Remove freezer code

config/core/configmaps/deployment.yaml

@@ -22,7 +22,7 @@ metadata:
     app.kubernetes.io/component: controller
     app.kubernetes.io/version: devel
   annotations:
-    knative.dev/example-checksum: "ac007ed2"
+    knative.dev/example-checksum: "410041a0"
 data:
   # This is the Go import path for the binary that is containerized
   # and substituted here.
@@ -88,26 +88,3 @@ data:
     # Sets rootCA for the queue proxy - used by QPOptions
     # If omitted, or empty, no rootCA is added to the golang rootCAs
     queue-sidecar-rootca: ""
-
-    # The freezer service endpoint that queue-proxy calls when its traffic drops to zero or
-    # scales up from zero.
-    #
-    # Freezer service is available at: https://github.com/knative-sandbox/container-freezer
-    # or users may write their own service.
-    #
-    # The value will need to include both the host and the port that will be accessed.
-    # For the host, $HOST_IP can be passed, and the appropriate host IP value will be swapped
-    # in at runtime, which will enable the freezer daemonset to be reachable via the node IP.
-    #
-    # As an example:
-    #     concurrency-state-endpoint: "http://$HOST_IP:9696"
-    #
-    # If not set, queue proxy takes no action (this is the default behavior).
-    #
-    # When enabled, a serviceAccountToken will be mounted to queue-proxy using
-    # a projected volume. This requires the Service Account Token Volume Projection feature
-    # to be enabled. For details, see this link:
-    # https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/#service-account-token-volume-projection
-    #
-    # NOTE THAT THIS IS AN EXPERIMENTAL / ALPHA FEATURE
-    concurrency-state-endpoint: ""

pkg/deployment/config.go

@@ -68,9 +68,6 @@ const (
 	// qpoptions
 	queueSidecarTokenAudiencesKey = "queue-sidecar-token-audiences"
 	queueSidecarRooCAKey          = "queue-sidecar-rootca"
-
-	// concurrencyStateEndpointKey is the key to configure the endpoint Queue Proxy will call when traffic drops to / increases from zero.
-	concurrencyStateEndpointKey = "concurrency-state-endpoint"
 )
 
 var (
@@ -86,7 +83,6 @@ func defaultConfig() *Config {
 		DigestResolutionTimeout:        digestResolutionTimeoutDefault,
 		RegistriesSkippingTagResolving: sets.NewString("kind.local", "ko.local", "dev.local"),
 		QueueSidecarCPURequest:         &QueueSidecarCPURequestDefault,
-		ConcurrencyStateEndpoint:       "",
 	}
 	// The following code is needed for ConfigMap testing.
 	// defaultConfig must match the example in deployment.yaml which includes: `queue-sidecar-token-audiences: ""`
@@ -113,7 +109,6 @@ func NewConfigFromMap(configMap map[string]string) (*Config, error) {
 		cm.AsQuantity("queueSidecarCPULimit", &nc.QueueSidecarCPULimit),
 		cm.AsQuantity("queueSidecarMemoryLimit", &nc.QueueSidecarMemoryLimit),
 		cm.AsQuantity("queueSidecarEphemeralStorageLimit", &nc.QueueSidecarEphemeralStorageLimit),
-		cm.AsString("concurrencyStateEndpoint", &nc.ConcurrencyStateEndpoint),
 
 		cm.AsString(QueueSidecarImageKey, &nc.QueueSidecarImage),
 		cm.AsDuration(ProgressDeadlineKey, &nc.ProgressDeadline),
@@ -129,8 +124,6 @@ func NewConfigFromMap(configMap map[string]string) (*Config, error) {
 
 		cm.AsStringSet(queueSidecarTokenAudiencesKey, &nc.QueueSidecarTokenAudiences),
 		cm.AsString(queueSidecarRooCAKey, &nc.QueueSidecarRootCA),
-
-		cm.AsString(concurrencyStateEndpointKey, &nc.ConcurrencyStateEndpoint),
 	); err != nil {
 		return nil, err
 	}
@@ -201,7 +194,4 @@ type Config struct {
 
 	// QueueSidecarRootCA is a root certificate to be trusted by the queue proxy sidecar  qpoptions.
 	QueueSidecarRootCA string
-
-	// ConcurrencyStateEndpoint is the endpoint Queue Proxy will call when traffic drops to / increases from zero.
-	ConcurrencyStateEndpoint string
 }

pkg/deployment/config_test.go

@@ -200,21 +200,6 @@ func TestControllerConfiguration(t *testing.T) {
 			QueueSidecarImageKey: defaultSidecarImage,
 			ProgressDeadlineKey:  "1982ms",
 		},
-	}, {
-		name: "controller configuration with concurrency state endpoint",
-		wantConfig: &Config{
-			RegistriesSkippingTagResolving: sets.NewString("kind.local", "ko.local", "dev.local"),
-			DigestResolutionTimeout:        digestResolutionTimeoutDefault,
-			QueueSidecarImage:              defaultSidecarImage,
-			QueueSidecarCPURequest:         &QueueSidecarCPURequestDefault,
-			ProgressDeadline:               ProgressDeadlineDefault,
-			QueueSidecarTokenAudiences:     sets.NewString(""),
-			ConcurrencyStateEndpoint:       "freeze-proxy",
-		},
-		data: map[string]string{
-			QueueSidecarImageKey:        defaultSidecarImage,
-			concurrencyStateEndpointKey: "freeze-proxy",
-		},
 	}, {
 		name: "legacy keys supported",
 		data: map[string]string{
@@ -229,7 +214,6 @@ func TestControllerConfiguration(t *testing.T) {
 			"queueSidecarMemoryLimit":             "8M",
 			"queueSidecarEphemeralStorageRequest": "9M",
 			"queueSidecarEphemeralStorageLimit":   "10M",
-			"concurrencyStateEndpoint":            "11",
 		},
 		wantConfig: &Config{
 			QueueSidecarImage:                   "1",
@@ -242,7 +226,6 @@ func TestControllerConfiguration(t *testing.T) {
 			QueueSidecarMemoryLimit:             quantity("8M"),
 			QueueSidecarEphemeralStorageRequest: quantity("9M"),
 			QueueSidecarEphemeralStorageLimit:   quantity("10M"),
-			ConcurrencyStateEndpoint:            "11",
 			QueueSidecarTokenAudiences:          sets.NewString(""),
 		},
 	}, {
@@ -260,7 +243,6 @@ func TestControllerConfiguration(t *testing.T) {
 			"queueSidecarEphemeralStorageRequest": "9M",
 			"queueSidecarEphemeralStorageLimit":   "10M",
 			"queueSidecarTokens":                  "bar",
-			"concurrencyStateEndpoint":            "11",
 
 			QueueSidecarImageKey:                   "12",
 			ProgressDeadlineKey:                    "13s",
@@ -273,7 +255,6 @@ func TestControllerConfiguration(t *testing.T) {
 			queueSidecarEphemeralStorageRequestKey: "20M",
 			queueSidecarEphemeralStorageLimitKey:   "21M",
 			queueSidecarTokenAudiencesKey:          "foo",
-			concurrencyStateEndpointKey:            "22",
 		},
 		wantConfig: &Config{
 			QueueSidecarImage:                   "12",
@@ -287,7 +268,6 @@ func TestControllerConfiguration(t *testing.T) {
 			QueueSidecarEphemeralStorageRequest: quantity("20M"),
 			QueueSidecarEphemeralStorageLimit:   quantity("21M"),
 			QueueSidecarTokenAudiences:          sets.NewString("foo"),
-			ConcurrencyStateEndpoint:            "22",
 		},
 	}}