New Plugin: Per node resources plugin implementation

.gitignore

@@ -0,0 +1 @@
+.idea/**

cmd/per-node-resources/doc.go

@@ -0,0 +1,16 @@
+// Copyright 2019-2022 The Liqo 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 main bootstraps the main plugin
+package main

cmd/per-node-resources/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"os"
+	"time"
+
+	"github.com/spf13/cobra"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/client-go/kubernetes"
+	ctrl "sigs.k8s.io/controller-runtime"
+
+	grpcserver "github.com/liqotech/liqo-resource-plugins/pkg/per-node-resources"
+	"github.com/liqotech/liqo/pkg/utils/restcfg"
+)
+
+func main() {
+	var port int
+	var selector string
+	var resyncPeriod time.Duration
+	var nodeSelector labels.Selector
+	var includeVirtualNodes bool
+
+	var rootCmd = &cobra.Command{
+		Use:          os.Args[0],
+		Short:        "Liqo plugin which devides the available resource among peered clusters",
+		SilenceUsage: true,
+		PreRunE: func(cmd *cobra.Command, args []string) error {
+			var err error
+			if nodeSelector, err = labels.Parse(selector); err != nil {
+				return err
+			}
+			return nil
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
+			config := restcfg.SetRateLimiter(ctrl.GetConfigOrDie())
+			clientset := kubernetes.NewForConfigOrDie(config)
+
+			return grpcserver.ListenAndServeGRPCServer(port, clientset, resyncPeriod, nodeSelector, includeVirtualNodes)
+		},
+	}
+
+	rootCmd.PersistentFlags().BoolVar(&includeVirtualNodes, "include-virtual-nodes", false,
+		"if true resources of virtual nodes are considered, otherwise ignored")
+	rootCmd.PersistentFlags().DurationVar(&resyncPeriod, "resync-period", 10*time.Hour, "the resync period for the informers")
+	rootCmd.PersistentFlags().IntVar(&port, "port", 6001, "set port where the server will listen on.")
+	rootCmd.PersistentFlags().StringVar(&selector, "selector", "", "the selector to filter nodes. This flag can be used multiple times.")
+
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}

go.mod

@@ -4,9 +4,27 @@ go 1.19
 
 require (
 	github.com/liqotech/liqo v0.6.0
+	github.com/onsi/ginkgo/v2 v2.6.1
 	github.com/spf13/cobra v1.6.1
 	google.golang.org/grpc v1.50.1
-	k8s.io/apimachinery v0.25.3
+	k8s.io/apimachinery v0.26.0
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/evanphx/json-patch v5.6.0+incompatible // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.2 // indirect
+	github.com/prometheus/client_golang v1.14.0 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
+	gomodules.xyz/jsonpatch/v2 v2.2.0 // indirect
+	k8s.io/apiextensions-apiserver v0.26.0 // indirect
+	k8s.io/component-base v0.26.0 // indirect
 )
 
 require (
@@ -31,29 +49,30 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/onsi/gomega v1.24.2
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/virtual-kubelet/virtual-kubelet v1.6.1-0.20220831210300-d2523fe808a2 // indirect
-	golang.org/x/net v0.1.0 // indirect
+	golang.org/x/net v0.4.0 // indirect
 	golang.org/x/oauth2 v0.0.0-20220909003341-f21342109be1 // indirect
-	golang.org/x/sys v0.1.0 // indirect
-	golang.org/x/term v0.1.0 // indirect
-	golang.org/x/text v0.4.0 // indirect
-	golang.org/x/time v0.0.0-20220922220347-f3bd1da661af // indirect
+	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/term v0.3.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20220930163606-c98284e70a91 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/api v0.25.3 // indirect
-	k8s.io/client-go v0.25.3 // indirect
+	k8s.io/api v0.26.0
+	k8s.io/client-go v0.26.0
 	k8s.io/klog/v2 v2.80.1 // indirect
-	k8s.io/kube-openapi v0.0.0-20220928191237-829ce0c27909 // indirect
-	k8s.io/kubectl v0.25.3 // indirect
+	k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280 // indirect
+	k8s.io/kubectl v0.25.3
 	k8s.io/metrics v0.25.3 // indirect
-	k8s.io/utils v0.0.0-20220922133306-665eaaec4324 // indirect
-	sigs.k8s.io/controller-runtime v0.13.0 // indirect
+	k8s.io/utils v0.0.0-20221128185143-99ec85e7a448 // indirect
+	sigs.k8s.io/controller-runtime v0.14.0
 	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
 	sigs.k8s.io/yaml v1.3.0 // indirect