mirror of
https://github.com/edgelesssys/constellation.git
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257 lines
9.6 KiB
Go
257 lines
9.6 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package main
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import (
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"context"
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"flag"
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"os"
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"strings"
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// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
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// to ensure that exec-entrypoint and run can make use of them.
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"k8s.io/client-go/discovery"
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_ "k8s.io/client-go/plugin/pkg/client/auth"
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"k8s.io/apimachinery/pkg/runtime"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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clientgoscheme "k8s.io/client-go/kubernetes/scheme"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/healthz"
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"sigs.k8s.io/controller-runtime/pkg/log/zap"
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metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
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cspapi "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/cloud/api"
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awsclient "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/cloud/aws/client"
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azureclient "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/cloud/azure/client"
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cloudfake "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/cloud/fake/client"
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gcpclient "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/cloud/gcp/client"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/deploy"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/executor"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/upgrade"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/sgreconciler"
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nodemaintenancev1beta1 "github.com/edgelesssys/constellation/v2/3rdparty/node-maintenance-operator/api/v1beta1"
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updatev1alpha1 "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/api/v1alpha1"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/controllers"
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"github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/internal/etcd"
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//+kubebuilder:scaffold:imports
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)
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var (
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scheme = runtime.NewScheme()
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setupLog = ctrl.Log.WithName("setup")
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)
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const (
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defaultAzureCloudConfigPath = "/etc/azure/azure.json"
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defaultGCPCloudConfigPath = "/etc/gce/gce.conf"
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// constellationCSP is the environment variable stating which Cloud Service Provider Constellation is running on.
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constellationCSP = "CONSTEL_CSP"
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// constellationUID is the environment variable stating which uid is used to tag / label cloud provider resources belonging to one constellation.
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constellationUID = "constellation-uid"
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)
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func init() {
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utilruntime.Must(clientgoscheme.AddToScheme(scheme))
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utilruntime.Must(nodemaintenancev1beta1.AddToScheme(scheme))
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utilruntime.Must(updatev1alpha1.AddToScheme(scheme))
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//+kubebuilder:scaffold:scheme
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}
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func main() {
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var cloudConfigPath string
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var metricsAddr string
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var enableLeaderElection bool
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var probeAddr string
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flag.StringVar(&cloudConfigPath, "cloud-config", "", "Path to provider specific cloud config. Optional.")
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flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
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flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
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flag.BoolVar(&enableLeaderElection, "leader-elect", false,
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"Enable leader election for controller manager. "+
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"Enabling this will ensure there is only one active controller manager.")
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opts := zap.Options{
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Development: true,
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}
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opts.BindFlags(flag.CommandLine)
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flag.Parse()
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ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
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// Create CSP client
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var cspClient cspAPI
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var clientErr error
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csp := strings.ToLower(os.Getenv(constellationCSP))
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switch csp {
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case "azure":
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if cloudConfigPath == "" {
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cloudConfigPath = defaultAzureCloudConfigPath
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}
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cspClient, clientErr = azureclient.NewFromDefault(cloudConfigPath)
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if clientErr != nil {
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setupLog.Error(clientErr, "Unable to create Azure client")
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os.Exit(1)
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}
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case "gcp":
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if cloudConfigPath == "" {
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cloudConfigPath = defaultGCPCloudConfigPath
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}
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cspClient, clientErr = gcpclient.New(context.Background(), cloudConfigPath)
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if clientErr != nil {
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setupLog.Error(clientErr, "unable to create GCP client")
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os.Exit(1)
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}
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case "aws":
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cspClient, clientErr = awsclient.New(context.Background())
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if clientErr != nil {
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setupLog.Error(clientErr, "unable to create AWS client")
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os.Exit(1)
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}
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default:
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setupLog.Info("CSP does not support upgrades", "csp", csp)
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cspClient = &cloudfake.Client{}
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}
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mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
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Scheme: scheme,
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Metrics: metricsserver.Options{
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BindAddress: metricsAddr,
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},
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HealthProbeBindAddress: probeAddr,
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LeaderElection: enableLeaderElection,
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LeaderElectionID: "38cc1645.edgeless.systems",
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})
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if err != nil {
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setupLog.Error(err, "Unable to start manager")
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os.Exit(1)
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}
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k8sClient, err := client.New(ctrl.GetConfigOrDie(), client.Options{Scheme: scheme})
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if err != nil {
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setupLog.Error(err, "Unable to create k8s client")
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os.Exit(1)
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}
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discoveryClient, err := discovery.NewDiscoveryClientForConfig(ctrl.GetConfigOrDie())
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if err != nil {
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setupLog.Error(err, "Unable to create discovery client")
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os.Exit(1)
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}
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etcdClient, err := etcd.New(k8sClient)
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if err != nil {
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setupLog.Error(err, "Unable to create etcd client")
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os.Exit(1)
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}
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defer etcdClient.Close()
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uid := os.Getenv(constellationUID)
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extScalingGroupReconciler := sgreconciler.NewExternalScalingGroupReconciler(
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uid,
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cspClient,
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k8sClient,
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)
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exec := executor.New(extScalingGroupReconciler, executor.NewDefaultConfig())
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stopAndWaitForExecutor := exec.Start(context.Background())
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defer stopAndWaitForExecutor()
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imageInfo := deploy.NewImageInfo()
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if err := deploy.InitialResources(context.Background(), k8sClient, imageInfo, cspClient, uid); err != nil {
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setupLog.Error(err, "Unable to deploy initial resources")
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os.Exit(1)
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}
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// Create Controllers
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if csp == "azure" || csp == "gcp" || csp == "aws" {
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if err = controllers.NewNodeVersionReconciler(
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cspClient, etcdClient, upgrade.NewClient(), discoveryClient, mgr.GetClient(), mgr.GetScheme(),
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).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "NodeVersion")
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os.Exit(1)
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}
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if err = (&controllers.AutoscalingStrategyReconciler{
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Client: mgr.GetClient(),
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Scheme: mgr.GetScheme(),
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}).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "AutoscalingStrategy")
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os.Exit(1)
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}
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if err = controllers.NewScalingGroupReconciler(
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cspClient, mgr.GetClient(), mgr.GetScheme(),
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).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "ScalingGroup")
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os.Exit(1)
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}
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if err = controllers.NewPendingNodeReconciler(
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cspClient, mgr.GetClient(), mgr.GetScheme(),
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).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "PendingNode")
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os.Exit(1)
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}
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}
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if err = controllers.NewJoiningNodesReconciler(
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mgr.GetClient(),
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mgr.GetScheme(),
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).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "JoiningNode")
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os.Exit(1)
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}
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//+kubebuilder:scaffold:builder
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if err = sgreconciler.NewNodeJoinWatcher(
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exec.Trigger,
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mgr.GetClient(),
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mgr.GetScheme(),
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).SetupWithManager(mgr); err != nil {
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setupLog.Error(err, "Unable to create controller", "controller", "NodeJoinWatcher")
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os.Exit(1)
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}
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if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
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setupLog.Error(err, "Unable to set up health check")
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os.Exit(1)
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}
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if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
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setupLog.Error(err, "Unable to set up ready check")
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os.Exit(1)
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}
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setupLog.Info("Starting manager")
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if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
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setupLog.Error(err, "Problem running manager")
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os.Exit(1)
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}
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}
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type cspAPI interface {
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// GetNodeImage retrieves the image currently used by a node.
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GetNodeImage(ctx context.Context, providerID string) (string, error)
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// GetScalingGroupID retrieves the scaling group that a node is part of.
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GetScalingGroupID(ctx context.Context, providerID string) (string, error)
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// CreateNode creates a new node inside a specified scaling group at the CSP and returns its future name and provider id.
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CreateNode(ctx context.Context, scalingGroupID string) (nodeName, providerID string, err error)
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// DeleteNode starts the termination of the node at the CSP.
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DeleteNode(ctx context.Context, providerID string) error
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// GetNodeState retrieves the state of a pending node from a CSP.
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GetNodeState(ctx context.Context, providerID string) (updatev1alpha1.CSPNodeState, error)
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// GetScalingGroupImage retrieves the image currently used by a scaling group.
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GetScalingGroupImage(ctx context.Context, scalingGroupID string) (string, error)
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// SetScalingGroupImage sets the image to be used by newly created nodes in a scaling group.
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SetScalingGroupImage(ctx context.Context, scalingGroupID, imageURI string) error
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// GetScalingGroupName retrieves the name of a scaling group.
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GetScalingGroupName(scalingGroupID string) (string, error)
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// GetAutoscalingGroupName retrieves the name of a scaling group as needed by the cluster-autoscaler.
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GetAutoscalingGroupName(scalingGroupID string) (string, error)
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// ListScalingGroups retrieves a list of scaling groups for the cluster.
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ListScalingGroups(ctx context.Context, uid string) ([]cspapi.ScalingGroup, error)
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// AutoscalingCloudProvider returns the cloud-provider name as used by k8s cluster-autoscaler.
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AutoscalingCloudProvider() string
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}
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