docs: Update docs for new plugins

deploy/craned/deployment.yaml

@@ -119,7 +119,7 @@ data:
         acceptedResources:
           - kind: Node
             apiVersion: v1
-      - name: Volumes
+      - name: Volume
         acceptedResources:
           - kind: PersistentVolume
             apiVersion: v1

examples/analytics/preinstall-rule.yaml

@@ -52,3 +52,21 @@ spec:
     any: true                                 # 扫描所有namespace
   recommenders:
     - name: Service
+
+---
+
+apiVersion: analysis.crane.io/v1alpha1
+kind: RecommendationRule
+metadata:
+  name: persistentvolumes-rule
+  labels:
+    analysis.crane.io/recommendation-rule-preinstall: "true"
+spec:
+  runInterval: 24h                            # 每24h运行一次
+  resourceSelectors:                          # 资源的信息
+    - kind: PersistentVolume
+      apiVersion: v1
+  namespaceSelector:
+    any: true                                 # 扫描所有namespace
+  recommenders:
+    - name: Volume

examples/analytics/recommendation-configuration.yaml

@@ -23,7 +23,7 @@ recommenders:
         apiVersion: apps/v1
       - kind: StatefulSet
         apiVersion: apps/v1
-  - name: Volumes
+  - name: Volume
     acceptedResources:
       - kind: PersistentVolume
         apiVersion: v1

pkg/recommendation/manager.go

@@ -17,6 +17,7 @@ import (
 	_ "github.com/gocrane/crane/pkg/recommendation/recommender/replicas"
 	_ "github.com/gocrane/crane/pkg/recommendation/recommender/resource"
 	_ "github.com/gocrane/crane/pkg/recommendation/recommender/service"
+	_ "github.com/gocrane/crane/pkg/recommendation/recommender/volume"
 )
 
 type RecommenderManager interface {

pkg/recommendation/recommender/const.go

@@ -13,8 +13,8 @@ const (
 	// IdleNodeRecommender name
 	IdleNodeRecommender string = "IdleNode"
 
-	// VolumesRecommender name
-	VolumesRecommender string = "Volumes"
+	// VolumeRecommender name
+	VolumeRecommender string = "Volume"
 
 	// ServiceRecommender name
 	ServiceRecommender string = "Service"

pkg/recommendation/recommender/volumes/filter.go → pkg/recommendation/recommender/volume/filter.go

@@ -1,4 +1,4 @@
-package volumes
+package volume
 
 import (
 	corev1 "k8s.io/api/core/v1"
@@ -8,7 +8,7 @@ import (
 )
 
 // Filter out k8s resources that are not supported by the recommender.
-func (vr *VolumesRecommender) Filter(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) Filter(ctx *framework.RecommendationContext) error {
 	var err error
 
 	// filter resource that not match objectIdentity

pkg/recommendation/recommender/volumes/observe.go → pkg/recommendation/recommender/volume/observe.go

@@ -1,10 +1,10 @@
-package volumes
+package volume
 
 import (
 	"github.com/gocrane/crane/pkg/recommendation/framework"
 )
 
 // Observe enhance the observability.
-func (vr *VolumesRecommender) Observe(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) Observe(ctx *framework.RecommendationContext) error {
 	return nil
 }

pkg/recommendation/recommender/volumes/prepare.go → pkg/recommendation/recommender/volume/prepare.go

@@ -1,22 +1,22 @@
-package volumes
+package volume
 
 import (
 	"github.com/gocrane/crane/pkg/recommendation/framework"
 )
 
 // CheckDataProviders in PrePrepare phase, will create data source provider via your recommendation config.
-func (vr *VolumesRecommender) CheckDataProviders(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) CheckDataProviders(ctx *framework.RecommendationContext) error {
 	if err := vr.BaseRecommender.CheckDataProviders(ctx); err != nil {
 		return err
 	}
 
 	return nil
 }
 
-func (vr *VolumesRecommender) CollectData(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) CollectData(ctx *framework.RecommendationContext) error {
 	return nil
 }
 
-func (vr *VolumesRecommender) PostProcessing(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) PostProcessing(ctx *framework.RecommendationContext) error {
 	return nil
 }

pkg/recommendation/recommender/volumes/recommend.go → pkg/recommendation/recommender/volume/recommend.go

@@ -1,4 +1,4 @@
-package volumes
+package volume
 
 import (
 	"fmt"
@@ -8,11 +8,11 @@ import (
 	"github.com/gocrane/crane/pkg/recommendation/framework"
 )
 
-func (vr *VolumesRecommender) PreRecommend(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) PreRecommend(ctx *framework.RecommendationContext) error {
 	return nil
 }
 
-func (vr *VolumesRecommender) Recommend(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) Recommend(ctx *framework.RecommendationContext) error {
 	// Check if each volume is being used by any pods
 	isOrphanVolume := true
 	var pv corev1.PersistentVolume
@@ -38,6 +38,6 @@ func (vr *VolumesRecommender) Recommend(ctx *framework.RecommendationContext) er
 }
 
 // Policy add some logic for result of recommend phase.
-func (vr *VolumesRecommender) Policy(ctx *framework.RecommendationContext) error {
+func (vr *VolumeRecommender) Policy(ctx *framework.RecommendationContext) error {
 	return nil
 }

pkg/recommendation/recommender/volume/registry.go

@@ -0,0 +1,32 @@
+package volume
+
+import (
+	analysisv1alph1 "github.com/gocrane/api/analysis/v1alpha1"
+
+	"github.com/gocrane/crane/pkg/recommendation/config"
+	"github.com/gocrane/crane/pkg/recommendation/recommender"
+	"github.com/gocrane/crane/pkg/recommendation/recommender/apis"
+	"github.com/gocrane/crane/pkg/recommendation/recommender/base"
+)
+
+var _ recommender.Recommender = &VolumeRecommender{}
+
+type VolumeRecommender struct {
+	base.BaseRecommender
+}
+
+func init() {
+	recommender.RegisterRecommenderProvider(recommender.VolumeRecommender, NewVolumeRecommender)
+}
+
+func (vr *VolumeRecommender) Name() string {
+	return recommender.VolumeRecommender
+}
+
+// NewVolumeRecommender create a new Volumes recommender.
+func NewVolumeRecommender(recommender apis.Recommender, recommendationRule analysisv1alph1.RecommendationRule) (recommender.Recommender, error) {
+	recommender = config.MergeRecommenderConfigFromRule(recommender, recommendationRule)
+	return &VolumeRecommender{
+		*base.NewBaseRecommender(recommender),
+	}, nil
+}

pkg/server/handler/clusters/cluster.go

@@ -81,6 +81,25 @@ spec:
     - name: Service
 `
 
+const RecommendationRulePVsName = "persistentvolumes-rule"
+const RecommendationRulePVsYAML = `
+apiVersion: analysis.crane.io/v1alpha1
+kind: RecommendationRule
+metadata:
+  name: persistentvolumes-rule
+  labels:
+    analysis.crane.io/recommendation-rule-preinstall: "true"
+spec:
+  runInterval: 24h                            # 每24h运行一次
+  resourceSelectors:                          # 资源的信息
+    - kind: PersistentVolume
+      apiVersion: v1
+  namespaceSelector:
+    any: true                                 # 扫描所有namespace
+  recommenders:
+    - name: Volume
+`
+
 type AddClustersRequest struct {
 	Clusters []*store.Cluster `json:"clusters"`
 }
@@ -195,6 +214,12 @@ func (ch *ClusterHandler) AddClusters(c *gin.Context) {
 				ginwrapper.WriteResponse(c, err, nil)
 				return
 			}
+
+			err = ch.upsertRecommendationRule(RecommendationRulePVsName, RecommendationRulePVsYAML)
+			if err != nil {
+				ginwrapper.WriteResponse(c, err, nil)
+				return
+			}
 		} else if err != nil {
 			ginwrapper.WriteResponse(c, err, nil)
 			return

site/content/en/docs/Tutorials/Recommendation/pv-recommendation.md

@@ -0,0 +1,73 @@
+---
+title: "PV Recommendation"
+description: "Introduce for PV Recommendation"
+weight: 17
+---
+
+PV 推荐通过扫描集群中 PV 的运行状况，帮助用户找到闲置的 Kubernetes PV。
+
+## 动机
+
+通常在 Kubernetes 中我们会使用 PV + Workload 来自动创建和管理存储卷并将存储卷挂载到应用上，在日常的运营中难免会出现空闲或者空跑的存储卷，浪费了大量成本， PV 推荐尝试帮助用户找到这部分 PV 来实现成本优化。
+
+## 推荐示例
+
+```yaml
+apiVersion: analysis.crane.io/v1alpha1
+kind: Recommendation
+metadata:
+  annotations:
+    analysis.crane.io/last-start-time: "2023-06-14 08:55:25"
+    analysis.crane.io/message: Success
+    analysis.crane.io/run-number: "653"
+  labels:
+    analysis.crane.io/recommendation-rule-name: persistentvolumes-rule
+    analysis.crane.io/recommendation-rule-recommender: Volume
+    analysis.crane.io/recommendation-rule-uid: 39d30abe-4c7f-4e65-b961-b00ec7776b45
+    analysis.crane.io/recommendation-target-kind: PersistentVolume
+    analysis.crane.io/recommendation-target-name: pvc-6ce24277-24e9-4fcf-8e8a-f9bdb5694134
+    analysis.crane.io/recommendation-target-namespace: ""
+    analysis.crane.io/recommendation-target-version: v1
+  name: persistentvolumes-rule-volume-5r9zn
+  namespace: crane-system
+  ownerReferences:
+    - apiVersion: analysis.crane.io/v1alpha1
+      blockOwnerDeletion: false
+      controller: false
+      kind: RecommendationRule
+      name: persistentvolumes-rule
+      uid: 39d30abe-4c7f-4e65-b961-b00ec7776b45
+spec:
+  adoptionType: StatusAndAnnotation
+  completionStrategy:
+    completionStrategyType: Once
+  targetRef:
+    apiVersion: v1
+    kind: PersistentVolume
+    name: pvc-6ce24277-24e9-4fcf-8e8a-f9bdb5694134
+  type: Volume
+status:
+  action: Delete
+  description: It is an Orphan Volumes
+  lastUpdateTime: "2023-06-14T08:55:25Z"
+```
+
+在该示例中：
+
+- 推荐的 TargetRef 指向了 PV: pvc-6ce24277-24e9-4fcf-8e8a-f9bdb5694134
+- 推荐类型为 PV 推荐
+- action 是 Delete，这里只是给出建议
+
+## 实现原理
+
+PV 推荐按以下步骤完成一次推荐过程：
+
+1. 扫描集群中所有 PV，找到 PV 对应的 Pod 列表
+2. 如果 PV 没有对应的 PVC，则判断为闲置 PV
+3. 如果没有 Pod 关联这个 PV 和 PVC，则判断为闲置 PVC
+
+## 参数配置
+
+目前 PV 推荐没有参数配置。
+
+如何更新推荐的配置请参考：[**推荐框架**](/zh-cn/docs/tutorials/recommendation/recommendation-framework)

site/content/en/docs/Tutorials/Recommendation/recommendation-framework.md

@@ -128,6 +128,8 @@ Currently, Crane support these Recommenders:
 - [**Replicas Recommendation**](/docs/tutorials/recommendation/replicas-recommendation): Use the HPA algorithm to analyze the actual usage of applications and recommend more appropriate replicas configurations.
 - [**HPA Recommendation**](/docs/tutorials/recommendation/hpa-recommendation): Scan the Workload in a cluster and recommend HPA configurations for Workload that are suitable for horizontal autoscaling
 - [**IdleNode Recommendation**](/docs/tutorials/recommendation/idlenode-recommendation): Find the idle nodes in cluster
+- [**Service Recommendation**](/zh-cn/docs/tutorials/recommendation/service-recommendation): Find the idle load balancer service in cluster
+- [**PV Recommendation**](/zh-cn/docs/tutorials/recommendation/pv-recommendation): Find the idle persist volume in cluster
 
 ### Recommender Framework