Adding SQLite support

.gitignore

@@ -17,3 +17,4 @@
 /headscale
 config.json
 *.key
+/db.sqlite

README.md

@@ -44,7 +44,7 @@ Suggestions/PRs welcomed!
   make
   ```
 
-2. Get yourself a PostgreSQL DB running (yes, [I know](https://tailscale.com/blog/an-unlikely-database-migration/))
+2. (Optional, you can also use SQLite) Get yourself a PostgreSQL DB running
 
   ```shell
   docker run --name headscale -e POSTGRES_DB=headscale -e \
@@ -55,7 +55,12 @@ Suggestions/PRs welcomed!
   ```shell
   wg genkey > private.key
   wg pubkey < private.key > public.key  # not needed
-  cp config.json.example config.json
+
+  # Postgres
+  cp config.json.postgres.example config.json
+  # or
+  # SQLite
+  cp config.json.sqlite.example config.json
   ```
 
 4. Create a namespace (equivalent to a user in tailscale.com)

api.go

@@ -279,12 +279,14 @@ func (h *Headscale) keepAlive(cancel chan []byte, pollData chan []byte, mKey wgc
 			return
 
 		default:
+			h.pollMu.Lock()
 			data, err := h.getMapKeepAliveResponse(mKey, req, m)
 			if err != nil {
 				log.Printf("Error generating the keep alive msg: %s", err)
 				return
 			}
 			pollData <- *data
+			h.pollMu.Unlock()
 			time.Sleep(60 * time.Second)
 		}
 	}

app.go

@@ -22,6 +22,8 @@ type Config struct {
 	PrivateKeyPath string
 	DerpMap        *tailcfg.DERPMap
 
+	DBtype string
+	DBpath string
 	DBhost string
 	DBport int
 	DBname string
@@ -60,11 +62,22 @@ func NewHeadscale(cfg Config) (*Headscale, error) {
 		return nil, err
 	}
 	pubKey := privKey.Public()
+
+	var dbString string
+	switch cfg.DBtype {
+	case "postgres":
+		dbString = fmt.Sprintf("host=%s port=%d dbname=%s user=%s password=%s sslmode=disable", cfg.DBhost,
+			cfg.DBport, cfg.DBname, cfg.DBuser, cfg.DBpass)
+	case "sqlite3":
+		dbString = cfg.DBpath
+	default:
+		return nil, errors.New("Unsupported DB")
+	}
+
 	h := Headscale{
-		cfg:    cfg,
-		dbType: "postgres",
-		dbString: fmt.Sprintf("host=%s port=%d dbname=%s user=%s password=%s sslmode=disable", cfg.DBhost,
-			cfg.DBport, cfg.DBname, cfg.DBuser, cfg.DBpass),
+		cfg:        cfg,
+		dbType:     cfg.DBtype,
+		dbString:   dbString,
 		privateKey: privKey,
 		publicKey:  &pubKey,
 	}

cmd/headscale/cli/utils.go

@@ -22,10 +22,10 @@ type ErrorOutput struct {
 func absPath(path string) string {
 	// If a relative path is provided, prefix it with the the directory where
 	// the config file was found.
-	if (path != "") && !strings.HasPrefix(path, "/") {
+	if (path != "") && !strings.HasPrefix(path, string(os.PathSeparator)) {
 		dir, _ := filepath.Split(viper.ConfigFileUsed())
 		if dir != "" {
-			path = dir + "/" + path
+			path = filepath.Join(dir, path)
 		}
 	}
 	return path
@@ -43,6 +43,8 @@ func getHeadscaleApp() (*headscale.Headscale, error) {
 		PrivateKeyPath: absPath(viper.GetString("private_key_path")),
 		DerpMap:        derpMap,
 
+		DBtype: viper.GetString("db_type"),
+		DBpath: absPath(viper.GetString("db_path")),
 		DBhost: viper.GetString("db_host"),
 		DBport: viper.GetInt("db_port"),
 		DBname: viper.GetString("db_name"),

cmd/headscale/headscale_test.go

@@ -27,7 +27,7 @@ func (s *Suite) TearDownSuite(c *check.C) {
 
 }
 
-func (*Suite) TestConfigLoading(c *check.C) {
+func (*Suite) TestPostgresConfigLoading(c *check.C) {
 	tmpDir, err := ioutil.TempDir("", "headscale")
 	if err != nil {
 		c.Fatal(err)
@@ -40,7 +40,7 @@ func (*Suite) TestConfigLoading(c *check.C) {
 	}
 
 	// Symlink the example config file
-	err = os.Symlink(filepath.Clean(path+"/../../config.json.example"), filepath.Join(tmpDir, "config.json"))
+	err = os.Symlink(filepath.Clean(path+"/../../config.json.postgres.example"), filepath.Join(tmpDir, "config.json"))
 	if err != nil {
 		c.Fatal(err)
 	}
@@ -50,14 +50,47 @@ func (*Suite) TestConfigLoading(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	// Test that config file was interpreted correctly
-	c.Assert(viper.GetString("server_url"), check.Equals, "http://192.168.1.12:8000")
+	c.Assert(viper.GetString("server_url"), check.Equals, "http://127.0.0.1:8000")
 	c.Assert(viper.GetString("listen_addr"), check.Equals, "0.0.0.0:8000")
 	c.Assert(viper.GetString("derp_map_path"), check.Equals, "derp.yaml")
+	c.Assert(viper.GetString("db_type"), check.Equals, "postgres")
 	c.Assert(viper.GetString("db_port"), check.Equals, "5432")
 	c.Assert(viper.GetString("tls_letsencrypt_hostname"), check.Equals, "")
 	c.Assert(viper.GetString("tls_letsencrypt_challenge_type"), check.Equals, "HTTP-01")
 }
 
+func (*Suite) TestSqliteConfigLoading(c *check.C) {
+	tmpDir, err := ioutil.TempDir("", "headscale")
+	if err != nil {
+		c.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	path, err := os.Getwd()
+	if err != nil {
+		c.Fatal(err)
+	}
+
+	// Symlink the example config file
+	err = os.Symlink(filepath.Clean(path+"/../../config.json.sqlite.example"), filepath.Join(tmpDir, "config.json"))
+	if err != nil {
+		c.Fatal(err)
+	}
+
+	// Load example config, it should load without validation errors
+	err = loadConfig(tmpDir)
+	c.Assert(err, check.IsNil)
+
+	// Test that config file was interpreted correctly
+	c.Assert(viper.GetString("server_url"), check.Equals, "http://127.0.0.1:8000")
+	c.Assert(viper.GetString("listen_addr"), check.Equals, "0.0.0.0:8000")
+	c.Assert(viper.GetString("derp_map_path"), check.Equals, "derp.yaml")
+	c.Assert(viper.GetString("db_type"), check.Equals, "sqlite3")
+	c.Assert(viper.GetString("db_path"), check.Equals, "db.sqlite")
+	c.Assert(viper.GetString("tls_letsencrypt_hostname"), check.Equals, "")
+	c.Assert(viper.GetString("tls_letsencrypt_challenge_type"), check.Equals, "HTTP-01")
+}
+
 func writeConfig(c *check.C, tmpDir string, configYaml []byte) {
 	// Populate a custom config file
 	configFile := filepath.Join(tmpDir, "config.yaml")
@@ -89,7 +122,7 @@ func (*Suite) TestTLSConfigValidation(c *check.C) {
 	fmt.Println(tmp)
 
 	// Check configuration validation errors (2)
-	configYaml = []byte("---\nserver_url: \"http://192.168.1.12:8000\"\ntls_letsencrypt_hostname: \"example.com\"\ntls_letsencrypt_challenge_type: \"TLS-ALPN-01\"")
+	configYaml = []byte("---\nserver_url: \"http://127.0.0.1:8000\"\ntls_letsencrypt_hostname: \"example.com\"\ntls_letsencrypt_challenge_type: \"TLS-ALPN-01\"")
 	writeConfig(c, tmpDir, configYaml)
 	err = loadConfig(tmpDir)
 	c.Assert(err, check.NotNil)

config.json.example → config.json.postgres.example

@@ -1,8 +1,9 @@
 {
-    "server_url": "http://192.168.1.12:8000",
+    "server_url": "http://127.0.0.1:8000",
     "listen_addr": "0.0.0.0:8000",
     "private_key_path": "private.key",
     "derp_map_path": "derp.yaml",
+    "db_type": "postgres",
     "db_host": "localhost",
     "db_port": 5432,
     "db_name": "headscale",

config.json.sqlite.example

@@ -0,0 +1,13 @@
+{
+    "server_url": "http://127.0.0.1:8000",
+    "listen_addr": "0.0.0.0:8000",
+    "private_key_path": "private.key",
+    "derp_map_path": "derp.yaml",
+    "db_type": "sqlite3",
+    "db_path": "db.sqlite",
+    "tls_letsencrypt_hostname": "",
+    "tls_letsencrypt_cache_dir": ".cache",
+    "tls_letsencrypt_challenge_type": "HTTP-01",
+    "tls_cert_path": "",
+    "tls_key_path": ""
+}

db.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/jinzhu/gorm"
 	_ "github.com/jinzhu/gorm/dialects/postgres" // sql driver
+	_ "github.com/jinzhu/gorm/dialects/sqlite"   // sql driver
 )
 
 const dbVersion = "1"