add support for the traffic weight > 100.

pkg/apis/rollouts/v1alpha1/types.go

@@ -379,11 +379,14 @@ type RolloutTrafficRouting struct {
 	ManagedRoutes []MangedRoutes `json:"managedRoutes,omitempty" protobuf:"bytes,8,rep,name=managedRoutes"`
 	// Apisix holds specific configuration to use Apisix to route traffic
 	Apisix *ApisixTrafficRouting `json:"apisix,omitempty" protobuf:"bytes,9,opt,name=apisix"`
+
 	// +kubebuilder:validation:Schemaless
 	// +kubebuilder:pruning:PreserveUnknownFields
 	// +kubebuilder:validation:Type=object
 	// Plugins holds specific configuration that traffic router plugins can use for routing traffic
 	Plugins map[string]json.RawMessage `json:"plugins,omitempty" protobuf:"bytes,10,opt,name=plugins"`
+
+	MaxTrafficWeight *int32 `json:"maxTrafficWeight,omitempty" protobuf:"varint,11,opt,name=maxTrafficWeight"`
 }
 
 type MangedRoutes struct {

pkg/apis/rollouts/validation/validation.go

@@ -20,15 +20,16 @@ import (
 
 	"github.com/argoproj/argo-rollouts/pkg/apis/rollouts/v1alpha1"
 	"github.com/argoproj/argo-rollouts/utils/defaults"
+	"github.com/argoproj/argo-rollouts/utils/weightutil"
 )
 
 const (
 	// Validate Spec constants
 
 	// MissingFieldMessage the message to indicate rollout is missing a field
 	MissingFieldMessage = "Rollout has missing field '%s'"
-	// InvalidSetWeightMessage indicates the setweight value needs to be between 0 and 100
-	InvalidSetWeightMessage = "SetWeight needs to be between 0 and 100"
+	// InvalidSetWeightMessage indicates the setweight value needs to be between 0 and max weight
+	InvalidSetWeightMessage = "SetWeight needs to be between 0 and %d"
 	// InvalidCanaryExperimentTemplateWeightWithoutTrafficRouting indicates experiment weight cannot be set without trafficRouting
 	InvalidCanaryExperimentTemplateWeightWithoutTrafficRouting = "Experiment template weight cannot be set unless TrafficRouting is enabled"
 	// InvalidSetCanaryScaleTrafficPolicy indicates that TrafficRouting, required for SetCanaryScale, is missing
@@ -292,8 +293,11 @@ func ValidateRolloutStrategyCanary(rollout *v1alpha1.Rollout, fldPath *field.Pat
 				step.Experiment == nil, step.Pause == nil, step.SetWeight == nil, step.Analysis == nil, step.SetCanaryScale == nil, step.SetHeaderRoute == nil, step.SetMirrorRoute == nil)
 			allErrs = append(allErrs, field.Invalid(stepFldPath, errVal, InvalidStepMessage))
 		}
-		if step.SetWeight != nil && (*step.SetWeight < 0 || *step.SetWeight > 100) {
-			allErrs = append(allErrs, field.Invalid(stepFldPath.Child("setWeight"), *canary.Steps[i].SetWeight, InvalidSetWeightMessage))
+
+		maxTrafficWeight := weightutil.MaxTrafficWeight(rollout)
+
+		if step.SetWeight != nil && (*step.SetWeight < 0 || *step.SetWeight > maxTrafficWeight) {
+			allErrs = append(allErrs, field.Invalid(stepFldPath.Child("setWeight"), *canary.Steps[i].SetWeight, fmt.Sprintf(InvalidSetWeightMessage, maxTrafficWeight)))
 		}
 		if step.Pause != nil && step.Pause.DurationSeconds() < 0 {
 			allErrs = append(allErrs, field.Invalid(stepFldPath.Child("pause").Child("duration"), step.Pause.DurationSeconds(), InvalidDurationMessage))

pkg/apis/rollouts/validation/validation_test.go

@@ -239,7 +239,7 @@ func TestValidateRolloutStrategyCanary(t *testing.T) {
 		invalidRo := ro.DeepCopy()
 		invalidRo.Spec.Strategy.Canary.Steps[0].SetWeight = &setWeight
 		allErrs := ValidateRolloutStrategyCanary(invalidRo, field.NewPath(""))
-		assert.Equal(t, InvalidSetWeightMessage, allErrs[0].Detail)
+		assert.Equal(t, fmt.Sprintf(InvalidSetWeightMessage, 100), allErrs[0].Detail)
 	})
 
 	t.Run("invalid duration set in paused step", func(t *testing.T) {

pkg/kubectl-argo-rollouts/info/rollout_info.go

@@ -14,6 +14,7 @@ import (
 	"github.com/argoproj/argo-rollouts/utils/defaults"
 	replicasetutil "github.com/argoproj/argo-rollouts/utils/replicaset"
 	rolloututil "github.com/argoproj/argo-rollouts/utils/rollout"
+	"github.com/argoproj/argo-rollouts/utils/weightutil"
 )
 
 func NewRolloutInfo(
@@ -58,12 +59,12 @@ func NewRolloutInfo(
 		currentStep, _ := replicasetutil.GetCurrentCanaryStep(ro)
 
 		if currentStep == nil {
-			roInfo.ActualWeight = "100"
+			roInfo.ActualWeight = fmt.Sprintf("%d", weightutil.MaxTrafficWeight(ro))
 		} else if ro.Status.AvailableReplicas > 0 {
 			if ro.Spec.Strategy.Canary.TrafficRouting == nil {
 				for _, rs := range roInfo.ReplicaSets {
 					if rs.Canary {
-						roInfo.ActualWeight = fmt.Sprintf("%d", (rs.Available*100)/ro.Status.AvailableReplicas)
+						roInfo.ActualWeight = fmt.Sprintf("%d", (rs.Available*weightutil.MaxTrafficWeight(ro))/ro.Status.AvailableReplicas)
 					}
 				}
 			} else {

rollout/trafficrouting.go

@@ -26,6 +26,7 @@ import (
 	"github.com/argoproj/argo-rollouts/utils/record"
 	replicasetutil "github.com/argoproj/argo-rollouts/utils/replicaset"
 	rolloututil "github.com/argoproj/argo-rollouts/utils/rollout"
+	"github.com/argoproj/argo-rollouts/utils/weightutil"
 )
 
 // NewTrafficRoutingReconciler identifies return the TrafficRouting Plugin that the rollout wants to modify
@@ -132,6 +133,7 @@ func (c *Controller) NewTrafficRoutingReconciler(roCtx *rolloutContext) ([]traff
 	return nil, nil
 }
 
+// this currently only be used in the canary strategy
 func (c *rolloutContext) reconcileTrafficRouting() error {
 	reconcilers, err := c.newTrafficRoutingReconciler(c)
 	// a return here does ensure that all trafficReconcilers are healthy
@@ -199,7 +201,8 @@ func (c *rolloutContext) reconcileTrafficRouting() error {
 			// But we can only increase canary weight according to available replica counts of the canary.
 			// we will need to set the desiredWeight to 0 when the newRS is not available.
 			if c.rollout.Spec.Strategy.Canary.DynamicStableScale {
-				desiredWeight = (100 * c.newRS.Status.AvailableReplicas) / *c.rollout.Spec.Replicas
+				// TODO: handle total weight
+				desiredWeight = (weightutil.MaxTrafficWeight(c.rollout) * c.newRS.Status.AvailableReplicas) / *c.rollout.Spec.Replicas
 			} else if c.rollout.Status.Canary.Weights != nil {
 				desiredWeight = c.rollout.Status.Canary.Weights.Canary.Weight
 			}
@@ -227,7 +230,7 @@ func (c *rolloutContext) reconcileTrafficRouting() error {
 				desiredWeight = replicasetutil.GetCurrentSetWeight(c.rollout)
 				weightDestinations = append(weightDestinations, c.calculateWeightDestinationsFromExperiment()...)
 			} else {
-				desiredWeight = 100
+				desiredWeight = weightutil.MaxTrafficWeight(c.rollout)
 			}
 		}
 		// We need to check for revision > 1 because when we first install the rollout we run step 0 this prevents that.
@@ -301,7 +304,9 @@ func (c *rolloutContext) calculateDesiredWeightOnAbortOrStableRollback() int32 {
 	}
 	// When using dynamic stable scaling, we must dynamically decreasing the weight to the canary
 	// according to the availability of the stable (whatever it can support).
-	desiredWeight := 100 - ((100 * c.stableRS.Status.AvailableReplicas) / *c.rollout.Spec.Replicas)
+	// TODO: handle total weight
+	// c.rollout.Spec.Strategy.Canary.TrafficRouting.MaxTrafficWeight
+	desiredWeight := weightutil.MaxTrafficWeight(c.rollout) - ((weightutil.MaxTrafficWeight(c.rollout) * c.stableRS.Status.AvailableReplicas) / *c.rollout.Spec.Replicas)
 	if c.rollout.Status.Canary.Weights != nil {
 		// This ensures that if we are already at a lower weight, then we will not
 		// increase the weight because stable availability is flapping (e.g. pod restarts)
@@ -334,7 +339,8 @@ func calculateWeightStatus(ro *v1alpha1.Rollout, canaryHash, stableHash string,
 			ServiceName:     ro.Spec.Strategy.Canary.CanaryService,
 		},
 	}
-	stableWeight := 100 - desiredWeight
+	// TODO: handle total weight
+	stableWeight := weightutil.MaxTrafficWeight(ro) - desiredWeight
 	for _, weightDest := range weightDestinations {
 		weights.Additional = append(weights.Additional, weightDest)
 		stableWeight -= weightDest.Weight

rollout/trafficrouting/nginx/nginx.go

@@ -209,6 +209,10 @@ func (r *Reconciler) buildLegacyCanaryIngress(stableIngress *extensionsv1beta1.I
 	desiredCanaryIngress.Annotations[fmt.Sprintf("%s/canary", annotationPrefix)] = "true"
 	desiredCanaryIngress.Annotations[fmt.Sprintf("%s/canary-weight", annotationPrefix)] = fmt.Sprintf("%d", desiredWeight)
 
+	if r.cfg.Rollout.Spec.Strategy.Canary.TrafficRouting.MaxTrafficWeight != nil {
+		weightTotal := *r.cfg.Rollout.Spec.Strategy.Canary.TrafficRouting.MaxTrafficWeight
+		desiredCanaryIngress.Annotations[fmt.Sprintf("%s/canary-weight-total", annotationPrefix)] = fmt.Sprintf("%d", weightTotal)
+	}
 	return ingressutil.NewLegacyIngress(desiredCanaryIngress), nil
 }
 

utils/replicaset/canary.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/argoproj/argo-rollouts/pkg/apis/rollouts/v1alpha1"
 	"github.com/argoproj/argo-rollouts/utils/defaults"
+	"github.com/argoproj/argo-rollouts/utils/weightutil"
 )
 
 const (
@@ -56,11 +57,11 @@ func AtDesiredReplicaCountsForCanary(ro *v1alpha1.Rollout, newRS, stableRS *apps
 // when using the basic canary strategy. The function calculates the desired number of replicas for
 // the new and stable RS using the following equations:
 //
-// newRS Replica count = spec.Replica * (setweight / 100)
-// stableRS Replica count = spec.Replica * (1 - setweight / 100)
+// newRS Replica count = spec.Replica * (setweight / maxweight)
+// stableRS Replica count = spec.Replica * (1 - setweight / maxweight)
 //
 // In both equations, the function rounds the desired replica count up if the math does not divide into whole numbers
-// because the rollout guarantees at least one replica for both the stable and new RS when the setWeight is not 0 or 100.
+// because the rollout guarantees at least one replica for both the stable and new RS when the setWeight is not 0 or maxweight.
 // Then, the function finds the number of replicas it can scale up using the following equation:
 //
 // scaleUpCount := (maxSurge + rollout.Spec.Replica) - sum of rollout's RSs spec.Replica
@@ -91,8 +92,9 @@ func CalculateReplicaCountsForBasicCanary(rollout *v1alpha1.Rollout, newRS *apps
 	rolloutSpecReplica := defaults.GetReplicasOrDefault(rollout.Spec.Replicas)
 	_, desiredWeight := GetCanaryReplicasOrWeight(rollout)
 	maxSurge := MaxSurge(rollout)
+	maxWeight := weightutil.MaxTrafficWeight(rollout)
 
-	desiredNewRSReplicaCount, desiredStableRSReplicaCount := approximateWeightedCanaryStableReplicaCounts(rolloutSpecReplica, desiredWeight, maxSurge)
+	desiredNewRSReplicaCount, desiredStableRSReplicaCount := approximateWeightedCanaryStableReplicaCounts(rolloutSpecReplica, desiredWeight, maxWeight, maxSurge)
 
 	stableRSReplicaCount := int32(0)
 	newRSReplicaCount := int32(0)
@@ -180,7 +182,7 @@ func CalculateReplicaCountsForBasicCanary(rollout *v1alpha1.Rollout, newRS *apps
 // canary/stable replica counts might sum to either spec.replicas or spec.replicas + 1 but will not
 // exceed spec.replicas if maxSurge is 0. If the canary weight is between 1-99, and spec.replicas is > 1,
 // we will always return a minimum of 1 for stable and canary as to not return 0.
-func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, maxSurge int32) (int32, int32) {
+func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, maxWeight, maxSurge int32) (int32, int32) {
 	if specReplicas == 0 {
 		return 0, 0
 	}
@@ -192,14 +194,14 @@ func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, m
 	}
 	var options []canaryOption
 
-	ceilWeightedCanaryCount := int32(math.Ceil(float64(specReplicas*desiredWeight) / 100.0))
-	floorWeightedCanaryCount := int32(math.Floor(float64(specReplicas*desiredWeight) / 100.0))
+	ceilWeightedCanaryCount := int32(math.Ceil(float64(specReplicas*desiredWeight) / float64(maxWeight)))
+	floorWeightedCanaryCount := int32(math.Floor(float64(specReplicas*desiredWeight) / float64(maxWeight)))
 
-	tied := floorCeilingTied(desiredWeight, specReplicas)
+	tied := floorCeilingTied(desiredWeight, maxWeight, specReplicas)
 
 	// zeroAllowed indicates if are allowed to return the floored value if it is zero. We don't allow
 	// the value to be zero if when user has a weight from 1-99, and they run 2+ replicas (surge included)
-	zeroAllowed := desiredWeight == 100 || desiredWeight == 0 || (specReplicas == 1 && maxSurge == 0)
+	zeroAllowed := desiredWeight == (maxWeight) || desiredWeight == 0 || (specReplicas == 1 && maxSurge == 0)
 
 	if ceilWeightedCanaryCount < specReplicas || zeroAllowed {
 		options = append(options, canaryOption{ceilWeightedCanaryCount, specReplicas})
@@ -213,7 +215,7 @@ func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, m
 	// in order to achieve a closer canary weight
 	if maxSurge > 0 {
 		options = append(options, canaryOption{ceilWeightedCanaryCount, specReplicas + 1})
-		surgeIsTied := floorCeilingTied(desiredWeight, specReplicas+1)
+		surgeIsTied := floorCeilingTied(desiredWeight, maxWeight, specReplicas+1)
 		if !surgeIsTied && (floorWeightedCanaryCount != 0 || zeroAllowed) {
 			options = append(options, canaryOption{floorWeightedCanaryCount, specReplicas + 1})
 		}
@@ -225,10 +227,10 @@ func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, m
 	}
 
 	bestOption := options[0]
-	bestDelta := weightDelta(desiredWeight, bestOption.canary, bestOption.total)
+	bestDelta := weightDelta(desiredWeight, maxWeight, bestOption.canary, bestOption.total)
 	for i := 1; i < len(options); i++ {
 		currOption := options[i]
-		currDelta := weightDelta(desiredWeight, currOption.canary, currOption.total)
+		currDelta := weightDelta(desiredWeight, maxWeight, currOption.canary, currOption.total)
 		if currDelta < bestDelta {
 			bestOption = currOption
 			bestDelta = currDelta
@@ -241,15 +243,15 @@ func approximateWeightedCanaryStableReplicaCounts(specReplicas, desiredWeight, m
 // For example: replicas: 3, desiredWeight: 50%
 // A canary count of 1 (33.33%) or 2 (66.66%) are both equidistant from desired weight of 50%.
 // When this happens, we will pick the larger canary count
-func floorCeilingTied(desiredWeight, totalReplicas int32) bool {
-	_, frac := math.Modf(float64(totalReplicas) * (float64(desiredWeight) / 100))
+func floorCeilingTied(desiredWeight, maxWeight, totalReplicas int32) bool {
+	_, frac := math.Modf(float64(totalReplicas) * (float64(desiredWeight) / float64(maxWeight)))
 	return frac == 0.5
 }
 
 // weightDelta calculates the difference that the canary replicas will be from the desired weight
 // This is used to pick the closest approximation of canary counts.
-func weightDelta(desiredWeight, canaryReplicas, totalReplicas int32) float64 {
-	actualWeight := float64(canaryReplicas*100) / float64(totalReplicas)
+func weightDelta(desiredWeight, maxWeight, canaryReplicas, totalReplicas int32) float64 {
+	actualWeight := float64(canaryReplicas*maxWeight) / float64(totalReplicas)
 	return math.Abs(actualWeight - float64(desiredWeight))
 }
 
@@ -337,11 +339,12 @@ func CalculateReplicaCountsForTrafficRoutedCanary(rollout *v1alpha1.Rollout, wei
 	var canaryCount, stableCount int32
 	rolloutSpecReplica := defaults.GetReplicasOrDefault(rollout.Spec.Replicas)
 	setCanaryScaleReplicas, desiredWeight := GetCanaryReplicasOrWeight(rollout)
+	maxWeight := weightutil.MaxTrafficWeight(rollout)
 	if setCanaryScaleReplicas != nil {
 		// a canary count was explicitly set
 		canaryCount = *setCanaryScaleReplicas
 	} else {
-		canaryCount = CheckMinPodsPerReplicaSet(rollout, trafficWeightToReplicas(rolloutSpecReplica, desiredWeight))
+		canaryCount = CheckMinPodsPerReplicaSet(rollout, trafficWeightToReplicas(rolloutSpecReplica, desiredWeight, maxWeight))
 	}
 
 	if !rollout.Spec.Strategy.Canary.DynamicStableScale {
@@ -357,9 +360,10 @@ func CalculateReplicaCountsForTrafficRoutedCanary(rollout *v1alpha1.Rollout, wei
 	// high, until we reduce traffic to it.
 	// Case 2 occurs when we are going from high to low canary weight. In this scenario,
 	// we need to increase the stable scale in preparation for increase of traffic to stable.
-	stableCount = trafficWeightToReplicas(rolloutSpecReplica, 100-desiredWeight)
+	// TODO calculate the replica set count from the max traffic weight.
+	stableCount = trafficWeightToReplicas(rolloutSpecReplica, maxWeight-desiredWeight, maxWeight)
 	if weights != nil {
-		actualStableWeightReplicaCount := trafficWeightToReplicas(rolloutSpecReplica, weights.Stable.Weight)
+		actualStableWeightReplicaCount := trafficWeightToReplicas(rolloutSpecReplica, weights.Stable.Weight, maxWeight)
 		stableCount = max(stableCount, actualStableWeightReplicaCount)
 
 		if rollout.Status.Abort {
@@ -368,7 +372,7 @@ func CalculateReplicaCountsForTrafficRoutedCanary(rollout *v1alpha1.Rollout, wei
 			//  1. actual canary traffic weight
 			//  2. desired canary traffic weight
 			// This if block makes sure we don't scale down the canary prematurely
-			trafficWeightReplicaCount := trafficWeightToReplicas(rolloutSpecReplica, weights.Canary.Weight)
+			trafficWeightReplicaCount := trafficWeightToReplicas(rolloutSpecReplica, weights.Canary.Weight, maxWeight)
 			canaryCount = max(trafficWeightReplicaCount, canaryCount)
 		}
 	}
@@ -377,8 +381,8 @@ func CalculateReplicaCountsForTrafficRoutedCanary(rollout *v1alpha1.Rollout, wei
 
 // trafficWeightToReplicas returns the appropriate replicas given the full spec.replicas and a weight
 // Rounds up if not evenly divisible.
-func trafficWeightToReplicas(replicas, weight int32) int32 {
-	return int32(math.Ceil(float64(weight*replicas) / 100))
+func trafficWeightToReplicas(replicas, weight, maxWeight int32) int32 {
+	return int32(math.Ceil(float64(weight*replicas) / float64(maxWeight)))
 }
 
 func max(left, right int32) int32 {
@@ -459,7 +463,7 @@ func GetCurrentCanaryStep(rollout *v1alpha1.Rollout) (*v1alpha1.CanaryStep, *int
 // GetCanaryReplicasOrWeight either returns a static set of replicas or a weight percentage
 func GetCanaryReplicasOrWeight(rollout *v1alpha1.Rollout) (*int32, int32) {
 	if rollout.Status.PromoteFull || rollout.Status.StableRS == "" || rollout.Status.CurrentPodHash == rollout.Status.StableRS {
-		return nil, 100
+		return nil, weightutil.MaxTrafficWeight(rollout)
 	}
 	if scs := UseSetCanaryScale(rollout); scs != nil {
 		if scs.Replicas != nil {
@@ -480,7 +484,7 @@ func GetCurrentSetWeight(rollout *v1alpha1.Rollout) int32 {
 	}
 	currentStep, currentStepIndex := GetCurrentCanaryStep(rollout)
 	if currentStep == nil {
-		return 100
+		return weightutil.MaxTrafficWeight(rollout)
 	}
 
 	for i := *currentStepIndex; i >= 0; i-- {