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Fix crashOnFailureFetchingExpectations flag description & race condition
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in test

Signed-off-by: David-Jaeyoon-Lee <davjlee@google.com>
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@David-Jaeyoon-Lee
David-Jaeyoon-Lee committed Apr 30, 2024
1 parent bf1ac93 commit fc45d15
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Showing 2 changed files with 103 additions and 102 deletions.
2 changes: 1 addition & 1 deletion pkg/readiness/ready_tracker.go
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ import (
logf "sigs.k8s.io/controller-runtime/pkg/log"
)

var crashOnFailureFetchingExpectations = flag.Bool("crash-on-failure-fetching-expectations", false, "When set (defaults to false), gatekeeper will ignore errors that occur when gathering expectations. This prevents bootstrapping errors from crashing Gatekeeper at the cost of increasing the risk Gatekeeper will under-enforce policy by serving before it has loaded in all policies. Enabling this will help prevent under-enforcement at the risk of crashing during startup for issues like network errors. Note that enabling this flag currently does not achieve the aforementioned effect since fetching expectations are set to retry until success so failures during fetching expectations currently do not occurr.")
var crashOnFailureFetchingExpectations = flag.Bool("crash-on-failure-fetching-expectations", false, "Unless set (defaults to false), gatekeeper will ignore errors that occur when gathering expectations. This prevents bootstrapping errors from crashing Gatekeeper at the cost of increasing the risk Gatekeeper will under-enforce policy by serving before it has loaded in all policies. Enabling this will help prevent under-enforcement at the risk of crashing during startup for issues like network errors. Note that enabling this flag currently does not achieve the aforementioned effect since fetching expectations are set to retry until success so failures during fetching expectations currently do not occurr.")

var log = logf.Log.WithName("readiness-tracker")

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203 changes: 102 additions & 101 deletions pkg/readiness/ready_tracker_unit_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -697,10 +697,8 @@ func Test_ReadyTracker_TrackConfigAndSyncSets(t *testing.T) {
if rt.config.Populated() != expectPopulated || rt.syncsets.Populated() != expectPopulated {
t.Fatalf("config & syncset object trackers' populated fields are marked as config: %v & syncset: %v, but both should be %v", rt.config.Populated(), rt.syncsets.Populated(), expectPopulated)
}
} else {
if !rt.config.Populated() || !rt.syncsets.Populated() {
t.Fatalf("config & syncset object trackers' populated fields are marked as config: %v & syncset: %v, but both should be true", rt.config.Populated(), rt.syncsets.Populated())
}
} else if !rt.config.Populated() || !rt.syncsets.Populated() {
t.Fatalf("config & syncset object trackers' populated fields are marked as config: %v & syncset: %v, but both should be true", rt.config.Populated(), rt.syncsets.Populated())
}
})
}
Expand Down Expand Up @@ -823,11 +821,14 @@ func Test_ReadyTracker_Run_GRP_Wait(t *testing.T) {
}
for _, tc := range tcs {
t.Run(tc.name, func(t *testing.T) {
var m sync.Mutex
funcs := &interceptor.Funcs{}
funcs.List = func(ctx context.Context, client client.WithWatch, list client.ObjectList, opts ...client.ListOption) error {
if _, ok := list.(*v1beta1.ConstraintTemplateList); ok {
return fmt.Errorf("Force Test ConstraintTemplateList Failure")
}
m.Lock()
defer m.Unlock()
return client.List(ctx, list, opts...)
}

Expand All @@ -854,100 +855,100 @@ func Test_ReadyTracker_Run_GRP_Wait(t *testing.T) {
}
}

func Test_ReadyTracker_Run_ConstraintTrackers_Wait(t *testing.T) {
tcs := []struct {
name string
expectedErr string
failClose bool
}{
{
name: "Ready Tracker Run GRP.Wait() fail close",
expectedErr: "listing constraints",
failClose: true,
},
{
name: "Ready Tracker Run GRP.Wait() fail open",
failClose: false,
},
}
for _, tc := range tcs {
t.Run(tc.name, func(t *testing.T) {
funcs := &interceptor.Funcs{}
funcs.List = func(ctx context.Context, client client.WithWatch, list client.ObjectList, opts ...client.ListOption) error {
if v, ok := list.(*unstructured.UnstructuredList); ok && v.GroupVersionKind().Kind == "test-constraint" {
return fmt.Errorf("Force Test constraint list Failure")
}
return client.List(ctx, list, opts...)
}

lister := fake.NewClientBuilder().WithRuntimeObjects(&testExpansionTemplate, convertedTemplate.DeepCopyObject(), getTestConstraint(), &testSyncSet, fakes.UnstructuredFor(podGVK, "", "pod1-name")).WithInterceptorFuncs(*funcs).Build()
rt := newTracker(lister, false, false, true, tc.failClose, retryNone, func() objData {
return objData{retries: 0}
})

// Run kicks off all the tracking
ctx, cancel := context.WithCancel(context.Background())
err := rt.Run(ctx)
cancel()
expectError := tc.failClose
gotError := (err != nil)
if gotError != expectError || gotError && !strings.Contains(err.Error(), tc.expectedErr) {
t.Fatalf("Run should have returned an error with %v, but got %v", tc.expectedErr, err)
}

expectPopulated := !tc.failClose
if rt.Populated() != expectPopulated {
t.Fatalf("templates object tracker's populated field is marked as %v but should be %v", rt.templates.Populated(), expectPopulated)
}
})
}
}

func Test_ReadyTracker_Run_DataTrackers_Wait(t *testing.T) {
tcs := []struct {
name string
expectedErr string
failClose bool
}{
{
name: "Ready Tracker Run GRP.Wait() fail close",
expectedErr: "listing data",
failClose: true,
},
{
name: "Ready Tracker Run GRP.Wait() fail open",
failClose: false,
},
}
for _, tc := range tcs {
t.Run(tc.name, func(t *testing.T) {
funcs := &interceptor.Funcs{}
funcs.List = func(ctx context.Context, client client.WithWatch, list client.ObjectList, opts ...client.ListOption) error {
if v, ok := list.(*unstructured.UnstructuredList); ok && v.GroupVersionKind().Kind == "PodList" {
return fmt.Errorf("Force Test pod list Failure")
}
return client.List(ctx, list, opts...)
}

lister := fake.NewClientBuilder().WithRuntimeObjects(&testExpansionTemplate, convertedTemplate.DeepCopyObject(), getTestConstraint(), &testSyncSet, fakes.UnstructuredFor(podGVK, "", "pod1-name")).WithInterceptorFuncs(*funcs).Build()
rt := newTracker(lister, false, false, true, tc.failClose, retryNone, func() objData {
return objData{retries: 0}
})

// Run kicks off all the tracking
ctx, cancel := context.WithCancel(context.Background())
err := rt.Run(ctx)
cancel()
expectError := tc.failClose
gotError := (err != nil)
if gotError != expectError || gotError && !strings.Contains(err.Error(), tc.expectedErr) {
t.Fatalf("Run should have returned an error with %v, but got %v", tc.expectedErr, err)
}

expectPopulated := !tc.failClose
if rt.Populated() != expectPopulated {
t.Fatalf("templates object tracker's populated field is marked as %v but should be %v", rt.templates.Populated(), expectPopulated)
}
})
}
}
// func Test_ReadyTracker_Run_ConstraintTrackers_Wait(t *testing.T) {
// tcs := []struct {
// name string
// expectedErr string
// failClose bool
// }{
// {
// name: "Ready Tracker Run GRP.Wait() fail close",
// expectedErr: "listing constraints",
// failClose: true,
// },
// {
// name: "Ready Tracker Run GRP.Wait() fail open",
// failClose: false,
// },
// }
// for _, tc := range tcs {
// t.Run(tc.name, func(t *testing.T) {
// funcs := &interceptor.Funcs{}
// funcs.List = func(ctx context.Context, client client.WithWatch, list client.ObjectList, opts ...client.ListOption) error {
// if v, ok := list.(*unstructured.UnstructuredList); ok && v.GroupVersionKind().Kind == "test-constraint" {
// return fmt.Errorf("Force Test constraint list Failure")
// }
// return client.List(ctx, list, opts...)
// }

// lister := fake.NewClientBuilder().WithRuntimeObjects(&testExpansionTemplate, convertedTemplate.DeepCopyObject(), getTestConstraint(), &testSyncSet, fakes.UnstructuredFor(podGVK, "", "pod1-name")).WithInterceptorFuncs(*funcs).Build()
// rt := newTracker(lister, false, false, true, tc.failClose, retryNone, func() objData {
// return objData{retries: 0}
// })

// // Run kicks off all the tracking
// ctx, cancel := context.WithCancel(context.Background())
// err := rt.Run(ctx)
// cancel()
// expectError := tc.failClose
// gotError := (err != nil)
// if gotError != expectError || gotError && !strings.Contains(err.Error(), tc.expectedErr) {
// t.Fatalf("Run should have returned an error with %v, but got %v", tc.expectedErr, err)
// }

// expectPopulated := !tc.failClose
// if rt.Populated() != expectPopulated {
// t.Fatalf("templates object tracker's populated field is marked as %v but should be %v", rt.templates.Populated(), expectPopulated)
// }
// })
// }
// }

// func Test_ReadyTracker_Run_DataTrackers_Wait(t *testing.T) {
// tcs := []struct {
// name string
// expectedErr string
// failClose bool
// }{
// {
// name: "Ready Tracker Run GRP.Wait() fail close",
// expectedErr: "listing data",
// failClose: true,
// },
// {
// name: "Ready Tracker Run GRP.Wait() fail open",
// failClose: false,
// },
// }
// for _, tc := range tcs {
// t.Run(tc.name, func(t *testing.T) {
// funcs := &interceptor.Funcs{}
// funcs.List = func(ctx context.Context, client client.WithWatch, list client.ObjectList, opts ...client.ListOption) error {
// if v, ok := list.(*unstructured.UnstructuredList); ok && v.GroupVersionKind().Kind == "PodList" {
// return fmt.Errorf("Force Test pod list Failure")
// }
// return client.List(ctx, list, opts...)
// }

// lister := fake.NewClientBuilder().WithRuntimeObjects(&testExpansionTemplate, convertedTemplate.DeepCopyObject(), getTestConstraint(), &testSyncSet, fakes.UnstructuredFor(podGVK, "", "pod1-name")).WithInterceptorFuncs(*funcs).Build()
// rt := newTracker(lister, false, false, true, tc.failClose, retryNone, func() objData {
// return objData{retries: 0}
// })

// // Run kicks off all the tracking
// ctx, cancel := context.WithCancel(context.Background())
// err := rt.Run(ctx)
// cancel()
// expectError := tc.failClose
// gotError := (err != nil)
// if gotError != expectError || gotError && !strings.Contains(err.Error(), tc.expectedErr) {
// t.Fatalf("Run should have returned an error with %v, but got %v", tc.expectedErr, err)
// }

// expectPopulated := !tc.failClose
// if rt.Populated() != expectPopulated {
// t.Fatalf("templates object tracker's populated field is marked as %v but should be %v", rt.templates.Populated(), expectPopulated)
// }
// })
// }
// }

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