Add api to get cluster nodes' resources (#260)

models/cluster_resources.go

@@ -0,0 +1,97 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"strconv"
+
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/swag"
+)
+
+// ClusterResources cluster resources
+//
+// swagger:model clusterResources
+type ClusterResources struct {
+
+	// nodes
+	Nodes []*NodeInfo `json:"nodes"`
+}
+
+// Validate validates this cluster resources
+func (m *ClusterResources) Validate(formats strfmt.Registry) error {
+	var res []error
+
+	if err := m.validateNodes(formats); err != nil {
+		res = append(res, err)
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}
+
+func (m *ClusterResources) validateNodes(formats strfmt.Registry) error {
+
+	if swag.IsZero(m.Nodes) { // not required
+		return nil
+	}
+
+	for i := 0; i < len(m.Nodes); i++ {
+		if swag.IsZero(m.Nodes[i]) { // not required
+			continue
+		}
+
+		if m.Nodes[i] != nil {
+			if err := m.Nodes[i].Validate(formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName("nodes" + "." + strconv.Itoa(i))
+				}
+				return err
+			}
+		}
+
+	}
+
+	return nil
+}
+
+// MarshalBinary interface implementation
+func (m *ClusterResources) MarshalBinary() ([]byte, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return swag.WriteJSON(m)
+}
+
+// UnmarshalBinary interface implementation
+func (m *ClusterResources) UnmarshalBinary(b []byte) error {
+	var res ClusterResources
+	if err := swag.ReadJSON(b, &res); err != nil {
+		return err
+	}
+	*m = res
+	return nil
+}

models/node_info.go

@@ -0,0 +1,97 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/swag"
+)
+
+// NodeInfo node info
+//
+// swagger:model nodeInfo
+type NodeInfo struct {
+
+	// Represents the resources of a node that are available for scheduling.
+	AllocatableResources map[string]int64 `json:"allocatable_resources,omitempty"`
+
+	// name
+	Name string `json:"name,omitempty"`
+
+	// taints
+	Taints *NodeTaints `json:"taints,omitempty"`
+
+	// Represents the total resources of a node.
+	TotalResources map[string]int64 `json:"total_resources,omitempty"`
+}
+
+// Validate validates this node info
+func (m *NodeInfo) Validate(formats strfmt.Registry) error {
+	var res []error
+
+	if err := m.validateTaints(formats); err != nil {
+		res = append(res, err)
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}
+
+func (m *NodeInfo) validateTaints(formats strfmt.Registry) error {
+
+	if swag.IsZero(m.Taints) { // not required
+		return nil
+	}
+
+	if m.Taints != nil {
+		if err := m.Taints.Validate(formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("taints")
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
+// MarshalBinary interface implementation
+func (m *NodeInfo) MarshalBinary() ([]byte, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return swag.WriteJSON(m)
+}
+
+// UnmarshalBinary interface implementation
+func (m *NodeInfo) UnmarshalBinary(b []byte) error {
+	var res NodeInfo
+	if err := swag.ReadJSON(b, &res); err != nil {
+		return err
+	}
+	*m = res
+	return nil
+}

models/node_taints.go

@@ -0,0 +1,66 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/swag"
+)
+
+// NodeTaints node taints
+//
+// swagger:model nodeTaints
+type NodeTaints struct {
+
+	// no execute
+	NoExecute []string `json:"no_execute"`
+
+	// no schedule
+	NoSchedule []string `json:"no_schedule"`
+
+	// prefer no schedule
+	PreferNoSchedule []string `json:"prefer_no_schedule"`
+}
+
+// Validate validates this node taints
+func (m *NodeTaints) Validate(formats strfmt.Registry) error {
+	return nil
+}
+
+// MarshalBinary interface implementation
+func (m *NodeTaints) MarshalBinary() ([]byte, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return swag.WriteJSON(m)
+}
+
+// UnmarshalBinary interface implementation
+func (m *NodeTaints) UnmarshalBinary(b []byte) error {
+	var res NodeTaints
+	if err := swag.ReadJSON(b, &res); err != nil {
+		return err
+	}
+	*m = res
+	return nil
+}

restapi/admin_nodes.go

@@ -0,0 +1,119 @@
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package restapi
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/minio/console/cluster"
+
+	"github.com/go-openapi/runtime/middleware"
+	"github.com/go-openapi/swag"
+	"github.com/minio/console/models"
+	"github.com/minio/console/restapi/operations"
+	"github.com/minio/console/restapi/operations/admin_api"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	v1 "k8s.io/client-go/kubernetes/typed/core/v1"
+)
+
+func registerNodesHandlers(api *operations.ConsoleAPI) {
+	api.AdminAPIGetClusterResourcesHandler = admin_api.GetClusterResourcesHandlerFunc(func(params admin_api.GetClusterResourcesParams, session *models.Principal) middleware.Responder {
+		resp, err := getClusterResourcesResponse(session)
+		if err != nil {
+			return admin_api.NewGetClusterResourcesDefault(500).WithPayload(&models.Error{Code: 500, Message: swag.String(err.Error())})
+		}
+		return admin_api.NewGetClusterResourcesOK().WithPayload(resp)
+	})
+}
+
+// getClusterResources get cluster nodes and collects taints, available and allocatable resources of the node
+func getClusterResources(ctx context.Context, clientset v1.CoreV1Interface) (*models.ClusterResources, error) {
+	// get all nodes from cluster
+	nodes, err := clientset.Nodes().List(ctx, metav1.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+	// construct ClusterResources response
+	res := &models.ClusterResources{}
+
+	for _, n := range nodes.Items {
+		// Get Total Resources
+		totalResources := make(map[string]int64)
+		for resource, quantity := range n.Status.Capacity {
+			totalResources[string(resource)] = quantity.Value()
+		}
+
+		// Get Allocatable Resources
+		allocatableResources := make(map[string]int64)
+		for resource, quantity := range n.Status.Allocatable {
+			allocatableResources[string(resource)] = quantity.Value()
+		}
+
+		// Get Node taints and split them by effect
+		taints := &models.NodeTaints{}
+		for _, t := range n.Spec.Taints {
+			var taint string
+			// when value is not defined the taint string is created without `=`
+			if strings.TrimSpace(t.Value) != "" {
+				taint = fmt.Sprintf("%s=%s:%s", t.Key, t.Value, t.Effect)
+			} else {
+				taint = fmt.Sprintf("%s:%s", t.Key, t.Effect)
+			}
+			switch t.Effect {
+			case corev1.TaintEffectNoSchedule:
+				taints.NoSchedule = append(taints.NoSchedule, taint)
+			case corev1.TaintEffectNoExecute:
+				taints.NoExecute = append(taints.NoExecute, taint)
+			case corev1.TaintEffectPreferNoSchedule:
+				taints.PreferNoSchedule = append(taints.PreferNoSchedule, taint)
+			default:
+				continue
+			}
+		}
+
+		// create node object an add it to the nodes list
+		nodeInfo := &models.NodeInfo{
+			Name:                 n.Name,
+			Taints:               taints,
+			AllocatableResources: allocatableResources,
+			TotalResources:       totalResources,
+		}
+		res.Nodes = append(res.Nodes, nodeInfo)
+	}
+	return res, nil
+}
+
+func getClusterResourcesResponse(session *models.Principal) (*models.ClusterResources, error) {
+	ctx := context.Background()
+	client, err := cluster.K8sClient(session.SessionToken)
+	if err != nil {
+		log.Println("error getting k8sClient:", err)
+		return nil, err
+	}
+
+	clusterResources, err := getClusterResources(ctx, client.CoreV1())
+	if err != nil {
+		log.Println("error getting cluster's resources:", err)
+		return nil, err
+
+	}
+	return clusterResources, nil
+}

restapi/admin_nodes_test.go

@@ -0,0 +1,159 @@
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package restapi
+
+import (
+	"context"
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	"github.com/minio/console/models"
+
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+)
+
+func Test_GetClusterResources(t *testing.T) {
+	type args struct {
+		ctx  context.Context
+		objs []runtime.Object
+	}
+	tests := []struct {
+		name     string
+		args     args
+		expected *models.ClusterResources
+		wantErr  bool
+	}{
+		{
+			name: "Get Nodes Taints and Resources",
+			args: args{
+				ctx: context.Background(),
+				objs: []runtime.Object{
+					&corev1.Node{
+						ObjectMeta: metav1.ObjectMeta{
+							Name: "node1",
+						},
+						Spec: corev1.NodeSpec{
+							Taints: []corev1.Taint{
+								corev1.Taint{
+									Key:    "node.kubernetes.io/unreachable",
+									Effect: corev1.TaintEffectNoSchedule,
+								},
+								corev1.Taint{
+									Key:    "own.minio.io/taint",
+									Effect: corev1.TaintEffectNoExecute,
+									Value:  "val",
+								},
+								corev1.Taint{
+									Key:    "node.kubernetes.io/unschedulable",
+									Effect: corev1.TaintEffectPreferNoSchedule,
+								},
+							},
+						},
+						Status: corev1.NodeStatus{
+							Capacity: corev1.ResourceList{
+								corev1.ResourceMemory: resource.MustParse("2Ki"),
+								corev1.ResourceCPU:    resource.MustParse("4Ki"),
+							},
+						},
+					},
+					&corev1.Node{
+						ObjectMeta: metav1.ObjectMeta{
+							Name: "node2",
+						},
+						Spec: corev1.NodeSpec{
+							Taints: []corev1.Taint{
+								corev1.Taint{
+									Key:    "node.kubernetes.io/unreachable",
+									Effect: corev1.TaintEffectNoSchedule,
+								},
+							},
+						},
+						Status: corev1.NodeStatus{
+							Capacity: corev1.ResourceList{
+								corev1.ResourceMemory: resource.MustParse("1Ki"),
+								corev1.ResourceCPU:    resource.MustParse("2Ki"),
+							},
+							Allocatable: corev1.ResourceList{
+								corev1.ResourceMemory: resource.MustParse("512"),
+								corev1.ResourceCPU:    resource.MustParse("1Ki"),
+							},
+						},
+					},
+				},
+			},
+			expected: &models.ClusterResources{
+				Nodes: []*models.NodeInfo{
+					&models.NodeInfo{
+						Name: "node1",
+						Taints: &models.NodeTaints{
+							NoExecute: []string{
+								"own.minio.io/taint=val:NoExecute",
+							},
+							NoSchedule: []string{
+								"node.kubernetes.io/unreachable:NoSchedule",
+							},
+							PreferNoSchedule: []string{
+								"node.kubernetes.io/unschedulable:PreferNoSchedule",
+							},
+						},
+						TotalResources: map[string]int64{
+							"memory": int64(2048),
+							"cpu":    int64(4096),
+						},
+						AllocatableResources: map[string]int64{},
+					},
+					&models.NodeInfo{
+						Name: "node2",
+						Taints: &models.NodeTaints{
+							NoSchedule: []string{
+								"node.kubernetes.io/unreachable:NoSchedule",
+							},
+						},
+						TotalResources: map[string]int64{
+							"memory": int64(1024),
+							"cpu":    int64(2048),
+						},
+						AllocatableResources: map[string]int64{
+							"memory": int64(512),
+							"cpu":    int64(1024),
+						},
+					},
+				},
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		kubeClient := fake.NewSimpleClientset(tt.args.objs...)
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := getClusterResources(tt.args.ctx, kubeClient.CoreV1())
+			if (err != nil) != tt.wantErr {
+				t.Errorf("deleteTenantAction() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if !reflect.DeepEqual(got, tt.expected) {
+				ji, _ := json.Marshal(got)
+				vi, _ := json.Marshal(tt.expected)
+				t.Errorf("\ngot: %s \nwant: %s", ji, vi)
+			}
+		})
+	}
+}

restapi/configure_console.go

@@ -112,6 +112,8 @@ func configureAPI(api *operations.ConsoleAPI) http.Handler {
 	registerTenantHandlers(api)
 	// Register ResourceQuota handlers
 	registerResourceQuotaHandlers(api)
+	// Register Nodes' handlers
+	registerNodesHandlers(api)
 
 	api.PreServerShutdown = func() {}
 

restapi/embedded_spec.go

@@ -437,6 +437,29 @@ func init() {
         }
       }
     },
+    "/cluster/resources": {
+      "get": {
+        "tags": [
+          "AdminAPI"
+        ],
+        "summary": "Get Cluster Resources",
+        "operationId": "GetClusterResources",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/clusterResources"
+            }
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/configs": {
       "get": {
         "tags": [
@@ -2021,6 +2044,17 @@ func init() {
         }
       }
     },
+    "clusterResources": {
+      "type": "object",
+      "properties": {
+        "nodes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/nodeInfo"
+          }
+        }
+      }
+    },
     "configDescription": {
       "type": "object",
       "properties": {
@@ -2560,6 +2594,33 @@ func init() {
         }
       }
     },
+    "nodeInfo": {
+      "type": "object",
+      "properties": {
+        "allocatable_resources": {
+          "description": "Represents the resources of a node that are available for scheduling.",
+          "type": "object",
+          "additionalProperties": {
+            "type": "integer",
+            "format": "int64"
+          }
+        },
+        "name": {
+          "type": "string"
+        },
+        "taints": {
+          "$ref": "#/definitions/nodeTaints"
+        },
+        "total_resources": {
+          "description": "Represents the total resources of a node.",
+          "type": "object",
+          "additionalProperties": {
+            "type": "integer",
+            "format": "int64"
+          }
+        }
+      }
+    },
     "nodeSelectorTerm": {
       "description": "A null or empty node selector term matches no objects. The requirements of them are ANDed. The TopologySelectorTerm type implements a subset of the NodeSelectorTerm.",
       "type": "object",
@@ -2624,6 +2685,29 @@ func init() {
         }
       }
     },
+    "nodeTaints": {
+      "type": "object",
+      "properties": {
+        "no_execute": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "no_schedule": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "prefer_no_schedule": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        }
+      }
+    },
     "nofiticationService": {
       "type": "string",
       "enum": [
@@ -3935,6 +4019,29 @@ func init() {
         }
       }
     },
+    "/cluster/resources": {
+      "get": {
+        "tags": [
+          "AdminAPI"
+        ],
+        "summary": "Get Cluster Resources",
+        "operationId": "GetClusterResources",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/clusterResources"
+            }
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/configs": {
       "get": {
         "tags": [
@@ -6036,6 +6143,17 @@ func init() {
         }
       }
     },
+    "clusterResources": {
+      "type": "object",
+      "properties": {
+        "nodes": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/nodeInfo"
+          }
+        }
+      }
+    },
     "configDescription": {
       "type": "object",
       "properties": {
@@ -6575,6 +6693,33 @@ func init() {
         }
       }
     },
+    "nodeInfo": {
+      "type": "object",
+      "properties": {
+        "allocatable_resources": {
+          "description": "Represents the resources of a node that are available for scheduling.",
+          "type": "object",
+          "additionalProperties": {
+            "type": "integer",
+            "format": "int64"
+          }
+        },
+        "name": {
+          "type": "string"
+        },
+        "taints": {
+          "$ref": "#/definitions/nodeTaints"
+        },
+        "total_resources": {
+          "description": "Represents the total resources of a node.",
+          "type": "object",
+          "additionalProperties": {
+            "type": "integer",
+            "format": "int64"
+          }
+        }
+      }
+    },
     "nodeSelectorTerm": {
       "description": "A null or empty node selector term matches no objects. The requirements of them are ANDed. The TopologySelectorTerm type implements a subset of the NodeSelectorTerm.",
       "type": "object",
@@ -6595,6 +6740,29 @@ func init() {
         }
       }
     },
+    "nodeTaints": {
+      "type": "object",
+      "properties": {
+        "no_execute": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "no_schedule": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "prefer_no_schedule": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        }
+      }
+    },
     "nofiticationService": {
       "type": "string",
       "enum": [

restapi/operations/admin_api/get_cluster_resources.go

@@ -0,0 +1,90 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package admin_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the generate command
+
+import (
+	"net/http"
+
+	"github.com/go-openapi/runtime/middleware"
+
+	"github.com/minio/console/models"
+)
+
+// GetClusterResourcesHandlerFunc turns a function with the right signature into a get cluster resources handler
+type GetClusterResourcesHandlerFunc func(GetClusterResourcesParams, *models.Principal) middleware.Responder
+
+// Handle executing the request and returning a response
+func (fn GetClusterResourcesHandlerFunc) Handle(params GetClusterResourcesParams, principal *models.Principal) middleware.Responder {
+	return fn(params, principal)
+}
+
+// GetClusterResourcesHandler interface for that can handle valid get cluster resources params
+type GetClusterResourcesHandler interface {
+	Handle(GetClusterResourcesParams, *models.Principal) middleware.Responder
+}
+
+// NewGetClusterResources creates a new http.Handler for the get cluster resources operation
+func NewGetClusterResources(ctx *middleware.Context, handler GetClusterResourcesHandler) *GetClusterResources {
+	return &GetClusterResources{Context: ctx, Handler: handler}
+}
+
+/*GetClusterResources swagger:route GET /cluster/resources AdminAPI getClusterResources
+
+Get Cluster Resources
+
+*/
+type GetClusterResources struct {
+	Context *middleware.Context
+	Handler GetClusterResourcesHandler
+}
+
+func (o *GetClusterResources) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	route, rCtx, _ := o.Context.RouteInfo(r)
+	if rCtx != nil {
+		r = rCtx
+	}
+	var Params = NewGetClusterResourcesParams()
+
+	uprinc, aCtx, err := o.Context.Authorize(r, route)
+	if err != nil {
+		o.Context.Respond(rw, r, route.Produces, route, err)
+		return
+	}
+	if aCtx != nil {
+		r = aCtx
+	}
+	var principal *models.Principal
+	if uprinc != nil {
+		principal = uprinc.(*models.Principal) // this is really a models.Principal, I promise
+	}
+
+	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params
+		o.Context.Respond(rw, r, route.Produces, route, err)
+		return
+	}
+
+	res := o.Handler.Handle(Params, principal) // actually handle the request
+
+	o.Context.Respond(rw, r, route.Produces, route, res)
+
+}

restapi/operations/admin_api/get_cluster_resources_parameters.go

@@ -0,0 +1,62 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package admin_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"net/http"
+
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/runtime/middleware"
+)
+
+// NewGetClusterResourcesParams creates a new GetClusterResourcesParams object
+// no default values defined in spec.
+func NewGetClusterResourcesParams() GetClusterResourcesParams {
+
+	return GetClusterResourcesParams{}
+}
+
+// GetClusterResourcesParams contains all the bound params for the get cluster resources operation
+// typically these are obtained from a http.Request
+//
+// swagger:parameters GetClusterResources
+type GetClusterResourcesParams struct {
+
+	// HTTP Request Object
+	HTTPRequest *http.Request `json:"-"`
+}
+
+// BindRequest both binds and validates a request, it assumes that complex things implement a Validatable(strfmt.Registry) error interface
+// for simple values it will use straight method calls.
+//
+// To ensure default values, the struct must have been initialized with NewGetClusterResourcesParams() beforehand.
+func (o *GetClusterResourcesParams) BindRequest(r *http.Request, route *middleware.MatchedRoute) error {
+	var res []error
+
+	o.HTTPRequest = r
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}

restapi/operations/admin_api/get_cluster_resources_responses.go

@@ -0,0 +1,133 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package admin_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"net/http"
+
+	"github.com/go-openapi/runtime"
+
+	"github.com/minio/console/models"
+)
+
+// GetClusterResourcesOKCode is the HTTP code returned for type GetClusterResourcesOK
+const GetClusterResourcesOKCode int = 200
+
+/*GetClusterResourcesOK A successful response.
+
+swagger:response getClusterResourcesOK
+*/
+type GetClusterResourcesOK struct {
+
+	/*
+	  In: Body
+	*/
+	Payload *models.ClusterResources `json:"body,omitempty"`
+}
+
+// NewGetClusterResourcesOK creates GetClusterResourcesOK with default headers values
+func NewGetClusterResourcesOK() *GetClusterResourcesOK {
+
+	return &GetClusterResourcesOK{}
+}
+
+// WithPayload adds the payload to the get cluster resources o k response
+func (o *GetClusterResourcesOK) WithPayload(payload *models.ClusterResources) *GetClusterResourcesOK {
+	o.Payload = payload
+	return o
+}
+
+// SetPayload sets the payload to the get cluster resources o k response
+func (o *GetClusterResourcesOK) SetPayload(payload *models.ClusterResources) {
+	o.Payload = payload
+}
+
+// WriteResponse to the client
+func (o *GetClusterResourcesOK) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.WriteHeader(200)
+	if o.Payload != nil {
+		payload := o.Payload
+		if err := producer.Produce(rw, payload); err != nil {
+			panic(err) // let the recovery middleware deal with this
+		}
+	}
+}
+
+/*GetClusterResourcesDefault Generic error response.
+
+swagger:response getClusterResourcesDefault
+*/
+type GetClusterResourcesDefault struct {
+	_statusCode int
+
+	/*
+	  In: Body
+	*/
+	Payload *models.Error `json:"body,omitempty"`
+}
+
+// NewGetClusterResourcesDefault creates GetClusterResourcesDefault with default headers values
+func NewGetClusterResourcesDefault(code int) *GetClusterResourcesDefault {
+	if code <= 0 {
+		code = 500
+	}
+
+	return &GetClusterResourcesDefault{
+		_statusCode: code,
+	}
+}
+
+// WithStatusCode adds the status to the get cluster resources default response
+func (o *GetClusterResourcesDefault) WithStatusCode(code int) *GetClusterResourcesDefault {
+	o._statusCode = code
+	return o
+}
+
+// SetStatusCode sets the status to the get cluster resources default response
+func (o *GetClusterResourcesDefault) SetStatusCode(code int) {
+	o._statusCode = code
+}
+
+// WithPayload adds the payload to the get cluster resources default response
+func (o *GetClusterResourcesDefault) WithPayload(payload *models.Error) *GetClusterResourcesDefault {
+	o.Payload = payload
+	return o
+}
+
+// SetPayload sets the payload to the get cluster resources default response
+func (o *GetClusterResourcesDefault) SetPayload(payload *models.Error) {
+	o.Payload = payload
+}
+
+// WriteResponse to the client
+func (o *GetClusterResourcesDefault) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.WriteHeader(o._statusCode)
+	if o.Payload != nil {
+		payload := o.Payload
+		if err := producer.Produce(rw, payload); err != nil {
+			panic(err) // let the recovery middleware deal with this
+		}
+	}
+}

restapi/operations/admin_api/get_cluster_resources_urlbuilder.go

@@ -0,0 +1,104 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+package admin_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the generate command
+
+import (
+	"errors"
+	"net/url"
+	golangswaggerpaths "path"
+)
+
+// GetClusterResourcesURL generates an URL for the get cluster resources operation
+type GetClusterResourcesURL struct {
+	_basePath string
+}
+
+// WithBasePath sets the base path for this url builder, only required when it's different from the
+// base path specified in the swagger spec.
+// When the value of the base path is an empty string
+func (o *GetClusterResourcesURL) WithBasePath(bp string) *GetClusterResourcesURL {
+	o.SetBasePath(bp)
+	return o
+}
+
+// SetBasePath sets the base path for this url builder, only required when it's different from the
+// base path specified in the swagger spec.
+// When the value of the base path is an empty string
+func (o *GetClusterResourcesURL) SetBasePath(bp string) {
+	o._basePath = bp
+}
+
+// Build a url path and query string
+func (o *GetClusterResourcesURL) Build() (*url.URL, error) {
+	var _result url.URL
+
+	var _path = "/cluster/resources"
+
+	_basePath := o._basePath
+	if _basePath == "" {
+		_basePath = "/api/v1"
+	}
+	_result.Path = golangswaggerpaths.Join(_basePath, _path)
+
+	return &_result, nil
+}
+
+// Must is a helper function to panic when the url builder returns an error
+func (o *GetClusterResourcesURL) Must(u *url.URL, err error) *url.URL {
+	if err != nil {
+		panic(err)
+	}
+	if u == nil {
+		panic("url can't be nil")
+	}
+	return u
+}
+
+// String returns the string representation of the path with query string
+func (o *GetClusterResourcesURL) String() string {
+	return o.Must(o.Build()).String()
+}
+
+// BuildFull builds a full url with scheme, host, path and query string
+func (o *GetClusterResourcesURL) BuildFull(scheme, host string) (*url.URL, error) {
+	if scheme == "" {
+		return nil, errors.New("scheme is required for a full url on GetClusterResourcesURL")
+	}
+	if host == "" {
+		return nil, errors.New("host is required for a full url on GetClusterResourcesURL")
+	}
+
+	base, err := o.Build()
+	if err != nil {
+		return nil, err
+	}
+
+	base.Scheme = scheme
+	base.Host = host
+	return base, nil
+}
+
+// StringFull returns the string representation of a complete url
+func (o *GetClusterResourcesURL) StringFull(scheme, host string) string {
+	return o.Must(o.BuildFull(scheme, host)).String()
+}

restapi/operations/console_api.go

@@ -114,6 +114,9 @@ func NewConsoleAPI(spec *loads.Document) *ConsoleAPI {
 		AdminAPIDeleteTenantHandler: admin_api.DeleteTenantHandlerFunc(func(params admin_api.DeleteTenantParams, principal *models.Principal) middleware.Responder {
 			return middleware.NotImplemented("operation admin_api.DeleteTenant has not yet been implemented")
 		}),
+		AdminAPIGetClusterResourcesHandler: admin_api.GetClusterResourcesHandlerFunc(func(params admin_api.GetClusterResourcesParams, principal *models.Principal) middleware.Responder {
+			return middleware.NotImplemented("operation admin_api.GetClusterResources has not yet been implemented")
+		}),
 		AdminAPIGetResourceQuotaHandler: admin_api.GetResourceQuotaHandlerFunc(func(params admin_api.GetResourceQuotaParams, principal *models.Principal) middleware.Responder {
 			return middleware.NotImplemented("operation admin_api.GetResourceQuota has not yet been implemented")
 		}),
@@ -308,6 +311,8 @@ type ConsoleAPI struct {
 	UserAPIDeleteServiceAccountHandler user_api.DeleteServiceAccountHandler
 	// AdminAPIDeleteTenantHandler sets the operation handler for the delete tenant operation
 	AdminAPIDeleteTenantHandler admin_api.DeleteTenantHandler
+	// AdminAPIGetClusterResourcesHandler sets the operation handler for the get cluster resources operation
+	AdminAPIGetClusterResourcesHandler admin_api.GetClusterResourcesHandler
 	// AdminAPIGetResourceQuotaHandler sets the operation handler for the get resource quota operation
 	AdminAPIGetResourceQuotaHandler admin_api.GetResourceQuotaHandler
 	// AdminAPIGetTenantUsageHandler sets the operation handler for the get tenant usage operation
@@ -506,6 +511,9 @@ func (o *ConsoleAPI) Validate() error {
 	if o.AdminAPIDeleteTenantHandler == nil {
 		unregistered = append(unregistered, "admin_api.DeleteTenantHandler")
 	}
+	if o.AdminAPIGetClusterResourcesHandler == nil {
+		unregistered = append(unregistered, "admin_api.GetClusterResourcesHandler")
+	}
 	if o.AdminAPIGetResourceQuotaHandler == nil {
 		unregistered = append(unregistered, "admin_api.GetResourceQuotaHandler")
 	}
@@ -788,6 +796,10 @@ func (o *ConsoleAPI) initHandlerCache() {
 	if o.handlers["GET"] == nil {
 		o.handlers["GET"] = make(map[string]http.Handler)
 	}
+	o.handlers["GET"]["/cluster/resources"] = admin_api.NewGetClusterResources(o.context, o.AdminAPIGetClusterResourcesHandler)
+	if o.handlers["GET"] == nil {
+		o.handlers["GET"] = make(map[string]http.Handler)
+	}
 	o.handlers["GET"]["/namespaces/{namespace}/resourcequotas/{resource-quota-name}"] = admin_api.NewGetResourceQuota(o.context, o.AdminAPIGetResourceQuotaHandler)
 	if o.handlers["GET"] == nil {
 		o.handlers["GET"] = make(map[string]http.Handler)

swagger.yml

@@ -1226,6 +1226,22 @@ paths:
             $ref: "#/definitions/error"
       tags:
         - AdminAPI
+  
+  /cluster/resources:
+    get:
+      summary: Get Cluster Resources
+      operationId: GetClusterResources
+      responses:
+        200:
+          description: A successful response.
+          schema:
+            $ref: "#/definitions/clusterResources"
+        default:
+          description: Generic error response.
+          schema:
+            $ref: "#/definitions/error"
+      tags:
+        - AdminAPI
 
 definitions:
   bucketAccess:
@@ -2573,3 +2589,50 @@ definitions:
         type: array
         items:
           $ref: "#/definitions/zone"
+
+  clusterResources:
+    type: object
+    properties:
+      nodes:
+        type: array
+        items:
+          $ref: "#/definitions/nodeInfo"
+  
+  nodeInfo:
+    type: object
+    properties:
+      name:
+        type: string
+      taints:
+        $ref: "#/definitions/nodeTaints"
+      allocatable_resources:
+        type: object
+        additionalProperties:
+            type: integer
+            format: int64
+        description: Represents the resources of a node that are available for scheduling.
+      total_resources:
+        type: object
+        additionalProperties:
+            type: integer
+            format: int64
+        description: Represents the total resources of a node.
+          
+  nodeTaints:
+    type: object 
+    properties:
+      no_schedule:
+        type: array
+        items:
+          type: string
+      no_execute:
+        type: array
+        items:
+          type: string
+      prefer_no_schedule:
+        type: array
+        items:
+          type: string
+
+
+