From f1c1c9e6e41f5af50f49a9272b9c39408258ea36 Mon Sep 17 00:00:00 2001
From: richardxz <richardxiang@yunify.com>
Date: Wed, 26 Sep 2018 22:22:38 -0400
Subject: [PATCH] add hpa api

---
 pkg/apis/v1alpha/hpa/hpa.go | 57 +++++++++++++++++++++++++++++++++++++
 pkg/apis/v1alpha/install.go |  2 ++
 2 files changed, 59 insertions(+)
 create mode 100644 pkg/apis/v1alpha/hpa/hpa.go

diff --git a/pkg/apis/v1alpha/hpa/hpa.go b/pkg/apis/v1alpha/hpa/hpa.go
new file mode 100644
index 000000000..f67cb26fb
--- /dev/null
+++ b/pkg/apis/v1alpha/hpa/hpa.go
@@ -0,0 +1,57 @@
+/*
+Copyright 2018 The KubeSphere 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 hpa
+
+import (
+	"net/http"
+
+	"github.com/emicklei/go-restful"
+	"github.com/emicklei/go-restful-openapi"
+	"k8s.io/api/autoscaling/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"kubesphere.io/kubesphere/pkg/client"
+)
+
+func Register(ws *restful.WebService, subPath string) {
+
+	tags := []string{"horizontalpodautoscalers"}
+
+	ws.Route(ws.GET(subPath).To(getHpa).Consumes("*/*").Metadata(restfulspec.KeyOpenAPITags, tags).Doc(
+		"get horizontalpodautoscalers").Param(ws.PathParameter("namespace",
+		"horizontalpodautoscalers's namespace").DataType("string")).Param(ws.PathParameter(
+		"horizontalpodautoscaler", "horizontalpodautoscaler's name")).Writes(v1.HorizontalPodAutoscaler{}))
+}
+
+func getHpa(req *restful.Request, resp *restful.Response) {
+	hpa := req.PathParameter("horizontalpodautoscaler")
+	namespace := req.PathParameter("namespace")
+	client := client.NewK8sClient()
+
+	res, err := client.AutoscalingV1().HorizontalPodAutoscalers(namespace).Get(hpa, metaV1.GetOptions{})
+
+	if err != nil {
+		if errors.IsNotFound(err) {
+			resp.WriteHeaderAndEntity(http.StatusOK, nil)
+		} else {
+			resp.WriteHeaderAndEntity(http.StatusInternalServerError, nil)
+		}
+	}
+
+	resp.WriteEntity(res)
+}
diff --git a/pkg/apis/v1alpha/install.go b/pkg/apis/v1alpha/install.go
index 5a0534a40..48db15ea6 100644
--- a/pkg/apis/v1alpha/install.go
+++ b/pkg/apis/v1alpha/install.go
@@ -23,6 +23,7 @@ import (
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/containers"
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/daemonsets"
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/deployments"
+	"kubesphere.io/kubesphere/pkg/apis/v1alpha/hpa"
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/iam"
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/jobs"
 	"kubesphere.io/kubesphere/pkg/apis/v1alpha/nodes"
@@ -58,6 +59,7 @@ func init() {
 	terminal.Register(ws, "/namespaces/{namespace}/pod/{pod}/shell/{container}")
 	workloadstatus.Register(ws, "/status")
 	quota.Register(ws, "/quota")
+	hpa.Register(ws, "/namespaces/{namespace}/horizontalpodautoscalers/{horizontalpodautoscaler}")
 	jobs.Register(ws, "/namespaces/{namespace}/jobs/{job}")
 	deployments.Register(ws, "/namespaces/{namespace}/deployments/{deployment}/revisions/{revision}")
 	daemonsets.Register(ws, "/namespaces/{namespace}/daemonsets/{daemonset}/revisions/{revision}")