fix(outputs.graphite): Add custom regex to outputs (#12908)

plugins/outputs/graphite/graphite.go

@@ -25,6 +25,7 @@ type Graphite struct {
 	GraphiteTagSupport      bool   `toml:"graphite_tag_support"`
 	GraphiteTagSanitizeMode string `toml:"graphite_tag_sanitize_mode"`
 	GraphiteSeparator       string `toml:"graphite_separator"`
+	GraphiteStrictRegex     string `toml:"graphite_strict_sanitize_regex"`
 	// URL is only for backwards compatibility
 	Servers   []string        `toml:"servers"`
 	Prefix    string          `toml:"prefix"`
@@ -165,7 +166,15 @@ func (g *Graphite) checkEOF(conn net.Conn) error {
 func (g *Graphite) Write(metrics []telegraf.Metric) error {
 	// Prepare data
 	var batch []byte
-	s, err := serializers.NewGraphiteSerializer(g.Prefix, g.Template, "", g.GraphiteTagSupport, g.GraphiteTagSanitizeMode, g.GraphiteSeparator, g.Templates)
+	s, err := serializers.NewGraphiteSerializer(
+		g.Prefix,
+		g.Template,
+		g.GraphiteStrictRegex,
+		g.GraphiteTagSupport,
+		g.GraphiteTagSanitizeMode,
+		g.GraphiteSeparator,
+		g.Templates,
+	)
 	if err != nil {
 		return err
 	}

plugins/outputs/graphite/graphite_test.go

@@ -102,6 +102,45 @@ func TestGraphiteOK(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func TestGraphiteStrictRegex(t *testing.T) {
+	var wg sync.WaitGroup
+	wg.Add(1)
+	t.Log("Starting server")
+	tcpServer, err := net.Listen("tcp", "127.0.0.1:12042")
+	require.NoError(t, err)
+	go func() {
+		defer wg.Done()
+		conn, _ := (tcpServer).Accept()
+		reader := bufio.NewReader(conn)
+		tp := textproto.NewReader(reader)
+		data1, _ := tp.ReadLine()
+		require.Equal(t, "192_168_0_1.|us-west-2|.mymeasurement.myfield 0.123 1289430000", data1)
+		require.NoError(t, conn.Close())
+		require.NoError(t, tcpServer.Close())
+	}()
+
+	m := metric.New(
+		"mymeasurement",
+		map[string]string{
+			"host":       "192.168.0.1",
+			"datacenter": "|us-west-2|",
+		},
+		map[string]interface{}{"myfield": float64(0.123)},
+		time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
+	)
+
+	g := Graphite{
+		Servers:             []string{"localhost:12042"},
+		Log:                 testutil.Logger{},
+		GraphiteStrictRegex: `[^a-zA-Z0-9-:._=|\p{L}]`,
+	}
+	require.NoError(t, g.Connect())
+	require.NoError(t, g.Write([]telegraf.Metric{m}))
+
+	wg.Wait()
+	require.NoError(t, g.Close())
+}
+
 func TestGraphiteOkWithSeparatorDot(t *testing.T) {
 	var wg sync.WaitGroup
 	// Start TCP server