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nfsMetric.go
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nfsMetric.go
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package collectors
import (
"encoding/json"
"fmt"
"log"
// "os"
"os/exec"
"strconv"
"strings"
"time"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
// First part contains the code for the general NfsCollector.
// Later, the general NfsCollector is more limited to Nfs3- and Nfs4Collector.
const NFSSTAT_EXEC = `nfsstat`
type NfsCollectorData struct {
current int64
last int64
}
type nfsCollector struct {
metricCollector
tags map[string]string
version string
config struct {
Nfsstats string `json:"nfsstat"`
ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
}
data map[string]NfsCollectorData
}
func (m *nfsCollector) initStats() error {
cmd := exec.Command(m.config.Nfsstats, `-l`, `--all`)
cmd.Wait()
buffer, err := cmd.Output()
if err == nil {
for _, line := range strings.Split(string(buffer), "\n") {
lf := strings.Fields(line)
if len(lf) != 5 {
continue
}
if lf[1] == m.version {
name := strings.Trim(lf[3], ":")
if _, exist := m.data[name]; !exist {
value, err := strconv.ParseInt(lf[4], 0, 64)
if err == nil {
x := m.data[name]
x.current = value
x.last = value
m.data[name] = x
}
}
}
}
}
return err
}
func (m *nfsCollector) updateStats() error {
cmd := exec.Command(m.config.Nfsstats, `-l`, `--all`)
cmd.Wait()
buffer, err := cmd.Output()
if err == nil {
for _, line := range strings.Split(string(buffer), "\n") {
lf := strings.Fields(line)
if len(lf) != 5 {
continue
}
if lf[1] == m.version {
name := strings.Trim(lf[3], ":")
if _, exist := m.data[name]; exist {
value, err := strconv.ParseInt(lf[4], 0, 64)
if err == nil {
x := m.data[name]
x.last = x.current
x.current = value
m.data[name] = x
}
}
}
}
}
return err
}
func (m *nfsCollector) MainInit(config json.RawMessage) error {
m.config.Nfsstats = string(NFSSTAT_EXEC)
// Read JSON configuration
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
log.Print(err.Error())
return err
}
}
m.meta = map[string]string{
"source": m.name,
"group": "NFS",
}
m.tags = map[string]string{
"type": "node",
}
// Check if nfsstat is in executable search path
_, err := exec.LookPath(m.config.Nfsstats)
if err != nil {
return fmt.Errorf("NfsCollector.Init(): Failed to find nfsstat binary '%s': %v", m.config.Nfsstats, err)
}
m.data = make(map[string]NfsCollectorData)
m.initStats()
m.init = true
return nil
}
func (m *nfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
timestamp := time.Now()
m.updateStats()
prefix := ""
switch m.version {
case "v3":
prefix = "nfs3"
case "v4":
prefix = "nfs4"
default:
prefix = "nfs"
}
for name, data := range m.data {
if _, skip := stringArrayContains(m.config.ExcludeMetrics, name); skip {
continue
}
value := data.current - data.last
y, err := lp.New(fmt.Sprintf("%s_%s", prefix, name), m.tags, m.meta, map[string]interface{}{"value": value}, timestamp)
if err == nil {
y.AddMeta("version", m.version)
output <- y
}
}
}
func (m *nfsCollector) Close() {
m.init = false
}
type Nfs3Collector struct {
nfsCollector
}
type Nfs4Collector struct {
nfsCollector
}
func (m *Nfs3Collector) Init(config json.RawMessage) error {
m.name = "Nfs3Collector"
m.version = `v3`
m.setup()
return m.MainInit(config)
}
func (m *Nfs4Collector) Init(config json.RawMessage) error {
m.name = "Nfs4Collector"
m.version = `v4`
m.setup()
return m.MainInit(config)
}