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Merge pull request #116770 from alexzielenski/agg-discovery-err-sources

Browse Source 
Fix aggregated discovery race when using CRD and Aggregated APIService under same group
This commit is contained in:
Kubernetes Prow Robot 2023-03-21 15:18:12 -07:00 committed by GitHub
commit 8dd3807f4d
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 661 additions and 54 deletions
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7
staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/apiserver.go
View File

@ -43,6 +43,7 @@ import (
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apimachinery/pkg/version"
"k8s.io/apiserver/pkg/endpoints/discovery"
"k8s.io/apiserver/pkg/endpoints/discovery/aggregated"
"k8s.io/apiserver/pkg/features"
genericregistry "k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/registry/rest"
@ -210,7 +211,11 @@ func (c completedConfig) New(delegationTarget genericapiserver.DelegationTarget)
s.GenericAPIServer.Handler.NonGoRestfulMux.HandlePrefix("/apis/", crdHandler)
s.GenericAPIServer.RegisterDestroyFunc(crdHandler.destroy)
discoveryController := NewDiscoveryController(s.Informers.Apiextensions().V1().CustomResourceDefinitions(), versionDiscoveryHandler, groupDiscoveryHandler, genericServer.AggregatedDiscoveryGroupManager)
aggregatedDiscoveryManager := genericServer.AggregatedDiscoveryGroupManager
if aggregatedDiscoveryManager != nil {
aggregatedDiscoveryManager = aggregatedDiscoveryManager.WithSource(aggregated.CRDSource)
}
discoveryController := NewDiscoveryController(s.Informers.Apiextensions().V1().CustomResourceDefinitions(), versionDiscoveryHandler, groupDiscoveryHandler, aggregatedDiscoveryManager)
namingController := status.NewNamingConditionController(s.Informers.Apiextensions().V1().CustomResourceDefinitions(), crdClient.ApiextensionsV1())
nonStructuralSchemaController := nonstructuralschema.NewConditionController(s.Informers.Apiextensions().V1().CustomResourceDefinitions(), crdClient.ApiextensionsV1())
apiApprovalController := apiapproval.NewKubernetesAPIApprovalPolicyConformantConditionController(s.Informers.Apiextensions().V1().CustomResourceDefinitions(), crdClient.ApiextensionsV1())

1
staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/customresource_discovery_controller.go
View File

@ -265,6 +265,7 @@ func (c *DiscoveryController) sync(version schema.GroupVersion) error {
})
if c.resourceManager != nil {
c.resourceManager.AddGroupVersion(version.Group, apidiscoveryv2beta1.APIVersionDiscovery{
Freshness: apidiscoveryv2beta1.DiscoveryFreshnessCurrent,
Version: version.Version,
Resources: aggregatedApiResourcesForDiscovery,
})

6
staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/customresource_discovery_controller_test.go
View File

@ -126,7 +126,8 @@ var coolBarCRD = &v1.CustomResourceDefinition{
}
var coolFooDiscovery apidiscoveryv2beta1.APIVersionDiscovery = apidiscoveryv2beta1.APIVersionDiscovery{
Version: "v1",
Version: "v1",
Freshness: apidiscoveryv2beta1.DiscoveryFreshnessCurrent,
Resources: []apidiscoveryv2beta1.APIResourceDiscovery{
{
Resource: "coolfoos",
@ -157,7 +158,8 @@ var coolFooDiscovery apidiscoveryv2beta1.APIVersionDiscovery = apidiscoveryv2bet
}
var mergedDiscovery apidiscoveryv2beta1.APIVersionDiscovery = apidiscoveryv2beta1.APIVersionDiscovery{
Version: "v1",
Version: "v1",
Freshness: apidiscoveryv2beta1.DiscoveryFreshnessCurrent,
Resources: []apidiscoveryv2beta1.APIResourceDiscovery{
{
Resource: "coolbars",

4
staging/src/k8s.io/apiserver/pkg/endpoints/discovery/aggregated/fake.go
View File

@ -169,3 +169,7 @@ func (f *recorderResourceManager) WebService() *restful.WebService {
func (f *recorderResourceManager) ServeHTTP(http.ResponseWriter, *http.Request) {
panic("unimplemented")
}
func (f *recorderResourceManager) WithSource(source Source) ResourceManager {
panic("unimplemented")
}

208
staging/src/k8s.io/apiserver/pkg/endpoints/discovery/aggregated/handler.go
View File

@ -36,6 +36,15 @@ import (
"k8s.io/klog/v2"
)
type Source uint
// The GroupVersion from the lowest Source takes precedence
const (
AggregatorSource Source = 0
BuiltinSource Source = 100
CRDSource Source = 200
)
// This handler serves the /apis endpoint for an aggregated list of
// api resources indexed by their group version.
type ResourceManager interface {
@ -65,9 +74,55 @@ type ResourceManager interface {
// Thread-Safe
SetGroups([]apidiscoveryv2beta1.APIGroupDiscovery)
// Returns the same resource manager using a different source
// The source is used to decide how to de-duplicate groups.
// The group from the least-numbered source is used
WithSource(source Source) ResourceManager
http.Handler
}
type resourceManager struct {
source Source
*resourceDiscoveryManager
}
func (rm resourceManager) AddGroupVersion(groupName string, value apidiscoveryv2beta1.APIVersionDiscovery) {
rm.resourceDiscoveryManager.AddGroupVersion(rm.source, groupName, value)
}
func (rm resourceManager) SetGroupVersionPriority(gv metav1.GroupVersion, grouppriority, versionpriority int) {
rm.resourceDiscoveryManager.SetGroupVersionPriority(rm.source, gv, grouppriority, versionpriority)
}
func (rm resourceManager) RemoveGroup(groupName string) {
rm.resourceDiscoveryManager.RemoveGroup(rm.source, groupName)
}
func (rm resourceManager) RemoveGroupVersion(gv metav1.GroupVersion) {
rm.resourceDiscoveryManager.RemoveGroupVersion(rm.source, gv)
}
func (rm resourceManager) SetGroups(groups []apidiscoveryv2beta1.APIGroupDiscovery) {
rm.resourceDiscoveryManager.SetGroups(rm.source, groups)
}
func (rm resourceManager) WithSource(source Source) ResourceManager {
return resourceManager{
source: source,
resourceDiscoveryManager: rm.resourceDiscoveryManager,
}
}
type groupKey struct {
name string
// Source identifies where this group came from and dictates which group
// among duplicates is chosen to be used for discovery.
source Source
}
type groupVersionKey struct {
metav1.GroupVersion
source Source
}
type resourceDiscoveryManager struct {
serializer runtime.NegotiatedSerializer
// cache is an atomic pointer to avoid the use of locks
@ -78,8 +133,8 @@ type resourceDiscoveryManager struct {
// Writes protected by the lock.
// List of all apigroups & resources indexed by the resource manager
lock sync.RWMutex
apiGroups map[string]*apidiscoveryv2beta1.APIGroupDiscovery
versionPriorities map[metav1.GroupVersion]priorityInfo
apiGroups map[groupKey]*apidiscoveryv2beta1.APIGroupDiscovery
versionPriorities map[groupVersionKey]priorityInfo
}
type priorityInfo struct {
@ -93,7 +148,7 @@ func NewResourceManager(path string) ResourceManager {
utilruntime.Must(apidiscoveryv2beta1.AddToScheme(scheme))
rdm := &resourceDiscoveryManager{
serializer: codecs,
versionPriorities: make(map[metav1.GroupVersion]priorityInfo),
versionPriorities: make(map[groupVersionKey]priorityInfo),
}
rdm.serveHTTPFunc = metrics.InstrumentHandlerFunc("GET",
/* group = */ "",
@ -105,20 +160,28 @@ func NewResourceManager(path string) ResourceManager {
/* deprecated */ false,
/* removedRelease */ "",
rdm.serveHTTP)
return rdm
return resourceManager{
source: BuiltinSource,
resourceDiscoveryManager: rdm,
}
}
func (rdm *resourceDiscoveryManager) SetGroupVersionPriority(gv metav1.GroupVersion, groupPriorityMinimum, versionPriority int) {
func (rdm *resourceDiscoveryManager) SetGroupVersionPriority(source Source, gv metav1.GroupVersion, groupPriorityMinimum, versionPriority int) {
rdm.lock.Lock()
defer rdm.lock.Unlock()
rdm.versionPriorities[gv] = priorityInfo{
key := groupVersionKey{
GroupVersion: gv,
source: source,
}
rdm.versionPriorities[key] = priorityInfo{
GroupPriorityMinimum: groupPriorityMinimum,
VersionPriority: versionPriority,
}
rdm.cache.Store(nil)
}
func (rdm *resourceDiscoveryManager) SetGroups(groups []apidiscoveryv2beta1.APIGroupDiscovery) {
func (rdm *resourceDiscoveryManager) SetGroups(source Source, groups []apidiscoveryv2beta1.APIGroupDiscovery) {
rdm.lock.Lock()
defer rdm.lock.Unlock()
@ -127,13 +190,17 @@ func (rdm *resourceDiscoveryManager) SetGroups(groups []apidiscoveryv2beta1.APIG
for _, group := range groups {
for _, version := range group.Versions {
rdm.addGroupVersionLocked(group.Name, version)
rdm.addGroupVersionLocked(source, group.Name, version)
}
}
// Filter unused out priority entries
for gv := range rdm.versionPriorities {
entry, exists := rdm.apiGroups[gv.Group]
key := groupKey{
source: source,
name: gv.Group,
}
entry, exists := rdm.apiGroups[key]
if !exists {
delete(rdm.versionPriorities, gv)
continue
@ -154,21 +221,26 @@ func (rdm *resourceDiscoveryManager) SetGroups(groups []apidiscoveryv2beta1.APIG
}
}
func (rdm *resourceDiscoveryManager) AddGroupVersion(groupName string, value apidiscoveryv2beta1.APIVersionDiscovery) {
func (rdm *resourceDiscoveryManager) AddGroupVersion(source Source, groupName string, value apidiscoveryv2beta1.APIVersionDiscovery) {
rdm.lock.Lock()
defer rdm.lock.Unlock()
rdm.addGroupVersionLocked(groupName, value)
rdm.addGroupVersionLocked(source, groupName, value)
}
func (rdm *resourceDiscoveryManager) addGroupVersionLocked(groupName string, value apidiscoveryv2beta1.APIVersionDiscovery) {
func (rdm *resourceDiscoveryManager) addGroupVersionLocked(source Source, groupName string, value apidiscoveryv2beta1.APIVersionDiscovery) {
klog.Infof("Adding GroupVersion %s %s to ResourceManager", groupName, value.Version)
if rdm.apiGroups == nil {
rdm.apiGroups = make(map[string]*apidiscoveryv2beta1.APIGroupDiscovery)
rdm.apiGroups = make(map[groupKey]*apidiscoveryv2beta1.APIGroupDiscovery)
}
if existing, groupExists := rdm.apiGroups[groupName]; groupExists {
key := groupKey{
source: source,
name: groupName,
}
if existing, groupExists := rdm.apiGroups[key]; groupExists {
// If this version already exists, replace it
versionExists := false
@ -181,6 +253,7 @@ func (rdm *resourceDiscoveryManager) addGroupVersionLocked(groupName string, val
if reflect.DeepEqual(existing.Versions[i], value) {
return
}
existing.Versions[i] = value
versionExists = true
break
@ -198,12 +271,16 @@ func (rdm *resourceDiscoveryManager) addGroupVersionLocked(groupName string, val
},
Versions: []apidiscoveryv2beta1.APIVersionDiscovery{value},
}
rdm.apiGroups[groupName] = group
rdm.apiGroups[key] = group
}
gv := metav1.GroupVersion{Group: groupName, Version: value.Version}
if _, ok := rdm.versionPriorities[gv]; !ok {
rdm.versionPriorities[gv] = priorityInfo{
gvKey := groupVersionKey{
GroupVersion: gv,
source: source,
}
if _, ok := rdm.versionPriorities[gvKey]; !ok {
rdm.versionPriorities[gvKey] = priorityInfo{
GroupPriorityMinimum: 1000,
VersionPriority: 15,
}
@ -213,10 +290,16 @@ func (rdm *resourceDiscoveryManager) addGroupVersionLocked(groupName string, val
rdm.cache.Store(nil)
}
func (rdm *resourceDiscoveryManager) RemoveGroupVersion(apiGroup metav1.GroupVersion) {
func (rdm *resourceDiscoveryManager) RemoveGroupVersion(source Source, apiGroup metav1.GroupVersion) {
rdm.lock.Lock()
defer rdm.lock.Unlock()
group, exists := rdm.apiGroups[apiGroup.Group]
key := groupKey{
source: source,
name: apiGroup.Group,
}
group, exists := rdm.apiGroups[key]
if !exists {
return
}
@ -234,23 +317,33 @@ func (rdm *resourceDiscoveryManager) RemoveGroupVersion(apiGroup metav1.GroupVer
return
}
delete(rdm.versionPriorities, apiGroup)
gvKey := groupVersionKey{
GroupVersion: apiGroup,
source: source,
}
delete(rdm.versionPriorities, gvKey)
if len(group.Versions) == 0 {
delete(rdm.apiGroups, group.Name)
delete(rdm.apiGroups, key)
}
// Reset response document so it is recreated lazily
rdm.cache.Store(nil)
}
func (rdm *resourceDiscoveryManager) RemoveGroup(groupName string) {
func (rdm *resourceDiscoveryManager) RemoveGroup(source Source, groupName string) {
rdm.lock.Lock()
defer rdm.lock.Unlock()
delete(rdm.apiGroups, groupName)
key := groupKey{
source: source,
name: groupName,
}
delete(rdm.apiGroups, key)
for k := range rdm.versionPriorities {
if k.Group == groupName {
if k.Group == groupName && k.source == source {
delete(rdm.versionPriorities, k)
}
}
@ -265,17 +358,63 @@ func (rdm *resourceDiscoveryManager) calculateAPIGroupsLocked() []apidiscoveryv2
regenerationCounter.Inc()
// Re-order the apiGroups by their priority.
groups := []apidiscoveryv2beta1.APIGroupDiscovery{}
for _, group := range rdm.apiGroups {
copied := *group.DeepCopy()
groupsToUse := map[string]apidiscoveryv2beta1.APIGroupDiscovery{}
sourcesUsed := map[metav1.GroupVersion]Source{}
for key, group := range rdm.apiGroups {
if existing, ok := groupsToUse[key.name]; ok {
for _, v := range group.Versions {
gv := metav1.GroupVersion{Group: key.name, Version: v.Version}
// Skip groupversions we've already seen before. Only DefaultSource
// takes precedence
if usedSource, seen := sourcesUsed[gv]; seen && key.source >= usedSource {
continue
} else if seen {
// Find the index of the duplicate version and replace
for i := 0; i < len(existing.Versions); i++ {
if existing.Versions[i].Version == v.Version {
existing.Versions[i] = v
break
}
}
} else {
// New group-version, just append
existing.Versions = append(existing.Versions, v)
}
sourcesUsed[gv] = key.source
groupsToUse[key.name] = existing
}
// Check to see if we have overlapping versions. If we do, take the one
// with highest source precedence
} else {
groupsToUse[key.name] = *group.DeepCopy()
for _, v := range group.Versions {
gv := metav1.GroupVersion{Group: key.name, Version: v.Version}
sourcesUsed[gv] = key.source
}
}
}
for _, group := range groupsToUse {
// Re-order versions based on their priority. Use kube-aware string
// comparison as a tie breaker
sort.SliceStable(copied.Versions, func(i, j int) bool {
iVersion := copied.Versions[i].Version
jVersion := copied.Versions[j].Version
sort.SliceStable(group.Versions, func(i, j int) bool {
iVersion := group.Versions[i].Version
jVersion := group.Versions[j].Version
iPriority := rdm.versionPriorities[metav1.GroupVersion{Group: group.Name, Version: iVersion}].VersionPriority
jPriority := rdm.versionPriorities[metav1.GroupVersion{Group: group.Name, Version: jVersion}].VersionPriority
iGV := metav1.GroupVersion{Group: group.Name, Version: iVersion}
jGV := metav1.GroupVersion{Group: group.Name, Version: jVersion}
iSource := sourcesUsed[iGV]
jSource := sourcesUsed[jGV]
iPriority := rdm.versionPriorities[groupVersionKey{iGV, iSource}].VersionPriority
jPriority := rdm.versionPriorities[groupVersionKey{jGV, jSource}].VersionPriority
// Sort by version string comparator if priority is equal
if iPriority == jPriority {
@ -286,13 +425,16 @@ func (rdm *resourceDiscoveryManager) calculateAPIGroupsLocked() []apidiscoveryv2
return iPriority > jPriority
})
groups = append(groups, *copied.DeepCopy())
groups = append(groups, group)
}
// For each group, determine the highest minimum group priority and use that
priorities := map[string]int{}
for gv, info := range rdm.versionPriorities {
if source := sourcesUsed[gv.GroupVersion]; source != gv.source {
continue
}
if existing, exists := priorities[gv.Group]; exists {
if existing < info.GroupPriorityMinimum {
priorities[gv.Group] = info.GroupPriorityMinimum

86
staging/src/k8s.io/apiserver/pkg/endpoints/discovery/aggregated/handler_test.go
View File

@ -18,6 +18,7 @@ package aggregated_test
import (
"encoding/json"
"fmt"
"math/rand"
"net/http"
"net/http/httptest"
@ -365,6 +366,91 @@ func TestUpdateService(t *testing.T) {
assert.NotEqual(t, secondDocument, initialDocument, "should have returned expected document")
}
func TestMultipleSources(t *testing.T) {
type pair struct {
manager discoveryendpoint.ResourceManager
apis apidiscoveryv2beta1.APIGroupDiscoveryList
}
pairs := []pair{}
defaultManager := discoveryendpoint.NewResourceManager("apis")
for i := 0; i < 10; i++ {
name := discoveryendpoint.Source(100 * i)
manager := defaultManager.WithSource(name)
apis := fuzzAPIGroups(1, 3, int64(15+i))
// Give the groups deterministic names
for i := range apis.Items {
apis.Items[i].Name = fmt.Sprintf("%v.%v.com", i, name)
}
pairs = append(pairs, pair{manager, apis})
}
expectedResult := []apidiscoveryv2beta1.APIGroupDiscovery{}
groupCounter := 0
for _, p := range pairs {
for gi, g := range p.apis.Items {
for vi, v := range g.Versions {
p.manager.AddGroupVersion(g.Name, v)
// Use index for priority so we dont have to do any sorting
// Use negative index since it is sorted descending
p.manager.SetGroupVersionPriority(metav1.GroupVersion{Group: g.Name, Version: v.Version}, -gi-groupCounter, -vi)
}
expectedResult = append(expectedResult, g)
}
groupCounter += len(p.apis.Items)
}
// Show discovery document is what we expect
_, _, initialDocument := fetchPath(defaultManager, "application/json", discoveryPath, "")
require.Len(t, initialDocument.Items, len(expectedResult))
require.Equal(t, initialDocument.Items, expectedResult)
}
// Shows that if you have multiple sources including Default source using
// with the same group name the groups added by the "Default" source are used
func TestSourcePrecedence(t *testing.T) {
defaultManager := discoveryendpoint.NewResourceManager("apis")
otherManager := defaultManager.WithSource(500)
apis := fuzzAPIGroups(1, 3, int64(15))
for _, g := range apis.Items {
for i, v := range g.Versions {
v.Freshness = apidiscoveryv2beta1.DiscoveryFreshnessCurrent
g.Versions[i] = v
otherManager.AddGroupVersion(g.Name, v)
}
}
_, _, initialDocument := fetchPath(defaultManager, "application/json", discoveryPath, "")
require.Equal(t, apis.Items, initialDocument.Items)
// Add the first groupversion under default.
// No versions should appear in discovery document except this one
overrideVersion := initialDocument.Items[0].Versions[0]
overrideVersion.Freshness = apidiscoveryv2beta1.DiscoveryFreshnessStale
defaultManager.AddGroupVersion(initialDocument.Items[0].Name, overrideVersion)
_, _, maskedDocument := fetchPath(defaultManager, "application/json", discoveryPath, "")
masked := initialDocument.DeepCopy()
masked.Items[0].Versions[0].Freshness = apidiscoveryv2beta1.DiscoveryFreshnessStale
require.Equal(t, masked.Items, maskedDocument.Items)
// Wipe out default group. The other versions from the other group should now
// appear since the group is not being overridden by defaults ource
defaultManager.RemoveGroup(apis.Items[0].Name)
_, _, resetDocument := fetchPath(defaultManager, "application/json", discoveryPath, "")
require.Equal(t, resetDocument.Items, initialDocument.Items)
}
// Show the discovery manager is capable of serving requests to multiple users
// with unchanging data
func TestConcurrentRequests(t *testing.T) {

2
staging/src/k8s.io/apiserver/pkg/server/genericapiserver.go
View File

@ -776,6 +776,7 @@ func (s *GenericAPIServer) installAPIResources(apiPrefix string, apiGroupInfo *A
s.AggregatedDiscoveryGroupManager.AddGroupVersion(
groupVersion.Group,
apidiscoveryv2beta1.APIVersionDiscovery{
Freshness: apidiscoveryv2beta1.DiscoveryFreshnessCurrent,
Version: groupVersion.Version,
Resources: discoveryAPIResources,
},
@ -785,6 +786,7 @@ func (s *GenericAPIServer) installAPIResources(apiPrefix string, apiGroupInfo *A
s.AggregatedLegacyDiscoveryGroupManager.AddGroupVersion(
groupVersion.Group,
apidiscoveryv2beta1.APIVersionDiscovery{
Freshness: apidiscoveryv2beta1.DiscoveryFreshnessCurrent,
Version: groupVersion.Version,
Resources: discoveryAPIResources,
},

4
staging/src/k8s.io/kube-aggregator/pkg/apiserver/apiserver.go
View File

@ -397,7 +397,9 @@ func (s *APIAggregator) PrepareRun() (preparedAPIAggregator, error) {
if utilfeature.DefaultFeatureGate.Enabled(genericfeatures.AggregatedDiscoveryEndpoint) {
s.discoveryAggregationController = NewDiscoveryManager(
s.GenericAPIServer.AggregatedDiscoveryGroupManager,
// Use aggregator as the source name to avoid overwriting native/CRD
// groups
s.GenericAPIServer.AggregatedDiscoveryGroupManager.WithSource(aggregated.AggregatorSource),
)
// Setup discovery endpoint

2
staging/src/k8s.io/kube-aggregator/pkg/apiserver/handler_discovery.go
View File

@ -421,7 +421,7 @@ func (dm *discoveryManager) Run(stopCh <-chan struct{}) {
}
// Ensure that apiregistration.k8s.io is the first group in the discovery group.
dm.mergedDiscoveryHandler.SetGroupVersionPriority(APIRegistrationGroupVersion, APIRegistrationGroupPriority, 0)
dm.mergedDiscoveryHandler.WithSource(discoveryendpoint.BuiltinSource).SetGroupVersionPriority(APIRegistrationGroupVersion, APIRegistrationGroupPriority, 0)
wait.PollUntil(1*time.Minute, func() (done bool, err error) {
dm.servicesLock.Lock()

171
test/integration/apiserver/discovery/discovery_test.go
View File

@ -255,13 +255,16 @@ func runTestCases(t *testing.T, cases []testCase) {
for _, c := range cases {
t.Run(c.Name, func(t *testing.T) {
func() {
for _, a := range c.Actions {
testContext, testDone := context.WithCancel(ctx)
defer testDone()
for i, a := range c.Actions {
if cleaning, ok := a.(cleaningAction); ok {
defer func() {
require.NoError(t, cleaning.Cleanup(ctx, client))
require.NoError(t, cleaning.Cleanup(testContext, client), "cleanup after \"%T\" step %v", a, i)
}()
}
require.NoError(t, a.Do(ctx, client))
require.NoError(t, a.Do(testContext, client), "running \"%T\" step %v", a, i)
}
}()
@ -339,9 +342,10 @@ func TestCRD(t *testing.T) {
applyCRD(makeCRDSpec(stableGroup, "Bar", false, []string{"v1", "v2"})),
// only CRD has stable v2, this will show that CRD has been synced
waitForGroupVersionsV1([]metav1.GroupVersion{stableV2}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV2}),
// Show that we have v1 and v2 but v1 is stale
waitForGroupVersionsV1([]metav1.GroupVersion{stableV1, stableV2}),
waitForStaleGroupVersionsV2([]metav1.GroupVersion{stableV1}),
waitForFreshGroupVersionsV2([]metav1.GroupVersion{stableV2}),
// Delete APIService shared by the aggregated apiservice and
// CRD
@ -355,7 +359,160 @@ func TestCRD(t *testing.T) {
// Show that the groupversion is re-added back
waitForGroupVersionsV1([]metav1.GroupVersion{stableV1, stableV2, stableV1alpha1}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV1, stableV2, stableV1alpha1}),
waitForFreshGroupVersionsV2([]metav1.GroupVersion{stableV1, stableV2, stableV1alpha1}),
},
},
{
// Show that if CRD and Aggregated APIservice share a groupversiom,
// The aggregated apiservice's discovery information is shown in both
// v1 and v2 discovery
Name: "CRDAPIServiceSameGroupDifferentVersions",
Actions: []testAction{
// Wait for CRD to apply
applyCRD(makeCRDSpec(stableGroup, "Bar", false, []string{"v2", "v1alpha1"})),
// Wait for GV to appear in both discovery documents
waitForGroupVersionsV1([]metav1.GroupVersion{stableV2, stableV1alpha1}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV2, stableV1alpha1}),
applyAPIService(
apiregistrationv1.APIServiceSpec{
Group: stableGroup,
Version: "v1",
InsecureSkipTLSVerify: true,
GroupPriorityMinimum: int32(1000),
VersionPriority: int32(100),
Service: &apiregistrationv1.ServiceReference{
Name: "unused",
Namespace: "default",
},
},
),
// We should now have stable v1 available
waitForGroupVersionsV1([]metav1.GroupVersion{stableV1}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV1}),
// The CRD group-versions not served by the aggregated
// apiservice should still be availablee
waitForGroupVersionsV1([]metav1.GroupVersion{stableV2, stableV1alpha1}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV2, stableV1alpha1}),
// Remove API service. Show we have switched to CRD
deleteObject{
GroupVersionResource: metav1.GroupVersionResource(apiregistrationv1.SchemeGroupVersion.WithResource("apiservices")),
Name: "v1.stable.example.com",
},
// Show that we still have stable v1 since it is in the CRD
waitForGroupVersionsV1([]metav1.GroupVersion{stableV2, stableV1alpha1}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV2, stableV1alpha1}),
waitForAbsentGroupVersionsV1([]metav1.GroupVersion{stableV1}),
waitForAbsentGroupVersionsV2([]metav1.GroupVersion{stableV1}),
},
},
{
// Show that if CRD and a builtin share a group version,
// the builtin takes precedence in both versions of discovery
Name: "CRDBuiltinOverlapPrecence",
Actions: []testAction{
// Create CRD that overrides a builtin
applyCRD(makeCRDSpec("apiextensions.k8s.io", "Bar", true, []string{"v1", "v2", "vfake"})),
waitForGroupVersionsV1([]metav1.GroupVersion{{Group: "apiextensions.k8s.io", Version: "vfake"}}),
waitForGroupVersionsV2([]metav1.GroupVersion{{Group: "apiextensions.k8s.io", Version: "vfake"}}),
// Show that the builtin group-version is still used for V1
// By showing presence of v1.CustomResourceDefinition
// and absence of v1.Bar
waitForResourcesV1([]metav1.GroupVersionResource{
{
Group: "apiextensions.k8s.io",
Version: "v1",
Resource: "customresourcedefinitions",
},
{
Group: "apiextensions.k8s.io",
Version: "vfake",
Resource: "bars",
},
}),
waitForResourcesV2([]metav1.GroupVersionResource{
{
Group: "apiextensions.k8s.io",
Version: "v1",
Resource: "customresourcedefinitions",
},
{
Group: "apiextensions.k8s.io",
Version: "vfake",
Resource: "bars",
},
}),
waitForResourcesAbsentV1([]metav1.GroupVersionResource{
{
Group: "apiextensions.k8s.io",
Version: "v1",
Resource: "bars",
},
}),
waitForResourcesAbsentV2([]metav1.GroupVersionResource{
{
Group: "apiextensions.k8s.io",
Version: "v1",
Resource: "bars",
},
}),
},
},
{
// Tests that a race discovered during alpha phase of the feature is fixed.
// Rare race would occur if a CRD was synced before the removal of an aggregated
// APIService could be synced.
// To test this we:
// 1. Add CRD to apiserver
// 2. Wait for it to sync
// 3. Add aggregated APIService with same groupversion
// 4. Remove aggregated apiservice
// 5. Check that we have CRD GVs in discovery document
// Show that if CRD and APIService share a groupversion, and the
// APIService is deleted, and CRD updated, the groupversion from
// the CRD remains in discovery.
Name: "Race",
Actions: []testAction{
// Create CRD with the same GV as the aggregated APIService
applyCRD(makeCRDSpec(stableGroup, "Bar", false, []string{"v1", "v2"})),
// only CRD has stable v2, this will show that CRD has been synced
waitForGroupVersionsV1([]metav1.GroupVersion{stableV1, stableV2}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV1, stableV2}),
// Add Aggregated APIService that overlaps the CRD.
applyAPIService(
apiregistrationv1.APIServiceSpec{
Group: stableGroup,
Version: "v1",
InsecureSkipTLSVerify: true,
GroupPriorityMinimum: int32(1000),
VersionPriority: int32(100),
Service: &apiregistrationv1.ServiceReference{
Name: "fake",
Namespace: "default",
},
},
),
// Delete APIService shared by the aggregated apiservice and
// CRD
deleteObject{
GroupVersionResource: metav1.GroupVersionResource(apiregistrationv1.SchemeGroupVersion.WithResource("apiservices")),
Name: "v1.stable.example.com",
},
// Show the CRD (with stablev2) is the one which is now advertised
waitForGroupVersionsV1([]metav1.GroupVersion{stableV1, stableV2}),
waitForGroupVersionsV2([]metav1.GroupVersion{stableV1, stableV2}),
},
},
})

224
test/integration/apiserver/discovery/framework.go
View File

@ -21,6 +21,7 @@ import (
"encoding/json"
"fmt"
"reflect"
"strings"
"time"
apiextensions "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
@ -42,6 +43,8 @@ import (
const acceptV1JSON = "application/json"
const acceptV2JSON = "application/json;g=apidiscovery.k8s.io;v=v2beta1;as=APIGroupDiscoveryList"
const maxTimeout = 10 * time.Second
type testClient interface {
kubernetes.Interface
aggregator.Interface
@ -91,6 +94,15 @@ type waitForGroupVersionsV2 []metav1.GroupVersion
// Wait for groupversions to disappear from v2 discovery
type waitForAbsentGroupVersionsV2 []metav1.GroupVersion
type waitForStaleGroupVersionsV2 []metav1.GroupVersion
type waitForFreshGroupVersionsV2 []metav1.GroupVersion
type waitForResourcesV1 []metav1.GroupVersionResource
type waitForResourcesAbsentV1 []metav1.GroupVersionResource
type waitForResourcesV2 []metav1.GroupVersionResource
type waitForResourcesAbsentV2 []metav1.GroupVersionResource
// Assert something about the current state of v2 discovery
type inlineAction func(ctx context.Context, client testClient) error
@ -133,7 +145,7 @@ func (a applyAPIService) Cleanup(ctx context.Context, client testClient) error {
err = wait.PollWithContext(
ctx,
250*time.Millisecond,
1*time.Second,
maxTimeout,
func(ctx context.Context) (done bool, err error) {
_, err = client.ApiregistrationV1().APIServices().Get(ctx, name, metav1.GetOptions{})
if err == nil {
@ -165,6 +177,13 @@ func (a applyCRD) Do(ctx context.Context, client testClient) error {
Spec: apiextensionsv1.CustomResourceDefinitionSpec(a),
}
if strings.HasSuffix(obj.Name, ".k8s.io") {
if obj.Annotations == nil {
obj.Annotations = map[string]string{}
}
obj.Annotations["api-approved.kubernetes.io"] = "https://github.com/kubernetes/kubernetes/fake"
}
unstructuredContent, err := runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
if err != nil {
return err
@ -194,7 +213,7 @@ func (a applyCRD) Cleanup(ctx context.Context, client testClient) error {
err = wait.PollWithContext(
ctx,
250*time.Millisecond,
1*time.Second,
maxTimeout,
func(ctx context.Context) (done bool, err error) {
_, err = client.ApiextensionsV1().CustomResourceDefinitions().Get(ctx, name, metav1.GetOptions{})
if err == nil {
@ -226,6 +245,40 @@ func (d deleteObject) Do(ctx context.Context, client testClient) error {
}
}
func (w waitForStaleGroupVersionsV2) Do(ctx context.Context, client testClient) error {
err := WaitForResultWithCondition(ctx, client, func(result apidiscoveryv2beta1.APIGroupDiscoveryList) bool {
for _, gv := range w {
if info := FindGroupVersionV2(result, gv); info == nil || info.Freshness != apidiscoveryv2beta1.DiscoveryFreshnessStale {
return false
}
}
return true
})
if err != nil {
return fmt.Errorf("waiting for stale groupversions v2 (%v): %w", w, err)
}
return nil
}
func (w waitForFreshGroupVersionsV2) Do(ctx context.Context, client testClient) error {
err := WaitForResultWithCondition(ctx, client, func(result apidiscoveryv2beta1.APIGroupDiscoveryList) bool {
for _, gv := range w {
if info := FindGroupVersionV2(result, gv); info == nil || info.Freshness != apidiscoveryv2beta1.DiscoveryFreshnessCurrent {
return false
}
}
return true
})
if err != nil {
return fmt.Errorf("waiting for fresh groupversions v2 (%v): %w", w, err)
}
return nil
}
func (w waitForGroupVersionsV2) Do(ctx context.Context, client testClient) error {
err := WaitForResultWithCondition(ctx, client, func(result apidiscoveryv2beta1.APIGroupDiscoveryList) bool {
for _, gv := range w {
@ -294,6 +347,137 @@ func (w waitForAbsentGroupVersionsV1) Do(ctx context.Context, client testClient)
return nil
}
func (w waitForResourcesV1) Do(ctx context.Context, client testClient) error {
requiredResources := map[metav1.GroupVersion][]string{}
for _, gvr := range w {
gv := metav1.GroupVersion{Group: gvr.Group, Version: gvr.Version}
if existing, ok := requiredResources[gv]; ok {
requiredResources[gv] = append(existing, gvr.Resource)
} else {
requiredResources[gv] = []string{gvr.Resource}
}
}
for gv, resourceNames := range requiredResources {
err := WaitForV1ResourcesWithCondition(ctx, client, gv, func(result metav1.APIResourceList) bool {
for _, name := range resourceNames {
found := false
for _, resultResource := range result.APIResources {
if resultResource.Name == name {
found = true
break
}
}
if !found {
return false
}
}
return true
})
if err != nil {
if errors.IsNotFound(err) {
return nil
}
return fmt.Errorf("waiting for resources v1 (%v): %w", w, err)
}
}
return nil
}
func (w waitForResourcesAbsentV1) Do(ctx context.Context, client testClient) error {
requiredResources := map[metav1.GroupVersion][]string{}
for _, gvr := range w {
gv := metav1.GroupVersion{Group: gvr.Group, Version: gvr.Version}
if existing, ok := requiredResources[gv]; ok {
requiredResources[gv] = append(existing, gvr.Resource)
} else {
requiredResources[gv] = []string{gvr.Resource}
}
}
for gv, resourceNames := range requiredResources {
err := WaitForV1ResourcesWithCondition(ctx, client, gv, func(result metav1.APIResourceList) bool {
for _, name := range resourceNames {
for _, resultResource := range result.APIResources {
if resultResource.Name == name {
return false
}
}
}
return true
})
if err != nil {
if errors.IsNotFound(err) {
return nil
}
return fmt.Errorf("waiting for absent resources v1 (%v): %w", w, err)
}
}
return nil
}
func (w waitForResourcesV2) Do(ctx context.Context, client testClient) error {
err := WaitForResultWithCondition(ctx, client, func(result apidiscoveryv2beta1.APIGroupDiscoveryList) bool {
for _, gvr := range w {
if info := FindGroupVersionV2(result, metav1.GroupVersion{Group: gvr.Group, Version: gvr.Version}); info == nil {
return false
} else {
found := false
for _, resultResoure := range info.Resources {
if resultResoure.Resource == gvr.Resource {
found = true
break
}
}
if !found {
return false
}
}
}
return true
})
if err != nil {
return fmt.Errorf("waiting for resources v2 (%v): %w", w, err)
}
return nil
}
func (w waitForResourcesAbsentV2) Do(ctx context.Context, client testClient) error {
err := WaitForResultWithCondition(ctx, client, func(result apidiscoveryv2beta1.APIGroupDiscoveryList) bool {
for _, gvr := range w {
if info := FindGroupVersionV2(result, metav1.GroupVersion{Group: gvr.Group, Version: gvr.Version}); info == nil {
return false
} else {
for _, resultResoure := range info.Resources {
if resultResoure.Resource == gvr.Resource {
return false
}
}
}
}
return true
})
if err != nil {
return fmt.Errorf("waiting for absent resources v2 (%v): %w", w, err)
}
return nil
}
func (i inlineAction) Do(ctx context.Context, client testClient) error {
return i(ctx, client)
}
@ -334,7 +518,7 @@ func FetchV1DiscoveryGroupsAtPath(ctx context.Context, client testClient, path s
Discovery().
RESTClient().
Get().
AbsPath("/apis").
AbsPath(path).
SetHeader("Accept", acceptV1JSON).
Do(ctx).
Raw()
@ -352,7 +536,7 @@ func FetchV1DiscoveryGroupsAtPath(ctx context.Context, client testClient, path s
return groupList, nil
}
func FetchV1DiscoveryResource(ctx context.Context, client testClient, gv metav1.GroupVersion) (metav1.APIGroupList, error) {
func FetchV1DiscoveryResource(ctx context.Context, client testClient, gv metav1.GroupVersion) (metav1.APIResourceList, error) {
result, err := client.
Discovery().
RESTClient().
@ -363,13 +547,13 @@ func FetchV1DiscoveryResource(ctx context.Context, client testClient, gv metav1.
Raw()
if err != nil {
return metav1.APIGroupList{}, err
return metav1.APIResourceList{}, err
}
groupList := metav1.APIGroupList{}
groupList := metav1.APIResourceList{}
err = json.Unmarshal(result, &groupList)
if err != nil {
return metav1.APIGroupList{}, err
return metav1.APIResourceList{}, err
}
return groupList, nil
@ -408,7 +592,7 @@ func WaitForResultWithCondition(ctx context.Context, client testClient, conditio
return wait.PollWithContext(
ctx,
250*time.Millisecond,
1*time.Second,
maxTimeout,
func(ctx context.Context) (done bool, err error) {
groupList, err := FetchV2Discovery(ctx, client)
if err != nil {
@ -429,7 +613,7 @@ func WaitForV1GroupsWithCondition(ctx context.Context, client testClient, condit
return wait.PollWithContext(
ctx,
250*time.Millisecond,
1*time.Second,
maxTimeout,
func(ctx context.Context) (done bool, err error) {
groupList, err := FetchV1DiscoveryGroups(ctx, client)
@ -445,6 +629,28 @@ func WaitForV1GroupsWithCondition(ctx context.Context, client testClient, condit
})
}
func WaitForV1ResourcesWithCondition(ctx context.Context, client testClient, gv metav1.GroupVersion, condition func(result metav1.APIResourceList) bool) error {
// Keep repeatedly fetching document from aggregator.
// Check to see if it contains our service within a reasonable amount of time
return wait.PollWithContext(
ctx,
250*time.Millisecond,
maxTimeout,
func(ctx context.Context) (done bool, err error) {
resourceList, err := FetchV1DiscoveryResource(ctx, client, gv)
if err != nil {
return false, err
}
if condition(resourceList) {
return true, nil
}
return false, nil
})
}
func FindGroupVersionV1(discovery metav1.APIGroupList, gv metav1.GroupVersion) bool {
for _, documentGroup := range discovery.Groups {
if documentGroup.Name != gv.Group {