[Task] autoscaler API

API.md

@@ -71,7 +71,6 @@
         - [Monitor Controllers](#monitor-controllers)
         - [Monitor Certain Controller](#monitor-certain-controller)
 
-
 ## User
 
 ### Signup
@@ -1078,6 +1077,58 @@ Response Data:
 }
 ```
 
+### Update Autoscaler
+
+`ResourceName` in json can only be "cpu" or "memory".
+`ScaleTargetRefName` is the target kubernetes deployment name 
+
+Enable autoscaler
+
+**PUT /v1/deployments/autoscale?enable=true**
+
+Example:
+
+```
+curl -X PUT http://localhost:7890/v1/deployments/autoscale?enable=true
+```
+
+Request Data:
+
+```json
+{
+  "namespace": "default",
+  "scaleTargetRefName": "testDeploymentName",
+  "resourceName": "cpu",
+  "minReplicas": 1,
+  "maxReplicas": 5,
+  "targetAverageUtilization": 30
+}
+```
+
+Disable autoscaler
+
+**PUT /v1/deployments/autoscale?enable=false**
+
+Example:
+
+```
+curl -X PUT http://localhost:7890/v1/deployments/autoscale?enable=false
+```
+
+Request Data:
+
+```json
+{
+  "namespace": "default",
+  "scaleTargetRefName": "testDeploymentName",
+  "resourceName": "cpu",
+  "minReplicas": 0,
+  "maxReplicas": 0,
+  "targetAverageUtilization": 0
+}
+```
+
+
 ## Service
 
 ### Create Service

src/deployment/deployment.go

@@ -9,8 +9,9 @@ import (
 	"github.com/linkernetworks/vortex/src/entity"
 	"github.com/linkernetworks/vortex/src/serviceprovider"
 	"github.com/linkernetworks/vortex/src/utils"
-	appsv1 "k8s.io/api/apps/v1"
 
+	appsv1 "k8s.io/api/apps/v1"
+	v2beta1 "k8s.io/api/autoscaling/v2beta1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
@@ -410,3 +411,39 @@ func CreateDeployment(sp *serviceprovider.Container, deploy *entity.Deployment)
 func DeleteDeployment(sp *serviceprovider.Container, deploy *entity.Deployment) error {
 	return sp.KubeCtl.DeleteDeployment(deploy.Name, deploy.Namespace)
 }
+
+// CreateAutoscaler will create a autoscaler
+func CreateAutoscaler(sp *serviceprovider.Container, autoscalerInfo entity.AutoscalerInfo) error {
+	autoscaler := v2beta1.HorizontalPodAutoscaler{
+		ObjectMeta: metav1.ObjectMeta{
+			// use deployment name to name autoscaler's name
+			Name:      autoscalerInfo.ScaleTargetRefName,
+			Namespace: autoscalerInfo.Namespace,
+		},
+		Spec: v2beta1.HorizontalPodAutoscalerSpec{
+			ScaleTargetRef: v2beta1.CrossVersionObjectReference{
+				APIVersion: "extensions/v1beta",
+				Kind:       "Deployment",
+				Name:       autoscalerInfo.ScaleTargetRefName,
+			},
+			MinReplicas: &autoscalerInfo.MinReplicas,
+			MaxReplicas: autoscalerInfo.MaxReplicas,
+			Metrics: []v2beta1.MetricSpec{
+				{
+					Type: v2beta1.ResourceMetricSourceType,
+					Resource: &v2beta1.ResourceMetricSource{
+						Name:                     autoscalerInfo.ResourceName,
+						TargetAverageUtilization: &autoscalerInfo.TargetAverageUtilization,
+					},
+				},
+			},
+		},
+	}
+	_, err := sp.KubeCtl.CreateAutoscaler(&autoscaler, autoscalerInfo.Namespace)
+	return err
+}
+
+// DeleteAutoscaler will delete a autoscaler
+func DeleteAutoscaler(sp *serviceprovider.Container, autoscalerInfo entity.AutoscalerInfo) error {
+	return sp.KubeCtl.DeleteAutoscaler(autoscalerInfo.ScaleTargetRefName, autoscalerInfo.Namespace)
+}

src/deployment/deployment_test.go

@@ -10,6 +10,9 @@ import (
 	"github.com/linkernetworks/vortex/src/serviceprovider"
 	"github.com/moby/moby/pkg/namesgenerator"
 	"github.com/stretchr/testify/suite"
+
+	corev1 "k8s.io/api/core/v1"
+
 	"gopkg.in/mgo.v2/bson"
 )
 
@@ -475,3 +478,47 @@ func (suite *DeploymentTestSuite) TestCreateDeploymentWithNetworkTypes() {
 		})
 	}
 }
+
+func (suite *DeploymentTestSuite) TestCreateDeploymentWithAutoscaler() {
+	containers := []entity.Container{
+		{
+			Name:    namesgenerator.GetRandomName(0),
+			Image:   "busybox",
+			Command: []string{"sleep", "3600"},
+		},
+	}
+
+	testDeploymentName := namesgenerator.GetRandomName(0)
+	deploy := &entity.Deployment{
+		ID:          bson.NewObjectId(),
+		Namespace:   "default",
+		Name:        testDeploymentName,
+		Containers:  containers,
+		NetworkType: entity.DeploymentClusterNetwork,
+		EnvVars: map[string]string{
+			"MY_IP": "1.2.3.4",
+		},
+	}
+
+	autoscaler := entity.AutoscalerInfo{
+		Name:                     "test-autoscaler",
+		Namespace:                "default",
+		ScaleTargetRefName:       testDeploymentName,
+		ResourceName:             corev1.ResourceCPU,
+		MinReplicas:              1,
+		MaxReplicas:              5,
+		TargetAverageUtilization: 30,
+	}
+
+	err := CreateDeployment(suite.sp, deploy)
+	suite.NoError(err)
+
+	err = CreateAutoscaler(suite.sp, autoscaler)
+	suite.NoError(err)
+
+	err = DeleteAutoscaler(suite.sp, autoscaler)
+	suite.NoError(err)
+
+	err = DeleteDeployment(suite.sp, deploy)
+	suite.NoError(err)
+}

src/entity/deployment.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"gopkg.in/mgo.v2/bson"
+	corev1 "k8s.io/api/core/v1"
 )
 
 const (
@@ -58,25 +59,39 @@ type DeploymentConfig struct {
 
 // Deployment is the structure for deployment info
 type Deployment struct {
-	ID           bson.ObjectId       `bson:"_id,omitempty" json:"id" validate:"-"`
-	OwnerID      bson.ObjectId       `bson:"ownerID,omitempty" json:"ownerID" validate:"-"`
-	Name         string              `bson:"name" json:"name" validate:"required,k8sname"`
-	Namespace    string              `bson:"namespace" json:"namespace" validate:"required"`
-	Labels       map[string]string   `bson:"labels,omitempty" json:"labels" validate:"required,dive,keys,printascii,endkeys,required,printascii"`
-	EnvVars      map[string]string   `bson:"envVars,omitempty" json:"envVars" validate:"required,dive,keys,printascii,endkeys,required,printascii"`
-	Containers   []Container         `bson:"containers" json:"containers" validate:"required,dive,required"`
-	Volumes      []DeploymentVolume  `bson:"volumes,omitempty" json:"volumes" validate:"required,dive,required"`
-	ConfigMaps   []DeploymentConfig  `bson:"configMaps,omitempty" json:"configMaps" validate:"required,dive,required"`
-	Networks     []DeploymentNetwork `bson:"networks,omitempty" json:"networks" validate:"required,dive,required"`
-	Capability   bool                `bson:"capability" json:"capability" validate:"-"`
-	NetworkType  string              `bson:"networkType" json:"networkType" validate:"required,eq=host|eq=cluster|eq=custom"`
-	NodeAffinity []string            `bson:"nodeAffinity" json:"nodeAffinity" validate:"required"`
-	CreatedBy    User                `json:"createdBy" validate:"-"`
-	CreatedAt    *time.Time          `bson:"createdAt,omitempty" json:"createdAt,omitempty" validate:"-"`
+	ID             bson.ObjectId       `bson:"_id,omitempty" json:"id" validate:"-"`
+	OwnerID        bson.ObjectId       `bson:"ownerID,omitempty" json:"ownerID" validate:"-"`
+	Name           string              `bson:"name" json:"name" validate:"required,k8sname"`
+	Namespace      string              `bson:"namespace" json:"namespace" validate:"required"`
+	Labels         map[string]string   `bson:"labels,omitempty" json:"labels" validate:"required,dive,keys,printascii,endkeys,required,printascii"`
+	EnvVars        map[string]string   `bson:"envVars,omitempty" json:"envVars" validate:"required,dive,keys,printascii,endkeys,required,printascii"`
+	Containers     []Container         `bson:"containers" json:"containers" validate:"required,dive,required"`
+	Volumes        []DeploymentVolume  `bson:"volumes,omitempty" json:"volumes" validate:"required,dive,required"`
+	ConfigMaps     []DeploymentConfig  `bson:"configMaps,omitempty" json:"configMaps" validate:"required,dive,required"`
+	Networks       []DeploymentNetwork `bson:"networks,omitempty" json:"networks" validate:"required,dive,required"`
+	Capability     bool                `bson:"capability" json:"capability" validate:"-"`
+	NetworkType    string              `bson:"networkType" json:"networkType" validate:"required,eq=host|eq=cluster|eq=custom"`
+	NodeAffinity   []string            `bson:"nodeAffinity" json:"nodeAffinity" validate:"required"`
+	IsAutoscaler   bool                `bson:"isAutoscaler" json:"isAutoscaler" validate:"-"`
+	AutoscalerInfo AutoscalerInfo      `bson:"autoscalerInfo" json:"autoscalerInfo" validate:"-"`
+	CreatedBy      User                `json:"createdBy" validate:"-"`
+	CreatedAt      *time.Time          `bson:"createdAt,omitempty" json:"createdAt,omitempty" validate:"-"`
 
 	Replicas int32 `bson:"replicas" json:"replicas" validate:"required"`
 }
 
+// AutoscalerInfo is the structure for deploying a autoscaler with a deployment
+type AutoscalerInfo struct {
+	Name      string `bson:"name" json:"name" validate:"required,k8sname"`
+	Namespace string `bson:"namespace" json:"namespace" validate:"required"`
+	// ScaleTargetRef is deployment name
+	ScaleTargetRefName       string              `bson:"scaleTargetRefName" json:"scaleTargetRefName" validate:"required,k8sname"`
+	ResourceName             corev1.ResourceName `bson:"resourceName" json:"resourceName" validate:"required,eq=cpu|eq=memory"`
+	MinReplicas              int32               `bson:"minReplicas" json:"minReplicas" validate:"required,numeric"`
+	MaxReplicas              int32               `bson:"maxReplicas" json:"maxReplicas" validate:"required,numeric"`
+	TargetAverageUtilization int32               `bson:"targetAverageUtilization" json:"targetAverageUtilization" validate:"required,numeric"`
+}
+
 // GetCollection - get model mongo collection name.
 func (m Deployment) GetCollection() string {
 	return DeploymentCollectionName

src/kubernetes/autoscaler.go

@@ -0,0 +1,22 @@
+package kubernetes
+
+import (
+	v1beta2 "k8s.io/api/autoscaling/v2beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// CreateAutoscaler will create a autoscaler
+func (kc *KubeCtl) CreateAutoscaler(autoscaler *v1beta2.HorizontalPodAutoscaler, namespace string) (*v1beta2.HorizontalPodAutoscaler, error) {
+	return kc.Clientset.AutoscalingV2beta1().HorizontalPodAutoscalers(namespace).Create(autoscaler)
+}
+
+// GetAutoscaler will get a autoscaler
+func (kc *KubeCtl) GetAutoscaler(name string, namespace string) (*v1beta2.HorizontalPodAutoscaler, error) {
+	return kc.Clientset.AutoscalingV2beta1().HorizontalPodAutoscalers(namespace).Get(name, metav1.GetOptions{})
+}
+
+// DeleteAutoscaler will delete a autoscaler
+func (kc *KubeCtl) DeleteAutoscaler(name string, namespace string) error {
+	propagation := metav1.DeletePropagationForeground
+	return kc.Clientset.AutoscalingV2beta1().HorizontalPodAutoscalers(namespace).Delete(name, &metav1.DeleteOptions{PropagationPolicy: &propagation})
+}