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Merge pull request #83195 from wojtek-t/watch_bookmarks_ga

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Promote WatchBookmarks feature to GA
This commit is contained in:
Kubernetes Prow Robot 2019-10-17 11:30:38 -07:00 committed by GitHub
commit 006378fcc1
10 changed files with 445 additions and 471 deletions
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862
api/openapi-spec/swagger.json generated
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2
staging/src/k8s.io/apiextensions-apiserver/pkg/generated/openapi/zz_generated.openapi.go generated
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@ -1848,7 +1848,7 @@ func schema_pkg_apis_meta_v1_ListOptions(ref common.ReferenceCallback) common.Op
},
"allowWatchBookmarks": {
SchemaProps: spec.SchemaProps{
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.\n\nThis field is beta.",
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.",
Type: []string{"boolean"},
Format: "",
},

3
staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/generated.proto
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@ -416,9 +416,6 @@ message ListOptions {
// If this is not a watch, this field is ignored.
// If the feature gate WatchBookmarks is not enabled in apiserver,
// this field is ignored.
//
// This field is beta.
//
// +optional
optional bool allowWatchBookmarks = 9;

3
staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types.go
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@ -351,9 +351,6 @@ type ListOptions struct {
// If this is not a watch, this field is ignored.
// If the feature gate WatchBookmarks is not enabled in apiserver,
// this field is ignored.
//
// This field is beta.
//
// +optional
AllowWatchBookmarks bool `json:"allowWatchBookmarks,omitempty" protobuf:"varint,9,opt,name=allowWatchBookmarks"`

2
staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types_swagger_doc_generated.go generated
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@ -194,7 +194,7 @@ var map_ListOptions = map[string]string{
"labelSelector": "A selector to restrict the list of returned objects by their labels. Defaults to everything.",
"fieldSelector": "A selector to restrict the list of returned objects by their fields. Defaults to everything.",
"watch": "Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.",
"allowWatchBookmarks": "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.\n\nThis field is beta.",
"allowWatchBookmarks": "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.",
"resourceVersion": "When specified with a watch call, shows changes that occur after that particular version of a resource. Defaults to changes from the beginning of history. When specified for list: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.",
"timeoutSeconds": "Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.",
"limit": "limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true.\n\nThe server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.",

3
staging/src/k8s.io/apiserver/pkg/features/kube_features.go
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@ -123,6 +123,7 @@ const (
// owner: @wojtek-t
// alpha: v1.15
// beta: v1.16
// GA: v1.17
//
// Enables support for watch bookmark events.
WatchBookmark featuregate.Feature = "WatchBookmark"
@ -161,7 +162,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
StorageVersionHash: {Default: true, PreRelease: featuregate.Beta},
WinOverlay: {Default: false, PreRelease: featuregate.Alpha},
WinDSR: {Default: false, PreRelease: featuregate.Alpha},
WatchBookmark: {Default: true, PreRelease: featuregate.Beta},
WatchBookmark: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
RequestManagement: {Default: false, PreRelease: featuregate.Alpha},
RemoveSelfLink: {Default: false, PreRelease: featuregate.Alpha},
}

19
staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher.go
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@ -301,8 +301,6 @@ type Cacher struct {
watchersToStop []*cacheWatcher
// Maintain a timeout queue to send the bookmark event before the watcher times out.
bookmarkWatchers *watcherBookmarkTimeBuckets
// watchBookmark feature-gate
watchBookmarkEnabled bool
}
// NewCacherFromConfig creates a new Cacher responsible for servicing WATCH and LIST requests from
@ -355,11 +353,10 @@ func NewCacherFromConfig(config Config) (*Cacher, error) {
// - reflector.ListAndWatch
// and there are no guarantees on the order that they will stop.
// So we will be simply closing the channel, and synchronizing on the WaitGroup.
stopCh: stopCh,
clock: clock,
timer: time.NewTimer(time.Duration(0)),
bookmarkWatchers: newTimeBucketWatchers(clock),
watchBookmarkEnabled: utilfeature.DefaultFeatureGate.Enabled(features.WatchBookmark),
stopCh: stopCh,
clock: clock,
timer: time.NewTimer(time.Duration(0)),
bookmarkWatchers: newTimeBucketWatchers(clock),
}
// Ensure that timer is stopped.
@ -516,8 +513,8 @@ func (c *Cacher) Watch(ctx context.Context, key string, resourceVersion string,
watcher.forget = forgetWatcher(c, c.watcherIdx, triggerValue, triggerSupported)
c.watchers.addWatcher(watcher, c.watcherIdx, triggerValue, triggerSupported)
// Add it to the queue only when server and client support watch bookmarks.
if c.watchBookmarkEnabled && watcher.allowWatchBookmarks {
// Add it to the queue only when the client support watch bookmarks.
if watcher.allowWatchBookmarks {
c.bookmarkWatchers.addWatcher(watcher)
}
c.watcherIdx++
@ -790,10 +787,6 @@ func (c *Cacher) processEvent(event *watchCacheEvent) {
func (c *Cacher) dispatchEvents() {
// Jitter to help level out any aggregate load.
bookmarkTimer := c.clock.NewTimer(wait.Jitter(time.Second, 0.25))
// Stop the timer when watchBookmarkFeatureGate is not enabled.
if !c.watchBookmarkEnabled && !bookmarkTimer.Stop() {
<-bookmarkTimer.C()
}
defer bookmarkTimer.Stop()
lastProcessedResourceVersion := uint64(0)

18
staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher_whitebox_test.go
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@ -658,8 +658,7 @@ func TestCacherNoLeakWithMultipleWatchers(t *testing.T) {
}
}
func testCacherSendBookmarkEvents(t *testing.T, watchCacheEnabled, allowWatchBookmarks, expectedBookmarks bool) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.WatchBookmark, watchCacheEnabled)()
func testCacherSendBookmarkEvents(t *testing.T, allowWatchBookmarks, expectedBookmarks bool) {
backingStorage := &dummyStorage{}
cacher, _, err := newTestCacher(backingStorage, 1000)
if err != nil {
@ -729,34 +728,21 @@ func testCacherSendBookmarkEvents(t *testing.T, watchCacheEnabled, allowWatchBoo
func TestCacherSendBookmarkEvents(t *testing.T) {
testCases := []struct {
watchCacheEnabled bool
allowWatchBookmarks bool
expectedBookmarks bool
}{
{
watchCacheEnabled: true,
allowWatchBookmarks: true,
expectedBookmarks: true,
},
{
watchCacheEnabled: true,
allowWatchBookmarks: false,
expectedBookmarks: false,
},
{
watchCacheEnabled: false,
allowWatchBookmarks: true,
expectedBookmarks: false,
},
{
watchCacheEnabled: false,
allowWatchBookmarks: false,
expectedBookmarks: false,
},
}
for _, tc := range testCases {
testCacherSendBookmarkEvents(t, tc.watchCacheEnabled, tc.allowWatchBookmarks, tc.expectedBookmarks)
testCacherSendBookmarkEvents(t, tc.allowWatchBookmarks, tc.expectedBookmarks)
}
}

2
staging/src/k8s.io/code-generator/_examples/apiserver/openapi/zz_generated.openapi.go generated
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@ -1057,7 +1057,7 @@ func schema_pkg_apis_meta_v1_ListOptions(ref common.ReferenceCallback) common.Op
},
"allowWatchBookmarks": {
SchemaProps: spec.SchemaProps{
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.\n\nThis field is beta.",
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.",
Type: []string{"boolean"},
Format: "",
},

2
staging/src/k8s.io/sample-apiserver/pkg/generated/openapi/zz_generated.openapi.go generated
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@ -1058,7 +1058,7 @@ func schema_pkg_apis_meta_v1_ListOptions(ref common.ReferenceCallback) common.Op
},
"allowWatchBookmarks": {
SchemaProps: spec.SchemaProps{
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.\n\nThis field is beta.",
Description: "allowWatchBookmarks requests watch events with type \"BOOKMARK\". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.",
Type: []string{"boolean"},
Format: "",
},