mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2025-04-27 22:51:42 +02:00
add only_metrics, diff_values and derived_values. docs: clarify filter logic, consistency for list
This commit is contained in:
brinkcoder
parent
170a358d79
commit
1bd9d389ad
@ -9,31 +9,36 @@ import (
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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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// These are the fields we read from the JSON configuration
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// NfsIOStatCollectorConfig holds configuration options for the nfsiostat collector.
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type NfsIOStatCollectorConfig struct {
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ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
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OnlyMetrics []string `json:"only_metrics,omitempty"`
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ExcludeFilesystem []string `json:"exclude_filesystem,omitempty"`
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UseServerAddressAsSType bool `json:"use_server_as_stype,omitempty"`
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SendAbsoluteValues bool `json:"send_abs_values"`
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SendDerivedValues bool `json:"send_derived_values"`
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}
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// This contains all variables we need during execution and the variables
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// defined by metricCollector (name, init, ...)
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// NfsIOStatCollector reads NFS I/O statistics from /proc/self/mountstats.
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type NfsIOStatCollector struct {
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metricCollector
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config NfsIOStatCollectorConfig // the configuration structure
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meta map[string]string // default meta information
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tags map[string]string // default tags
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data map[string]map[string]int64 // data storage for difference calculation
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key string // which device info should be used as subtype ID? 'server' or 'mntpoint', see NfsIOStatCollectorConfig.UseServerAddressAsSType
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config NfsIOStatCollectorConfig
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meta map[string]string
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tags map[string]string
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data map[string]map[string]int64 // previous values per filesystem
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key string // "server" or "mntpoint"
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lastTimestamp time.Time
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}
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// Regular expressions to parse mount info and byte statistics.
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var deviceRegex = regexp.MustCompile(`device (?P<server>[^ ]+) mounted on (?P<mntpoint>[^ ]+) with fstype nfs(?P<version>\d*) statvers=[\d\.]+`)
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var bytesRegex = regexp.MustCompile(`\s+bytes:\s+(?P<nread>[^ ]+) (?P<nwrite>[^ ]+) (?P<dread>[^ ]+) (?P<dwrite>[^ ]+) (?P<nfsread>[^ ]+) (?P<nfswrite>[^ ]+) (?P<pageread>[^ ]+) (?P<pagewrite>[^ ]+)`)
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// resolve_regex_fields extracts named regex groups from a string.
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func resolve_regex_fields(s string, regex *regexp.Regexp) map[string]string {
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fields := make(map[string]string)
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groups := regex.SubexpNames()
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@ -47,6 +52,52 @@ func resolve_regex_fields(s string, regex *regexp.Regexp) map[string]string {
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return fields
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}
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// shouldOutput returns true if a base metric (without prefix) is allowed.
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func (m *NfsIOStatCollector) 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 *NfsIOStatCollector) Init(config json.RawMessage) error {
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var err error
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m.name = "NfsIOStatCollector"
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m.setup()
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m.parallel = true
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m.meta = map[string]string{"source": m.name, "group": "NFS", "unit": "bytes"}
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m.tags = map[string]string{"type": "node"}
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// Default: use_server_as_stype is false.
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m.config.UseServerAddressAsSType = false
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// Defaults for absolute and derived values.
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m.config.SendAbsoluteValues = false
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m.config.SendDerivedValues = true
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if len(config) > 0 {
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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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m.key = "mntpoint"
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if m.config.UseServerAddressAsSType {
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m.key = "server"
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}
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m.data = m.readNfsiostats()
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m.lastTimestamp = time.Now()
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m.init = true
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return nil
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}
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func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
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data := make(map[string]map[string]int64)
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filename := "/proc/self/mountstats"
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@ -58,7 +109,7 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
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lines := strings.Split(string(stats), "\n")
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var current map[string]string = nil
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for _, l := range lines {
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// Is this a device line with mount point, remote target and NFS version?
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// Check for a device line.
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dev := resolve_regex_fields(l, deviceRegex)
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if len(dev) > 0 {
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if _, ok := stringArrayContains(m.config.ExcludeFilesystem, dev[m.key]); !ok {
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@ -66,22 +117,35 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
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if len(current["version"]) == 0 {
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current["version"] = "3"
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}
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} else {
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current = nil
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}
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}
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if len(current) > 0 {
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// Byte line parsing (if found the device for it)
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if current != nil {
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// Parse byte statistics line.
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bytes := resolve_regex_fields(l, bytesRegex)
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if len(bytes) > 0 {
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data[current[m.key]] = make(map[string]int64)
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for name, sval := range bytes {
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if _, ok := stringArrayContains(m.config.ExcludeMetrics, name); !ok {
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val, err := strconv.ParseInt(sval, 10, 64)
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if err == nil {
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data[current[m.key]][name] = val
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if _, ok := stringArrayContains(m.config.ExcludeMetrics, name); ok {
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continue
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}
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if len(m.config.OnlyMetrics) > 0 {
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found := false
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for _, metric := range m.config.OnlyMetrics {
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if metric == name {
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found = true
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break
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}
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}
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if !found {
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continue
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}
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}
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val, err := strconv.ParseInt(sval, 10, 64)
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if err == nil {
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data[current[m.key]][name] = val
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}
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}
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current = nil
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}
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@ -90,65 +154,56 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
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return data
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}
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func (m *NfsIOStatCollector) Init(config json.RawMessage) error {
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var err error = nil
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m.name = "NfsIOStatCollector"
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m.setup()
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m.parallel = true
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m.meta = map[string]string{"source": m.name, "group": "NFS", "unit": "bytes"}
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m.tags = map[string]string{"type": "node"}
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m.config.UseServerAddressAsSType = false
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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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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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m.key = "mntpoint"
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if m.config.UseServerAddressAsSType {
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m.key = "server"
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}
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m.data = m.readNfsiostats()
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m.init = true
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return err
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}
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func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMessage) {
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timestamp := time.Now()
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now := time.Now()
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timeDiff := now.Sub(m.lastTimestamp).Seconds()
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m.lastTimestamp = now
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// Get the current values for all mountpoints
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newdata := m.readNfsiostats()
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for mntpoint, values := range newdata {
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// Was the mount point already present in the last iteration
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if old, ok := m.data[mntpoint]; ok {
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// Calculate the difference of old and new values
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for i := range values {
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x := values[i] - old[i]
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y, err := lp.NewMessage(fmt.Sprintf("nfsio_%s", i), m.tags, m.meta, map[string]interface{}{"value": x}, timestamp)
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if _, ok := stringArrayContains(m.config.ExcludeFilesystem, mntpoint); ok {
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continue
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}
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for name, newVal := range values {
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baseName := name // Base metric name.
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if m.config.SendAbsoluteValues && m.shouldOutput(baseName) {
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msg, err := lp.NewMessage(fmt.Sprintf("nfsio_%s", baseName), m.tags, m.meta, map[string]interface{}{"value": newVal}, now)
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if err == nil {
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if strings.HasPrefix(i, "page") {
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y.AddMeta("unit", "4K_Pages")
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}
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y.AddTag("stype", "filesystem")
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y.AddTag("stype-id", mntpoint)
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// Send it to output channel
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output <- y
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msg.AddTag("stype", "filesystem")
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msg.AddTag("stype-id", mntpoint)
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output <- msg
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}
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// Update old to the new value for the next iteration
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old[i] = values[i]
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}
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} else {
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// First time we see this mount point, store all values
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m.data[mntpoint] = values
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if m.config.SendDerivedValues {
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if old, ok := m.data[mntpoint][name]; ok {
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rate := float64(newVal-old) / timeDiff
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if m.shouldOutput(baseName) {
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msg, err := lp.NewMessage(fmt.Sprintf("nfsio_%s_bw", baseName), m.tags, m.meta, map[string]interface{}{"value": rate}, now)
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if err == nil {
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if strings.HasPrefix(name, "page") {
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msg.AddMeta("unit", "4K_pages/s")
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} else {
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msg.AddMeta("unit", "bytes/sec")
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}
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msg.AddTag("stype", "filesystem")
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msg.AddTag("stype-id", mntpoint)
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output <- msg
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}
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}
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}
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}
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if m.data[mntpoint] == nil {
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m.data[mntpoint] = make(map[string]int64)
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}
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m.data[mntpoint][name] = newVal
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}
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}
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// Reset entries that do not exist anymore
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// Remove mountpoints that no longer exist.
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for mntpoint := range m.data {
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found := false
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for new := range newdata {
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if new == mntpoint {
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for newMnt := range newdata {
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if newMnt == mntpoint {
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found = true
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break
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}
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@ -157,10 +212,8 @@ func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMessa
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m.data[mntpoint] = nil
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}
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}
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}
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func (m *NfsIOStatCollector) Close() {
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// Unset flag
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m.init = false
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}
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@ -3,25 +3,42 @@
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```json
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"nfsiostat": {
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"exclude_metrics": [
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"nfsio_oread"
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"oread", "pageread"
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],
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"exclude_filesystems" : [
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"/mnt",
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"only_metrics": [
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"nread", "nwrite", "nfsread", "nfswrite"
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],
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"use_server_as_stype": false
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"exclude_filesystem": [
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"/mnt"
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],
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"use_server_as_stype": false,
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"send_abs_values": false,
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"send_derived_values": true
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}
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```
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The `nfsiostat` collector reads data from `/proc/self/mountstats` and outputs a handful **node** metrics for each NFS filesystem. If a metric or filesystem is not required, it can be excluded from forwarding it to the sink.
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The `nfsiostat` collector reads data from `/proc/self/mountstats` and outputs a handful **node**s metrics for each NFS filesystem.
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Metrics are output with the prefix `nfsio_` and the base metric name (e.g. `nread`, `nwrite`, etc.). Filtering applies to the base metric name (without the `nfsio_` prefix).
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Metrics:
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* `nfsio_nread`: Bytes transferred by normal `read()` calls
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* `nfsio_nwrite`: Bytes transferred by normal `write()` calls
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* `nfsio_oread`: Bytes transferred by `read()` calls with `O_DIRECT`
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* `nfsio_owrite`: Bytes transferred by `write()` calls with `O_DIRECT`
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* `nfsio_pageread`: Pages transferred by `read()` calls
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* `nfsio_pagewrite`: Pages transferred by `write()` calls
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* `nfsio_nfsread`: Bytes transferred for reading from the server
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* `nfsio_nfswrite`: Pages transferred by writing to the server
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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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The `nfsiostat` collector adds the mountpoint to the tags as `stype=filesystem,stype-id=<mountpoint>`. If the server address should be used instead of the mountpoint, use the `use_server_as_stype` config setting.
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Metrics are categorized as follows:
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**Absolute Metrics:**
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- `nfsio_nread`: Bytes transferred by normal read() calls
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- `nfsio_nwrite`: Bytes transferred by normal write() calls
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- `nfsio_oread`: Bytes transferred by read() calls with O_DIRECT
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- `nfsio_owrite`: Bytes transferred by write() calls with O_DIRECT
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- `nfsio_pageread`: Pages transferred by read() calls
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- `nfsio_pagewrite`: Pages transferred by write() calls
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- `nfsio_nfsread`: Bytes transferred for reading from the server
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- `nfsio_nfswrite`: Bytes transferred for writing to the server
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**Derived Metrics:**
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For each absolute metric, if `send_derived_values` is enabled, an additional metric is sent with the `_bw` suffix, representing the rate:
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- For byte metrics: `unit=bytes/sec`
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- For page metrics: `unit=4K_pages/s`
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The `nfsiostat` collector adds the mountpoint to the tags as `stype=filesystem,stype-id=<mountpoint>`. If the server address should be used instead of the mountpoint, use the `use_server_as_stype` config setting.
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