[management,client] Default to NetBird's upload service when nothing is configured

The previous commit made a peer with no destination — no MDM override, no URL
named by the caller, nothing published by its management server — refuse to
upload and keep the bundle local unless it was enrolled with NetBird's cloud.
That closed the reported data-boundary concern, but it broke the default for
everyone who uploads a bundle as part of their day: a self-hosted user opening
a support ticket got a refusal where the command used to work.

Product decision (NetBird's, not the reporter's): the knob to keep bundles
inside your own infrastructure is what this branch provides, and it is enough.
The default stays the service NetBird runs, self-hosted included. An admin who
needs the bundles to stay in-house configures the destination; until then the
everyday flow keeps working.

So ResolveUploadURL drops the cloud check, the sentinel error and the
managementURL argument, and never fails:

    MDM  >  explicitly named URL  >  published by management  >  NetBird's service

Nothing observable changes for a deployment that configures nothing, which also
removes two edge cases the fail-closed default had: a peer still enrolled on the
legacy api.wiretrustee.com host would have been classified self-hosted and
refused, and an upgrade would have silently stopped uploads for self-hosted
deployments relying on them. The privilege gate is unaffected — a host other
than the default one still requires a privileged caller, so pointing the CLI
somewhere other than what management published needs root.

client/android/client.go

@@ -349,8 +349,8 @@ func (c *Client) DebugBundle(platformFiles PlatformFiles, anonymize bool, anonym
 	}
 
 	// Empty unless an engine is running and has synced: a bundle generated with
-	// the client stopped has no management-published destination, so it uploads
-	// only when the peer is enrolled with NetBird's cloud.
+	// the client stopped has no management-published destination and goes to the
+	// service NetBird runs.
 	var publishedUploadURL string
 
 	if cc != nil {
@@ -380,15 +380,9 @@ func (c *Client) DebugBundle(platformFiles PlatformFiles, anonymize bool, anonym
 		},
 	)
 
-	// Resolved before the bundle is generated: with no destination there is
-	// nothing to hand back to the app, and generating (then deleting) a bundle
-	// nobody can collect is wasted work on the device. An MDM override wins;
-	// otherwise the destination this deployment publishes is used, and only a
-	// peer enrolled with NetBird's cloud falls back to the service NetBird runs.
-	uploadURL, err := debug.ResolveUploadURL(cfg.DebugBundleUploadURL, publishedUploadURL, cfg.ManagementURL.String())
-	if err != nil {
-		return "", err
-	}
+	// An MDM override wins; otherwise the destination this deployment publishes
+	// is used, and failing that the service NetBird runs.
+	uploadURL := debug.ResolveUploadURL(cfg.DebugBundleUploadURL, publishedUploadURL)
 
 	path, err := bundleGenerator.Generate()
 	if err != nil {

client/internal/debug/destination.go

@@ -1,41 +1,29 @@
 package debug
 
 import (
-	"errors"
-
-	"github.com/netbirdio/netbird/client/internal/metrics"
 	"github.com/netbirdio/netbird/upload-server/types"
 )
 
-// ErrNoUploadDestination reports that a bundle has nowhere to go: the
-// management server of this deployment publishes no upload service, and the
-// peer is not enrolled with NetBird's cloud either. A debug bundle carries the
-// peer's logs, routes, DNS and firewall state, so the default is to keep it
-// inside the operator's control sphere rather than fall back to the service
-// NetBird runs.
-var ErrNoUploadDestination = errors.New("this deployment publishes no debug bundle upload service; set it on the account settings or in the management server config, or pass an explicit upload URL")
-
-// ResolveUploadURL decides where a debug bundle may be uploaded.
+// ResolveUploadURL decides where a debug bundle is uploaded.
 //
-// requested is a destination a caller named explicitly (a CLI flag, the daemon
-// request); it always wins, and the callers that accept one gate it separately.
-// published is what the management server of this deployment advertises, which
-// the engine holds (Engine.DebugUploadURL). With neither, only a peer enrolled
-// with NetBird's cloud falls back to the service NetBird runs — for anyone else
-// that would carry the bundle out of the deployment the operator controls, so it
-// fails closed with ErrNoUploadDestination.
-func ResolveUploadURL(requested, published, managementURL string) (string, error) {
+// requested is a destination a caller named explicitly — an MDM override, the
+// CLI's --upload-bundle-url, a remote job's upload_url; it always wins, and the
+// callers that accept one gate it separately (see requirePrivilegeForUploadURL:
+// any host other than the default needs a privileged caller). published is what
+// the management server of this deployment advertises, which the engine holds
+// (Engine.DebugUploadURL). With neither, the upload service NetBird runs is the
+// default, for a self-hosted deployment as much as for a cloud one: an operator
+// who needs the bundles to stay inside their own infrastructure points either
+// knob at their own upload service, and until they do the everyday
+// "collect a bundle and send it to support" flow keeps working.
+func ResolveUploadURL(requested, published string) string {
 	if requested != "" {
-		return requested, nil
+		return requested
 	}
 
 	if published != "" {
-		return published, nil
+		return published
 	}
 
-	if metrics.DetermineDeploymentType(managementURL) == metrics.DeploymentTypeCloud {
-		return types.DefaultBundleURL, nil
-	}
-
-	return "", ErrNoUploadDestination
+	return types.DefaultBundleURL
 }

client/internal/debug/destination_test.go

@@ -4,83 +4,50 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 
 	"github.com/netbirdio/netbird/upload-server/types"
 )
 
 func TestResolveUploadURL(t *testing.T) {
 	const (
-		cloudMgm      = "https://api.netbird.io:443"
-		selfHostedMgm = "https://netbird.example.com:33073"
-		operatorURL   = "https://upload.example.com/upload-url"
-		requestedURL  = "https://requested.example.com/upload-url"
+		operatorURL  = "https://upload.example.com/upload-url"
+		requestedURL = "https://requested.example.com/upload-url"
 	)
 
 	tests := []struct {
-		name          string
-		requested     string
-		published     string
-		managementURL string
-		want          string
-		wantErr       bool
+		name      string
+		requested string
+		published string
+		want      string
 	}{
 		{
-			name:          "requested wins over published",
-			requested:     requestedURL,
-			published:     operatorURL,
-			managementURL: selfHostedMgm,
-			want:          requestedURL,
+			name:      "requested wins over published",
+			requested: requestedURL,
+			published: operatorURL,
+			want:      requestedURL,
 		},
 		{
-			name:          "requested wins on cloud too",
-			requested:     requestedURL,
-			managementURL: cloudMgm,
-			want:          requestedURL,
+			name:      "requested wins with nothing published",
+			requested: requestedURL,
+			want:      requestedURL,
 		},
 		{
-			name:          "published used when nothing requested",
-			published:     operatorURL,
-			managementURL: selfHostedMgm,
-			want:          operatorURL,
+			name:      "published used when nothing requested",
+			published: operatorURL,
+			want:      operatorURL,
 		},
 		{
-			// A cloud deployment publishing its own destination must not be
-			// overridden by the compiled-in default.
-			name:          "published wins over the cloud fallback",
-			published:     operatorURL,
-			managementURL: cloudMgm,
-			want:          operatorURL,
-		},
-		{
-			name:          "cloud falls back to the NetBird service",
-			managementURL: cloudMgm,
-			want:          types.DefaultBundleURL,
-		},
-		{
-			// The whole point of GHSA-hf99-43rj-h577: no silent hop to a
-			// vendor-controlled destination.
-			name:          "self-hosted with no destination fails closed",
-			managementURL: selfHostedMgm,
-			wantErr:       true,
-		},
-		{
-			name:          "unknown management URL fails closed",
-			managementURL: "",
-			wantErr:       true,
+			// The default stays the service NetBird runs whatever the
+			// deployment: an operator who wants the bundles elsewhere says so,
+			// and until then collecting one and sending it to support works.
+			name: "nothing configured falls back to the NetBird service",
+			want: types.DefaultBundleURL,
 		},
 	}
 
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
-			got, err := ResolveUploadURL(tc.requested, tc.published, tc.managementURL)
-			if tc.wantErr {
-				require.ErrorIs(t, err, ErrNoUploadDestination)
-				assert.Empty(t, got)
-				return
-			}
-			require.NoError(t, err)
-			assert.Equal(t, tc.want, got)
+			assert.Equal(t, tc.want, ResolveUploadURL(tc.requested, tc.published))
 		})
 	}
 }

client/internal/engine.go

@@ -230,9 +230,8 @@ type Engine struct {
 	// debugUploadURL is the debug-bundle upload service the management server
 	// publishes for this deployment, refreshed on every NetbirdConfig update.
 	// Atomic because the bundle paths (remote job, daemon RPC, mobile SDK) read
-	// it off the engine loop. Empty when the deployment publishes none, which is
-	// what makes a self-hosted peer keep its bundle local instead of shipping it
-	// to the upload service NetBird runs.
+	// it off the engine loop. Empty when the deployment publishes none, in which
+	// case the callers fall back to the service NetBird runs.
 	debugUploadURL atomic.Pointer[string]
 
 	clientCtx    context.Context
@@ -1243,8 +1242,8 @@ func (e *Engine) handleDebugUploadUpdate(config *mgmProto.DebugConfig) {
 
 // DebugUploadURL returns the debug-bundle upload service the management server
 // published, or empty when it published none or the engine never synced. The
-// callers treat empty as "no destination from this deployment" and fail closed
-// unless the peer is enrolled with NetBird's cloud; see debug.ResolveUploadURL.
+// callers treat empty as "this deployment names no destination" and fall back to
+// the service NetBird runs; see debug.ResolveUploadURL.
 func (e *Engine) DebugUploadURL() string {
 	if url := e.debugUploadURL.Load(); url != nil {
 		return *url
@@ -1466,10 +1465,8 @@ func (e *Engine) handleBundle(params *mgmProto.BundleParameters) (*mgmProto.JobR
 
 	// Resolve the upload destination: an MDM override, when set, takes
 	// precedence over the job's URL. Both are validated the same way. With
-	// neither, the destination this deployment publishes is used, and only a
-	// peer enrolled with NetBird's cloud falls back to the service NetBird runs
-	// — a self-hosted deployment that named no upload service gets no upload
-	// rather than one that leaves the operator's control sphere.
+	// neither, the destination this deployment publishes is used, and failing
+	// that the service NetBird runs.
 	uploadURL := params.GetUploadUrl()
 	if override := e.config.ProfileConfig.DebugBundleUploadURL; override != "" {
 		log.Infof("using MDM debug bundle upload URL override instead of the management-supplied value")
@@ -1479,10 +1476,7 @@ func (e *Engine) handleBundle(params *mgmProto.BundleParameters) (*mgmProto.JobR
 		return nil, err
 	}
 
-	uploadURL, err = debug.ResolveUploadURL(uploadURL, e.DebugUploadURL(), e.config.ProfileConfig.ManagementURL.String())
-	if err != nil {
-		return nil, err
-	}
+	uploadURL = debug.ResolveUploadURL(uploadURL, e.DebugUploadURL())
 
 	bundleDeps := debug.GeneratorDependencies{
 		InternalConfig: e.config.ProfileConfig,

client/ios/NetBirdSDK/client.go

@@ -298,8 +298,8 @@ func (c *Client) DebugBundle(anonymize bool, anonymizeLevel string) (string, err
 	}
 
 	// Empty unless an engine is running and has synced: a bundle generated with
-	// the client stopped has no management-published destination, so it uploads
-	// only when the peer is enrolled with NetBird's cloud.
+	// the client stopped has no management-published destination and goes to the
+	// service NetBird runs.
 	var publishedUploadURL string
 
 	if cc != nil {
@@ -329,15 +329,9 @@ func (c *Client) DebugBundle(anonymize bool, anonymizeLevel string) (string, err
 		},
 	)
 
-	// Resolved before the bundle is generated: with no destination there is
-	// nothing to hand back to the app, and generating (then deleting) a bundle
-	// nobody can collect is wasted work on the device. An MDM override wins;
-	// otherwise the destination this deployment publishes is used, and only a
-	// peer enrolled with NetBird's cloud falls back to the service NetBird runs.
-	uploadURL, err := debug.ResolveUploadURL(cfg.DebugBundleUploadURL, publishedUploadURL, cfg.ManagementURL.String())
-	if err != nil {
-		return "", err
-	}
+	// An MDM override wins; otherwise the destination this deployment publishes
+	// is used, and failing that the service NetBird runs.
+	uploadURL := debug.ResolveUploadURL(cfg.DebugBundleUploadURL, publishedUploadURL)
 
 	path, err := bundleGenerator.Generate()
 	if err != nil {

client/jobexec/executor.go

@@ -29,12 +29,11 @@ func NewExecutor() *Executor {
 
 // BundleJob generates a debug bundle for a remote job and uploads it to
 // uploadURL, returning the key the management server hands back to whoever asked.
-// The caller resolves uploadURL (see debug.ResolveUploadURL): a job whose
-// deployment names no upload service never reaches here, so there is no
-// fallback destination to pick locally.
+// The caller resolves uploadURL (see debug.ResolveUploadURL), which never yields
+// an empty one, so there is no fallback destination to pick locally.
 func (e *Executor) BundleJob(ctx context.Context, debugBundleDependencies debug.GeneratorDependencies, params debug.BundleConfig, waitForDuration time.Duration, mgmURL, uploadURL string) (string, error) {
 	if uploadURL == "" {
-		return "", debug.ErrNoUploadDestination
+		return "", errors.New("no debug bundle upload destination resolved")
 	}
 
 	if waitForDuration > MaxBundleWaitTime {

client/proto/daemon.pb.go

@@ -2822,10 +2822,8 @@ type DebugBundleRequest struct {
 	AnonymizeLevel string `protobuf:"bytes,8,opt,name=anonymizeLevel,proto3" json:"anonymizeLevel,omitempty"`
 	// upload asks the daemon to upload the bundle. When uploadURL is empty the
 	// daemon resolves the destination itself: the one the management server
-	// publishes, or the service NetBird runs when the peer is enrolled with
-	// NetBird's cloud. A self-hosted deployment that publishes no destination
-	// gets no upload, so a bundle never leaves the operator's control sphere by
-	// default. uploadURL still overrides it, for a privileged caller.
+	// publishes, or else the service NetBird runs. uploadURL still overrides it,
+	// and a host other than the default one requires a privileged caller.
 	Upload        bool `protobuf:"varint,9,opt,name=upload,proto3" json:"upload,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache

client/proto/daemon.proto

@@ -555,10 +555,8 @@ message DebugBundleRequest {
   string anonymizeLevel = 8;
   // upload asks the daemon to upload the bundle. When uploadURL is empty the
   // daemon resolves the destination itself: the one the management server
-  // publishes, or the service NetBird runs when the peer is enrolled with
-  // NetBird's cloud. A self-hosted deployment that publishes no destination
-  // gets no upload, so a bundle never leaves the operator's control sphere by
-  // default. uploadURL still overrides it, for a privileged caller.
+  // publishes, or else the service NetBird runs. uploadURL still overrides it,
+  // and a host other than the default one requires a privileged caller.
   bool upload = 9;
 }
 

client/server/debug.go

@@ -48,11 +48,7 @@ func (s *Server) DebugBundle(callerCtx context.Context, req *proto.DebugBundleRe
 	// it is the operator of this deployment naming their own upload service, and
 	// the peer already trusts that server for its whole configuration. Only a
 	// URL the local caller named goes through requirePrivilegeForUploadURL above.
-	uploadURL, err := debug.ResolveUploadURL(req.GetUploadURL(), publishedUploadURL, managementURL)
-	if err != nil {
-		log.Errorf("cannot upload debug bundle: %v", err)
-		return &proto.DebugBundleResponse{Path: path, UploadFailureReason: err.Error()}, nil
-	}
+	uploadURL := debug.ResolveUploadURL(req.GetUploadURL(), publishedUploadURL)
 
 	// The upload runs without s.mutex held: it does network I/O to a possibly
 	// slow destination and must not block the other RPCs that take the lock. The