mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2025-04-27 22:51:42 +02:00
add only_metrics, exclude_metrics, interface_alias. docs: consistency
This commit is contained in:
brinkcoder
parent
478c5159f5
commit
0e7b4fc936
@ -5,20 +5,24 @@ import (
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"encoding/json"
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"errors"
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"os"
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"regexp"
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"strconv"
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"strings"
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"time"
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lp "github.com/ClusterCockpit/cc-lib/ccMessage"
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cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
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lp "github.com/ClusterCockpit/cc-energy-manager/pkg/cc-message"
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)
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const NETSTATFILE = "/proc/net/dev"
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type NetstatCollectorConfig struct {
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IncludeDevices []string `json:"include_devices"`
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SendAbsoluteValues bool `json:"send_abs_values"`
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SendDerivedValues bool `json:"send_derived_values"`
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IncludeDevices []string `json:"include_devices"`
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SendAbsoluteValues bool `json:"send_abs_values"`
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SendDerivedValues bool `json:"send_derived_values"`
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InterfaceAliases map[string][]string `json:"interface_aliases,omitempty"`
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ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
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OnlyMetrics []string `json:"only_metrics,omitempty"`
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}
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type NetstatCollectorMetric struct {
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@ -32,9 +36,43 @@ type NetstatCollectorMetric struct {
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type NetstatCollector struct {
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metricCollector
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config NetstatCollectorConfig
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matches map[string][]NetstatCollectorMetric
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lastTimestamp time.Time
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config NetstatCollectorConfig
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aliasToCanonical map[string]string
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matches map[string][]NetstatCollectorMetric
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lastTimestamp time.Time
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}
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func (m *NetstatCollector) buildAliasMapping() {
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m.aliasToCanonical = make(map[string]string)
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for canon, aliases := range m.config.InterfaceAliases {
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for _, alias := range aliases {
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m.aliasToCanonical[alias] = canon
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}
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}
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}
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func getCanonicalName(raw string, aliasToCanonical map[string]string) string {
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if canon, ok := aliasToCanonical[raw]; ok {
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return canon
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}
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return raw
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}
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func (m *NetstatCollector) shouldOutput(metricName string) bool {
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if len(m.config.OnlyMetrics) > 0 {
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for _, n := range m.config.OnlyMetrics {
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if n == metricName {
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return true
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}
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}
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return false
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}
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for _, n := range m.config.ExcludeMetrics {
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if n == metricName {
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return false
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}
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}
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return true
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}
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func (m *NetstatCollector) Init(config json.RawMessage) error {
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@ -43,41 +81,20 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
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m.setup()
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m.lastTimestamp = time.Now()
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const (
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fieldInterface = iota
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fieldReceiveBytes
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fieldReceivePackets
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fieldReceiveErrs
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fieldReceiveDrop
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fieldReceiveFifo
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fieldReceiveFrame
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fieldReceiveCompressed
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fieldReceiveMulticast
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fieldTransmitBytes
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fieldTransmitPackets
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fieldTransmitErrs
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fieldTransmitDrop
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fieldTransmitFifo
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fieldTransmitColls
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fieldTransmitCarrier
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fieldTransmitCompressed
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)
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m.matches = make(map[string][]NetstatCollectorMetric)
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// Set default configuration,
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// Set default configuration
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m.config.SendAbsoluteValues = true
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m.config.SendDerivedValues = false
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// Read configuration file, allow overwriting default config
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if len(config) > 0 {
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err := json.Unmarshal(config, &m.config)
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if err != nil {
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if err := json.Unmarshal(config, &m.config); err != nil {
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cclog.ComponentError(m.name, "Error reading config:", err.Error())
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return err
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}
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}
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// Check access to net statistic file
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m.buildAliasMapping()
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// Open /proc/net/dev and read interfaces.
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file, err := os.Open(NETSTATFILE)
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if err != nil {
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cclog.ComponentError(m.name, err.Error())
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@ -85,30 +102,38 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
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}
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defer file.Close()
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m.matches = make(map[string][]NetstatCollectorMetric)
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scanner := bufio.NewScanner(file)
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// Regex to split interface name and rest of line.
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reInterface := regexp.MustCompile(`^([^:]+):\s*(.*)$`)
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// Field positions based on /proc/net/dev format.
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const (
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fieldReceiveBytes = iota + 1
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fieldReceivePackets
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fieldTransmitBytes = 9
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fieldTransmitPackets
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)
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for scanner.Scan() {
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l := scanner.Text()
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// Skip lines with no net device entry
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if !strings.Contains(l, ":") {
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line := scanner.Text()
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// Skip header lines.
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if !strings.Contains(line, ":") {
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continue
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}
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// Split line into fields
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f := strings.Fields(l)
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// Get net device entry
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dev := strings.Trim(f[0], ": ")
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// Check if device is a included device
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if _, ok := stringArrayContains(m.config.IncludeDevices, dev); ok {
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tags := map[string]string{"stype": "network", "stype-id": dev, "type": "node"}
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matches := reInterface.FindStringSubmatch(line)
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if len(matches) != 3 {
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continue
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}
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raw := strings.TrimSpace(matches[1])
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canonical := getCanonicalName(raw, m.aliasToCanonical)
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// Check if device is included.
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if _, ok := stringArrayContains(m.config.IncludeDevices, canonical); ok {
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tags := map[string]string{"stype": "network", "stype-id": raw, "type": "node"}
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meta_unit_byte := map[string]string{"source": m.name, "group": "Network", "unit": "bytes"}
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meta_unit_byte_per_sec := map[string]string{"source": m.name, "group": "Network", "unit": "bytes/sec"}
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meta_unit_pkts := map[string]string{"source": m.name, "group": "Network", "unit": "packets"}
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meta_unit_pkts_per_sec := map[string]string{"source": m.name, "group": "Network", "unit": "packets/sec"}
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m.matches[dev] = []NetstatCollectorMetric{
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m.matches[canonical] = []NetstatCollectorMetric{
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{
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name: "net_bytes_in",
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index: fieldReceiveBytes,
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@ -143,11 +168,10 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
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},
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}
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}
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}
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if len(m.matches) == 0 {
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return errors.New("no devices to collector metrics found")
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return errors.New("no devices to collect metrics found")
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}
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m.init = true
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return nil
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@ -157,14 +181,11 @@ func (m *NetstatCollector) Read(interval time.Duration, output chan lp.CCMessage
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if !m.init {
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return
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}
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// Current time stamp
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now := time.Now()
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// time difference to last time stamp
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timeDiff := now.Sub(m.lastTimestamp).Seconds()
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// Save current timestamp
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m.lastTimestamp = now
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file, err := os.Open(string(NETSTATFILE))
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file, err := os.Open(NETSTATFILE)
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if err != nil {
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cclog.ComponentError(m.name, err.Error())
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return
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@ -173,43 +194,39 @@ func (m *NetstatCollector) Read(interval time.Duration, output chan lp.CCMessage
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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l := scanner.Text()
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// Skip lines with no net device entry
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if !strings.Contains(l, ":") {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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// Split line into fields
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f := strings.Fields(l)
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// Get net device entry
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dev := strings.Trim(f[0], ":")
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// Check if device is a included device
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if devmetrics, ok := m.matches[dev]; ok {
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reInterface := regexp.MustCompile(`^([^:]+):\s*(.*)$`)
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matches := reInterface.FindStringSubmatch(line)
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if len(matches) != 3 {
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continue
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}
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raw := strings.TrimSpace(matches[1])
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canonical := getCanonicalName(raw, m.aliasToCanonical)
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if devmetrics, ok := m.matches[canonical]; ok {
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fields := strings.Fields(matches[2])
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for i := range devmetrics {
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metric := &devmetrics[i]
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// Read value
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v, err := strconv.ParseInt(f[metric.index], 10, 64)
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v, err := strconv.ParseInt(fields[metric.index-1], 10, 64)
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if err != nil {
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continue
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}
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if m.config.SendAbsoluteValues {
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// Send absolute metric if enabled.
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if m.config.SendAbsoluteValues && m.shouldOutput(metric.name) {
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if y, err := lp.NewMessage(metric.name, metric.tags, metric.meta, map[string]interface{}{"value": v}, now); err == nil {
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output <- y
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}
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}
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if m.config.SendDerivedValues {
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if metric.lastValue >= 0 {
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rate := float64(v-metric.lastValue) / timeDiff
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if y, err := lp.NewMessage(metric.name+"_bw", metric.tags, metric.meta_rates, map[string]interface{}{"value": rate}, now); err == nil {
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output <- y
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}
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// Send derived metric if enabled.
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if m.config.SendDerivedValues && metric.lastValue >= 0 && m.shouldOutput(metric.name+"_bw") {
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rate := float64(v-metric.lastValue) / timeDiff
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if y, err := lp.NewMessage(metric.name+"_bw", metric.tags, metric.meta_rates, map[string]interface{}{"value": rate}, now); err == nil {
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output <- y
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}
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metric.lastValue = v
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}
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metric.lastValue = v
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}
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}
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}
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@ -1,27 +1,42 @@
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## `netstat` collector
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```json
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"netstat": {
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"include_devices": [
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"eth0"
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"eth0",
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"eno1"
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],
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"send_abs_values" : true,
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"send_derived_values" : true
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"send_abs_values": true,
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"send_derived_values": true,
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"interface_aliases": {
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"eno1": ["eno1np0", "eno1_alt"],
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"eth0": ["eth0_alias"]
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},
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"exclude_metrics": [
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"net_pkts_in"
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],
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"only_metrics": [
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"net_bytes_in_bw"
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]
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}
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```
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The `netstat` collector reads data from `/proc/net/dev` and outputs a handful **node** metrics. With the `include_devices` list you can specify which network devices should be measured. **Note**: Most other collectors use an _exclude_ list instead of an include list.
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The `netstat` collector reads data from `/proc/net/dev` and outputs a handful **node** metrics. With the `include_devices` list you can specify which network interfaces should be measured. Optionally, you can define an `interface_aliases` mapping. For each canonical device (as listed in include_devices), you may provide an array of aliases that may be reported by the system. When an alias is detected, it is mapped to the canonical name, while the output tag `stype-id` always shows the actual system-reported name.
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Metrics:
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* `net_bytes_in` (`unit=bytes`)
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* `net_bytes_out` (`unit=bytes`)
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* `net_pkts_in` (`unit=packets`)
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* `net_pkts_out` (`unit=packets`)
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* `net_bytes_in_bw` (`unit=bytes/sec` if `send_derived_values == true`)
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* `net_bytes_out_bw` (`unit=bytes/sec` if `send_derived_values == true`)
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* `net_pkts_in_bw` (`unit=packets/sec` if `send_derived_values == true`)
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* `net_pkts_out_bw` (`unit=packets/sec` if `send_derived_values == true`)
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Both filtering mechanisms are supported:
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- `exclude_metrics`: Excludes the specified metrics.
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- `only_metrics`: If provided, only the listed metrics are collected. This takes precedence over `exclude_metrics`.
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**Absolute Metrics:**
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- `net_bytes_in` (unit: `bytes`)
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- `net_bytes_out` (unit: `bytes`)
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- `net_pkts_in` (unit: `packets`)
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- `net_pkts_out` (unit: `packets`)
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**Derived Metrics:**
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- `net_bytes_in_bw` (unit: `bytes/sec`)
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- `net_bytes_out_bw` (unit: `bytes/sec`)
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- `net_pkts_in_bw` (unit: `packets/sec`)
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- `net_pkts_out_bw` (unit: `packets/sec`)
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The device name is added as tag `stype=network,stype-id=<device>`.
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