cli.LoadConfig accepts config file now

cmd/headscale/cli/utils.go

@@ -33,7 +33,10 @@ const (
 	HeadscaleDateTimeFormat = "2006-01-02 15:04:05"
 )
 
-func LoadConfig(path string) error {
+func LoadConfig(path string, isFile bool) error {
+	if isFile {
+		viper.SetConfigFile(path)
+	} else {
 		viper.SetConfigName("config")
 		if path == "" {
 			viper.AddConfigPath("/etc/headscale/")
@@ -43,6 +46,7 @@ func LoadConfig(path string) error {
 			// For testing
 			viper.AddConfigPath(path)
 		}
+	}
 
 	viper.SetEnvPrefix("headscale")
 	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))

cmd/headscale/headscale.go

@@ -43,7 +43,7 @@ func main() {
 		NoColor:    !colors,
 	})
 
-	if err := cli.LoadConfig(""); err != nil {
+	if err := cli.LoadConfig("", false); err != nil {
 		log.Fatal().Caller().Err(err)
 	}
 

cmd/headscale/headscale_test.go

@@ -27,6 +27,51 @@ func (s *Suite) SetUpSuite(c *check.C) {
 func (s *Suite) TearDownSuite(c *check.C) {
 }
 
+func (*Suite) TestConfigFileLoading(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)
+	}
+
+	cfgFile := filepath.Join(tmpDir, "config.yaml")
+
+	// Symlink the example config file
+	err = os.Symlink(
+		filepath.Clean(path+"/../../config-example.yaml"),
+		cfgFile,
+	)
+	if err != nil {
+		c.Fatal(err)
+	}
+
+	// Load example config, it should load without validation errors
+	err = cli.LoadConfig(cfgFile, true)
+	c.Assert(err, check.IsNil)
+
+	// Test that config file was interpreted correctly
+	c.Assert(viper.GetString("server_url"), check.Equals, "http://127.0.0.1:8080")
+	c.Assert(viper.GetString("listen_addr"), check.Equals, "0.0.0.0:8080")
+	c.Assert(viper.GetString("metrics_listen_addr"), check.Equals, "127.0.0.1:9090")
+	c.Assert(viper.GetString("db_type"), check.Equals, "sqlite3")
+	c.Assert(viper.GetString("db_path"), check.Equals, "/var/lib/headscale/db.sqlite")
+	c.Assert(viper.GetString("tls_letsencrypt_hostname"), check.Equals, "")
+	c.Assert(viper.GetString("tls_letsencrypt_listen"), check.Equals, ":http")
+	c.Assert(viper.GetString("tls_letsencrypt_challenge_type"), check.Equals, "HTTP-01")
+	c.Assert(viper.GetStringSlice("dns_config.nameservers")[0], check.Equals, "1.1.1.1")
+	c.Assert(
+		cli.GetFileMode("unix_socket_permission"),
+		check.Equals,
+		fs.FileMode(0o770),
+	)
+	c.Assert(viper.GetBool("logtail.enabled"), check.Equals, false)
+}
+
 func (*Suite) TestConfigLoading(c *check.C) {
 	tmpDir, err := ioutil.TempDir("", "headscale")
 	if err != nil {
@@ -49,7 +94,7 @@ func (*Suite) TestConfigLoading(c *check.C) {
 	}
 
 	// Load example config, it should load without validation errors
-	err = cli.LoadConfig(tmpDir)
+	err = cli.LoadConfig(tmpDir, false)
 	c.Assert(err, check.IsNil)
 
 	// Test that config file was interpreted correctly
@@ -92,7 +137,7 @@ func (*Suite) TestDNSConfigLoading(c *check.C) {
 	}
 
 	// Load example config, it should load without validation errors
-	err = cli.LoadConfig(tmpDir)
+	err = cli.LoadConfig(tmpDir, false)
 	c.Assert(err, check.IsNil)
 
 	dnsConfig, baseDomain := cli.GetDNSConfig()
@@ -125,7 +170,7 @@ func (*Suite) TestTLSConfigValidation(c *check.C) {
 	writeConfig(c, tmpDir, configYaml)
 
 	// Check configuration validation errors (1)
-	err = cli.LoadConfig(tmpDir)
+	err = cli.LoadConfig(tmpDir, false)
 	c.Assert(err, check.NotNil)
 	// check.Matches can not handle multiline strings
 	tmp := strings.ReplaceAll(err.Error(), "\n", "***")
@@ -150,6 +195,6 @@ func (*Suite) TestTLSConfigValidation(c *check.C) {
 		"---\nserver_url: \"http://127.0.0.1:8080\"\ntls_letsencrypt_hostname: \"example.com\"\ntls_letsencrypt_challenge_type: \"TLS-ALPN-01\"",
 	)
 	writeConfig(c, tmpDir, configYaml)
-	err = cli.LoadConfig(tmpDir)
+	err = cli.LoadConfig(tmpDir, false)
 	c.Assert(err, check.IsNil)
 }