Implement activation service

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

activation/cmd/main.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"flag"
+
+	"github.com/edgelesssys/constellation/activation/kms"
+	"github.com/edgelesssys/constellation/activation/kubeadm"
+	"github.com/edgelesssys/constellation/activation/server"
+	"github.com/edgelesssys/constellation/activation/validator"
+	"github.com/edgelesssys/constellation/activation/watcher"
+	"github.com/edgelesssys/constellation/coordinator/atls"
+	"github.com/edgelesssys/constellation/internal/constants"
+	"github.com/edgelesssys/constellation/internal/file"
+	"github.com/spf13/afero"
+	"k8s.io/klog/v2"
+)
+
+const (
+	bindPort = "9090"
+)
+
+func main() {
+	provider := flag.String("cloud-provider", "", "cloud service provider this binary is running on")
+	kmsEndpoint := flag.String("kms-endpoint", "", "endpoint of Constellations key management service")
+
+	klog.InitFlags(nil)
+	flag.Parse()
+	klog.V(2).Infof("\nConstellation Node Activation Service\nVersion: %s\nRunning on: %s", constants.VersionInfo, *provider)
+
+	handler := file.NewHandler(afero.NewOsFs())
+
+	validator, err := validator.New(*provider, handler)
+	if err != nil {
+		flag.Usage()
+		klog.Exitf("failed to create validator: %s", err)
+	}
+
+	tlsConfig, err := atls.CreateAttestationServerTLSConfig(nil, []atls.Validator{validator})
+	if err != nil {
+		klog.Exitf("unable to create server config: %s", err)
+	}
+
+	kubeadm, err := kubeadm.New()
+	if err != nil {
+		klog.Exitf("failed to create kubeadm: %s", err)
+	}
+	kms := kms.New(*kmsEndpoint)
+
+	server := server.New(handler, kubeadm, kms)
+
+	watcher, err := watcher.New(validator)
+	if err != nil {
+		klog.Exitf("failed to create watcher for measurements updates: %s", err)
+	}
+	defer watcher.Close()
+
+	go func() {
+		klog.V(4).Infof("starting file watcher for measurements file %s", constants.ActivationMeasurementsFilename)
+		if err := watcher.Watch(constants.ActivationMeasurementsFilename); err != nil {
+			klog.Exitf("failed to watch measurements file: %s", err)
+		}
+	}()
+
+	if err := server.Run(tlsConfig, bindPort); err != nil {
+		klog.Exitf("failed to run server: %s", err)
+	}
+}