Update CpustatCollector (#36)

* Update cpustat collector

* Update CpustatCollector to use percentages and add 'num_cpus' metric
This commit is contained in:
Thomas Gruber 2022-02-17 15:46:06 +01:00 committed by GitHub
parent 873befb41f
commit 0152c0dc1e
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@ -1,12 +1,15 @@
package collectors
import (
"bufio"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"strconv"
"strings"
"time"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
@ -19,71 +22,127 @@ type CpustatCollectorConfig struct {
type CpustatCollector struct {
metricCollector
config CpustatCollectorConfig
matches map[string]int
cputags map[string]map[string]string
nodetags map[string]string
num_cpus_metric lp.CCMetric
}
func (m *CpustatCollector) Init(config json.RawMessage) error {
m.name = "CpustatCollector"
m.setup()
m.meta = map[string]string{"source": m.name, "group": "CPU"}
m.meta = map[string]string{"source": m.name, "group": "CPU", "unit": "Percent"}
m.nodetags = map[string]string{"type": "node"}
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
matches := map[string]int{
"cpu_user": 1,
"cpu_nice": 2,
"cpu_system": 3,
"cpu_idle": 4,
"cpu_iowait": 5,
"cpu_irq": 6,
"cpu_softirq": 7,
"cpu_steal": 8,
"cpu_guest": 9,
"cpu_guest_nice": 10,
}
m.matches = make(map[string]int)
for match, index := range matches {
doExclude := false
for _, exclude := range m.config.ExcludeMetrics {
if match == exclude {
doExclude = true
break
}
}
if !doExclude {
m.matches[match] = index
}
}
// Check input file
file, err := os.Open(string(CPUSTATFILE))
if err != nil {
cclog.ComponentError(m.name, err.Error())
}
defer file.Close()
// Pre-generate tags for all CPUs
num_cpus := 0
m.cputags = make(map[string]map[string]string)
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
linefields := strings.Fields(line)
if strings.HasPrefix(linefields[0], "cpu") && strings.Compare(linefields[0], "cpu") != 0 {
cpustr := strings.TrimLeft(linefields[0], "cpu")
cpu, _ := strconv.Atoi(cpustr)
m.cputags[linefields[0]] = map[string]string{"type": "cpu", "type-id": fmt.Sprintf("%d", cpu)}
num_cpus++
}
}
m.init = true
return nil
}
func (c *CpustatCollector) parseStatLine(line string, cpu int, exclude []string, output chan lp.CCMetric) {
ls := strings.Fields(line)
matches := []string{"", "cpu_user", "cpu_nice", "cpu_system", "cpu_idle", "cpu_iowait", "cpu_irq", "cpu_softirq", "cpu_steal", "cpu_guest", "cpu_guest_nice"}
for _, ex := range exclude {
matches, _ = RemoveFromStringList(matches, ex)
}
var tags map[string]string
if cpu < 0 {
tags = map[string]string{"type": "node"}
} else {
tags = map[string]string{"type": "cpu", "type-id": fmt.Sprintf("%d", cpu)}
}
for i, m := range matches {
if len(m) > 0 {
x, err := strconv.ParseInt(ls[i], 0, 64)
func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]string, output chan lp.CCMetric) {
values := make(map[string]float64)
total := 0.0
for match, index := range m.matches {
if len(match) > 0 {
x, err := strconv.ParseInt(linefields[index], 0, 64)
if err == nil {
y, err := lp.New(m, tags, c.meta, map[string]interface{}{"value": int(x)}, time.Now())
values[match] = float64(x)
total += values[match]
}
}
}
t := time.Now()
for name, value := range values {
y, err := lp.New(name, tags, m.meta, map[string]interface{}{"value": (value * 100.0) / total}, t)
if err == nil {
output <- y
}
}
}
}
}
func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
buffer, err := ioutil.ReadFile(string(CPUSTATFILE))
num_cpus := 0
file, err := os.Open(string(CPUSTATFILE))
if err != nil {
return
cclog.ComponentError(m.name, err.Error())
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
linefields := strings.Fields(line)
if strings.Compare(linefields[0], "cpu") == 0 {
m.parseStatLine(linefields, m.nodetags, output)
} else if strings.HasPrefix(linefields[0], "cpu") {
m.parseStatLine(linefields, m.cputags[linefields[0]], output)
num_cpus++
}
}
ll := strings.Split(string(buffer), "\n")
for _, line := range ll {
if len(line) == 0 {
continue
}
ls := strings.Fields(line)
if strings.Compare(ls[0], "cpu") == 0 {
m.parseStatLine(line, -1, m.config.ExcludeMetrics, output)
} else if strings.HasPrefix(ls[0], "cpu") {
cpustr := strings.TrimLeft(ls[0], "cpu")
cpu, _ := strconv.Atoi(cpustr)
m.parseStatLine(line, cpu, m.config.ExcludeMetrics, output)
}
num_cpus_metric, err := lp.New("num_cpus",
m.nodetags,
m.meta,
map[string]interface{}{"value": int(num_cpus)},
time.Now(),
)
if err == nil {
output <- num_cpus_metric
}
}