AB#2327 move debugd code into internal folder (#403)

* move debugd code into internal folder
* Fix paths in CMakeLists.txt
Signed-off-by: Fabian Kammel <fk@edgeless.systems>

debugd/cmd/debugd/debugd.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"net"
+	"os"
+	"sync"
+
+	"github.com/edgelesssys/constellation/bootstrapper/role"
+	"github.com/edgelesssys/constellation/debugd/internal/bootstrapper"
+	"github.com/edgelesssys/constellation/debugd/internal/debugd/deploy"
+	"github.com/edgelesssys/constellation/debugd/internal/debugd/metadata"
+	"github.com/edgelesssys/constellation/debugd/internal/debugd/metadata/cloudprovider"
+	"github.com/edgelesssys/constellation/debugd/internal/debugd/metadata/fallback"
+	"github.com/edgelesssys/constellation/debugd/internal/debugd/server"
+	platform "github.com/edgelesssys/constellation/internal/cloud/cloudprovider"
+	"github.com/edgelesssys/constellation/internal/deploy/ssh"
+	"github.com/edgelesssys/constellation/internal/deploy/user"
+	"github.com/edgelesssys/constellation/internal/iproute"
+	"github.com/edgelesssys/constellation/internal/logger"
+	"github.com/spf13/afero"
+)
+
+const debugBanner = `
+**************************************
+    THIS A CONSTELLATION DEBUG IMAGE.
+    DO NOT USE IN PRODUCTION.
+**************************************
+`
+
+func main() {
+	verbosity := flag.Int("v", 0, logger.CmdLineVerbosityDescription)
+	flag.Parse()
+
+	log := logger.New(logger.JSONLog, logger.VerbosityFromInt(*verbosity))
+	fs := afero.NewOsFs()
+	streamer := bootstrapper.NewFileStreamer(fs)
+	serviceManager := deploy.NewServiceManager(log.Named("serviceManager"))
+	ssh := ssh.NewAccess(log, user.NewLinuxUserManager(fs))
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	download := deploy.New(log.Named("download"), &net.Dialer{}, serviceManager, streamer)
+	var fetcher metadata.Fetcher
+	csp := os.Getenv("CONSTEL_CSP")
+	switch platform.FromString(csp) {
+	case platform.Azure:
+		azureFetcher, err := cloudprovider.NewAzure(ctx)
+		if err != nil {
+			log.Fatalf("%s", err)
+		}
+		fetcher = azureFetcher
+	case platform.GCP:
+		gcpFetcher, err := cloudprovider.NewGCP(ctx)
+		if err != nil {
+			log.Fatalf("%s", err)
+		}
+		fetcher = gcpFetcher
+		if err := setLoadbalancerRoute(ctx, fetcher); err != nil {
+			log.Errorf("adding load balancer IP to local routing table: %s", err)
+		}
+		log.Infof("Added load balancer IP to local routing table")
+	case platform.QEMU:
+		fetcher = cloudprovider.NewQEMU()
+	default:
+		log.Errorf("Unknown / unimplemented cloud provider CONSTEL_CSP=%v. Using fallback", csp)
+		fetcher = fallback.Fetcher{}
+	}
+	sched := metadata.NewScheduler(log.Named("scheduler"), fetcher, ssh, download)
+	serv := server.New(log.Named("server"), ssh, serviceManager, streamer)
+	if err := deploy.DeployDefaultServiceUnit(ctx, serviceManager); err != nil {
+		log.Fatalf("%s", err)
+	}
+
+	writeDebugBanner(log)
+
+	wg := &sync.WaitGroup{}
+
+	wg.Add(1)
+	go sched.Start(ctx, wg)
+	wg.Add(1)
+	go server.Start(log, wg, serv)
+
+	wg.Wait()
+}
+
+func writeDebugBanner(log *logger.Logger) {
+	tty, err := os.OpenFile("/dev/ttyS0", os.O_WRONLY, os.ModeAppend)
+	if err != nil {
+		log.Infof("Unable to open /dev/ttyS0 for printing banner: %v", err)
+		return
+	}
+	defer tty.Close()
+	if _, err := fmt.Fprint(tty, debugBanner); err != nil {
+		log.Infof("Unable to print to /dev/ttyS0: %v", err)
+	}
+}
+
+func setLoadbalancerRoute(ctx context.Context, fetcher metadata.Fetcher) error {
+	ownRole, err := fetcher.Role(ctx)
+	if err != nil {
+		return err
+	}
+	if ownRole != role.ControlPlane {
+		return nil
+	}
+	ip, err := fetcher.DiscoverLoadbalancerIP(ctx)
+	if err != nil {
+		return err
+	}
+	return iproute.AddToLocalRoutingTable(ctx, ip)
+}