Merge pull request #171 from juanfont/force-flag

Added --force flag on node delete

.goreleaser.yml

@@ -20,6 +20,7 @@ builds:
       - -mod=readonly
     ldflags:
       - -s -w -X github.com/juanfont/headscale/cmd/headscale/cli.Version=v{{.Version}}
+
   - id: linux-armhf
     main: ./cmd/headscale/headscale.go
     mod_timestamp: '{{ .CommitTimestamp }}'
@@ -49,9 +50,16 @@ builds:
       - linux
     goarch:
       - amd64
-    goarm:
-      - 6
-      - 7
+    main: ./cmd/headscale/headscale.go
+    mod_timestamp: '{{ .CommitTimestamp }}'
+    ldflags:
+      - -s -w -X github.com/juanfont/headscale/cmd/headscale/cli.Version=v{{.Version}}
+
+  - id: linux-arm64
+    goos:
+      - linux
+    goarch:
+      - arm64
     main: ./cmd/headscale/headscale.go
     mod_timestamp: '{{ .CommitTimestamp }}'
     ldflags:
@@ -63,6 +71,7 @@ archives:
       - darwin-amd64
       - linux-armhf
       - linux-amd64
+      - linux-arm64
     name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
     format: binary
 

api.go

@@ -395,6 +395,9 @@ func (h *Headscale) handleAuthKey(c *gin.Context, db *gorm.DB, idKey wgkey.Key,
 	m.RegisterMethod = "authKey"
 	db.Save(&m)
 
+	pak.Used = true
+	db.Save(&pak)
+
 	resp.MachineAuthorized = true
 	resp.User = *pak.Namespace.toUser()
 	respBody, err := encode(resp, &idKey, h.privateKey)

cmd/headscale/cli/nodes.go

@@ -129,6 +129,7 @@ var deleteNodeCmd = &cobra.Command{
 		return nil
 	},
 	Run: func(cmd *cobra.Command, args []string) {
+		output, _ := cmd.Flags().GetString("output")
 		h, err := getHeadscaleApp()
 		if err != nil {
 			log.Fatalf("Error initializing: %s", err)
@@ -143,21 +144,32 @@ var deleteNodeCmd = &cobra.Command{
 		}
 
 		confirm := false
-		prompt := &survey.Confirm{
-			Message: fmt.Sprintf("Do you want to remove the node %s?", m.Name),
-		}
-		err = survey.AskOne(prompt, &confirm)
-		if err != nil {
-			return
+		force, _ := cmd.Flags().GetBool("force")
+		if !force {
+			prompt := &survey.Confirm{
+				Message: fmt.Sprintf("Do you want to remove the node %s?", m.Name),
+			}
+			err = survey.AskOne(prompt, &confirm)
+			if err != nil {
+				return
+			}
 		}
 
-		if confirm {
+		if confirm || force {
 			err = h.DeleteMachine(m)
+			if strings.HasPrefix(output, "json") {
+				JsonOutput(map[string]string{"Result": "Node deleted"}, err, output)
+				return
+			}
 			if err != nil {
 				log.Fatalf("Error deleting node: %s", err)
 			}
 			fmt.Printf("Node deleted\n")
 		} else {
+			if strings.HasPrefix(output, "json") {
+				JsonOutput(map[string]string{"Result": "Node not deleted"}, err, output)
+				return
+			}
 			fmt.Printf("Node not deleted\n")
 		}
 	},

cmd/headscale/cli/preauthkeys.go

@@ -57,7 +57,7 @@ var listPreAuthKeys = &cobra.Command{
 			return
 		}
 
-		d := pterm.TableData{{"ID", "Key", "Reusable", "Ephemeral", "Expiration", "Created"}}
+		d := pterm.TableData{{"ID", "Key", "Reusable", "Ephemeral", "Used", "Expiration", "Created"}}
 		for _, k := range *keys {
 			expiration := "-"
 			if k.Expiration != nil {
@@ -76,6 +76,7 @@ var listPreAuthKeys = &cobra.Command{
 				k.Key,
 				reusable,
 				strconv.FormatBool(k.Ephemeral),
+				fmt.Sprintf("%v", k.Used),
 				expiration,
 				k.CreatedAt.Format("2006-01-02 15:04:05"),
 			})
@@ -130,7 +131,7 @@ var createPreAuthKeyCmd = &cobra.Command{
 }
 
 var expirePreAuthKeyCmd = &cobra.Command{
-	Use:   "expire",
+	Use:   "expire KEY",
 	Short: "Expire a preauthkey",
 	Args: func(cmd *cobra.Command, args []string) error {
 		if len(args) < 1 {
@@ -152,6 +153,10 @@ var expirePreAuthKeyCmd = &cobra.Command{
 
 		k, err := h.GetPreAuthKey(n, args[0])
 		if err != nil {
+			if strings.HasPrefix(o, "json") {
+				JsonOutput(k, err, o)
+				return
+			}
 			log.Fatalf("Error getting the key: %s", err)
 		}
 

cmd/headscale/cli/root.go

@@ -9,6 +9,7 @@ import (
 
 func init() {
 	rootCmd.PersistentFlags().StringP("output", "o", "", "Output format. Empty for human-readable, 'json' or 'json-line'")
+	rootCmd.PersistentFlags().Bool("force", false, "Disable prompts and forces the execution")
 }
 
 var rootCmd = &cobra.Command{

cmd/headscale/cli/utils.go

@@ -262,3 +262,12 @@ func JsonOutput(result interface{}, errResult error, outputFormat string) {
 	}
 	fmt.Println(string(j))
 }
+
+func HasJsonOutputFlag() bool {
+	for _, arg := range os.Args {
+		if arg == "json" || arg == "json-line" {
+			return true
+		}
+	}
+	return false
+}

cmd/headscale/headscale.go

@@ -62,7 +62,8 @@ func main() {
 		zerolog.SetGlobalLevel(zerolog.DebugLevel)
 	}
 
-	if !viper.GetBool("disable_check_updates") {
+	jsonOutput := cli.HasJsonOutputFlag()
+	if !viper.GetBool("disable_check_updates") && !jsonOutput {
 		if (runtime.GOOS == "linux" || runtime.GOOS == "darwin") && cli.Version != "dev" {
 			githubTag := &latest.GithubTag{
 				Owner:      "juanfont",

integration_test.go

@@ -504,43 +504,43 @@ func (s *IntegrationTestSuite) TestSharedNodes() {
 		assert.Contains(s.T(), result, hostname)
 	}
 
-	// TODO(kradalby): Figure out why these connections are not set up
-	// // TODO: See if we can have a more deterministic wait here.
-	// time.Sleep(100 * time.Second)
+	// TODO(juanfont): We have to find out why do we need to wait
+	time.Sleep(100 * time.Second) // Wait for the nodes to receive updates
 
-	// mainIps, err := getIPs(main.tailscales)
-	// assert.Nil(s.T(), err)
+	mainIps, err := getIPs(main.tailscales)
+	assert.Nil(s.T(), err)
 
-	// sharedIps, err := getIPs(shared.tailscales)
-	// assert.Nil(s.T(), err)
+	sharedIps, err := getIPs(shared.tailscales)
+	assert.Nil(s.T(), err)
 
-	// for hostname, tailscale := range main.tailscales {
-	// 	for peername, ip := range sharedIps {
-	// 		s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
-	// 			// We currently cant ping ourselves, so skip that.
-	// 			if peername != hostname {
-	// 				// We are only interested in "direct ping" which means what we
-	// 				// might need a couple of more attempts before reaching the node.
-	// 				command := []string{
-	// 					"tailscale", "ping",
-	// 					"--timeout=1s",
-	// 					"--c=20",
-	// 					"--until-direct=true",
-	// 					ip.String(),
-	// 				}
+	for hostname, tailscale := range main.tailscales {
+		for peername, ip := range sharedIps {
+			s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
+				// We currently cant ping ourselves, so skip that.
+				if peername != hostname {
+					// We are only interested in "direct ping" which means what we
+					// might need a couple of more attempts before reaching the node.
+					command := []string{
+						"tailscale", "ping",
+						"--timeout=15s",
+						"--c=20",
+						"--until-direct=true",
+						ip.String(),
+					}
 
-	// 				fmt.Printf("Pinging from %s (%s) to %s (%s)\n", hostname, mainIps[hostname], peername, ip)
-	// 				result, err := executeCommand(
-	// 					&tailscale,
-	// 					command,
-	// 				)
-	// 				assert.Nil(t, err)
-	// 				fmt.Printf("Result for %s: %s\n", hostname, result)
-	// 				assert.Contains(t, result, "pong")
-	// 			}
-	// 		})
-	// 	}
-	// }
+					fmt.Printf("Pinging from %s (%s) to %s (%s)\n", hostname, mainIps[hostname], peername, ip)
+					result, err := executeCommand(
+						&tailscale,
+						command,
+						[]string{},
+					)
+					assert.Nil(t, err)
+					fmt.Printf("Result for %s: %s\n", hostname, result)
+					assert.Contains(t, result, "pong")
+				}
+			})
+		}
+	}
 }
 
 func (s *IntegrationTestSuite) TestTailDrop() {

machine.go

@@ -78,13 +78,13 @@ func (h *Headscale) getDirectPeers(m *Machine) (Machines, error) {
 	return machines, nil
 }
 
+// getShared fetches machines that are shared to the `Namespace` of the machine we are getting peers for
 func (h *Headscale) getShared(m *Machine) (Machines, error) {
 	log.Trace().
 		Str("func", "getShared").
 		Str("machine", m.Name).
 		Msg("Finding shared peers")
 
-	// We fetch here machines that are shared to the `Namespace` of the machine we are getting peers for
 	sharedMachines := []SharedMachine{}
 	if err := h.db.Preload("Namespace").Preload("Machine").Where("namespace_id = ?",
 		m.NamespaceID).Find(&sharedMachines).Error; err != nil {
@@ -105,6 +105,37 @@ func (h *Headscale) getShared(m *Machine) (Machines, error) {
 	return peers, nil
 }
 
+// getSharedTo fetches the machines of the namespaces this machine is shared in
+func (h *Headscale) getSharedTo(m *Machine) (Machines, error) {
+	log.Trace().
+		Str("func", "getSharedTo").
+		Str("machine", m.Name).
+		Msg("Finding peers in namespaces this machine is shared with")
+
+	sharedMachines := []SharedMachine{}
+	if err := h.db.Preload("Namespace").Preload("Machine").Where("machine_id = ?",
+		m.ID).Find(&sharedMachines).Error; err != nil {
+		return Machines{}, err
+	}
+
+	peers := make(Machines, 0)
+	for _, sharedMachine := range sharedMachines {
+		namespaceMachines, err := h.ListMachinesInNamespace(sharedMachine.Namespace.Name)
+		if err != nil {
+			return Machines{}, err
+		}
+		peers = append(peers, *namespaceMachines...)
+	}
+
+	sort.Slice(peers, func(i, j int) bool { return peers[i].ID < peers[j].ID })
+
+	log.Trace().
+		Str("func", "getSharedTo").
+		Str("machine", m.Name).
+		Msgf("Found peers we are shared with: %s", peers.String())
+	return peers, nil
+}
+
 func (h *Headscale) getPeers(m *Machine) (Machines, error) {
 	direct, err := h.getDirectPeers(m)
 	if err != nil {
@@ -118,13 +149,24 @@ func (h *Headscale) getPeers(m *Machine) (Machines, error) {
 	shared, err := h.getShared(m)
 	if err != nil {
 		log.Error().
-			Str("func", "getDirectPeers").
+			Str("func", "getShared").
+			Err(err).
+			Msg("Cannot fetch peers")
+		return Machines{}, err
+	}
+
+	sharedTo, err := h.getSharedTo(m)
+	if err != nil {
+		log.Error().
+			Str("func", "sharedTo").
 			Err(err).
 			Msg("Cannot fetch peers")
 		return Machines{}, err
 	}
 
 	peers := append(direct, shared...)
+	peers = append(peers, sharedTo...)
+
 	sort.Slice(peers, func(i, j int) bool { return peers[i].ID < peers[j].ID })
 
 	log.Trace().
@@ -179,6 +221,11 @@ func (h *Headscale) UpdateMachine(m *Machine) error {
 
 // DeleteMachine softs deletes a Machine from the database
 func (h *Headscale) DeleteMachine(m *Machine) error {
+	err := h.RemoveSharedMachineFromAllNamespaces(m)
+	if err != nil && err != errorMachineNotShared {
+		return err
+	}
+
 	m.Registered = false
 	namespaceID := m.NamespaceID
 	h.db.Save(&m) // we mark it as unregistered, just in case
@@ -191,10 +238,16 @@ func (h *Headscale) DeleteMachine(m *Machine) error {
 
 // HardDeleteMachine hard deletes a Machine from the database
 func (h *Headscale) HardDeleteMachine(m *Machine) error {
+	err := h.RemoveSharedMachineFromAllNamespaces(m)
+	if err != nil && err != errorMachineNotShared {
+		return err
+	}
+
 	namespaceID := m.NamespaceID
 	if err := h.db.Unscoped().Delete(&m).Error; err != nil {
 		return err
 	}
+
 	return h.RequestMapUpdates(namespaceID)
 }
 

namespaces.go

@@ -91,7 +91,7 @@ func (h *Headscale) ListMachinesInNamespace(name string) (*[]Machine, error) {
 	}
 
 	machines := []Machine{}
-	if err := h.db.Preload("AuthKey").Preload("Namespace").Where(&Machine{NamespaceID: n.ID}).Find(&machines).Error; err != nil {
+	if err := h.db.Preload("AuthKey").Preload("AuthKey.Namespace").Preload("Namespace").Where(&Machine{NamespaceID: n.ID}).Find(&machines).Error; err != nil {
 		return nil, err
 	}
 	return &machines, nil

preauth_keys.go

@@ -11,7 +11,7 @@ import (
 
 const errorAuthKeyNotFound = Error("AuthKey not found")
 const errorAuthKeyExpired = Error("AuthKey expired")
-const errorAuthKeyNotReusableAlreadyUsed = Error("AuthKey not reusable already used")
+const errSingleUseAuthKeyHasBeenUsed = Error("AuthKey has already been used")
 
 // PreAuthKey describes a pre-authorization key usable in a particular namespace
 type PreAuthKey struct {
@@ -21,6 +21,7 @@ type PreAuthKey struct {
 	Namespace   Namespace
 	Reusable    bool
 	Ephemeral   bool `gorm:"default:false"`
+	Used        bool `gorm:"default:false"`
 
 	CreatedAt  *time.Time
 	Expiration *time.Time
@@ -110,11 +111,10 @@ func (h *Headscale) checkKeyValidity(k string) (*PreAuthKey, error) {
 		return nil, err
 	}
 
-	if len(machines) != 0 {
-		return nil, errorAuthKeyNotReusableAlreadyUsed
+	if len(machines) != 0 || pak.Used {
+		return nil, errSingleUseAuthKeyHasBeenUsed
 	}
 
-	// missing here validation on current usage
 	return &pak, nil
 }
 

preauth_keys_test.go

@@ -87,7 +87,7 @@ func (*Suite) TestAlreadyUsedKey(c *check.C) {
 	h.db.Save(&m)
 
 	p, err := h.checkKeyValidity(pak.Key)
-	c.Assert(err, check.Equals, errorAuthKeyNotReusableAlreadyUsed)
+	c.Assert(err, check.Equals, errSingleUseAuthKeyHasBeenUsed)
 	c.Assert(p, check.IsNil)
 }
 
@@ -180,3 +180,16 @@ func (*Suite) TestExpirePreauthKey(c *check.C) {
 	c.Assert(err, check.Equals, errorAuthKeyExpired)
 	c.Assert(p, check.IsNil)
 }
+
+func (*Suite) TestNotReusableMarkedAsUsed(c *check.C) {
+	n, err := h.CreateNamespace("test6")
+	c.Assert(err, check.IsNil)
+
+	pak, err := h.CreatePreAuthKey(n.Name, false, false, nil)
+	c.Assert(err, check.IsNil)
+	pak.Used = true
+	h.db.Save(&pak)
+
+	_, err = h.checkKeyValidity(pak.Key)
+	c.Assert(err, check.Equals, errSingleUseAuthKeyHasBeenUsed)
+}

sharing.go

@@ -4,6 +4,7 @@ import "gorm.io/gorm"
 
 const errorSameNamespace = Error("Destination namespace same as origin")
 const errorMachineAlreadyShared = Error("Node already shared to this namespace")
+const errorMachineNotShared = Error("Machine not shared to this namespace")
 
 // SharedMachine is a join table to support sharing nodes between namespaces
 type SharedMachine struct {
@@ -35,3 +36,13 @@ func (h *Headscale) AddSharedMachineToNamespace(m *Machine, ns *Namespace) error
 
 	return nil
 }
+
+// RemoveSharedMachineFromAllNamespaces removes a machine as a shared node from all namespaces
+func (h *Headscale) RemoveSharedMachineFromAllNamespaces(m *Machine) error {
+	sharedMachine := SharedMachine{}
+	if result := h.db.Where("machine_id = ?", m.ID).Unscoped().Delete(&sharedMachine); result.Error != nil {
+		return result.Error
+	}
+
+	return nil
+}

sharing_test.go

@@ -274,7 +274,7 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	c.Assert(err, check.NotNil)
 
 	m1 := &Machine{
-		ID:             0,
+		ID:             1,
 		MachineKey:     "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
 		NodeKey:        "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
 		DiscoKey:       "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
@@ -291,7 +291,7 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	m2 := &Machine{
-		ID:             1,
+		ID:             2,
 		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
@@ -308,7 +308,7 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	m3 := &Machine{
-		ID:             2,
+		ID:             3,
 		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
@@ -325,7 +325,7 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	m4 := &Machine{
-		ID:             3,
+		ID:             4,
 		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
 		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
@@ -341,6 +341,129 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	_, err = h.GetMachine(n1.Name, m4.Name)
 	c.Assert(err, check.IsNil)
 
+	p1s, err := h.getPeers(m1)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(p1s), check.Equals, 1) // node1 can see node4
+	c.Assert(p1s[0].Name, check.Equals, "test_get_shared_nodes_4")
+
+	err = h.AddSharedMachineToNamespace(m2, n1)
+	c.Assert(err, check.IsNil)
+
+	p1sAfter, err := h.getPeers(m1)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(p1sAfter), check.Equals, 2) // node1 can see node2 (shared) and node4 (same namespace)
+	c.Assert(p1sAfter[0].Name, check.Equals, "test_get_shared_nodes_2")
+	c.Assert(p1sAfter[1].Name, check.Equals, "test_get_shared_nodes_4")
+
+	node1shared, err := h.getShared(m1)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(node1shared), check.Equals, 1) // node1 can see node2 as shared
+	c.Assert(node1shared[0].Name, check.Equals, "test_get_shared_nodes_2")
+
+	pAlone, err := h.getPeers(m3)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(pAlone), check.Equals, 0) // node3 is alone
+
+	pSharedTo, err := h.getPeers(m2)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(pSharedTo), check.Equals, 2) // node2 should see node1 (sharedTo) and node4 (sharedTo), as is shared in namespace1
+	c.Assert(pSharedTo[0].Name, check.Equals, "test_get_shared_nodes_1")
+	c.Assert(pSharedTo[1].Name, check.Equals, "test_get_shared_nodes_4")
+}
+
+func (s *Suite) TestDeleteSharedMachine(c *check.C) {
+	n1, err := h.CreateNamespace("shared1")
+	c.Assert(err, check.IsNil)
+
+	n2, err := h.CreateNamespace("shared2")
+	c.Assert(err, check.IsNil)
+
+	n3, err := h.CreateNamespace("shared3")
+	c.Assert(err, check.IsNil)
+
+	pak1n1, err := h.CreatePreAuthKey(n1.Name, false, false, nil)
+	c.Assert(err, check.IsNil)
+
+	pak2n2, err := h.CreatePreAuthKey(n2.Name, false, false, nil)
+	c.Assert(err, check.IsNil)
+
+	pak3n3, err := h.CreatePreAuthKey(n3.Name, false, false, nil)
+	c.Assert(err, check.IsNil)
+
+	pak4n1, err := h.CreatePreAuthKey(n1.Name, false, false, nil)
+	c.Assert(err, check.IsNil)
+
+	_, err = h.GetMachine(n1.Name, "test_get_shared_nodes_1")
+	c.Assert(err, check.NotNil)
+
+	m1 := &Machine{
+		ID:             1,
+		MachineKey:     "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
+		NodeKey:        "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
+		DiscoKey:       "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
+		Name:           "test_get_shared_nodes_1",
+		NamespaceID:    n1.ID,
+		Registered:     true,
+		RegisterMethod: "authKey",
+		IPAddress:      "100.64.0.1",
+		AuthKeyID:      uint(pak1n1.ID),
+	}
+	h.db.Save(m1)
+
+	_, err = h.GetMachine(n1.Name, m1.Name)
+	c.Assert(err, check.IsNil)
+
+	m2 := &Machine{
+		ID:             2,
+		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		Name:           "test_get_shared_nodes_2",
+		NamespaceID:    n2.ID,
+		Registered:     true,
+		RegisterMethod: "authKey",
+		IPAddress:      "100.64.0.2",
+		AuthKeyID:      uint(pak2n2.ID),
+	}
+	h.db.Save(m2)
+
+	_, err = h.GetMachine(n2.Name, m2.Name)
+	c.Assert(err, check.IsNil)
+
+	m3 := &Machine{
+		ID:             3,
+		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		Name:           "test_get_shared_nodes_3",
+		NamespaceID:    n3.ID,
+		Registered:     true,
+		RegisterMethod: "authKey",
+		IPAddress:      "100.64.0.3",
+		AuthKeyID:      uint(pak3n3.ID),
+	}
+	h.db.Save(m3)
+
+	_, err = h.GetMachine(n3.Name, m3.Name)
+	c.Assert(err, check.IsNil)
+
+	m4 := &Machine{
+		ID:             4,
+		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
+		Name:           "test_get_shared_nodes_4",
+		NamespaceID:    n1.ID,
+		Registered:     true,
+		RegisterMethod: "authKey",
+		IPAddress:      "100.64.0.4",
+		AuthKeyID:      uint(pak4n1.ID),
+	}
+	h.db.Save(m4)
+
+	_, err = h.GetMachine(n1.Name, m4.Name)
+	c.Assert(err, check.IsNil)
+
 	p1s, err := h.getPeers(m1)
 	c.Assert(err, check.IsNil)
 	c.Assert(len(p1s), check.Equals, 1) // nodes 1 and 4
@@ -363,4 +486,15 @@ func (s *Suite) TestComplexSharingAcrossNamespaces(c *check.C) {
 	pAlone, err := h.getPeers(m3)
 	c.Assert(err, check.IsNil)
 	c.Assert(len(pAlone), check.Equals, 0) // node 3 is alone
+
+	sharedMachines, err := h.ListSharedMachinesInNamespace(n1.Name)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(*sharedMachines), check.Equals, 1)
+
+	err = h.DeleteMachine(m2)
+	c.Assert(err, check.IsNil)
+
+	sharedMachines, err = h.ListSharedMachinesInNamespace(n1.Name)
+	c.Assert(err, check.IsNil)
+	c.Assert(len(*sharedMachines), check.Equals, 0)
 }