Repository: fluxcd/flagger
Pull request #896 (2021-04-28 16:28:21)

Implement SMI v1alpha3 router
This PR adds support for SMI TrafficSplit v1alpha3.

For service mesh providers that require this version set:

```yaml
apiVersion: flagger.app/v1beta1
kind: Canary
metadata:
  name: my-canary
spec:
  provider: "smi:v1alpha3"
```

Note that for SMI compatible service mesh solutions like Open Service Mesh, Consul Connect or Nginx Service Mesh,
[Prometheus MetricTemplates](https://docs.flagger.app/usage/metrics#prometheus) can be used to implement the request success rate and request duration checks.

Fix: #551


Patch:
diff --git a/README.md b/README.md
index ccb26e60..b80da6b1 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ metadata:
 spec:
   # service mesh provider (optional)
   # can be: kubernetes, istio, linkerd, appmesh, nginx, skipper, contour, gloo, supergloo, traefik
+  # for SMI TrafficSplit can be: smi:v1alpha1, smi:v1alpha2, smi:v1alpha3
   provider: istio
   # deployment reference
   targetRef:
@@ -192,17 +193,21 @@ For more details on how the canary analysis and promotion works please [read the
 
 **Service Mesh**
 
-| Feature                                    | App Mesh           | Istio              | Linkerd            |  Kubernetes CNI    |
-| ------------------------------------------ | ------------------ | ------------------ | ------------------ |  ----------------- |
-| Canary deployments (weighted traffic)      | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
-| A/B testing (headers and cookies routing)  | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
-| Blue/Green deployments (traffic switch)    | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
-| Blue/Green deployments (traffic mirroring) | :heavy_minus_sign: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
-| Webhooks (acceptance/load testing)         | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
-| Manual gating (approve/pause/resume)       | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
-| Request success rate check (L7 metric)     | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
-| Request duration check (L7 metric)         | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
-| Custom metric checks                       | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| Feature                                    | App Mesh           | Istio              | Linkerd            |  SMI               |  Kubernetes CNI    |
+| ------------------------------------------ | ------------------ | ------------------ | ------------------ |  ----------------- |  ----------------- |
+| Canary deployments (weighted traffic)      | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: |
+| A/B testing (headers and cookies routing)  | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
+| Blue/Green deployments (traffic switch)    | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| Blue/Green deployments (traffic mirroring) | :heavy_minus_sign: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: | :heavy_minus_sign: |
+| Webhooks (acceptance/load testing)         | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| Manual gating (approve/pause/resume)       | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| Request success rate check (L7 metric)     | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
+| Request duration check (L7 metric)         | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_minus_sign: | :heavy_minus_sign: |
+| Custom metric checks                       | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+
+For SMI compatible service mesh solutions like Open Service Mesh, Consul Connect or Nginx Service Mesh,
+[Prometheus MetricTemplates](https://docs.flagger.app/usage/metrics#prometheus) can be used to implement
+the request success rate and request duration checks.
 
 **Ingress**
 
@@ -229,7 +234,6 @@ For more details on how the canary analysis and promotion works please [read the
 #### Integrations
 
 * Add support for Kubernetes [Ingress v2](https://github.com/kubernetes-sigs/service-apis)
-* Add support for SMI compatible service mesh solutions like Open Service Mesh and Consul Connect
 * Add support for ingress controllers like HAProxy and ALB
 * Add support for metrics providers like InfluxDB, Stackdriver, SignalFX
 
diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index 03e07b5e..ac79a814 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -30,7 +30,7 @@ chmod +x ${CODEGEN_PKG}/generate-groups.sh
 
 ${CODEGEN_PKG}/generate-groups.sh all \
     github.com/fluxcd/flagger/pkg/client github.com/fluxcd/flagger/pkg/apis \
-    "flagger:v1beta1 appmesh:v1beta2 appmesh:v1beta1 istio:v1alpha3 smi:v1alpha1 smi:v1alpha2 gloo:v1 projectcontour:v1 traefik:v1alpha1" \
+    "flagger:v1beta1 appmesh:v1beta2 appmesh:v1beta1 istio:v1alpha3 smi:v1alpha1 smi:v1alpha2 smi:v1alpha3 gloo:v1 projectcontour:v1 traefik:v1alpha1" \
     --output-base "${TEMP_DIR}" \
     --go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
 
diff --git a/kustomize/base/flagger/crd.yaml b/kustomize/base/flagger/crd.yaml
index abd1f4a8..3aeaa433 100644
--- a/kustomize/base/flagger/crd.yaml
+++ b/kustomize/base/flagger/crd.yaml
@@ -940,6 +940,10 @@ spec:
                               - post-rollout
                               - event
                               - rollback
+                              - confirm-traffic-increase
+                          muteAlert:
+                            description: Mute all alerts for the webhook
+                            type: boolean
                           url:
                             description: URL address of this webhook
                             type: string
diff --git a/pkg/apis/smi/v1alpha3/doc.go b/pkg/apis/smi/v1alpha3/doc.go
new file mode 100644
index 00000000..dd5d1aba
--- /dev/null
+++ b/pkg/apis/smi/v1alpha3/doc.go
@@ -0,0 +1,4 @@
+// +k8s:deepcopy-gen=package
+// +groupName=split.smi-spec.io
+
+package v1alpha3
diff --git a/pkg/apis/smi/v1alpha3/register.go b/pkg/apis/smi/v1alpha3/register.go
new file mode 100644
index 00000000..cc9ddfeb
--- /dev/null
+++ b/pkg/apis/smi/v1alpha3/register.go
@@ -0,0 +1,48 @@
+package v1alpha3
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	ts "github.com/fluxcd/flagger/pkg/apis/smi"
+)
+
+// SchemeGroupVersion is the identifier for the API which includes
+// the name of the group and the version of the API
+var SchemeGroupVersion = schema.GroupVersion{
+	Group:   ts.GroupName,
+	Version: "v1alpha3",
+}
+
+// Kind takes an unqualified kind and returns back a Group qualified GroupKind
+func Kind(kind string) schema.GroupKind {
+	return SchemeGroupVersion.WithKind(kind).GroupKind()
+}
+
+// Resource takes an unqualified resource and returns a Group qualified GroupResource
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+var (
+	// SchemeBuilder collects functions that add things to a scheme. It's to allow
+	// code to compile without explicitly referencing generated types. You should
+	// declare one in each package that will have generated deep copy or conversion
+	// functions.
+	SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
+
+	// AddToScheme applies all the stored functions to the scheme. A non-nil error
+	// indicates that one function failed and the attempt was abandoned.
+	AddToScheme = SchemeBuilder.AddToScheme
+)
+
+// Adds the list of known types to Scheme.
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&TrafficSplit{},
+		&TrafficSplitList{},
+	)
+	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}
diff --git a/pkg/apis/smi/v1alpha3/traffic_split.go b/pkg/apis/smi/v1alpha3/traffic_split.go
new file mode 100644
index 00000000..6d09faeb
--- /dev/null
+++ b/pkg/apis/smi/v1alpha3/traffic_split.go
@@ -0,0 +1,60 @@
+package v1alpha3
+
+import (
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// +genclient
+// +genclient:noStatus
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// TrafficSplit allows users to incrementally direct percentages of traffic
+// between various services. It will be used by clients such as ingress
+// controllers or service mesh sidecars to split the outgoing traffic to
+// different destinations.
+type TrafficSplit struct {
+	metav1.TypeMeta `json:",inline"`
+	// Standard object's metadata.
+	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
+	// +optional
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	// Specification of the desired behavior of the traffic split.
+	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status
+	// +optional
+	Spec TrafficSplitSpec `json:"spec,omitempty"`
+}
+
+// TrafficSplitSpec is the specification for a TrafficSplit
+type TrafficSplitSpec struct {
+	// Service represents the apex service
+	Service string `json:"service"`
+
+	// Backends defines a list of Kubernetes services
+	// used as the traffic split destination
+	Backends []TrafficSplitBackend `json:"backends"`
+
+	// Matches allows defining a list of HTTP route groups
+	// that this traffic split object should match
+	// +optional
+	Matches []corev1.TypedLocalObjectReference `json:"matches,omitempty"`
+}
+
+// TrafficSplitBackend defines a backend
+type TrafficSplitBackend struct {
+	// Service is the name of a Kubernetes service
+	Service string `json:"service"`
+
+	// Weight defines the traffic split percentage
+	Weight int `json:"weight"`
+}
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+type TrafficSplitList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata"`
+
+	Items []TrafficSplit `json:"items"`
+}
diff --git a/pkg/apis/smi/v1alpha3/zz_generated.deepcopy.go b/pkg/apis/smi/v1alpha3/zz_generated.deepcopy.go
new file mode 100644
index 00000000..0a1807ec
--- /dev/null
+++ b/pkg/apis/smi/v1alpha3/zz_generated.deepcopy.go
@@ -0,0 +1,130 @@
+// +build !ignore_autogenerated
+
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by deepcopy-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	v1 "k8s.io/api/core/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TrafficSplit) DeepCopyInto(out *TrafficSplit) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	in.Spec.DeepCopyInto(&out.Spec)
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TrafficSplit.
+func (in *TrafficSplit) DeepCopy() *TrafficSplit {
+	if in == nil {
+		return nil
+	}
+	out := new(TrafficSplit)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TrafficSplit) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TrafficSplitBackend) DeepCopyInto(out *TrafficSplitBackend) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TrafficSplitBackend.
+func (in *TrafficSplitBackend) DeepCopy() *TrafficSplitBackend {
+	if in == nil {
+		return nil
+	}
+	out := new(TrafficSplitBackend)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TrafficSplitList) DeepCopyInto(out *TrafficSplitList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ListMeta.DeepCopyInto(&out.ListMeta)
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]TrafficSplit, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TrafficSplitList.
+func (in *TrafficSplitList) DeepCopy() *TrafficSplitList {
+	if in == nil {
+		return nil
+	}
+	out := new(TrafficSplitList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TrafficSplitList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TrafficSplitSpec) DeepCopyInto(out *TrafficSplitSpec) {
+	*out = *in
+	if in.Backends != nil {
+		in, out := &in.Backends, &out.Backends
+		*out = make([]TrafficSplitBackend, len(*in))
+		copy(*out, *in)
+	}
+	if in.Matches != nil {
+		in, out := &in.Matches, &out.Matches
+		*out = make([]v1.TypedLocalObjectReference, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TrafficSplitSpec.
+func (in *TrafficSplitSpec) DeepCopy() *TrafficSplitSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(TrafficSplitSpec)
+	in.DeepCopyInto(out)
+	return out
+}
diff --git a/pkg/client/clientset/versioned/clientset.go b/pkg/client/clientset/versioned/clientset.go
index 4ec16141..b86e6563 100644
--- a/pkg/client/clientset/versioned/clientset.go
+++ b/pkg/client/clientset/versioned/clientset.go
@@ -29,6 +29,7 @@ import (
 	projectcontourv1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/projectcontour/v1"
 	splitv1alpha1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha1"
 	splitv1alpha2 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha2"
+	splitv1alpha3 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha3"
 	traefikv1alpha1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/traefik/v1alpha1"
 	discovery "k8s.io/client-go/discovery"
 	rest "k8s.io/client-go/rest"
@@ -45,6 +46,7 @@ type Interface interface {
 	ProjectcontourV1() projectcontourv1.ProjectcontourV1Interface
 	SplitV1alpha1() splitv1alpha1.SplitV1alpha1Interface
 	SplitV1alpha2() splitv1alpha2.SplitV1alpha2Interface
+	SplitV1alpha3() splitv1alpha3.SplitV1alpha3Interface
 	TraefikV1alpha1() traefikv1alpha1.TraefikV1alpha1Interface
 }
 
@@ -60,6 +62,7 @@ type Clientset struct {
 	projectcontourV1   *projectcontourv1.ProjectcontourV1Client
 	splitV1alpha1      *splitv1alpha1.SplitV1alpha1Client
 	splitV1alpha2      *splitv1alpha2.SplitV1alpha2Client
+	splitV1alpha3      *splitv1alpha3.SplitV1alpha3Client
 	traefikV1alpha1    *traefikv1alpha1.TraefikV1alpha1Client
 }
 
@@ -103,6 +106,11 @@ func (c *Clientset) SplitV1alpha2() splitv1alpha2.SplitV1alpha2Interface {
 	return c.splitV1alpha2
 }
 
+// SplitV1alpha3 retrieves the SplitV1alpha3Client
+func (c *Clientset) SplitV1alpha3() splitv1alpha3.SplitV1alpha3Interface {
+	return c.splitV1alpha3
+}
+
 // TraefikV1alpha1 retrieves the TraefikV1alpha1Client
 func (c *Clientset) TraefikV1alpha1() traefikv1alpha1.TraefikV1alpha1Interface {
 	return c.traefikV1alpha1
@@ -161,6 +169,10 @@ func NewForConfig(c *rest.Config) (*Clientset, error) {
 	if err != nil {
 		return nil, err
 	}
+	cs.splitV1alpha3, err = splitv1alpha3.NewForConfig(&configShallowCopy)
+	if err != nil {
+		return nil, err
+	}
 	cs.traefikV1alpha1, err = traefikv1alpha1.NewForConfig(&configShallowCopy)
 	if err != nil {
 		return nil, err
@@ -185,6 +197,7 @@ func NewForConfigOrDie(c *rest.Config) *Clientset {
 	cs.projectcontourV1 = projectcontourv1.NewForConfigOrDie(c)
 	cs.splitV1alpha1 = splitv1alpha1.NewForConfigOrDie(c)
 	cs.splitV1alpha2 = splitv1alpha2.NewForConfigOrDie(c)
+	cs.splitV1alpha3 = splitv1alpha3.NewForConfigOrDie(c)
 	cs.traefikV1alpha1 = traefikv1alpha1.NewForConfigOrDie(c)
 
 	cs.DiscoveryClient = discovery.NewDiscoveryClientForConfigOrDie(c)
@@ -202,6 +215,7 @@ func New(c rest.Interface) *Clientset {
 	cs.projectcontourV1 = projectcontourv1.New(c)
 	cs.splitV1alpha1 = splitv1alpha1.New(c)
 	cs.splitV1alpha2 = splitv1alpha2.New(c)
+	cs.splitV1alpha3 = splitv1alpha3.New(c)
 	cs.traefikV1alpha1 = traefikv1alpha1.New(c)
 
 	cs.DiscoveryClient = discovery.NewDiscoveryClient(c)
diff --git a/pkg/client/clientset/versioned/fake/clientset_generated.go b/pkg/client/clientset/versioned/fake/clientset_generated.go
index 2edd507e..c53b64fc 100644
--- a/pkg/client/clientset/versioned/fake/clientset_generated.go
+++ b/pkg/client/clientset/versioned/fake/clientset_generated.go
@@ -36,6 +36,8 @@ import (
 	fakesplitv1alpha1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha1/fake"
 	splitv1alpha2 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha2"
 	fakesplitv1alpha2 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha2/fake"
+	splitv1alpha3 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha3"
+	fakesplitv1alpha3 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake"
 	traefikv1alpha1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/traefik/v1alpha1"
 	faketraefikv1alpha1 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/traefik/v1alpha1/fake"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -132,6 +134,11 @@ func (c *Clientset) SplitV1alpha2() splitv1alpha2.SplitV1alpha2Interface {
 	return &fakesplitv1alpha2.FakeSplitV1alpha2{Fake: &c.Fake}
 }
 
+// SplitV1alpha3 retrieves the SplitV1alpha3Client
+func (c *Clientset) SplitV1alpha3() splitv1alpha3.SplitV1alpha3Interface {
+	return &fakesplitv1alpha3.FakeSplitV1alpha3{Fake: &c.Fake}
+}
+
 // TraefikV1alpha1 retrieves the TraefikV1alpha1Client
 func (c *Clientset) TraefikV1alpha1() traefikv1alpha1.TraefikV1alpha1Interface {
 	return &faketraefikv1alpha1.FakeTraefikV1alpha1{Fake: &c.Fake}
diff --git a/pkg/client/clientset/versioned/fake/register.go b/pkg/client/clientset/versioned/fake/register.go
index 4551c697..86e29d8f 100644
--- a/pkg/client/clientset/versioned/fake/register.go
+++ b/pkg/client/clientset/versioned/fake/register.go
@@ -27,6 +27,7 @@ import (
 	projectcontourv1 "github.com/fluxcd/flagger/pkg/apis/projectcontour/v1"
 	splitv1alpha1 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha1"
 	splitv1alpha2 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha2"
+	splitv1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
 	traefikv1alpha1 "github.com/fluxcd/flagger/pkg/apis/traefik/v1alpha1"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
@@ -47,6 +48,7 @@ var localSchemeBuilder = runtime.SchemeBuilder{
 	projectcontourv1.AddToScheme,
 	splitv1alpha1.AddToScheme,
 	splitv1alpha2.AddToScheme,
+	splitv1alpha3.AddToScheme,
 	traefikv1alpha1.AddToScheme,
 }
 
diff --git a/pkg/client/clientset/versioned/scheme/register.go b/pkg/client/clientset/versioned/scheme/register.go
index 069b7f0f..e8895e6b 100644
--- a/pkg/client/clientset/versioned/scheme/register.go
+++ b/pkg/client/clientset/versioned/scheme/register.go
@@ -27,6 +27,7 @@ import (
 	projectcontourv1 "github.com/fluxcd/flagger/pkg/apis/projectcontour/v1"
 	splitv1alpha1 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha1"
 	splitv1alpha2 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha2"
+	splitv1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
 	traefikv1alpha1 "github.com/fluxcd/flagger/pkg/apis/traefik/v1alpha1"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
@@ -47,6 +48,7 @@ var localSchemeBuilder = runtime.SchemeBuilder{
 	projectcontourv1.AddToScheme,
 	splitv1alpha1.AddToScheme,
 	splitv1alpha2.AddToScheme,
+	splitv1alpha3.AddToScheme,
 	traefikv1alpha1.AddToScheme,
 }
 
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/doc.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/doc.go
new file mode 100644
index 00000000..9e20709b
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/doc.go
@@ -0,0 +1,20 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+// This package has the automatically generated typed clients.
+package v1alpha3
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/doc.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/doc.go
new file mode 100644
index 00000000..1ccd9119
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/doc.go
@@ -0,0 +1,20 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+// Package fake has the automatically generated clients.
+package fake
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_smi_client.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_smi_client.go
new file mode 100644
index 00000000..5c8332c1
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_smi_client.go
@@ -0,0 +1,40 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	v1alpha3 "github.com/fluxcd/flagger/pkg/client/clientset/versioned/typed/smi/v1alpha3"
+	rest "k8s.io/client-go/rest"
+	testing "k8s.io/client-go/testing"
+)
+
+type FakeSplitV1alpha3 struct {
+	*testing.Fake
+}
+
+func (c *FakeSplitV1alpha3) TrafficSplits(namespace string) v1alpha3.TrafficSplitInterface {
+	return &FakeTrafficSplits{c, namespace}
+}
+
+// RESTClient returns a RESTClient that is used to communicate
+// with API server by this client implementation.
+func (c *FakeSplitV1alpha3) RESTClient() rest.Interface {
+	var ret *rest.RESTClient
+	return ret
+}
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_trafficsplit.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_trafficsplit.go
new file mode 100644
index 00000000..849de517
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/fake/fake_trafficsplit.go
@@ -0,0 +1,130 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	"context"
+
+	v1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	labels "k8s.io/apimachinery/pkg/labels"
+	schema "k8s.io/apimachinery/pkg/runtime/schema"
+	types "k8s.io/apimachinery/pkg/types"
+	watch "k8s.io/apimachinery/pkg/watch"
+	testing "k8s.io/client-go/testing"
+)
+
+// FakeTrafficSplits implements TrafficSplitInterface
+type FakeTrafficSplits struct {
+	Fake *FakeSplitV1alpha3
+	ns   string
+}
+
+var trafficsplitsResource = schema.GroupVersionResource{Group: "split.smi-spec.io", Version: "v1alpha3", Resource: "trafficsplits"}
+
+var trafficsplitsKind = schema.GroupVersionKind{Group: "split.smi-spec.io", Version: "v1alpha3", Kind: "TrafficSplit"}
+
+// Get takes name of the trafficSplit, and returns the corresponding trafficSplit object, and an error if there is any.
+func (c *FakeTrafficSplits) Get(ctx context.Context, name string, options v1.GetOptions) (result *v1alpha3.TrafficSplit, err error) {
+	obj, err := c.Fake.
+		Invokes(testing.NewGetAction(trafficsplitsResource, c.ns, name), &v1alpha3.TrafficSplit{})
+
+	if obj == nil {
+		return nil, err
+	}
+	return obj.(*v1alpha3.TrafficSplit), err
+}
+
+// List takes label and field selectors, and returns the list of TrafficSplits that match those selectors.
+func (c *FakeTrafficSplits) List(ctx context.Context, opts v1.ListOptions) (result *v1alpha3.TrafficSplitList, err error) {
+	obj, err := c.Fake.
+		Invokes(testing.NewListAction(trafficsplitsResource, trafficsplitsKind, c.ns, opts), &v1alpha3.TrafficSplitList{})
+
+	if obj == nil {
+		return nil, err
+	}
+
+	label, _, _ := testing.ExtractFromListOptions(opts)
+	if label == nil {
+		label = labels.Everything()
+	}
+	list := &v1alpha3.TrafficSplitList{ListMeta: obj.(*v1alpha3.TrafficSplitList).ListMeta}
+	for _, item := range obj.(*v1alpha3.TrafficSplitList).Items {
+		if label.Matches(labels.Set(item.Labels)) {
+			list.Items = append(list.Items, item)
+		}
+	}
+	return list, err
+}
+
+// Watch returns a watch.Interface that watches the requested trafficSplits.
+func (c *FakeTrafficSplits) Watch(ctx context.Context, opts v1.ListOptions) (watch.Interface, error) {
+	return c.Fake.
+		InvokesWatch(testing.NewWatchAction(trafficsplitsResource, c.ns, opts))
+
+}
+
+// Create takes the representation of a trafficSplit and creates it.  Returns the server's representation of the trafficSplit, and an error, if there is any.
+func (c *FakeTrafficSplits) Create(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.CreateOptions) (result *v1alpha3.TrafficSplit, err error) {
+	obj, err := c.Fake.
+		Invokes(testing.NewCreateAction(trafficsplitsResource, c.ns, trafficSplit), &v1alpha3.TrafficSplit{})
+
+	if obj == nil {
+		return nil, err
+	}
+	return obj.(*v1alpha3.TrafficSplit), err
+}
+
+// Update takes the representation of a trafficSplit and updates it. Returns the server's representation of the trafficSplit, and an error, if there is any.
+func (c *FakeTrafficSplits) Update(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.UpdateOptions) (result *v1alpha3.TrafficSplit, err error) {
+	obj, err := c.Fake.
+		Invokes(testing.NewUpdateAction(trafficsplitsResource, c.ns, trafficSplit), &v1alpha3.TrafficSplit{})
+
+	if obj == nil {
+		return nil, err
+	}
+	return obj.(*v1alpha3.TrafficSplit), err
+}
+
+// Delete takes name of the trafficSplit and deletes it. Returns an error if one occurs.
+func (c *FakeTrafficSplits) Delete(ctx context.Context, name string, opts v1.DeleteOptions) error {
+	_, err := c.Fake.
+		Invokes(testing.NewDeleteAction(trafficsplitsResource, c.ns, name), &v1alpha3.TrafficSplit{})
+
+	return err
+}
+
+// DeleteCollection deletes a collection of objects.
+func (c *FakeTrafficSplits) DeleteCollection(ctx context.Context, opts v1.DeleteOptions, listOpts v1.ListOptions) error {
+	action := testing.NewDeleteCollectionAction(trafficsplitsResource, c.ns, listOpts)
+
+	_, err := c.Fake.Invokes(action, &v1alpha3.TrafficSplitList{})
+	return err
+}
+
+// Patch applies the patch and returns the patched trafficSplit.
+func (c *FakeTrafficSplits) Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts v1.PatchOptions, subresources ...string) (result *v1alpha3.TrafficSplit, err error) {
+	obj, err := c.Fake.
+		Invokes(testing.NewPatchSubresourceAction(trafficsplitsResource, c.ns, name, pt, data, subresources...), &v1alpha3.TrafficSplit{})
+
+	if obj == nil {
+		return nil, err
+	}
+	return obj.(*v1alpha3.TrafficSplit), err
+}
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/generated_expansion.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/generated_expansion.go
new file mode 100644
index 00000000..ee4a638e
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/generated_expansion.go
@@ -0,0 +1,21 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+package v1alpha3
+
+type TrafficSplitExpansion interface{}
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/smi_client.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/smi_client.go
new file mode 100644
index 00000000..87f75155
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/smi_client.go
@@ -0,0 +1,89 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	v1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	"github.com/fluxcd/flagger/pkg/client/clientset/versioned/scheme"
+	rest "k8s.io/client-go/rest"
+)
+
+type SplitV1alpha3Interface interface {
+	RESTClient() rest.Interface
+	TrafficSplitsGetter
+}
+
+// SplitV1alpha3Client is used to interact with features provided by the split.smi-spec.io group.
+type SplitV1alpha3Client struct {
+	restClient rest.Interface
+}
+
+func (c *SplitV1alpha3Client) TrafficSplits(namespace string) TrafficSplitInterface {
+	return newTrafficSplits(c, namespace)
+}
+
+// NewForConfig creates a new SplitV1alpha3Client for the given config.
+func NewForConfig(c *rest.Config) (*SplitV1alpha3Client, error) {
+	config := *c
+	if err := setConfigDefaults(&config); err != nil {
+		return nil, err
+	}
+	client, err := rest.RESTClientFor(&config)
+	if err != nil {
+		return nil, err
+	}
+	return &SplitV1alpha3Client{client}, nil
+}
+
+// NewForConfigOrDie creates a new SplitV1alpha3Client for the given config and
+// panics if there is an error in the config.
+func NewForConfigOrDie(c *rest.Config) *SplitV1alpha3Client {
+	client, err := NewForConfig(c)
+	if err != nil {
+		panic(err)
+	}
+	return client
+}
+
+// New creates a new SplitV1alpha3Client for the given RESTClient.
+func New(c rest.Interface) *SplitV1alpha3Client {
+	return &SplitV1alpha3Client{c}
+}
+
+func setConfigDefaults(config *rest.Config) error {
+	gv := v1alpha3.SchemeGroupVersion
+	config.GroupVersion = &gv
+	config.APIPath = "/apis"
+	config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
+
+	if config.UserAgent == "" {
+		config.UserAgent = rest.DefaultKubernetesUserAgent()
+	}
+
+	return nil
+}
+
+// RESTClient returns a RESTClient that is used to communicate
+// with API server by this client implementation.
+func (c *SplitV1alpha3Client) RESTClient() rest.Interface {
+	if c == nil {
+		return nil
+	}
+	return c.restClient
+}
diff --git a/pkg/client/clientset/versioned/typed/smi/v1alpha3/trafficsplit.go b/pkg/client/clientset/versioned/typed/smi/v1alpha3/trafficsplit.go
new file mode 100644
index 00000000..73bb996b
--- /dev/null
+++ b/pkg/client/clientset/versioned/typed/smi/v1alpha3/trafficsplit.go
@@ -0,0 +1,178 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by client-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	"context"
+	"time"
+
+	v1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	scheme "github.com/fluxcd/flagger/pkg/client/clientset/versioned/scheme"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	types "k8s.io/apimachinery/pkg/types"
+	watch "k8s.io/apimachinery/pkg/watch"
+	rest "k8s.io/client-go/rest"
+)
+
+// TrafficSplitsGetter has a method to return a TrafficSplitInterface.
+// A group's client should implement this interface.
+type TrafficSplitsGetter interface {
+	TrafficSplits(namespace string) TrafficSplitInterface
+}
+
+// TrafficSplitInterface has methods to work with TrafficSplit resources.
+type TrafficSplitInterface interface {
+	Create(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.CreateOptions) (*v1alpha3.TrafficSplit, error)
+	Update(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.UpdateOptions) (*v1alpha3.TrafficSplit, error)
+	Delete(ctx context.Context, name string, opts v1.DeleteOptions) error
+	DeleteCollection(ctx context.Context, opts v1.DeleteOptions, listOpts v1.ListOptions) error
+	Get(ctx context.Context, name string, opts v1.GetOptions) (*v1alpha3.TrafficSplit, error)
+	List(ctx context.Context, opts v1.ListOptions) (*v1alpha3.TrafficSplitList, error)
+	Watch(ctx context.Context, opts v1.ListOptions) (watch.Interface, error)
+	Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts v1.PatchOptions, subresources ...string) (result *v1alpha3.TrafficSplit, err error)
+	TrafficSplitExpansion
+}
+
+// trafficSplits implements TrafficSplitInterface
+type trafficSplits struct {
+	client rest.Interface
+	ns     string
+}
+
+// newTrafficSplits returns a TrafficSplits
+func newTrafficSplits(c *SplitV1alpha3Client, namespace string) *trafficSplits {
+	return &trafficSplits{
+		client: c.RESTClient(),
+		ns:     namespace,
+	}
+}
+
+// Get takes name of the trafficSplit, and returns the corresponding trafficSplit object, and an error if there is any.
+func (c *trafficSplits) Get(ctx context.Context, name string, options v1.GetOptions) (result *v1alpha3.TrafficSplit, err error) {
+	result = &v1alpha3.TrafficSplit{}
+	err = c.client.Get().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		Name(name).
+		VersionedParams(&options, scheme.ParameterCodec).
+		Do(ctx).
+		Into(result)
+	return
+}
+
+// List takes label and field selectors, and returns the list of TrafficSplits that match those selectors.
+func (c *trafficSplits) List(ctx context.Context, opts v1.ListOptions) (result *v1alpha3.TrafficSplitList, err error) {
+	var timeout time.Duration
+	if opts.TimeoutSeconds != nil {
+		timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
+	}
+	result = &v1alpha3.TrafficSplitList{}
+	err = c.client.Get().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		VersionedParams(&opts, scheme.ParameterCodec).
+		Timeout(timeout).
+		Do(ctx).
+		Into(result)
+	return
+}
+
+// Watch returns a watch.Interface that watches the requested trafficSplits.
+func (c *trafficSplits) Watch(ctx context.Context, opts v1.ListOptions) (watch.Interface, error) {
+	var timeout time.Duration
+	if opts.TimeoutSeconds != nil {
+		timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
+	}
+	opts.Watch = true
+	return c.client.Get().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		VersionedParams(&opts, scheme.ParameterCodec).
+		Timeout(timeout).
+		Watch(ctx)
+}
+
+// Create takes the representation of a trafficSplit and creates it.  Returns the server's representation of the trafficSplit, and an error, if there is any.
+func (c *trafficSplits) Create(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.CreateOptions) (result *v1alpha3.TrafficSplit, err error) {
+	result = &v1alpha3.TrafficSplit{}
+	err = c.client.Post().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		VersionedParams(&opts, scheme.ParameterCodec).
+		Body(trafficSplit).
+		Do(ctx).
+		Into(result)
+	return
+}
+
+// Update takes the representation of a trafficSplit and updates it. Returns the server's representation of the trafficSplit, and an error, if there is any.
+func (c *trafficSplits) Update(ctx context.Context, trafficSplit *v1alpha3.TrafficSplit, opts v1.UpdateOptions) (result *v1alpha3.TrafficSplit, err error) {
+	result = &v1alpha3.TrafficSplit{}
+	err = c.client.Put().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		Name(trafficSplit.Name).
+		VersionedParams(&opts, scheme.ParameterCodec).
+		Body(trafficSplit).
+		Do(ctx).
+		Into(result)
+	return
+}
+
+// Delete takes name of the trafficSplit and deletes it. Returns an error if one occurs.
+func (c *trafficSplits) Delete(ctx context.Context, name string, opts v1.DeleteOptions) error {
+	return c.client.Delete().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		Name(name).
+		Body(&opts).
+		Do(ctx).
+		Error()
+}
+
+// DeleteCollection deletes a collection of objects.
+func (c *trafficSplits) DeleteCollection(ctx context.Context, opts v1.DeleteOptions, listOpts v1.ListOptions) error {
+	var timeout time.Duration
+	if listOpts.TimeoutSeconds != nil {
+		timeout = time.Duration(*listOpts.TimeoutSeconds) * time.Second
+	}
+	return c.client.Delete().
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		VersionedParams(&listOpts, scheme.ParameterCodec).
+		Timeout(timeout).
+		Body(&opts).
+		Do(ctx).
+		Error()
+}
+
+// Patch applies the patch and returns the patched trafficSplit.
+func (c *trafficSplits) Patch(ctx context.Context, name string, pt types.PatchType, data []byte, opts v1.PatchOptions, subresources ...string) (result *v1alpha3.TrafficSplit, err error) {
+	result = &v1alpha3.TrafficSplit{}
+	err = c.client.Patch(pt).
+		Namespace(c.ns).
+		Resource("trafficsplits").
+		Name(name).
+		SubResource(subresources...).
+		VersionedParams(&opts, scheme.ParameterCodec).
+		Body(data).
+		Do(ctx).
+		Into(result)
+	return
+}
diff --git a/pkg/client/informers/externalversions/generic.go b/pkg/client/informers/externalversions/generic.go
index 5182a4e1..dc376691 100644
--- a/pkg/client/informers/externalversions/generic.go
+++ b/pkg/client/informers/externalversions/generic.go
@@ -29,6 +29,7 @@ import (
 	projectcontourv1 "github.com/fluxcd/flagger/pkg/apis/projectcontour/v1"
 	v1alpha1 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha1"
 	v1alpha2 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha2"
+	smiv1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
 	traefikv1alpha1 "github.com/fluxcd/flagger/pkg/apis/traefik/v1alpha1"
 	schema "k8s.io/apimachinery/pkg/runtime/schema"
 	cache "k8s.io/client-go/tools/cache"
@@ -106,6 +107,10 @@ func (f *sharedInformerFactory) ForResource(resource schema.GroupVersionResource
 	case v1alpha2.SchemeGroupVersion.WithResource("trafficsplits"):
 		return &genericInformer{resource: resource.GroupResource(), informer: f.Split().V1alpha2().TrafficSplits().Informer()}, nil
 
+		// Group=split.smi-spec.io, Version=v1alpha3
+	case smiv1alpha3.SchemeGroupVersion.WithResource("trafficsplits"):
+		return &genericInformer{resource: resource.GroupResource(), informer: f.Split().V1alpha3().TrafficSplits().Informer()}, nil
+
 		// Group=traefik.containo.us, Version=v1alpha1
 	case traefikv1alpha1.SchemeGroupVersion.WithResource("traefikservices"):
 		return &genericInformer{resource: resource.GroupResource(), informer: f.Traefik().V1alpha1().TraefikServices().Informer()}, nil
diff --git a/pkg/client/informers/externalversions/smi/interface.go b/pkg/client/informers/externalversions/smi/interface.go
index 60398833..92e45f3f 100644
--- a/pkg/client/informers/externalversions/smi/interface.go
+++ b/pkg/client/informers/externalversions/smi/interface.go
@@ -22,6 +22,7 @@ import (
 	internalinterfaces "github.com/fluxcd/flagger/pkg/client/informers/externalversions/internalinterfaces"
 	v1alpha1 "github.com/fluxcd/flagger/pkg/client/informers/externalversions/smi/v1alpha1"
 	v1alpha2 "github.com/fluxcd/flagger/pkg/client/informers/externalversions/smi/v1alpha2"
+	v1alpha3 "github.com/fluxcd/flagger/pkg/client/informers/externalversions/smi/v1alpha3"
 )
 
 // Interface provides access to each of this group's versions.
@@ -30,6 +31,8 @@ type Interface interface {
 	V1alpha1() v1alpha1.Interface
 	// V1alpha2 provides access to shared informers for resources in V1alpha2.
 	V1alpha2() v1alpha2.Interface
+	// V1alpha3 provides access to shared informers for resources in V1alpha3.
+	V1alpha3() v1alpha3.Interface
 }
 
 type group struct {
@@ -52,3 +55,8 @@ func (g *group) V1alpha1() v1alpha1.Interface {
 func (g *group) V1alpha2() v1alpha2.Interface {
 	return v1alpha2.New(g.factory, g.namespace, g.tweakListOptions)
 }
+
+// V1alpha3 returns a new v1alpha3.Interface.
+func (g *group) V1alpha3() v1alpha3.Interface {
+	return v1alpha3.New(g.factory, g.namespace, g.tweakListOptions)
+}
diff --git a/pkg/client/informers/externalversions/smi/v1alpha3/interface.go b/pkg/client/informers/externalversions/smi/v1alpha3/interface.go
new file mode 100644
index 00000000..92c40022
--- /dev/null
+++ b/pkg/client/informers/externalversions/smi/v1alpha3/interface.go
@@ -0,0 +1,45 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by informer-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	internalinterfaces "github.com/fluxcd/flagger/pkg/client/informers/externalversions/internalinterfaces"
+)
+
+// Interface provides access to all the informers in this group version.
+type Interface interface {
+	// TrafficSplits returns a TrafficSplitInformer.
+	TrafficSplits() TrafficSplitInformer
+}
+
+type version struct {
+	factory          internalinterfaces.SharedInformerFactory
+	namespace        string
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+}
+
+// New returns a new Interface.
+func New(f internalinterfaces.SharedInformerFactory, namespace string, tweakListOptions internalinterfaces.TweakListOptionsFunc) Interface {
+	return &version{factory: f, namespace: namespace, tweakListOptions: tweakListOptions}
+}
+
+// TrafficSplits returns a TrafficSplitInformer.
+func (v *version) TrafficSplits() TrafficSplitInformer {
+	return &trafficSplitInformer{factory: v.factory, namespace: v.namespace, tweakListOptions: v.tweakListOptions}
+}
diff --git a/pkg/client/informers/externalversions/smi/v1alpha3/trafficsplit.go b/pkg/client/informers/externalversions/smi/v1alpha3/trafficsplit.go
new file mode 100644
index 00000000..7111c4da
--- /dev/null
+++ b/pkg/client/informers/externalversions/smi/v1alpha3/trafficsplit.go
@@ -0,0 +1,90 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by informer-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	"context"
+	time "time"
+
+	smiv1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	versioned "github.com/fluxcd/flagger/pkg/client/clientset/versioned"
+	internalinterfaces "github.com/fluxcd/flagger/pkg/client/informers/externalversions/internalinterfaces"
+	v1alpha3 "github.com/fluxcd/flagger/pkg/client/listers/smi/v1alpha3"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	watch "k8s.io/apimachinery/pkg/watch"
+	cache "k8s.io/client-go/tools/cache"
+)
+
+// TrafficSplitInformer provides access to a shared informer and lister for
+// TrafficSplits.
+type TrafficSplitInformer interface {
+	Informer() cache.SharedIndexInformer
+	Lister() v1alpha3.TrafficSplitLister
+}
+
+type trafficSplitInformer struct {
+	factory          internalinterfaces.SharedInformerFactory
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+	namespace        string
+}
+
+// NewTrafficSplitInformer constructs a new informer for TrafficSplit type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewTrafficSplitInformer(client versioned.Interface, namespace string, resyncPeriod time.Duration, indexers cache.Indexers) cache.SharedIndexInformer {
+	return NewFilteredTrafficSplitInformer(client, namespace, resyncPeriod, indexers, nil)
+}
+
+// NewFilteredTrafficSplitInformer constructs a new informer for TrafficSplit type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewFilteredTrafficSplitInformer(client versioned.Interface, namespace string, resyncPeriod time.Duration, indexers cache.Indexers, tweakListOptions internalinterfaces.TweakListOptionsFunc) cache.SharedIndexInformer {
+	return cache.NewSharedIndexInformer(
+		&cache.ListWatch{
+			ListFunc: func(options v1.ListOptions) (runtime.Object, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.SplitV1alpha3().TrafficSplits(namespace).List(context.TODO(), options)
+			},
+			WatchFunc: func(options v1.ListOptions) (watch.Interface, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.SplitV1alpha3().TrafficSplits(namespace).Watch(context.TODO(), options)
+			},
+		},
+		&smiv1alpha3.TrafficSplit{},
+		resyncPeriod,
+		indexers,
+	)
+}
+
+func (f *trafficSplitInformer) defaultInformer(client versioned.Interface, resyncPeriod time.Duration) cache.SharedIndexInformer {
+	return NewFilteredTrafficSplitInformer(client, f.namespace, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, f.tweakListOptions)
+}
+
+func (f *trafficSplitInformer) Informer() cache.SharedIndexInformer {
+	return f.factory.InformerFor(&smiv1alpha3.TrafficSplit{}, f.defaultInformer)
+}
+
+func (f *trafficSplitInformer) Lister() v1alpha3.TrafficSplitLister {
+	return v1alpha3.NewTrafficSplitLister(f.Informer().GetIndexer())
+}
diff --git a/pkg/client/listers/smi/v1alpha3/expansion_generated.go b/pkg/client/listers/smi/v1alpha3/expansion_generated.go
new file mode 100644
index 00000000..6f0e5a50
--- /dev/null
+++ b/pkg/client/listers/smi/v1alpha3/expansion_generated.go
@@ -0,0 +1,27 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by lister-gen. DO NOT EDIT.
+
+package v1alpha3
+
+// TrafficSplitListerExpansion allows custom methods to be added to
+// TrafficSplitLister.
+type TrafficSplitListerExpansion interface{}
+
+// TrafficSplitNamespaceListerExpansion allows custom methods to be added to
+// TrafficSplitNamespaceLister.
+type TrafficSplitNamespaceListerExpansion interface{}
diff --git a/pkg/client/listers/smi/v1alpha3/trafficsplit.go b/pkg/client/listers/smi/v1alpha3/trafficsplit.go
new file mode 100644
index 00000000..9ce91ffb
--- /dev/null
+++ b/pkg/client/listers/smi/v1alpha3/trafficsplit.go
@@ -0,0 +1,99 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by lister-gen. DO NOT EDIT.
+
+package v1alpha3
+
+import (
+	v1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	"k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/client-go/tools/cache"
+)
+
+// TrafficSplitLister helps list TrafficSplits.
+// All objects returned here must be treated as read-only.
+type TrafficSplitLister interface {
+	// List lists all TrafficSplits in the indexer.
+	// Objects returned here must be treated as read-only.
+	List(selector labels.Selector) (ret []*v1alpha3.TrafficSplit, err error)
+	// TrafficSplits returns an object that can list and get TrafficSplits.
+	TrafficSplits(namespace string) TrafficSplitNamespaceLister
+	TrafficSplitListerExpansion
+}
+
+// trafficSplitLister implements the TrafficSplitLister interface.
+type trafficSplitLister struct {
+	indexer cache.Indexer
+}
+
+// NewTrafficSplitLister returns a new TrafficSplitLister.
+func NewTrafficSplitLister(indexer cache.Indexer) TrafficSplitLister {
+	return &trafficSplitLister{indexer: indexer}
+}
+
+// List lists all TrafficSplits in the indexer.
+func (s *trafficSplitLister) List(selector labels.Selector) (ret []*v1alpha3.TrafficSplit, err error) {
+	err = cache.ListAll(s.indexer, selector, func(m interface{}) {
+		ret = append(ret, m.(*v1alpha3.TrafficSplit))
+	})
+	return ret, err
+}
+
+// TrafficSplits returns an object that can list and get TrafficSplits.
+func (s *trafficSplitLister) TrafficSplits(namespace string) TrafficSplitNamespaceLister {
+	return trafficSplitNamespaceLister{indexer: s.indexer, namespace: namespace}
+}
+
+// TrafficSplitNamespaceLister helps list and get TrafficSplits.
+// All objects returned here must be treated as read-only.
+type TrafficSplitNamespaceLister interface {
+	// List lists all TrafficSplits in the indexer for a given namespace.
+	// Objects returned here must be treated as read-only.
+	List(selector labels.Selector) (ret []*v1alpha3.TrafficSplit, err error)
+	// Get retrieves the TrafficSplit from the indexer for a given namespace and name.
+	// Objects returned here must be treated as read-only.
+	Get(name string) (*v1alpha3.TrafficSplit, error)
+	TrafficSplitNamespaceListerExpansion
+}
+
+// trafficSplitNamespaceLister implements the TrafficSplitNamespaceLister
+// interface.
+type trafficSplitNamespaceLister struct {
+	indexer   cache.Indexer
+	namespace string
+}
+
+// List lists all TrafficSplits in the indexer for a given namespace.
+func (s trafficSplitNamespaceLister) List(selector labels.Selector) (ret []*v1alpha3.TrafficSplit, err error) {
+	err = cache.ListAllByNamespace(s.indexer, s.namespace, selector, func(m interface{}) {
+		ret = append(ret, m.(*v1alpha3.TrafficSplit))
+	})
+	return ret, err
+}
+
+// Get retrieves the TrafficSplit from the indexer for a given namespace and name.
+func (s trafficSplitNamespaceLister) Get(name string) (*v1alpha3.TrafficSplit, error) {
+	obj, exists, err := s.indexer.GetByKey(s.namespace + "/" + name)
+	if err != nil {
+		return nil, err
+	}
+	if !exists {
+		return nil, errors.NewNotFound(v1alpha3.Resource("trafficsplit"), name)
+	}
+	return obj.(*v1alpha3.TrafficSplit), nil
+}
diff --git a/pkg/router/factory.go b/pkg/router/factory.go
index c315924c..5c5a1aab 100644
--- a/pkg/router/factory.go
+++ b/pkg/router/factory.go
@@ -122,6 +122,15 @@ func (factory *Factory) MeshRouter(provider string, labelSelector string) Interf
 			smiClient:     factory.meshClient,
 			targetMesh:    mesh,
 		}
+	case strings.HasPrefix(provider, flaggerv1.SMIProvider+":v1alpha3"):
+		mesh := strings.TrimPrefix(provider, flaggerv1.SMIProvider+":v1alpha3:")
+		return &Smiv1alpha3Router{
+			logger:        factory.logger,
+			flaggerClient: factory.flaggerClient,
+			kubeClient:    factory.kubeClient,
+			smiClient:     factory.meshClient,
+			targetMesh:    mesh,
+		}
 	case provider == flaggerv1.ContourProvider:
 		return &ContourRouter{
 			logger:        factory.logger,
diff --git a/pkg/router/smi_v1alpha3.go b/pkg/router/smi_v1alpha3.go
new file mode 100644
index 00000000..a6dc5112
--- /dev/null
+++ b/pkg/router/smi_v1alpha3.go
@@ -0,0 +1,198 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package router
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+	"go.uber.org/zap"
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/kubernetes"
+
+	flaggerv1 "github.com/fluxcd/flagger/pkg/apis/flagger/v1beta1"
+	smiv1alpha3 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+	clientset "github.com/fluxcd/flagger/pkg/client/clientset/versioned"
+)
+
+type Smiv1alpha3Router struct {
+	kubeClient    kubernetes.Interface
+	flaggerClient clientset.Interface
+	smiClient     clientset.Interface
+	logger        *zap.SugaredLogger
+	targetMesh    string
+}
+
+// Reconcile creates or updates the SMI traffic split
+func (sr *Smiv1alpha3Router) Reconcile(canary *flaggerv1.Canary) error {
+	apexName, primaryName, canaryName := canary.GetServiceNames()
+
+	var host string
+	if len(canary.Spec.Service.Hosts) > 0 {
+		host = canary.Spec.Service.Hosts[0]
+	} else {
+		host = apexName
+	}
+
+	tsSpec := smiv1alpha3.TrafficSplitSpec{
+		Service: host,
+		Backends: []smiv1alpha3.TrafficSplitBackend{
+			{
+				Service: canaryName,
+				Weight:  0,
+			},
+			{
+				Service: primaryName,
+				Weight:  100,
+			},
+		},
+	}
+
+	ts, err := sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Get(context.TODO(), apexName, metav1.GetOptions{})
+	// create traffic split
+	if errors.IsNotFound(err) {
+		t := &smiv1alpha3.TrafficSplit{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      apexName,
+				Namespace: canary.Namespace,
+				OwnerReferences: []metav1.OwnerReference{
+					*metav1.NewControllerRef(canary, schema.GroupVersionKind{
+						Group:   flaggerv1.SchemeGroupVersion.Group,
+						Version: flaggerv1.SchemeGroupVersion.Version,
+						Kind:    flaggerv1.CanaryKind,
+					}),
+				},
+				Annotations: sr.makeAnnotations(canary.Spec.Service.Gateways),
+			},
+			Spec: tsSpec,
+		}
+
+		_, err := sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Create(context.TODO(), t, metav1.CreateOptions{})
+		if err != nil {
+			return fmt.Errorf("TrafficSplit %s.%s create error: %w", apexName, canary.Namespace, err)
+		}
+
+		sr.logger.With("canary", fmt.Sprintf("%s.%s", canary.Name, canary.Namespace)).
+			Infof("TrafficSplit %s.%s created", t.GetName(), canary.Namespace)
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("TrafficSplit %s.%s get query error: %w", apexName, canary.Namespace, err)
+	}
+
+	// update traffic split
+	if diff := cmp.Diff(tsSpec, ts.Spec, cmpopts.IgnoreFields(smiv1alpha3.TrafficSplitBackend{}, "Weight")); diff != "" {
+		tsClone := ts.DeepCopy()
+		tsClone.Spec = tsSpec
+
+		_, err := sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Update(context.TODO(), tsClone, metav1.UpdateOptions{})
+		if err != nil {
+			return fmt.Errorf("TrafficSplit %s.%s update error: %w", apexName, canary.Namespace, err)
+		}
+
+		sr.logger.With("canary", fmt.Sprintf("%s.%s", canary.Name, canary.Namespace)).
+			Infof("TrafficSplit %s.%s updated", apexName, canary.Namespace)
+		return nil
+	}
+
+	return nil
+}
+
+// GetRoutes returns the destinations weight for primary and canary
+func (sr *Smiv1alpha3Router) GetRoutes(canary *flaggerv1.Canary) (
+	primaryWeight int,
+	canaryWeight int,
+	mirrored bool,
+	err error,
+) {
+	apexName, primaryName, canaryName := canary.GetServiceNames()
+	ts, err := sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Get(context.TODO(), apexName, metav1.GetOptions{})
+	if err != nil {
+		err = fmt.Errorf("TrafficSplit %s.%s get query error %v", apexName, canary.Namespace, err)
+		return
+	}
+
+	for _, r := range ts.Spec.Backends {
+		if r.Service == primaryName {
+			primaryWeight = r.Weight
+		}
+		if r.Service == canaryName {
+			canaryWeight = r.Weight
+		}
+	}
+
+	if primaryWeight == 0 && canaryWeight == 0 {
+		err = fmt.Errorf("TrafficSplit %s.%s does not contain routes for %s and %s",
+			apexName, canary.Namespace, primaryName, canaryName)
+	}
+
+	mirrored = false
+
+	return
+}
+
+// SetRoutes updates the destinations weight for primary and canary
+func (sr *Smiv1alpha3Router) SetRoutes(
+	canary *flaggerv1.Canary,
+	primaryWeight int,
+	canaryWeight int,
+	_ bool,
+) error {
+	apexName, primaryName, canaryName := canary.GetServiceNames()
+	ts, err := sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Get(context.TODO(), apexName, metav1.GetOptions{})
+	if err != nil {
+		return fmt.Errorf("TrafficSplit %s.%s get query error %v", apexName, canary.Namespace, err)
+	}
+
+	backends := []smiv1alpha3.TrafficSplitBackend{
+		{
+			Service: canaryName,
+			Weight:  canaryWeight,
+		},
+		{
+			Service: primaryName,
+			Weight:  primaryWeight,
+		},
+	}
+
+	tsClone := ts.DeepCopy()
+	tsClone.Spec.Backends = backends
+
+	_, err = sr.smiClient.SplitV1alpha3().TrafficSplits(canary.Namespace).Update(context.TODO(), tsClone, metav1.UpdateOptions{})
+	if err != nil {
+		return fmt.Errorf("TrafficSplit %s.%s update error %v", apexName, canary.Namespace, err)
+	}
+
+	return nil
+}
+
+func (sr *Smiv1alpha3Router) makeAnnotations(gateways []string) map[string]string {
+	res := make(map[string]string)
+	if sr.targetMesh == "istio" && len(gateways) > 0 {
+		g, _ := json.Marshal(gateways)
+		res["VirtualService.v1alpha3.networking.istio.io/spec.gateways"] = string(g)
+	}
+	return res
+}
+
+func (sr *Smiv1alpha3Router) Finalize(_ *flaggerv1.Canary) error {
+	return nil
+}


Test patch:
diff --git a/pkg/router/smi_v1alpha3_test.go b/pkg/router/smi_v1alpha3_test.go
new file mode 100644
index 00000000..e5987184
--- /dev/null
+++ b/pkg/router/smi_v1alpha3_test.go
@@ -0,0 +1,138 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package router
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	smiv1 "github.com/fluxcd/flagger/pkg/apis/smi/v1alpha3"
+)
+
+func TestSmiv1alpha3Router_Sync(t *testing.T) {
+	canary := newTestSMICanary()
+	mocks := newFixture(canary)
+	router := &Smiv1alpha3Router{
+		logger:        mocks.logger,
+		flaggerClient: mocks.flaggerClient,
+		smiClient:     mocks.meshClient,
+		kubeClient:    mocks.kubeClient,
+	}
+
+	err := router.Reconcile(canary)
+	require.NoError(t, err)
+
+	// test insert
+	ts, err := router.smiClient.SplitV1alpha3().TrafficSplits("default").Get(context.TODO(), "podinfo", metav1.GetOptions{})
+	require.NoError(t, err)
+	dests := ts.Spec.Backends
+	assert.Len(t, dests, 2)
+
+	apexName, primaryName, canaryName := canary.GetServiceNames()
+	assert.Equal(t, ts.Spec.Service, apexName)
+
+	var pRoute smiv1.TrafficSplitBackend
+	var cRoute smiv1.TrafficSplitBackend
+	for _, dest := range ts.Spec.Backends {
+		if dest.Service == primaryName {
+			pRoute = dest
+		}
+		if dest.Service == canaryName {
+			cRoute = dest
+		}
+	}
+
+	assert.Equal(t, 100, pRoute.Weight)
+	assert.Equal(t, 0, cRoute.Weight)
+
+	// test update
+	host := "test"
+	canary.Spec.Service.Name = host
+
+	err = router.Reconcile(canary)
+	require.NoError(t, err)
+
+	ts, err = router.smiClient.SplitV1alpha3().TrafficSplits("default").Get(context.TODO(), "test", metav1.GetOptions{})
+	require.NoError(t, err)
+	assert.Equal(t, host, ts.Spec.Service)
+}
+
+func TestSmiv1alpha3Router_SetRoutes(t *testing.T) {
+	canary := newTestSMICanary()
+	mocks := newFixture(canary)
+	router := &Smiv1alpha3Router{
+		logger:        mocks.logger,
+		flaggerClient: mocks.flaggerClient,
+		smiClient:     mocks.meshClient,
+		kubeClient:    mocks.kubeClient,
+	}
+
+	err := router.Reconcile(mocks.canary)
+	require.NoError(t, err)
+
+	p, c, m, err := router.GetRoutes(mocks.canary)
+	require.NoError(t, err)
+
+	p = 50
+	c = 50
+	m = false
+
+	err = router.SetRoutes(mocks.canary, p, c, m)
+	require.NoError(t, err)
+
+	ts, err := router.smiClient.SplitV1alpha3().TrafficSplits("default").Get(context.TODO(), "podinfo", metav1.GetOptions{})
+	require.NoError(t, err)
+
+	var pRoute smiv1.TrafficSplitBackend
+	var cRoute smiv1.TrafficSplitBackend
+	_, primaryName, canaryName := canary.GetServiceNames()
+
+	for _, dest := range ts.Spec.Backends {
+		if dest.Service == primaryName {
+			pRoute = dest
+		}
+		if dest.Service == canaryName {
+			cRoute = dest
+		}
+	}
+
+	assert.Equal(t, p, pRoute.Weight)
+	assert.Equal(t, c, cRoute.Weight)
+}
+
+func TestSmiv1alpha3Router_GetRoutes(t *testing.T) {
+	mocks := newFixture(nil)
+	router := &Smiv1alpha3Router{
+		logger:        mocks.logger,
+		flaggerClient: mocks.flaggerClient,
+		smiClient:     mocks.meshClient,
+		kubeClient:    mocks.kubeClient,
+	}
+
+	err := router.Reconcile(mocks.canary)
+	require.NoError(t, err)
+
+	p, c, m, err := router.GetRoutes(mocks.canary)
+	require.NoError(t, err)
+	assert.Equal(t, 100, p)
+	assert.Equal(t, 0, c)
+	assert.False(t, m)
+}