Merge pull request #599 from ffromani/nrt-extra-informer

nrt: cache: add support for dedicated informer

Author: k8s-ci-robot

apis/config/types.go

@@ -176,6 +176,14 @@ const (
 	CacheResyncOnlyExclusiveResources CacheResyncMethod = "OnlyExclusiveResources"
 )
 
+// CacheInformerMode is a "string" type
+type CacheInformerMode string
+
+const (
+	CacheInformerShared    CacheInformerMode = "Shared"
+	CacheInformerDedicated CacheInformerMode = "Dedicated"
+)
+
 // NodeResourceTopologyCache define configuration details for the NodeResourceTopology cache.
 type NodeResourceTopologyCache struct {
 	// ForeignPodsDetect sets how foreign pods should be handled.
@@ -192,6 +200,11 @@ type NodeResourceTopologyCache struct {
 	// Has no effect if caching is disabled (CacheResyncPeriod is zero) or if DiscardReservedNodes
 	// is enabled. "Autodetect" is the default, reads hint from NRT objects. Fallback is "All".
 	ResyncMethod *CacheResyncMethod
+	// InformerMode controls the channel the cache uses to get updates about pods.
+	// "Shared" uses the default settings; "Dedicated" creates a specific subscription which is
+	// guaranteed to best suit the cache needs, at cost of one extra connection.
+	// If unspecified, default is "Dedicated"
+	InformerMode *CacheInformerMode
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

apis/config/v1/defaults.go

@@ -89,6 +89,8 @@ var (
 
 	defaultResyncMethod = CacheResyncAutodetect
 
+	defaultInformerMode = CacheInformerDedicated
+
 	// Defaults for NetworkOverhead
 	// DefaultWeightsName contains the default costs to be used by networkAware plugins
 	DefaultWeightsName = "UserDefined"
@@ -200,6 +202,9 @@ func SetDefaults_NodeResourceTopologyMatchArgs(obj *NodeResourceTopologyMatchArg
 	if obj.Cache.ResyncMethod == nil {
 		obj.Cache.ResyncMethod = &defaultResyncMethod
 	}
+	if obj.Cache.InformerMode == nil {
+		obj.Cache.InformerMode = &defaultInformerMode
+	}
 }
 
 // SetDefaults_PreemptionTolerationArgs reuses SetDefaults_DefaultPreemptionArgs

apis/config/v1/defaults_test.go

@@ -205,6 +205,7 @@ func TestSchedulingDefaults(t *testing.T) {
 				Cache: &NodeResourceTopologyCache{
 					ForeignPodsDetect: &defaultForeignPodsDetect,
 					ResyncMethod:      &defaultResyncMethod,
+					InformerMode:      &defaultInformerMode,
 				},
 			},
 		},

apis/config/v1/types.go

@@ -174,6 +174,14 @@ const (
 	CacheResyncOnlyExclusiveResources CacheResyncMethod = "OnlyExclusiveResources"
 )
 
+// CacheInformerMode is a "string" type
+type CacheInformerMode string
+
+const (
+	CacheInformerShared    CacheInformerMode = "Shared"
+	CacheInformerDedicated CacheInformerMode = "Dedicated"
+)
+
 // NodeResourceTopologyCache define configuration details for the NodeResourceTopology cache.
 type NodeResourceTopologyCache struct {
 	// ForeignPodsDetect sets how foreign pods should be handled.
@@ -190,6 +198,11 @@ type NodeResourceTopologyCache struct {
 	// Has no effect if caching is disabled (CacheResyncPeriod is zero) or if DiscardReservedNodes
 	// is enabled. "Autodetect" is the default, reads hint from NRT objects. Fallback is "All".
 	ResyncMethod *CacheResyncMethod `json:"resyncMethod,omitempty"`
+	// InformerMode controls the channel the cache uses to get updates about pods.
+	// "Shared" uses the default settings; "Dedicated" creates a specific subscription which is
+	// guaranteed to best suit the cache needs, at cost of one extra connection.
+	// If unspecified, default is "Dedicated"
+	InformerMode *CacheInformerMode `json:"informerMode,omitempty"`
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

apis/config/v1/zz_generated.conversion.go

@@ -89,6 +89,8 @@ var (
 
 	defaultResyncMethod = CacheResyncAutodetect
 
+	defaultInformerMode = CacheInformerDedicated
+
 	// Defaults for NetworkOverhead
 	// DefaultWeightsName contains the default costs to be used by networkAware plugins
 	DefaultWeightsName = "UserDefined"
@@ -200,6 +202,9 @@ func SetDefaults_NodeResourceTopologyMatchArgs(obj *NodeResourceTopologyMatchArg
 	if obj.Cache.ResyncMethod == nil {
 		obj.Cache.ResyncMethod = &defaultResyncMethod
 	}
+	if obj.Cache.InformerMode == nil {
+		obj.Cache.InformerMode = &defaultInformerMode
+	}
 }
 
 // SetDefaults_PreemptionTolerationArgs reuses SetDefaults_DefaultPreemptionArgs

apis/config/v1/zz_generated.deepcopy.go

@@ -205,6 +205,7 @@ func TestSchedulingDefaults(t *testing.T) {
 				Cache: &NodeResourceTopologyCache{
 					ForeignPodsDetect: &defaultForeignPodsDetect,
 					ResyncMethod:      &defaultResyncMethod,
+					InformerMode:      &defaultInformerMode,
 				},
 			},
 		},

apis/config/v1beta3/defaults.go

@@ -174,6 +174,14 @@ const (
 	CacheResyncOnlyExclusiveResources CacheResyncMethod = "OnlyExclusiveResources"
 )
 
+// CacheInformerMode is a "string" type
+type CacheInformerMode string
+
+const (
+	CacheInformerShared    CacheInformerMode = "Shared"
+	CacheInformerDedicated CacheInformerMode = "Dedicated"
+)
+
 // NodeResourceTopologyCache define configuration details for the NodeResourceTopology cache.
 type NodeResourceTopologyCache struct {
 	// ForeignPodsDetect sets how foreign pods should be handled.
@@ -190,6 +198,11 @@ type NodeResourceTopologyCache struct {
 	// Has no effect if caching is disabled (CacheResyncPeriod is zero) or if DiscardReservedNodes
 	// is enabled. "Autodetect" is the default, reads hint from NRT objects. Fallback is "All".
 	ResyncMethod *CacheResyncMethod `json:"resyncMethod,omitempty"`
+	// InformerMode controls the channel the cache uses to get updates about pods.
+	// "Shared" uses the default settings; "Dedicated" creates a specific subscription which is
+	// guaranteed to best suit the cache needs, at cost of one extra connection.
+	// If unspecified, default is "Dedicated"
+	InformerMode *CacheInformerMode `json:"informerMode,omitempty"`
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object