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