) - len(testConfig.machines[7:]) if actualSize != expectedSize { t.Fatalf("expected %d nodes, got %d", expectedSize, actualSize) } + + // Check that the machines deleted in the last run have DeletionTimestamp's + // when fetched from the API + for _, node := range nodesToBeDeleted { + // Ensure the update has propogated + if err := wait.PollImmediate(100*time.Millisecond, 5*time.Second, func() (bool, error) { + m, err := controller.findMachineByProviderID(normalizedProviderString(node.Spec.ProviderID)) + if err != nil { + return false, err + } + return !m.GetDeletionTimestamp().IsZero(), nil + }); err != nil { + t.Fatalf("unexpected error waiting for machine to have deletion timestamp: %v", err) + } + } + + // Attempt to delete the nodes again which verifies + // that nodegroup.DeleteNodes() skips over nodes that + // have a non-nil DeletionTimestamp value. + if err := ng.DeleteNodes(nodesToBeDeleted); err != nil { + t.Fatalf("unexpected error: %v", err) + } + + switch v := (ng.scalableResource).(type) { + case *machineSetScalableResource: + updatedMachineSet, err := controller.getMachineSet(testConfig.machineSet.Namespace, testConfig.machineSet.Name, metav1.GetOptions{}) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if actual := pointer.Int32PtrDerefOr(updatedMachineSet.Spec.Replicas, 0); int(actual) != expectedSize { + t.Fatalf("expected %v nodes, got %v", expectedSize, actual) + } + case *machineDeploymentScalableResource: + updatedMachineDeployment, err := controller.getMachineDeployment(testConfig.machineDeployment.Namespace, testConfig.machineDeployment.Name, metav1.GetOptions{}) + if err != nil { + t.Fatalf("unexpected error: %v", err) + } + if actual := pointer.Int32PtrDerefOr(updatedMachineDeployment.Spec.Replicas, 0); int(actual) != expectedSize { + t.Fatalf("expected %v nodes, got %v", expectedSize, actual) + } + default: + t.Errorf("unexpected type: %T", v) + } } // Note: 10 is an upper bound for the number of nodes/replicas