Merge pull request #46266 from thockin/proxy-periodic-runner-2

Automatic merge from submit-queue (batch tested with PRs 44774, 46266, 46248, 46403, 46430)

kube-proxy: ratelimit runs of iptables by sync-period flags

This bounds how frequently iptables can be synced.  It will be no more often than every 10 seconds and no less often than every 1 minute, by default.

@timothysc FYI

@dcbw @freehan FYI

staging/src/k8s.io/apiserver/Godeps/Godeps.json

@@ -480,7 +480,7 @@
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
-			"Rev": "77ed1c8a01217656d2080ad51981f6e99adaa177"
+			"Rev": "5b9ff866471762aa2ab2dced63c9fb6f53921342"
 		},
 		{
 			"ImportPath": "github.com/karlseguin/ccache",

staging/src/k8s.io/client-go/Godeps/Godeps.json

@@ -160,7 +160,7 @@
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
-			"Rev": "77ed1c8a01217656d2080ad51981f6e99adaa177"
+			"Rev": "5b9ff866471762aa2ab2dced63c9fb6f53921342"
 		},
 		{
 			"ImportPath": "github.com/mailru/easyjson/buffer",

staging/src/k8s.io/client-go/util/flowcontrol/throttle.go

@@ -51,6 +51,22 @@ type tokenBucketRateLimiter struct {
 // The maximum number of tokens in the bucket is capped at 'burst'.
 func NewTokenBucketRateLimiter(qps float32, burst int) RateLimiter {
 	limiter := ratelimit.NewBucketWithRate(float64(qps), int64(burst))
+	return newTokenBucketRateLimiter(limiter, qps)
+}
+
+// An injectable, mockable clock interface.
+type Clock interface {
+	ratelimit.Clock
+}
+
+// NewTokenBucketRateLimiterWithClock is identical to NewTokenBucketRateLimiter
+// but allows an injectable clock, for testing.
+func NewTokenBucketRateLimiterWithClock(qps float32, burst int, clock Clock) RateLimiter {
+	limiter := ratelimit.NewBucketWithRateAndClock(float64(qps), int64(burst), clock)
+	return newTokenBucketRateLimiter(limiter, qps)
+}
+
+func newTokenBucketRateLimiter(limiter *ratelimit.Bucket, qps float32) RateLimiter {
 	return &tokenBucketRateLimiter{
 		limiter: limiter,
 		qps:     qps,

staging/src/k8s.io/kube-aggregator/Godeps/Godeps.json

@@ -236,7 +236,7 @@
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
-			"Rev": "77ed1c8a01217656d2080ad51981f6e99adaa177"
+			"Rev": "5b9ff866471762aa2ab2dced63c9fb6f53921342"
 		},
 		{
 			"ImportPath": "github.com/mailru/easyjson/buffer",

staging/src/k8s.io/kube-apiextensions-server/Godeps/Godeps.json

@@ -228,7 +228,7 @@
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
-			"Rev": "77ed1c8a01217656d2080ad51981f6e99adaa177"
+			"Rev": "5b9ff866471762aa2ab2dced63c9fb6f53921342"
 		},
 		{
 			"ImportPath": "github.com/mailru/easyjson/buffer",

staging/src/k8s.io/sample-apiserver/Godeps/Godeps.json

@@ -228,7 +228,7 @@
 		},
 		{
 			"ImportPath": "github.com/juju/ratelimit",
-			"Rev": "77ed1c8a01217656d2080ad51981f6e99adaa177"
+			"Rev": "5b9ff866471762aa2ab2dced63c9fb6f53921342"
 		},
 		{
 			"ImportPath": "github.com/mailru/easyjson/buffer",