Minor refactor to scale-up orchestrator for more re-usability

cluster-autoscaler/core/scaleup/orchestrator/async_initializer.go

@@ -50,7 +50,8 @@ type AsyncNodeGroupInitializer struct {
 	atomicScaleUp          bool
 }
 
-func newAsyncNodeGroupInitializer(
+// NewAsyncNodeGroupInitializer creates a new AsyncNodeGroupInitializer instance.
+func NewAsyncNodeGroupInitializer(
 	nodeGroup cloudprovider.NodeGroup,
 	nodeInfo *framework.NodeInfo,
 	scaleUpExecutor *scaleUpExecutor,

cluster-autoscaler/core/scaleup/orchestrator/executor.go

@@ -18,8 +18,6 @@ package orchestrator
 
 import (
 	"fmt"
-	"sort"
-	"strings"
 	"sync"
 	"time"
 
@@ -138,7 +136,7 @@ func (e *scaleUpExecutor) executeScaleUpsParallel(
 			failedNodeGroups[i] = result.info.Group
 			scaleUpErrors[i] = result.err
 		}
-		return combineConcurrentScaleUpErrors(scaleUpErrors), failedNodeGroups
+		return errors.CombineErrors(scaleUpErrors), failedNodeGroups
 	}
 	return nil, nil
 }
@@ -188,65 +186,6 @@ func (e *scaleUpExecutor) executeScaleUp(
 	return nil
 }
 
-func combineConcurrentScaleUpErrors(errs []errors.AutoscalerError) errors.AutoscalerError {
-	if len(errs) == 0 {
-		return nil
-	}
-	if len(errs) == 1 {
-		return errs[0]
-	}
-	uniqueMessages := make(map[string]bool)
-	uniqueTypes := make(map[errors.AutoscalerErrorType]bool)
-	for _, err := range errs {
-		uniqueTypes[err.Type()] = true
-		uniqueMessages[err.Error()] = true
-	}
-	if len(uniqueTypes) == 1 && len(uniqueMessages) == 1 {
-		return errs[0]
-	}
-	// sort to stabilize the results and easier log aggregation
-	sort.Slice(errs, func(i, j int) bool {
-		errA := errs[i]
-		errB := errs[j]
-		if errA.Type() == errB.Type() {
-			return errs[i].Error() < errs[j].Error()
-		}
-		return errA.Type() < errB.Type()
-	})
-	firstErr := errs[0]
-	printErrorTypes := len(uniqueTypes) > 1
-	message := formatMessageFromConcurrentErrors(errs, printErrorTypes)
-	return errors.NewAutoscalerError(firstErr.Type(), message)
-}
-
-func formatMessageFromConcurrentErrors(errs []errors.AutoscalerError, printErrorTypes bool) string {
-	firstErr := errs[0]
-	var builder strings.Builder
-	builder.WriteString(firstErr.Error())
-	builder.WriteString(" ...and other concurrent errors: [")
-	formattedErrs := map[errors.AutoscalerError]bool{
-		firstErr: true,
-	}
-	for _, err := range errs {
-		if _, has := formattedErrs[err]; has {
-			continue
-		}
-		formattedErrs[err] = true
-		var message string
-		if printErrorTypes {
-			message = fmt.Sprintf("[%s] %s", err.Type(), err.Error())
-		} else {
-			message = err.Error()
-		}
-		if len(formattedErrs) > 2 {
-			builder.WriteString(", ")
-		}
-		builder.WriteString(fmt.Sprintf("%q", message))
-	}
-	builder.WriteString("]")
-	return builder.String()
-}
-
 // Checks if all groups are scaled only once.
 // Scaling one group multiple times concurrently may cause problems.
 func checkUniqueNodeGroups(scaleUpInfos []nodegroupset.ScaleUpInfo) errors.AutoscalerError {

cluster-autoscaler/core/scaleup/orchestrator/orchestrator.go

@@ -222,7 +222,13 @@ func (o *ScaleUpOrchestrator) ScaleUp(
 			return buildNoOptionsAvailableStatus(markedEquivalenceGroups, skippedNodeGroups, nodeGroups), nil
 		}
 		var scaleUpStatus *status.ScaleUpStatus
-		createNodeGroupResults, scaleUpStatus, aErr = o.CreateNodeGroup(bestOption, nodeInfos, schedulablePodGroups, podEquivalenceGroups, daemonSets, allOrNothing)
+		oldId := bestOption.NodeGroup.Id()
+		if o.autoscalingContext.AsyncNodeGroupsEnabled {
+			initializer := NewAsyncNodeGroupInitializer(bestOption.NodeGroup, nodeInfos[oldId], o.scaleUpExecutor, o.taintConfig, daemonSets, o.processors.ScaleUpStatusProcessor, o.autoscalingContext, allOrNothing)
+			createNodeGroupResults, scaleUpStatus, aErr = o.CreateNodeGroupAsync(bestOption, nodeInfos, schedulablePodGroups, podEquivalenceGroups, daemonSets, initializer)
+		} else {
+			createNodeGroupResults, scaleUpStatus, aErr = o.CreateNodeGroup(bestOption, nodeInfos, schedulablePodGroups, podEquivalenceGroups, daemonSets)
+		}
 		if aErr != nil {
 			return scaleUpStatus, aErr
 		}
@@ -501,46 +507,62 @@ func (o *ScaleUpOrchestrator) CreateNodeGroup(
 	schedulablePodGroups map[string][]estimator.PodEquivalenceGroup,
 	podEquivalenceGroups []*equivalence.PodGroup,
 	daemonSets []*appsv1.DaemonSet,
-	allOrNothing bool,
 ) ([]nodegroups.CreateNodeGroupResult, *status.ScaleUpStatus, errors.AutoscalerError) {
-	createNodeGroupResults := make([]nodegroups.CreateNodeGroupResult, 0)
+	oldId := initialOption.NodeGroup.Id()
+	res, aErr := o.processors.NodeGroupManager.CreateNodeGroup(o.autoscalingContext, initialOption.NodeGroup)
+	return o.processCreateNodeGroupResult(initialOption, oldId, nodeInfos, schedulablePodGroups, podEquivalenceGroups, daemonSets, res, aErr)
+}
 
+// CreateNodeGroupAsync will try to create a new node group asynchronously based on the initialOption.
+func (o *ScaleUpOrchestrator) CreateNodeGroupAsync(
+	initialOption *expander.Option,
+	nodeInfos map[string]*framework.NodeInfo,
+	schedulablePodGroups map[string][]estimator.PodEquivalenceGroup,
+	podEquivalenceGroups []*equivalence.PodGroup,
+	daemonSets []*appsv1.DaemonSet,
+	initializer nodegroups.AsyncNodeGroupInitializer,
+) ([]nodegroups.CreateNodeGroupResult, *status.ScaleUpStatus, errors.AutoscalerError) {
 	oldId := initialOption.NodeGroup.Id()
-	var createNodeGroupResult nodegroups.CreateNodeGroupResult
-	var aErr errors.AutoscalerError
-	if o.autoscalingContext.AsyncNodeGroupsEnabled {
-		initializer := newAsyncNodeGroupInitializer(initialOption.NodeGroup, nodeInfos[oldId], o.scaleUpExecutor, o.taintConfig, daemonSets, o.processors.ScaleUpStatusProcessor, o.autoscalingContext, allOrNothing)
-		createNodeGroupResult, aErr = o.processors.NodeGroupManager.CreateNodeGroupAsync(o.autoscalingContext, initialOption.NodeGroup, initializer)
-	} else {
-		createNodeGroupResult, aErr = o.processors.NodeGroupManager.CreateNodeGroup(o.autoscalingContext, initialOption.NodeGroup)
-	}
+	res, aErr := o.processors.NodeGroupManager.CreateNodeGroupAsync(o.autoscalingContext, initialOption.NodeGroup, initializer)
+	return o.processCreateNodeGroupResult(initialOption, oldId, nodeInfos, schedulablePodGroups, podEquivalenceGroups, daemonSets, res, aErr)
+}
+
+func (o *ScaleUpOrchestrator) processCreateNodeGroupResult(
+	initialOption *expander.Option,
+	initialOptionId string,
+	nodeInfos map[string]*framework.NodeInfo,
+	schedulablePodGroups map[string][]estimator.PodEquivalenceGroup,
+	podEquivalenceGroups []*equivalence.PodGroup,
+	daemonSets []*appsv1.DaemonSet,
+	result nodegroups.CreateNodeGroupResult,
+	aErr errors.AutoscalerError,
+) ([]nodegroups.CreateNodeGroupResult, *status.ScaleUpStatus, errors.AutoscalerError) {
 	if aErr != nil {
 		status, err := status.UpdateScaleUpError(
 			&status.ScaleUpStatus{FailedCreationNodeGroups: []cloudprovider.NodeGroup{initialOption.NodeGroup}, PodsTriggeredScaleUp: initialOption.Pods},
 			aErr)
-		return createNodeGroupResults, status, err
+		return []nodegroups.CreateNodeGroupResult{}, status, err
 	}
 
-	createNodeGroupResults = append(createNodeGroupResults, createNodeGroupResult)
-	initialOption.NodeGroup = createNodeGroupResult.MainCreatedNodeGroup
+	initialOption.NodeGroup = result.MainCreatedNodeGroup
 
 	// If possible replace candidate node-info with node info based on crated node group. The latter
 	// one should be more in line with nodes which will be created by node group.
-	mainCreatedNodeInfo, aErr := simulator.SanitizedTemplateNodeInfoFromNodeGroup(createNodeGroupResult.MainCreatedNodeGroup, daemonSets, o.taintConfig)
+	mainCreatedNodeInfo, aErr := simulator.SanitizedTemplateNodeInfoFromNodeGroup(result.MainCreatedNodeGroup, daemonSets, o.taintConfig)
 	if aErr == nil {
-		nodeInfos[createNodeGroupResult.MainCreatedNodeGroup.Id()] = mainCreatedNodeInfo
-		schedulablePodGroups[createNodeGroupResult.MainCreatedNodeGroup.Id()] = o.SchedulablePodGroups(podEquivalenceGroups, createNodeGroupResult.MainCreatedNodeGroup, mainCreatedNodeInfo)
+		nodeInfos[result.MainCreatedNodeGroup.Id()] = mainCreatedNodeInfo
+		schedulablePodGroups[result.MainCreatedNodeGroup.Id()] = o.SchedulablePodGroups(podEquivalenceGroups, result.MainCreatedNodeGroup, mainCreatedNodeInfo)
 	} else {
-		klog.Warningf("Cannot build node info for newly created main node group %v; balancing similar node groups may not work; err=%v", createNodeGroupResult.MainCreatedNodeGroup.Id(), aErr)
+		klog.Warningf("Cannot build node info for newly created main node group %v; balancing similar node groups may not work; err=%v", result.MainCreatedNodeGroup.Id(), aErr)
 		// Use node info based on expansion candidate but update Id which likely changed when node group was created.
-		nodeInfos[createNodeGroupResult.MainCreatedNodeGroup.Id()] = nodeInfos[oldId]
-		schedulablePodGroups[createNodeGroupResult.MainCreatedNodeGroup.Id()] = schedulablePodGroups[oldId]
+		nodeInfos[result.MainCreatedNodeGroup.Id()] = nodeInfos[initialOptionId]
+		schedulablePodGroups[result.MainCreatedNodeGroup.Id()] = schedulablePodGroups[initialOptionId]
 	}
-	if oldId != createNodeGroupResult.MainCreatedNodeGroup.Id() {
-		delete(nodeInfos, oldId)
-		delete(schedulablePodGroups, oldId)
+	if initialOptionId != result.MainCreatedNodeGroup.Id() {
+		delete(nodeInfos, initialOptionId)
+		delete(schedulablePodGroups, initialOptionId)
 	}
-	for _, nodeGroup := range createNodeGroupResult.ExtraCreatedNodeGroups {
+	for _, nodeGroup := range result.ExtraCreatedNodeGroups {
 		nodeInfo, aErr := simulator.SanitizedTemplateNodeInfoFromNodeGroup(nodeGroup, daemonSets, o.taintConfig)
 		if aErr != nil {
 			klog.Warningf("Cannot build node info for newly created extra node group %v; balancing similar node groups will not work; err=%v", nodeGroup.Id(), aErr)
@@ -554,7 +576,7 @@ func (o *ScaleUpOrchestrator) CreateNodeGroup(
 	// TODO(lukaszos) when pursuing scalability update this call with one which takes list of changed node groups so we do not
 	//                do extra API calls. (the call at the bottom of ScaleUp() could be also changed then)
 	o.clusterStateRegistry.Recalculate()
-	return createNodeGroupResults, nil, nil
+	return []nodegroups.CreateNodeGroupResult{result}, nil, nil
 }
 
 // SchedulablePodGroups returns a list of pods that could be scheduled