fix route table migration wiping routes 0.22 -> 0.23 (#2076)

.github/workflows/test.yml

@@ -34,4 +34,4 @@ jobs:
 
       - name: Run tests
         if: steps.changed-files.outputs.files == 'true'
-        run: nix develop --check
+        run: nix develop --command -- gotestsum

hscontrol/db/db.go

@@ -51,8 +51,8 @@ func NewHeadscaleDatabase(
 		dbConn,
 		gormigrate.DefaultOptions,
 		[]*gormigrate.Migration{
-			// New migrations should be added as transactions at the end of this list.
-			// The initial commit here is quite messy, completely out of order and
+			// New migrations must be added as transactions at the end of this list.
+			// The initial migration here is quite messy, completely out of order and
 			// has no versioning and is the tech debt of not having versioned migrations
 			// prior to this point. This first migration is all DB changes to bring a DB
 			// up to 0.23.0.
@@ -123,9 +123,21 @@ func NewHeadscaleDatabase(
 						}
 					}
 
-					err = tx.AutoMigrate(&types.Route{})
-					if err != nil {
-						return err
+					// Only run automigrate Route table if it does not exist. It has only been
+					// changed ones, when machines where renamed to nodes, which is covered
+					// further up. This whole initial integration is a mess and if AutoMigrate
+					// is ran on a 0.22 to 0.23 update, it will wipe all the routes.
+					if tx.Migrator().HasTable(&types.Route{}) && tx.Migrator().HasTable(&types.Node{}) {
+						err := tx.Exec("delete from routes where node_id not in (select id from nodes)").Error
+						if err != nil {
+							return err
+						}
+					}
+					if !tx.Migrator().HasTable(&types.Route{}) {
+						err = tx.AutoMigrate(&types.Route{})
+						if err != nil {
+							return err
+						}
 					}
 
 					err = tx.AutoMigrate(&types.Node{})

hscontrol/db/db_test.go

@@ -0,0 +1,168 @@
+package db
+
+import (
+	"fmt"
+	"io"
+	"net/netip"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+	"github.com/juanfont/headscale/hscontrol/types"
+	"github.com/stretchr/testify/assert"
+	"gorm.io/gorm"
+)
+
+func TestMigrations(t *testing.T) {
+	ipp := func(p string) types.IPPrefix {
+		return types.IPPrefix(netip.MustParsePrefix(p))
+	}
+	r := func(id uint64, p string, a, e, i bool) types.Route {
+		return types.Route{
+			NodeID:     id,
+			Prefix:     ipp(p),
+			Advertised: a,
+			Enabled:    e,
+			IsPrimary:  i,
+		}
+	}
+	tests := []struct {
+		dbPath   string
+		wantFunc func(*testing.T, *HSDatabase)
+		wantErr  string
+	}{
+		{
+			dbPath: "testdata/0-22-3-to-0-23-0-routes-are-dropped-2063.sqlite",
+			wantFunc: func(t *testing.T, h *HSDatabase) {
+				routes, err := Read(h.DB, func(rx *gorm.DB) (types.Routes, error) {
+					return GetRoutes(rx)
+				})
+				assert.NoError(t, err)
+
+				assert.Len(t, routes, 10)
+				want := types.Routes{
+					r(1, "0.0.0.0/0", true, true, false),
+					r(1, "::/0", true, true, false),
+					r(1, "10.9.110.0/24", true, true, true),
+					r(26, "172.100.100.0/24", true, true, true),
+					r(26, "172.100.100.0/24", true, false, false),
+					r(31, "0.0.0.0/0", true, true, false),
+					r(31, "0.0.0.0/0", true, false, false),
+					r(31, "::/0", true, true, false),
+					r(31, "::/0", true, false, false),
+					r(32, "192.168.0.24/32", true, true, true),
+				}
+				if diff := cmp.Diff(want, routes, cmpopts.IgnoreFields(types.Route{}, "Model", "Node"), cmp.Comparer(func(x, y types.IPPrefix) bool {
+					return x == y
+				})); diff != "" {
+					t.Errorf("TestMigrations() mismatch (-want +got):\n%s", diff)
+				}
+			},
+		},
+		{
+			dbPath: "testdata/0-22-3-to-0-23-0-routes-fail-foreign-key-2076.sqlite",
+			wantFunc: func(t *testing.T, h *HSDatabase) {
+				routes, err := Read(h.DB, func(rx *gorm.DB) (types.Routes, error) {
+					return GetRoutes(rx)
+				})
+				assert.NoError(t, err)
+
+				assert.Len(t, routes, 4)
+				want := types.Routes{
+					// These routes exists, but have no nodes associated with them
+					// when the migration starts.
+					// r(1, "0.0.0.0/0", true, true, false),
+					// r(1, "::/0", true, true, false),
+					// r(3, "0.0.0.0/0", true, true, false),
+					// r(3, "::/0", true, true, false),
+					// r(5, "0.0.0.0/0", true, true, false),
+					// r(5, "::/0", true, true, false),
+					// r(6, "0.0.0.0/0", true, true, false),
+					// r(6, "::/0", true, true, false),
+					// r(6, "10.0.0.0/8", true, false, false),
+					// r(7, "0.0.0.0/0", true, true, false),
+					// r(7, "::/0", true, true, false),
+					// r(7, "10.0.0.0/8", true, false, false),
+					// r(9, "0.0.0.0/0", true, true, false),
+					// r(9, "::/0", true, true, false),
+					// r(9, "10.0.0.0/8", true, true, false),
+					// r(11, "0.0.0.0/0", true, true, false),
+					// r(11, "::/0", true, true, false),
+					// r(11, "10.0.0.0/8", true, true, true),
+					// r(12, "0.0.0.0/0", true, true, false),
+					// r(12, "::/0", true, true, false),
+					// r(12, "10.0.0.0/8", true, false, false),
+					//
+					// These nodes exists, so routes should be kept.
+					r(13, "10.0.0.0/8", true, false, false),
+					r(13, "0.0.0.0/0", true, true, false),
+					r(13, "::/0", true, true, false),
+					r(13, "10.18.80.2/32", true, true, true),
+				}
+				if diff := cmp.Diff(want, routes, cmpopts.IgnoreFields(types.Route{}, "Model", "Node"), cmp.Comparer(func(x, y types.IPPrefix) bool {
+					return x == y
+				})); diff != "" {
+					t.Errorf("TestMigrations() mismatch (-want +got):\n%s", diff)
+				}
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.dbPath, func(t *testing.T) {
+			dbPath, err := testCopyOfDatabase(tt.dbPath)
+			if err != nil {
+				t.Fatalf("copying db for test: %s", err)
+			}
+
+			hsdb, err := NewHeadscaleDatabase(types.DatabaseConfig{
+				Type: "sqlite3",
+				Sqlite: types.SqliteConfig{
+					Path: dbPath,
+				},
+			}, "")
+			if err != nil && tt.wantErr != err.Error() {
+				t.Errorf("TestMigrations() unexpected error = %v, wantErr %v", err, tt.wantErr)
+			}
+
+			if tt.wantFunc != nil {
+				tt.wantFunc(t, hsdb)
+			}
+		})
+	}
+}
+
+func testCopyOfDatabase(src string) (string, error) {
+	sourceFileStat, err := os.Stat(src)
+	if err != nil {
+		return "", err
+	}
+
+	if !sourceFileStat.Mode().IsRegular() {
+		return "", fmt.Errorf("%s is not a regular file", src)
+	}
+
+	source, err := os.Open(src)
+	if err != nil {
+		return "", err
+	}
+	defer source.Close()
+
+	tmpDir, err := os.MkdirTemp("", "hsdb-test-*")
+	if err != nil {
+		return "", err
+	}
+
+	fn := filepath.Base(src)
+	dst := filepath.Join(tmpDir, fn)
+
+	destination, err := os.Create(dst)
+	if err != nil {
+		return "", err
+	}
+	defer destination.Close()
+	_, err = io.Copy(destination, source)
+	return dst, err
+}

hscontrol/db/node.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/netip"
 	"sort"
+	"sync"
 	"time"
 
 	"github.com/juanfont/headscale/hscontrol/types"
@@ -12,7 +13,6 @@ import (
 	"github.com/patrickmn/go-cache"
 	"github.com/puzpuzpuz/xsync/v3"
 	"github.com/rs/zerolog/log"
-	"github.com/sasha-s/go-deadlock"
 	"gorm.io/gorm"
 	"tailscale.com/tailcfg"
 	"tailscale.com/types/key"
@@ -724,7 +724,7 @@ func ExpireExpiredNodes(tx *gorm.DB,
 // It is used to delete ephemeral nodes that have disconnected and should be
 // cleaned up.
 type EphemeralGarbageCollector struct {
-	mu deadlock.Mutex
+	mu sync.Mutex
 
 	deleteFunc  func(types.NodeID)
 	toBeDeleted map[types.NodeID]*time.Timer
@@ -752,10 +752,9 @@ func (e *EphemeralGarbageCollector) Close() {
 // Schedule schedules a node for deletion after the expiry duration.
 func (e *EphemeralGarbageCollector) Schedule(nodeID types.NodeID, expiry time.Duration) {
 	e.mu.Lock()
-	defer e.mu.Unlock()
-
 	timer := time.NewTimer(expiry)
 	e.toBeDeleted[nodeID] = timer
+	e.mu.Unlock()
 
 	go func() {
 		select {

hscontrol/db/node_test.go

@@ -609,12 +609,14 @@ func TestEphemeralGarbageCollectorOrder(t *testing.T) {
 	})
 	go e.Start()
 
-	e.Schedule(1, 1*time.Second)
-	e.Schedule(2, 2*time.Second)
-	e.Schedule(3, 3*time.Second)
-	e.Schedule(4, 4*time.Second)
-	e.Cancel(2)
-	e.Cancel(4)
+	go e.Schedule(1, 1*time.Second)
+	go e.Schedule(2, 2*time.Second)
+	go e.Schedule(3, 3*time.Second)
+	go e.Schedule(4, 4*time.Second)
+
+	time.Sleep(time.Second)
+	go e.Cancel(2)
+	go e.Cancel(4)
 
 	time.Sleep(6 * time.Second)
 

hscontrol/util/test.go

@@ -4,7 +4,9 @@ import (
 	"net/netip"
 
 	"github.com/google/go-cmp/cmp"
+	"tailscale.com/types/ipproto"
 	"tailscale.com/types/key"
+	"tailscale.com/types/views"
 )
 
 var PrefixComparer = cmp.Comparer(func(x, y netip.Prefix) bool {
@@ -31,6 +33,8 @@ var DkeyComparer = cmp.Comparer(func(x, y key.DiscoPublic) bool {
 	return x.String() == y.String()
 })
 
+var ViewSliceIPProtoComparer = cmp.Comparer(func(a, b views.Slice[ipproto.Proto]) bool { return views.SliceEqual(a, b) })
+
 var Comparers []cmp.Option = []cmp.Option{
-	IPComparer, PrefixComparer, AddrPortComparer, MkeyComparer, NkeyComparer, DkeyComparer,
+	IPComparer, PrefixComparer, AddrPortComparer, MkeyComparer, NkeyComparer, DkeyComparer, ViewSliceIPProtoComparer,
 }

integration/route_test.go

@@ -1170,7 +1170,7 @@ func TestSubnetRouteACL(t *testing.T) {
 		},
 	}
 
-	if diff := cmp.Diff(wantClientFilter, clientNm.PacketFilter, util.PrefixComparer); diff != "" {
+	if diff := cmp.Diff(wantClientFilter, clientNm.PacketFilter, util.ViewSliceIPProtoComparer, util.PrefixComparer); diff != "" {
 		t.Errorf("Client (%s) filter, unexpected result (-want +got):\n%s", client.Hostname(), diff)
 	}
 
@@ -1220,7 +1220,7 @@ func TestSubnetRouteACL(t *testing.T) {
 		},
 	}
 
-	if diff := cmp.Diff(wantSubnetFilter, subnetNm.PacketFilter, util.PrefixComparer); diff != "" {
+	if diff := cmp.Diff(wantSubnetFilter, subnetNm.PacketFilter, util.ViewSliceIPProtoComparer, util.PrefixComparer); diff != "" {
 		t.Errorf("Subnet (%s) filter, unexpected result (-want +got):\n%s", subRouter1.Hostname(), diff)
 	}
 }