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main.go
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/
main.go
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package main
import (
"context"
"database/sql"
"errors"
"fmt"
"net"
"net/netip"
"os"
"os/signal"
"syscall"
"time"
"github.com/kelseyhightower/envconfig"
"github.com/nais/device/internal/apiserver/api"
"github.com/nais/device/internal/apiserver/auth"
"github.com/nais/device/internal/apiserver/bucket"
"github.com/nais/device/internal/apiserver/config"
"github.com/nais/device/internal/apiserver/database"
"github.com/nais/device/internal/apiserver/enroller"
"github.com/nais/device/internal/apiserver/gatewayconfigurer"
"github.com/nais/device/internal/apiserver/ip"
"github.com/nais/device/internal/apiserver/jita"
"github.com/nais/device/internal/apiserver/kolide"
apiserver_metrics "github.com/nais/device/internal/apiserver/metrics"
"github.com/nais/device/internal/logger"
"github.com/nais/device/internal/pb"
"github.com/nais/device/internal/version"
wg "github.com/nais/device/internal/wireguard"
kolidepb "github.com/nais/kolide-event-handler/pkg/pb"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
)
const (
gatewayConfigSyncInterval = 1 * time.Minute
WireGuardSyncInterval = 20 * time.Second
)
func main() {
cfg := config.DefaultConfig()
err := envconfig.Process("APISERVER", &cfg)
if err != nil {
fmt.Println("unable to process environment variables: %w", err)
os.Exit(1)
}
// sets up default logger
log := logger.Setup(cfg.LogLevel).WithField("component", "main")
err = cfg.Parse() // sets dynamic defaults for some config values
if err != nil {
log.Errorf("parse configuration: %v", err)
os.Exit(1)
}
err = run(log, cfg)
if err != nil {
log.Errorf("unhandled error: %s", err)
os.Exit(1)
} else {
log.Info("naisdevice API server has shut down cleanly.")
}
}
func run(log *logrus.Entry, cfg config.Config) error {
var authenticator auth.Authenticator
var adminAuthenticator auth.UsernamePasswordAuthenticator
var gatewayAuthenticator auth.UsernamePasswordAuthenticator
var prometheusAuthenticator auth.UsernamePasswordAuthenticator
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
log.Infof("naisdevice API server %s starting up", version.Version)
log.Infof("WireGuard IPv4 address: %v", cfg.WireGuardIPv4Prefix)
log.Infof("WireGuard IPv6 address: %v", cfg.WireGuardIPv6Prefix)
wireguardPrefix, err := netip.ParsePrefix(cfg.WireGuardNetworkAddress)
if err != nil {
return fmt.Errorf("parse wireguard network address: %w", err)
}
v4Allocator := ip.NewV4Allocator(wireguardPrefix, []string{cfg.WireGuardIPv4Prefix.Addr().String()})
v6Allocator := ip.NewV6Allocator(cfg.WireGuardIPv6Prefix)
db, err := database.New(ctx, cfg.DBPath, v4Allocator, v6Allocator, !cfg.KolideEventHandlerEnabled)
if err != nil {
return fmt.Errorf("initialize database: %w", err)
}
err = readd(ctx, db)
if err != nil {
log.Errorf("upsert IPv6: %v", err)
} else {
log.Info("re-added all gateways and devices")
}
log.Infof("Loading user sessions from database...")
sessions := auth.NewSessionStore(db)
err = sessions.Warmup(ctx)
if err != nil {
return fmt.Errorf("warm session cache from database: %w", err)
}
switch cfg.DeviceAuthenticationProvider {
case "azure":
log.Infof("Fetching Azure OIDC configuration...")
err = cfg.Azure.SetupJwkSetAutoRefresh()
if err != nil {
return fmt.Errorf("fetch Azure jwks: %w", err)
}
authenticator = auth.NewAuthenticator(cfg.Azure, db, sessions)
log.Infof("Azure OIDC authenticator configured to authenticate device sessions.")
case "google":
log.Infof("Setting up Google OIDC configuration...")
err = cfg.Google.SetupJwkSetAutoRefresh()
if err != nil {
return fmt.Errorf("set up Google jwks: %w", err)
}
authenticator = auth.NewGoogleAuthenticator(cfg.Google, db, sessions)
log.Infof("Google OIDC authenticator configured to authenticate device sessions.")
default:
authenticator = auth.NewMockAuthenticator(sessions)
log.Warnf("Device authentication DISABLED! Do not run this configuration in production!")
log.Warnf("To enable device authentication, specify auth provider with --device-authentication-provider=azure|google")
}
if cfg.WireGuardEnabled {
log.Infof("Setting up WireGuard integration...")
key, err := wg.ReadOrCreatePrivateKey(cfg.WireGuardPrivateKeyPath, log.WithField("component", "wireguard"))
if err != nil {
return fmt.Errorf("generate WireGuard private key: %w", err)
}
cfg.WireGuardPrivateKey = key
netConf, err := wg.NewConfigurer(log.WithField("component", "network-configurer"), cfg.WireGuardConfigPath, cfg.WireGuardIPv4Prefix, cfg.WireGuardIPv6Prefix, string(cfg.WireGuardPrivateKey.Private()), "wg0", 51820, nil, nil, nil)
if err != nil {
return fmt.Errorf("create WireGuard configurer: %w", err)
}
err = netConf.SetupInterface()
if err != nil {
return fmt.Errorf("setup interface: %w", err)
}
go SyncLoop(ctx, log, db, netConf, cfg.StaticPeers())
log.Infof("WireGuard successfully configured.")
} else {
log.Warnf("WireGuard integration DISABLED! Do not run this configuration in production!")
}
deviceUpdates := make(chan *kolidepb.DeviceEvent, 64)
if cfg.KolideEventHandlerEnabled {
if len(cfg.KolideEventHandlerAddress) == 0 {
return fmt.Errorf("kolide-event-handler-address not configured")
}
go func() {
log.Infof("Kolide event handler stream starting on %s", cfg.KolideEventHandlerAddress)
err := kolide.DeviceEventStreamer(ctx,
log.WithField("component", "kolide-event-handler"),
cfg.KolideEventHandlerAddress,
cfg.KolideEventHandlerToken,
cfg.KolideEventHandlerSecure,
deviceUpdates,
)
if err != nil {
log.Errorf("Kolide event streamer finished: %s", err)
}
cancel()
}()
}
if cfg.AutoEnrollEnabled {
enrollPeers := append(cfg.StaticPeers(), cfg.APIServerPeer())
e, err := enroller.NewAutoEnroll(ctx, db, enrollPeers, cfg.GRPCBindAddress, log.WithField("component", "auto-enroller"))
if err != nil {
return err
}
go func() {
err := e.Run(ctx)
if err != nil {
log.WithError(err).Error("Run AutoEnroll failed")
cancel()
}
}()
}
jitaClient := jita.New(log.WithField("component", "jita"), cfg.JitaUsername, cfg.JitaPassword, cfg.JitaUrl)
if cfg.JitaEnabled {
go SyncJitaContinuosly(ctx, log, jitaClient)
}
switch cfg.GatewayConfigurer {
case "bucket":
buck := bucket.NewClient(cfg.GatewayConfigBucketName, cfg.GatewayConfigBucketObjectName)
updater := gatewayconfigurer.NewGatewayConfigurer(log.WithField("component", "gatewayconfigurer"), db, buck, gatewayConfigSyncInterval)
go updater.SyncContinuously(ctx)
case "metadata":
updater := gatewayconfigurer.NewGoogleMetadata(db, log.WithField("component", "gatewayconfigurer"))
go updater.SyncContinuously(ctx, gatewayConfigSyncInterval)
default:
log.Warn("no valid gateway configurer set, gateways won't be updated.")
}
if cfg.ControlPlaneAuthenticationEnabled {
apiKeys, err := config.Credentials(cfg.AdminCredentialEntries)
if err != nil {
return fmt.Errorf("parse admin credentials: %w", err)
}
if len(apiKeys) == 0 {
return fmt.Errorf("control plane basic authentication enabled, but no admin credentials provided (try --admin-credential-entries)")
}
promauth, err := config.Credentials(cfg.PrometheusCredentialEntries)
if err != nil {
return fmt.Errorf("parse prometheus credentials: %w", err)
}
if len(promauth) == 0 {
return fmt.Errorf("control plane basic authentication enabled, but no prometheus credentials provided (try --prometheus-credential-entries)")
}
adminAuthenticator = auth.NewAPIKeyAuthenticator(apiKeys)
gatewayAuthenticator = auth.NewGatewayAuthenticator(db)
prometheusAuthenticator = auth.NewAPIKeyAuthenticator(promauth)
log.Infof("Control plane authentication enabled.")
} else {
adminAuthenticator = auth.NewMockAPIKeyAuthenticator()
gatewayAuthenticator = auth.NewMockAPIKeyAuthenticator()
prometheusAuthenticator = auth.NewMockAPIKeyAuthenticator()
log.Warnf("Control plane authentication DISABLED! Do not run this configuration in production!")
}
grpcHandler := api.NewGRPCServer(
ctx,
log,
db,
authenticator,
adminAuthenticator,
gatewayAuthenticator,
prometheusAuthenticator,
jitaClient,
sessions,
)
opts := []grpc.ServerOption{
grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{MinTime: 9 * time.Second}),
}
grpcServer := grpc.NewServer(opts...)
pb.RegisterAPIServerServer(grpcServer, grpcHandler)
grpcListener, err := net.Listen("tcp", cfg.GRPCBindAddress)
if err != nil {
return fmt.Errorf("unable to set up gRPC server: %w", err)
}
updateDevice := func(event *kolidepb.DeviceEvent) error {
device, err := kolide.LookupDevice(ctx, db, event)
if err != nil {
return err
}
changed := false
if device.Healthy != event.GetState().Healthy() {
changed = true
}
device.Healthy = event.GetState().Healthy()
device.LastUpdated = event.GetTimestamp()
err = db.UpdateDevices(ctx, []*pb.Device{device})
if err != nil {
return err
}
if changed {
sessions.UpdateDevice(device)
grpcHandler.SendDeviceConfiguration(device)
grpcHandler.SendAllGatewayConfigurations()
}
return nil
}
// TODO: remove when we've improved JITA
// This triggers sync every 10 sec to let gateways know if someone has JITA'd
go func() {
ticker := time.NewTicker(10 * time.Second)
for {
select {
case <-ticker.C:
grpcHandler.SendAllGatewayConfigurations()
case <-ctx.Done():
log.Infof("Stopped gateway-sync hack")
return
}
}
}()
go func() {
log.Infof("Prometheus serving metrics at %v", cfg.PrometheusAddr)
err := apiserver_metrics.Serve(cfg.PrometheusAddr)
if err != nil {
log.Errorf("metrics server shut down with error; killing apiserver process: %s", err)
cancel()
}
}()
go func() {
log.Infof("gRPC server starting on %s", cfg.GRPCBindAddress)
err := grpcServer.Serve(grpcListener)
if err != nil {
log.Errorf("gRPC server exited with error: %s", err)
}
cancel()
}()
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
s := <-sigs
log.Infof("Received signal %s", s)
cancel()
}()
defer grpcServer.Stop()
go func() {
for event := range deviceUpdates {
if err := updateDevice(event); err != nil {
if errors.Is(err, sql.ErrNoRows) {
log.Debugf("Update device health: %s", err)
} else {
log.Errorf("Update device health: %s", err)
}
}
}
}()
<-ctx.Done()
log.Warnf("Program context canceled; shutting down.")
return nil
}
func readd(ctx context.Context, db database.APIServer) error {
gateways, err := db.ReadGateways(ctx)
if err != nil {
return err
}
for _, gateway := range gateways {
if gateway.Ipv6 != "" {
continue
}
if err := db.AddGateway(ctx, gateway); err != nil {
return err
}
}
devices, err := db.ReadDevices(ctx)
if err != nil {
return err
}
for _, device := range devices {
if device.Ipv6 != "" {
continue
}
if err := db.AddDevice(ctx, device); err != nil {
return err
}
}
return nil
}
func SyncLoop(ctx context.Context, log *logrus.Entry, db database.APIServer, netConf wg.NetworkConfigurer, staticPeers []*pb.Gateway) {
log.Debugf("Starting config sync")
sync := func(ctx context.Context) error {
devices, err := db.ReadDevices(ctx)
if err != nil {
return fmt.Errorf("reading devices from database: %v", err)
}
gateways, err := db.ReadGateways(ctx)
if err != nil {
return fmt.Errorf("reading gateways from database: %v", err)
}
peers := wg.CastPeerList(staticPeers)
peers = append(peers, wg.CastPeerList(devices)...)
peers = append(peers, wg.CastPeerList(gateways)...)
err = netConf.ApplyWireGuardConfig(peers)
if err != nil {
return fmt.Errorf("apply wireguard config: %v", err)
}
return nil
}
ticker := time.NewTicker(WireGuardSyncInterval)
for range ticker.C {
ctx, cancel := context.WithTimeout(ctx, WireGuardSyncInterval)
err := sync(ctx)
cancel()
if err != nil {
log.Errorf("syncing wg config: %s", err)
}
}
}
func SyncJitaContinuosly(ctx context.Context, log *logrus.Entry, j jita.Client) {
ticker := time.NewTicker(10 * time.Second)
for {
select {
case <-ticker.C:
log.Debug("Updating jita privileged users")
err := j.UpdatePrivilegedUsers()
if err != nil {
log.Errorf("Updating jita privileged users: %s", err)
}
case <-ctx.Done():
log.Infof("Stopped jita-sync")
return
}
}
}