123 lines
2.5 KiB
Go
123 lines
2.5 KiB
Go
// +build linux
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package disk
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import (
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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common "github.com/influxdb/telegraf/plugins/system/ps/common"
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)
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const (
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SectorSize = 512
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)
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// Get disk partitions.
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// should use setmntent(3) but this implement use /etc/mtab file
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func DiskPartitions(all bool) ([]DiskPartitionStat, error) {
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filename := "/etc/mtab"
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lines, err := common.ReadLines(filename)
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if err != nil {
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return nil, err
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}
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ret := make([]DiskPartitionStat, 0, len(lines))
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for _, line := range lines {
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fields := strings.Fields(line)
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d := DiskPartitionStat{
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Device: fields[0],
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Mountpoint: fields[1],
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Fstype: fields[2],
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Opts: fields[3],
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}
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ret = append(ret, d)
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}
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return ret, nil
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}
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func DiskIOCounters() (map[string]DiskIOCountersStat, error) {
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filename := "/proc/diskstats"
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lines, err := common.ReadLines(filename)
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if err != nil {
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return nil, err
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}
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ret := make(map[string]DiskIOCountersStat, 0)
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empty := DiskIOCountersStat{}
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for _, line := range lines {
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fields := strings.Fields(line)
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name := fields[2]
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reads, err := strconv.ParseUint((fields[3]), 10, 64)
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if err != nil {
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return ret, err
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}
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rbytes, err := strconv.ParseUint((fields[5]), 10, 64)
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if err != nil {
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return ret, err
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}
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rtime, err := strconv.ParseUint((fields[6]), 10, 64)
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if err != nil {
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return ret, err
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}
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writes, err := strconv.ParseUint((fields[7]), 10, 64)
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if err != nil {
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return ret, err
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}
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wbytes, err := strconv.ParseUint((fields[9]), 10, 64)
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if err != nil {
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return ret, err
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}
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wtime, err := strconv.ParseUint((fields[10]), 10, 64)
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if err != nil {
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return ret, err
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}
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iotime, err := strconv.ParseUint((fields[12]), 10, 64)
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if err != nil {
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return ret, err
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}
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d := DiskIOCountersStat{
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ReadBytes: rbytes * SectorSize,
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WriteBytes: wbytes * SectorSize,
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ReadCount: reads,
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WriteCount: writes,
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ReadTime: rtime,
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WriteTime: wtime,
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IoTime: iotime,
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}
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if d == empty {
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continue
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}
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d.Name = name
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d.SerialNumber = GetDiskSerialNumber(name)
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ret[name] = d
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}
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return ret, nil
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}
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func GetDiskSerialNumber(name string) string {
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n := fmt.Sprintf("--name=%s", name)
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out, err := exec.Command("/sbin/udevadm", "info", "--query=property", n).Output()
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// does not return error, just an empty string
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if err != nil {
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return ""
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}
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lines := strings.Split(string(out), "\n")
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for _, line := range lines {
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values := strings.Split(line, "=")
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if len(values) < 2 || values[0] != "ID_SERIAL" {
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// only get ID_SERIAL, not ID_SERIAL_SHORT
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continue
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}
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return values[1]
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}
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return ""
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}
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