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|
package widgets
import (
"fmt"
"log"
"sort"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
psDisk "github.com/shirou/gopsutil/disk"
ui "github.com/xxxserxxx/gotop/v3/termui"
"github.com/xxxserxxx/gotop/v3/utils"
)
type Partition struct {
Device string
MountPoint string
BytesRead uint64
BytesWritten uint64
BytesReadRecently string
BytesWrittenRecently string
UsedPercent uint32
Free string
}
type DiskWidget struct {
*ui.Table
updateInterval time.Duration
Partitions map[string]*Partition
metric map[string]prometheus.Gauge
}
func NewDiskWidget() *DiskWidget {
self := &DiskWidget{
Table: ui.NewTable(),
updateInterval: time.Second,
Partitions: make(map[string]*Partition),
}
self.Title = " Disk Usage "
self.Header = []string{"Disk", "Mount", "Used", "Free", "R/s", "W/s"}
self.ColGap = 2
self.ColResizer = func() {
self.ColWidths = []int{
utils.MaxInt(4, (self.Inner.Dx()-29)/2),
utils.MaxInt(5, (self.Inner.Dx()-29)/2),
4, 5, 5, 5,
}
}
self.update()
go func() {
for range time.NewTicker(self.updateInterval).C {
self.Lock()
self.update()
self.Unlock()
}
}()
return self
}
func (self *DiskWidget) EnableMetric() {
self.metric = make(map[string]prometheus.Gauge)
for key, part := range self.Partitions {
gauge := prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "gotop",
Subsystem: "disk",
Name: strings.ReplaceAll(key, "/", ":"),
//Name: strings.Replace(strings.Replace(part.Device, "/dev/", "", -1), "mapper/", "", -1),
})
gauge.Set(float64(part.UsedPercent) / 100.0)
prometheus.MustRegister(gauge)
self.metric[key] = gauge
}
}
func (self *DiskWidget) update() {
partitions, err := psDisk.Partitions(false)
if err != nil {
log.Printf("failed to get disk partitions from gopsutil: %v", err)
return
}
// add partition if it's new
for _, partition := range partitions {
// don't show loop devices
if strings.HasPrefix(partition.Device, "/dev/loop") {
continue
}
// don't show docker container filesystems
if strings.HasPrefix(partition.Mountpoint, "/var/lib/docker/") {
continue
}
// check if partition doesn't already exist in our list
if _, ok := self.Partitions[partition.Device]; !ok {
self.Partitions[partition.Device] = &Partition{
Device: partition.Device,
MountPoint: partition.Mountpoint,
}
}
}
// delete a partition if it no longer exists
toDelete := []string{}
for device := range self.Partitions {
exists := false
for _, partition := range partitions {
if device == partition.Device {
exists = true
break
}
}
if !exists {
toDelete = append(toDelete, device)
}
}
for _, device := range toDelete {
delete(self.Partitions, device)
}
// updates partition info. We add 0.5 to all values to make sure the truncation rounds
for _, partition := range self.Partitions {
usage, err := psDisk.Usage(partition.MountPoint)
if err != nil {
log.Printf("failed to get partition usage statistics from gopsutil: %v. partition: %v", err, partition)
continue
}
partition.UsedPercent = uint32(usage.UsedPercent + 0.5)
bytesFree, magnitudeFree := utils.ConvertBytes(usage.Free)
partition.Free = fmt.Sprintf("%3d%s", uint64(bytesFree+0.5), magnitudeFree)
ioCounters, err := psDisk.IOCounters(partition.Device)
if err != nil {
log.Printf("failed to get partition read/write info from gopsutil: %v. partition: %v", err, partition)
continue
}
ioCounter := ioCounters[strings.Replace(partition.Device, "/dev/", "", -1)]
bytesRead, bytesWritten := ioCounter.ReadBytes, ioCounter.WriteBytes
if partition.BytesRead != 0 { // if this isn't the first update
bytesReadRecently := bytesRead - partition.BytesRead
bytesWrittenRecently := bytesWritten - partition.BytesWritten
readFloat, readMagnitude := utils.ConvertBytes(bytesReadRecently)
writeFloat, writeMagnitude := utils.ConvertBytes(bytesWrittenRecently)
bytesReadRecently, bytesWrittenRecently = uint64(readFloat+0.5), uint64(writeFloat+0.5)
partition.BytesReadRecently = fmt.Sprintf("%d%s", bytesReadRecently, readMagnitude)
partition.BytesWrittenRecently = fmt.Sprintf("%d%s", bytesWrittenRecently, writeMagnitude)
} else {
partition.BytesReadRecently = fmt.Sprintf("%d%s", 0, "B")
partition.BytesWrittenRecently = fmt.Sprintf("%d%s", 0, "B")
}
partition.BytesRead, partition.BytesWritten = bytesRead, bytesWritten
}
// converts self.Partitions into self.Rows which is a [][]String
sortedPartitions := []string{}
for seriesName := range self.Partitions {
sortedPartitions = append(sortedPartitions, seriesName)
}
sort.Strings(sortedPartitions)
self.Rows = make([][]string, len(self.Partitions))
for i, key := range sortedPartitions {
partition := self.Partitions[key]
self.Rows[i] = make([]string, 6)
self.Rows[i][0] = strings.Replace(strings.Replace(partition.Device, "/dev/", "", -1), "mapper/", "", -1)
self.Rows[i][1] = partition.MountPoint
self.Rows[i][2] = fmt.Sprintf("%d%%", partition.UsedPercent)
self.Rows[i][3] = partition.Free
self.Rows[i][4] = partition.BytesReadRecently
self.Rows[i][5] = partition.BytesWrittenRecently
if self.metric != nil {
if self.metric[key] == nil {
log.Printf("ERROR: missing metric %s", key)
} else {
self.metric[key].Set(float64(partition.UsedPercent) / 100.0)
}
}
}
}
|
