Merge pull request #49547 from k82cn/k8s_42001_0

pkg/features/kube_features.go

@@ -126,6 +126,13 @@ const (
 	//
 	// Enable equivalence class cache for scheduler.
 	EnableEquivalenceClassCache utilfeature.Feature = "EnableEquivalenceClassCache"
+
+	// owner: @k82cn
+	// alpha: v1.8
+	//
+	// Taint nodes based on their condition status for 'NetworkUnavailable',
+	// 'MemoryPressure', 'OutOfDisk' and 'DiskPressure'.
+	TaintNodesByCondition utilfeature.Feature = "TaintNodesByCondition"
 )
 
 func init() {
@@ -156,4 +163,5 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	// unintentionally on either side:
 	StreamingProxyRedirects:          {Default: true, PreRelease: utilfeature.Beta},
 	genericfeatures.AdvancedAuditing: {Default: false, PreRelease: utilfeature.Alpha},
+	TaintNodesByCondition:            {Default: false, PreRelease: utilfeature.Alpha},
 }

plugin/pkg/scheduler/algorithm/well_known_labels.go

@@ -28,6 +28,26 @@ const (
 	// and removed when node becomes reachable (NodeReady status ConditionTrue).
 	TaintNodeUnreachable = "node.alpha.kubernetes.io/unreachable"
 
+	// When feature-gate for TaintBasedEvictions=true flag is enabled,
+	// TaintNodeOutOfDisk would be automatically added by node controller
+	// when node becomes out of disk, and removed when node has enough disk.
+	TaintNodeOutOfDisk = "node.kubernetes.io/outOfDisk"
+
+	// When feature-gate for TaintBasedEvictions=true flag is enabled,
+	// TaintNodeMemoryPressure would be automatically added by node controller
+	// when node has memory pressure, and removed when node has enough memory.
+	TaintNodeMemoryPressure = "node.kubernetes.io/memoryPressure"
+
+	// When feature-gate for TaintBasedEvictions=true flag is enabled,
+	// TaintNodeDiskPressure would be automatically added by node controller
+	// when node has disk pressure, and removed when node has enough disk.
+	TaintNodeDiskPressure = "node.kubernetes.io/diskPressure"
+
+	// When feature-gate for TaintBasedEvictions=true flag is enabled,
+	// TaintNodeNetworkUnavailable would be automatically added by node controller
+	// when node's network is unavailable, and removed when network becomes ready.
+	TaintNodeNetworkUnavailable = "node.kubernetes.io/networkUnavailable"
+
 	// When kubelet is started with the "external" cloud provider, then
 	// it sets this taint on a node to mark it as unusable, until a controller
 	// from the cloud-controller-manager intitializes this node, and then removes