update logic of adding default DS pod tolerations

- update DS pod default tolerations: add PIDPressure, remove OutOfDisk
- remove useless tolerations testcases

test/integration/scheduler/taint_test.go

@@ -145,24 +145,12 @@ func TestTaintNodeByCondition(t *testing.T) {
 		Effect:   v1.TaintEffectNoSchedule,
 	}
 
-	unreachableToleration := v1.Toleration{
-		Key:      schedulerapi.TaintNodeUnreachable,
-		Operator: v1.TolerationOpExists,
-		Effect:   v1.TaintEffectNoSchedule,
-	}
-
 	unschedulableToleration := v1.Toleration{
 		Key:      schedulerapi.TaintNodeUnschedulable,
 		Operator: v1.TolerationOpExists,
 		Effect:   v1.TaintEffectNoSchedule,
 	}
 
-	outOfDiskToleration := v1.Toleration{
-		Key:      schedulerapi.TaintNodeOutOfDisk,
-		Operator: v1.TolerationOpExists,
-		Effect:   v1.TaintEffectNoSchedule,
-	}
-
 	memoryPressureToleration := v1.Toleration{
 		Key:      schedulerapi.TaintNodeMemoryPressure,
 		Operator: v1.TolerationOpExists,
@@ -240,46 +228,6 @@ func TestTaintNodeByCondition(t *testing.T) {
 				},
 			},
 		},
-		{
-			name: "unreachable node",
-			existingTaints: []v1.Taint{
-				{
-					Key:    schedulerapi.TaintNodeUnreachable,
-					Effect: v1.TaintEffectNoSchedule,
-				},
-			},
-			nodeConditions: []v1.NodeCondition{
-				{
-					Type:   v1.NodeReady,
-					Status: v1.ConditionUnknown, // node status is "Unknown"
-				},
-			},
-			expectedTaints: []v1.Taint{
-				{
-					Key:    schedulerapi.TaintNodeUnreachable,
-					Effect: v1.TaintEffectNoSchedule,
-				},
-			},
-			pods: []podCase{
-				{
-					pod:  bestEffortPod,
-					fits: false,
-				},
-				{
-					pod:  burstablePod,
-					fits: false,
-				},
-				{
-					pod:  guaranteePod,
-					fits: false,
-				},
-				{
-					pod:         bestEffortPod,
-					tolerations: []v1.Toleration{unreachableToleration},
-					fits:        true,
-				},
-			},
-		},
 		{
 			name:          "unschedulable node",
 			unschedulable: true, // node.spec.unschedulable = true
@@ -315,50 +263,6 @@ func TestTaintNodeByCondition(t *testing.T) {
 				},
 			},
 		},
-		{
-			name: "out of disk node",
-			nodeConditions: []v1.NodeCondition{
-				{
-					Type:   v1.NodeOutOfDisk,
-					Status: v1.ConditionTrue,
-				},
-				{
-					Type:   v1.NodeReady,
-					Status: v1.ConditionTrue,
-				},
-			},
-			expectedTaints: []v1.Taint{
-				{
-					Key:    schedulerapi.TaintNodeOutOfDisk,
-					Effect: v1.TaintEffectNoSchedule,
-				},
-			},
-			// In OutOfDisk condition, only pods with toleration can be scheduled.
-			pods: []podCase{
-				{
-					pod:  bestEffortPod,
-					fits: false,
-				},
-				{
-					pod:  burstablePod,
-					fits: false,
-				},
-				{
-					pod:  guaranteePod,
-					fits: false,
-				},
-				{
-					pod:         bestEffortPod,
-					tolerations: []v1.Toleration{outOfDiskToleration},
-					fits:        true,
-				},
-				{
-					pod:         bestEffortPod,
-					tolerations: []v1.Toleration{diskPressureToleration},
-					fits:        false,
-				},
-			},
-		},
 		{
 			name: "memory pressure node",
 			nodeConditions: []v1.NodeCondition{