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diskstatMetric.go
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diskstatMetric.go
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package collectors
import (
"bufio"
"encoding/json"
"os"
"strings"
"syscall"
"time"
cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
)
// "log"
const MOUNTFILE = `/proc/self/mounts`
type DiskstatCollectorConfig struct {
ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
}
type DiskstatCollector struct {
metricCollector
//matches map[string]int
config IOstatCollectorConfig
//devices map[string]IOstatCollectorEntry
}
func (m *DiskstatCollector) Init(config json.RawMessage) error {
m.name = "DiskstatCollector"
m.parallel = true
m.meta = map[string]string{"source": m.name, "group": "Disk"}
m.setup()
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
file, err := os.Open(string(MOUNTFILE))
if err != nil {
cclog.ComponentError(m.name, err.Error())
return err
}
defer file.Close()
m.init = true
return nil
}
func (m *DiskstatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
file, err := os.Open(string(MOUNTFILE))
if err != nil {
cclog.ComponentError(m.name, err.Error())
return
}
defer file.Close()
part_max_used := uint64(0)
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
if len(line) == 0 {
continue
}
if !strings.HasPrefix(line, "/dev") {
continue
}
linefields := strings.Fields(line)
if strings.Contains(linefields[0], "loop") {
continue
}
if strings.Contains(linefields[1], "boot") {
continue
}
path := strings.Replace(linefields[1], `\040`, " ", -1)
stat := syscall.Statfs_t{
Blocks: 0,
Bsize: 0,
Bfree: 0,
}
err := syscall.Statfs(path, &stat)
if err != nil {
continue
}
if stat.Blocks == 0 || stat.Bsize == 0 {
continue
}
tags := map[string]string{"type": "node", "device": linefields[0]}
total := (stat.Blocks * uint64(stat.Bsize)) / uint64(1000000000)
y, err := lp.New("disk_total", tags, m.meta, map[string]interface{}{"value": total}, time.Now())
if err == nil {
y.AddMeta("unit", "GBytes")
output <- y
}
free := (stat.Bfree * uint64(stat.Bsize)) / uint64(1000000000)
y, err = lp.New("disk_free", tags, m.meta, map[string]interface{}{"value": free}, time.Now())
if err == nil {
y.AddMeta("unit", "GBytes")
output <- y
}
if total > 0 {
perc := (100 * (total - free)) / total
if perc > part_max_used {
part_max_used = perc
}
}
}
y, err := lp.New("part_max_used", map[string]string{"type": "node"}, m.meta, map[string]interface{}{"value": int(part_max_used)}, time.Now())
if err == nil {
y.AddMeta("unit", "percent")
output <- y
}
}
func (m *DiskstatCollector) Close() {
m.init = false
}