Use include/exclude flags for ethtool filtering (#2165)

Use the same flag pattern as netdev to make filtering methods the same.
* Move SanitizeMetricName to helper.go

Signed-off-by: Ben Kochie <superq@gmail.com>

collector/ethtool_linux.go

@@ -39,11 +39,11 @@ import (
 )
 
 var (
-	ethtoolIgnoredDevices  = kingpin.Flag("collector.ethtool.ignored-devices", "Regexp of net devices to ignore for ethtool collector.").Default("^$").String()
+	ethtoolDeviceInclude   = kingpin.Flag("collector.ethtool.device-include", "Regexp of ethtool devices to include (mutually exclusive to device-exclude).").String()
+	ethtoolDeviceExclude   = kingpin.Flag("collector.ethtool.device-exclude", "Regexp of ethtool devices to exclude (mutually exclusive to device-include).").String()
 	ethtoolIncludedMetrics = kingpin.Flag("collector.ethtool.metrics-include", "Regexp of ethtool stats to include.").Default(".*").String()
-	metricNameRegex        = regexp.MustCompile(`_*[^0-9A-Za-z_]+_*`)
-	receivedRegex          = regexp.MustCompile(`(^|_)rx(_|$)`)
-	transmittedRegex       = regexp.MustCompile(`(^|_)tx(_|$)`)
+	ethtoolReceivedRegex   = regexp.MustCompile(`(^|_)rx(_|$)`)
+	ethtoolTransmitRegex   = regexp.MustCompile(`(^|_)tx(_|$)`)
 )
 
 type Ethtool interface {
@@ -64,13 +64,13 @@ func (e *ethtoolLibrary) Stats(intf string) (map[string]uint64, error) {
 }
 
 type ethtoolCollector struct {
-	fs                    sysfs.FS
-	entries               map[string]*prometheus.Desc
-	ethtool               Ethtool
-	ignoredDevicesPattern *regexp.Regexp
-	infoDesc              *prometheus.Desc
-	metricsPattern        *regexp.Regexp
-	logger                log.Logger
+	fs             sysfs.FS
+	entries        map[string]*prometheus.Desc
+	ethtool        Ethtool
+	deviceFilter   netDevFilter
+	infoDesc       *prometheus.Desc
+	metricsPattern *regexp.Regexp
+	logger         log.Logger
 }
 
 // makeEthtoolCollector is the internal constructor for EthtoolCollector.
@@ -89,11 +89,11 @@ func makeEthtoolCollector(logger log.Logger) (*ethtoolCollector, error) {
 
 	// Pre-populate some common ethtool metrics.
 	return &ethtoolCollector{
-		fs:                    fs,
-		ethtool:               &ethtoolLibrary{e},
-		ignoredDevicesPattern: regexp.MustCompile(*ethtoolIgnoredDevices),
-		metricsPattern:        regexp.MustCompile(*ethtoolIncludedMetrics),
-		logger:                logger,
+		fs:             fs,
+		ethtool:        &ethtoolLibrary{e},
+		deviceFilter:   newNetDevFilter(*ethtoolDeviceExclude, *ethtoolDeviceInclude),
+		metricsPattern: regexp.MustCompile(*ethtoolIncludedMetrics),
+		logger:         logger,
 		entries: map[string]*prometheus.Desc{
 			"rx_bytes": prometheus.NewDesc(
 				prometheus.BuildFQName(namespace, "ethtool", "received_bytes_total"),
@@ -143,26 +143,11 @@ func init() {
 	registerCollector("ethtool", defaultDisabled, NewEthtoolCollector)
 }
 
-// Sanitize the given metric name by replacing invalid characters by underscores.
-//
-// OpenMetrics and the Prometheus exposition format require the metric name
-// to consist only of alphanumericals and "_", ":" and they must not start
-// with digits. Since colons in MetricFamily are reserved to signal that the
-// MetricFamily is the result of a calculation or aggregation of a general
-// purpose monitoring system, colons will be replaced as well.
-//
-// Note: If not subsequently prepending a namespace and/or subsystem (e.g.,
-// with prometheus.BuildFQName), the caller must ensure that the supplied
-// metricName does not begin with a digit.
-func SanitizeMetricName(metricName string) string {
-	return metricNameRegex.ReplaceAllString(metricName, "_")
-}
-
 // Generate the fully-qualified metric name for the ethool metric.
 func buildEthtoolFQName(metric string) string {
 	metricName := strings.TrimLeft(strings.ToLower(SanitizeMetricName(metric)), "_")
-	metricName = receivedRegex.ReplaceAllString(metricName, "${1}received${2}")
-	metricName = transmittedRegex.ReplaceAllString(metricName, "${1}transmitted${2}")
+	metricName = ethtoolReceivedRegex.ReplaceAllString(metricName, "${1}received${2}")
+	metricName = ethtoolTransmitRegex.ReplaceAllString(metricName, "${1}transmitted${2}")
 	return prometheus.BuildFQName(namespace, "ethtool", metricName)
 }
 
@@ -189,7 +174,7 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 		var stats map[string]uint64
 		var err error
 
-		if c.ignoredDevicesPattern.MatchString(device) {
+		if c.deviceFilter.ignored(device) {
 			continue
 		}
 

collector/ethtool_linux_test.go

@@ -121,24 +121,6 @@ func NewEthtoolTestCollector(logger log.Logger) (Collector, error) {
 	return collector, nil
 }
 
-func TestSanitizeMetricName(t *testing.T) {
-	testcases := map[string]string{
-		"":                             "",
-		"rx_errors":                    "rx_errors",
-		"Queue[0] AllocFails":          "Queue_0_AllocFails",
-		"Tx LPI entry count":           "Tx_LPI_entry_count",
-		"port.VF_admin_queue_requests": "port_VF_admin_queue_requests",
-		"[3]: tx_bytes":                "_3_tx_bytes",
-	}
-
-	for metricName, expected := range testcases {
-		got := SanitizeMetricName(metricName)
-		if expected != got {
-			t.Errorf("Expected '%s' but got '%s'", expected, got)
-		}
-	}
-}
-
 func TestBuildEthtoolFQName(t *testing.T) {
 	testcases := map[string]string{
 		"rx_errors":                    "node_ethtool_received_errors",
@@ -174,7 +156,6 @@ func TestEthtoolCollector(t *testing.T) {
 		prometheus.NewDesc("node_ethtool_transmitted_packets_total", "Network interface packets sent", []string{"device"}, nil).String(),
 	}
 
-	*ethtoolIgnoredDevices = "^$"
 	*sysPath = "fixtures/sys"
 
 	collector, err := NewEthtoolTestCollector(log.NewNopLogger())

collector/helper.go

@@ -16,6 +16,7 @@ package collector
 import (
 	"bytes"
 	"io/ioutil"
+	"regexp"
 	"strconv"
 	"strings"
 )
@@ -44,3 +45,20 @@ func bytesToString(byteArray []byte) string {
 	}
 	return string(byteArray[:n])
 }
+
+var metricNameRegex = regexp.MustCompile(`_*[^0-9A-Za-z_]+_*`)
+
+// Sanitize the given metric name by replacing invalid characters by underscores.
+//
+// OpenMetrics and the Prometheus exposition format require the metric name
+// to consist only of alphanumericals and "_", ":" and they must not start
+// with digits. Since colons in MetricFamily are reserved to signal that the
+// MetricFamily is the result of a calculation or aggregation of a general
+// purpose monitoring system, colons will be replaced as well.
+//
+// Note: If not subsequently prepending a namespace and/or subsystem (e.g.,
+// with prometheus.BuildFQName), the caller must ensure that the supplied
+// metricName does not begin with a digit.
+func SanitizeMetricName(metricName string) string {
+	return metricNameRegex.ReplaceAllString(metricName, "_")
+}

collector/helper_test.go

@@ -61,3 +61,21 @@ func TestBytesToString(t *testing.T) {
 		}
 	}
 }
+
+func TestSanitizeMetricName(t *testing.T) {
+	testcases := map[string]string{
+		"":                             "",
+		"rx_errors":                    "rx_errors",
+		"Queue[0] AllocFails":          "Queue_0_AllocFails",
+		"Tx LPI entry count":           "Tx_LPI_entry_count",
+		"port.VF_admin_queue_requests": "port_VF_admin_queue_requests",
+		"[3]: tx_bytes":                "_3_tx_bytes",
+	}
+
+	for metricName, expected := range testcases {
+		got := SanitizeMetricName(metricName)
+		if expected != got {
+			t.Errorf("Expected '%s' but got '%s'", expected, got)
+		}
+	}
+}