constellation/operators/constellation-node-operator/main.go

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/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package main
import (
"context"
"flag"
"os"
"strings"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
// to ensure that exec-entrypoint and run can make use of them.
_ "k8s.io/client-go/plugin/pkg/client/auth"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
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"
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azureclient "github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/internal/azure/client"
"github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/internal/deploy"
gcpclient "github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/internal/gcp/client"
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updatev1alpha1 "github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/api/v1alpha1"
"github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/controllers"
"github.com/edgelesssys/constellation/operators/constellation-node-operator/v2/internal/etcd"
nodemaintenancev1beta1 "github.com/medik8s/node-maintenance-operator/api/v1beta1"
//+kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
const (
defaultAzureCloudConfigPath = "/etc/azure/azure.json"
defaultGCPCloudConfigPath = "/etc/gce/gce.conf"
// constellationCSP is the environment variable stating which Cloud Service Provider Constellation is running on.
constellationCSP = "CONSTEL_CSP"
// constellationUID is the environment variable stating which uid is used to tag / label cloud provider resources belonging to one constellation.
constellationUID = "constellation-uid"
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(nodemaintenancev1beta1.AddToScheme(scheme))
utilruntime.Must(updatev1alpha1.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
func main() {
var cloudConfigPath string
var metricsAddr string
var enableLeaderElection bool
var probeAddr string
flag.StringVar(&cloudConfigPath, "cloud-config", "", "Path to provider specific cloud config. Optional.")
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.")
opts := zap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
var cspClient cspAPI
var clientErr error
csp := strings.ToLower(os.Getenv(constellationCSP))
switch csp {
case "azure":
if cloudConfigPath == "" {
cloudConfigPath = defaultAzureCloudConfigPath
}
cspClient, clientErr = azureclient.NewFromDefault(cloudConfigPath)
if clientErr != nil {
setupLog.Error(clientErr, "Unable to create Azure client")
os.Exit(1)
}
case "gcp":
if cloudConfigPath == "" {
cloudConfigPath = defaultGCPCloudConfigPath
}
cspClient, clientErr = gcpclient.New(context.Background(), cloudConfigPath)
if clientErr != nil {
setupLog.Error(clientErr, "unable to create GCP client")
os.Exit(1)
}
default:
setupLog.Info("Unknown CSP", "csp", csp)
os.Exit(1)
}
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "38cc1645.edgeless.systems",
})
if err != nil {
setupLog.Error(err, "Unable to start manager")
os.Exit(1)
}
k8sClient, err := client.New(ctrl.GetConfigOrDie(), client.Options{Scheme: scheme})
if err != nil {
setupLog.Error(err, "Unable to create k8s client")
os.Exit(1)
}
etcdClient, err := etcd.New(k8sClient)
if err != nil {
setupLog.Error(err, "Unable to create etcd client")
os.Exit(1)
}
defer etcdClient.Close()
imageInfo := deploy.NewImageInfo()
if err := deploy.InitialResources(context.Background(), k8sClient, imageInfo, cspClient, os.Getenv(constellationUID)); err != nil {
setupLog.Error(err, "Unable to deploy initial resources")
os.Exit(1)
}
if err = controllers.NewNodeImageReconciler(
cspClient, etcdClient, mgr.GetClient(), mgr.GetScheme(),
).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "Unable to create controller", "controller", "NodeImage")
os.Exit(1)
}
if err = (&controllers.AutoscalingStrategyReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "Unable to create controller", "controller", "AutoscalingStrategy")
os.Exit(1)
}
if err = controllers.NewScalingGroupReconciler(
cspClient, mgr.GetClient(), mgr.GetScheme(),
).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "Unable to create controller", "controller", "ScalingGroup")
os.Exit(1)
}
if err = controllers.NewPendingNodeReconciler(
cspClient, mgr.GetClient(), mgr.GetScheme(),
).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "Unable to create controller", "controller", "PendingNode")
os.Exit(1)
}
//+kubebuilder:scaffold:builder
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)
}
setupLog.Info("Starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "Problem running manager")
os.Exit(1)
}
}
type cspAPI interface {
// GetNodeImage retrieves the image currently used by a node.
GetNodeImage(ctx context.Context, providerID string) (string, error)
// GetScalingGroupID retrieves the scaling group that a node is part of.
GetScalingGroupID(ctx context.Context, providerID string) (string, error)
// CreateNode creates a new node inside a specified scaling group at the CSP and returns its future name and provider id.
CreateNode(ctx context.Context, scalingGroupID string) (nodeName, providerID string, err error)
// DeleteNode starts the termination of the node at the CSP.
DeleteNode(ctx context.Context, providerID string) error
// GetNodeState retrieves the state of a pending node from a CSP.
GetNodeState(ctx context.Context, providerID string) (updatev1alpha1.CSPNodeState, error)
// GetScalingGroupImage retrieves the image currently used by a scaling group.
GetScalingGroupImage(ctx context.Context, scalingGroupID string) (string, error)
// SetScalingGroupImage sets the image to be used by newly created nodes in a scaling group.
SetScalingGroupImage(ctx context.Context, scalingGroupID, imageURI string) error
// GetScalingGroupName retrieves the name of a scaling group.
GetScalingGroupName(scalingGroupID string) (string, error)
// GetScalingGroupName retrieves the name of a scaling group as needed by the cluster-autoscaler.
GetAutoscalingGroupName(scalingGroupID string) (string, error)
// ListScalingGroups retrieves a list of scaling groups for the cluster.
ListScalingGroups(ctx context.Context, uid string) (controlPlaneGroupIDs []string, workerGroupIDs []string, err error)
// AutoscalingCloudProvider returns the cloud-provider name as used by k8s cluster-autoscaler.
AutoscalingCloudProvider() string
}