add api changes for making mirrorPercentage configurable

artifacts/flagger/crd.yaml

@@ -528,6 +528,9 @@ spec:
                 mirror:
                   description: Mirror traffic to canary
                   type: boolean
+                mirrorWeight:
+                  description: Weight of traffic to be mirrored when
+                  type: number
                 match:
                   description: A/B testing match conditions
                   type: array

charts/flagger/crds/crd.yaml

@@ -528,6 +528,9 @@ spec:
                 mirror:
                   description: Mirror traffic to canary
                   type: boolean
+                mirrorWeight:
+                  description: Weight of traffic to be mirrored when
+                  type: number
                 match:
                   description: A/B testing match conditions
                   type: array

kustomize/base/flagger/crd.yaml

@@ -528,6 +528,9 @@ spec:
                 mirror:
                   description: Mirror traffic to canary
                   type: boolean
+                mirrorWeight:
+                  description: Weight of traffic to be mirrored when
+                  type: number
                 match:
                   description: A/B testing match conditions
                   type: array

pkg/apis/flagger/v1beta1/canary.go

@@ -175,10 +175,14 @@ type CanaryAnalysis struct {
 	// +optional
 	Iterations int `json:"iterations,omitempty"`
 
-	//Enable traffic mirroring for Blue/Green
+	// Enable traffic mirroring for Blue/Green
 	// +optional
 	Mirror bool `json:"mirror,omitempty"`
 
+	// Percentage of the traffic to be mirrored  when mirroring is enabled
+	// +optional
+	MirrorWeight float64 `json:"mirror_weight,omitempty"`
+
 	// Max traffic percentage routed to canary
 	// +optional
 	MaxWeight int `json:"maxWeight,omitempty"`

pkg/apis/istio/v1alpha3/virtual_service.go

@@ -325,6 +325,11 @@ type HTTPRoute struct {
 	// destination.
 	Mirror *Destination `json:"mirror,omitempty"`
 
+	// Percentage of the traffic to be mirrored by the `mirror` field.
+	// If this field is absent, all the traffic (100%) will be mirrored.
+	// Max value is 100.
+	MirrorPercentage *Percent `json:"mirror_percentage"`
+
 	// Cross-Origin Resource Sharing policy (CORS). Refer to
 	// https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
 	// for further details about cross origin resource sharing.
@@ -334,6 +339,11 @@ type HTTPRoute struct {
 	Headers *Headers `json:"headers,omitempty"`
 }
 
+// Percent specifies a percentage in the range of [0.0, 100.0].
+type Percent struct {
+	Value float64 `json:"value,omitempty"`
+}
+
 // Header manipulation rules
 type Headers struct {
 	// Header manipulation rules to apply before forwarding a request

pkg/apis/istio/v1alpha3/zz_generated.deepcopy.go

@@ -421,6 +421,11 @@ func (in *HTTPRoute) DeepCopyInto(out *HTTPRoute) {
 		*out = new(Destination)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.MirrorPercentage != nil {
+		in, out := &in.MirrorPercentage, &out.MirrorPercentage
+		*out = new(Percent)
+		**out = **in
+	}
 	if in.CorsPolicy != nil {
 		in, out := &in.CorsPolicy, &out.CorsPolicy
 		*out = new(CorsPolicy)
@@ -628,6 +633,22 @@ func (in *OutlierDetection) DeepCopy() *OutlierDetection {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Percent) DeepCopyInto(out *Percent) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Percent.
+func (in *Percent) DeepCopy() *Percent {
+	if in == nil {
+		return nil
+	}
+	out := new(Percent)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *PortSelector) DeepCopyInto(out *PortSelector) {
 	*out = *in