Network Manager implementation (#116)

Makefile

@@ -31,6 +31,7 @@ rbacs: controller-gen
 	$(CONTROLLER_GEN) paths="./pkg/local-resource-manager" rbac:roleName=node-local-resource-manager output:rbac:stdout | awk -v RS="---\n" 'NR>1{f="./deployments/node/files/node-local-resource-manager-" $$4 ".yaml";printf "%s",$$0 > f; close(f)}' && $(SED_COMMAND) deployments/node/files/node-local-resource-manager-ClusterRole.yaml
 	$(CONTROLLER_GEN) paths="./pkg/rear-manager/" rbac:roleName=node-rear-manager output:rbac:stdout | awk -v RS="---\n" 'NR>1{f="./deployments/node/files/node-rear-manager-" $$4 ".yaml";printf "%s",$$0 > f; close(f)}' && $(SED_COMMAND) deployments/node/files/node-rear-manager-ClusterRole.yaml
 	$(CONTROLLER_GEN) paths="./pkg/rear-controller/..." rbac:roleName=node-rear-controller output:rbac:stdout | awk -v RS="---\n" 'NR>1{f="./deployments/node/files/node-rear-controller-" $$4 ".yaml";printf "%s",$$0 > f; close(f)}' &&  $(SED_COMMAND) deployments/node/files/node-rear-controller-ClusterRole.yaml
+	$(CONTROLLER_GEN) paths="./pkg/network-manager/" rbac:roleName=node-network-manager output:rbac:stdout | awk -v RS="---\n" 'NR>1{f="./deployments/node/files/node-network-manager-" $$4 ".yaml";printf "%s",$$0 > f; close(f)}' &&  $(SED_COMMAND) deployments/node/files/node-network-manager-ClusterRole.yaml
 
 # Install gci if not available
 gci:

apis/network/v1alpha1/groupversion_info.go

@@ -0,0 +1,34 @@
+// Copyright 2022-2024 FLUIDOS Project
+//
+// 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 v1alpha1 contains API Schema definitions for the advertisement v1alpha1 API group
+// +kubebuilder:object:generate=true
+// +groupName=network.fluidos.eu
+package v1alpha1
+
+import (
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/controller-runtime/pkg/scheme"
+)
+
+var (
+	// GroupVersion is group version used to register these objects.
+	GroupVersion = schema.GroupVersion{Group: "network.fluidos.eu", Version: "v1alpha1"}
+
+	// SchemeBuilder is used to add go types to the GroupVersionKind scheme.
+	SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
+
+	// AddToScheme adds the types in this group-version to the given scheme.
+	AddToScheme = SchemeBuilder.AddToScheme
+)

apis/network/v1alpha1/knowncluster_status.go

@@ -0,0 +1,23 @@
+// Copyright 2022-2024 FLUIDOS Project
+//
+// 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 v1alpha1
+
+import "github.com/fluidos-project/node/pkg/utils/tools"
+
+// UpdateStatus updates the status of the KnownCluster.
+func (knowncluster *KnownCluster) UpdateStatus() {
+	knowncluster.Status.LastUpdateTime = tools.GetTimeNow()
+	knowncluster.Status.ExpirationTime = tools.GetExpirationTime(0, 0, 10)
+}

apis/network/v1alpha1/knowncluster_types.go

@@ -0,0 +1,62 @@
+// Copyright 2022-2024 FLUIDOS Project
+//
+// 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 v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// KnownClusterSpec defines the desired state of KnownCluster.
+type KnownClusterSpec struct {
+
+	// Address of the KnownCluster.
+	Address string `json:"address"`
+}
+
+// KnownClusterStatus defines the observed state of KnownCluster.
+type KnownClusterStatus struct {
+
+	// This field represents the expiration time of the KnownCluster. It is used to determine when the KnownCluster is no longer valid.
+	ExpirationTime string `json:"expirationTime"`
+
+	// This field represents the last update time of the KnownCluster.
+	LastUpdateTime string `json:"lastUpdateTime"`
+}
+
+//+kubebuilder:object:root=true
+//+kubebuilder:subresource:status
+//+kubebuilder:resource:shortName=kclust;kclusts
+
+// KnownCluster is the Schema for the clusters API.
+type KnownCluster struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   KnownClusterSpec   `json:"spec,omitempty"`
+	Status KnownClusterStatus `json:"status,omitempty"`
+}
+
+//+kubebuilder:object:root=true
+
+// KnownClusterList contains a list of KnownCluster.
+type KnownClusterList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []KnownCluster `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&KnownCluster{}, &KnownClusterList{})
+}

cmd/network-manager/doc.go

@@ -0,0 +1,16 @@
+// Copyright 2022-2024 FLUIDOS Project
+//
+// 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 is the entrypoint for the network manager
+package main

cmd/network-manager/main.go

@@ -0,0 +1,129 @@
+// Copyright 2022-2024 FLUIDOS Project
+//
+// 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
+
+import (
+	"context"
+	"flag"
+	"os"
+
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/healthz"
+	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+
+	networkv1alpha1 "github.com/fluidos-project/node/apis/network/v1alpha1"
+	nodecorev1alpha1 "github.com/fluidos-project/node/apis/nodecore/v1alpha1"
+	networkmanager "github.com/fluidos-project/node/pkg/network-manager"
+)
+
+var (
+	scheme   = runtime.NewScheme()
+	setupLog = ctrl.Log.WithName("setup")
+)
+
+func init() {
+	utilruntime.Must(corev1.AddToScheme(scheme))
+	utilruntime.Must(nodecorev1alpha1.AddToScheme(scheme))
+	utilruntime.Must(networkv1alpha1.AddToScheme(scheme))
+	//+kubebuilder:scaffold:scheme
+}
+
+func main() {
+	var metricsAddr string
+	var enableLeaderElection bool
+	var probeAddr string
+	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
+	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
+	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
+		"Enable leader election for controller manager. "+
+			"Enabling this will ensure there is only one active controller manager.")
+	enableLocalDiscovery := flag.Bool("enable-local-discovery", true, "Enable discovery of other clusters on same LAN")
+	cniInterface := flag.String("cniInterface", "", "Name of the CNI virtual interface")
+	opts := zap.Options{
+		Development: true,
+	}
+	opts.BindFlags(flag.CommandLine)
+	flag.Parse()
+
+	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
+
+	// Client
+	cfg := ctrl.GetConfigOrDie()
+	cl, err := client.New(cfg, client.Options{Scheme: scheme})
+	if err != nil {
+		setupLog.Error(err, "Unable to create client")
+		os.Exit(1)
+	}
+
+	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+		Scheme:                 scheme,
+		MetricsBindAddress:     metricsAddr,
+		HealthProbeBindAddress: probeAddr,
+		LeaderElection:         enableLeaderElection,
+		LeaderElectionID:       "a0b0c1d1.fluidos.eu",
+	})
+	if err != nil {
+		setupLog.Error(err, "unable to start manager")
+		os.Exit(1)
+	}
+
+	// Print something about the mgr
+	setupLog.Info("Manager started", "manager", mgr)
+
+	// Buffer for clusters multicast messages
+	nm := &networkmanager.NetworkManager{EnableLocalDiscovery: *enableLocalDiscovery}
+
+	// Start the NetworkManager setup
+	if err := networkmanager.Setup(context.Background(), cl, nm, cniInterface); err != nil {
+		setupLog.Error(err, "Unable to setup NetworkManager")
+		os.Exit(1)
+	}
+
+	// Start the NetworkManager extecution
+	if err := networkmanager.Execute(context.Background(), cl, nm); err != nil {
+		setupLog.Error(err, "Unable to execute NetworkManager")
+		os.Exit(1)
+	}
+
+	// Register the controller
+	if err = (&networkmanager.KnownClusterReconciler{
+		Client: cl,
+		Scheme: mgr.GetScheme(),
+	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "KnownCluster")
+		os.Exit(1)
+	}
+
+	// Register health checks
+	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to set up health check")
+		os.Exit(1)
+	}
+	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
+		setupLog.Error(err, "unable to set up ready check")
+		os.Exit(1)
+	}
+
+	// Start the NetworkManager reconcile
+	setupLog.Info("Starting manager")
+	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
+		setupLog.Error(err, "problem running manager")
+		os.Exit(1)
+	}
+}