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Merge pull request #22 from programokey/feature/prometheus
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| package system | ||
|
|
||
| import ( | ||
| "github.com/go-kit/kit/metrics" | ||
| "github.com/go-kit/kit/metrics/prometheus" | ||
| stdprometheus "github.com/prometheus/client_golang/prometheus" | ||
| "time" | ||
| "fmt" | ||
| "os/exec" | ||
| "io/ioutil" | ||
| "strings" | ||
| "strconv" | ||
| "errors" | ||
| "github.com/shirou/gopsutil/process" | ||
| "github.com/shirou/gopsutil/disk" | ||
| ) | ||
| type Metrics struct{ | ||
| CPUUtilization metrics.Gauge | ||
| MemoUtilization metrics.Gauge | ||
| OpenedFilesNum metrics.Gauge | ||
| DirSize metrics.Gauge | ||
| } | ||
|
|
||
|
|
||
| // PrometheusMetrics returns Metrics build using Prometheus client library. | ||
| func PrometheusMetrics() *Metrics { | ||
| return &Metrics{ | ||
| CPUUtilization:prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{ | ||
| Subsystem: "system", | ||
| Name: "CPU_Percent", | ||
| Help: "CPU Utilization Percantage", | ||
| }, []string{}), | ||
| MemoUtilization:prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{ | ||
| Subsystem: "system", | ||
| Name: "Memo_Percent", | ||
| Help: "Memo Utilization Percantage", | ||
| }, []string{}), | ||
| OpenedFilesNum:prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{ | ||
| Subsystem: "system", | ||
| Name: "Opened_Files_Number", | ||
| Help: "Number of Opened Files, socket and other IO is included", | ||
| }, []string{}), | ||
| DirSize: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{ | ||
| Subsystem: "system", | ||
| Name: "Directory_Size", | ||
| Help: "total size of files in given directory (in bytes)", | ||
| }, []string{}), | ||
| } | ||
| } | ||
|
|
||
| func Monitor(command string, dir_path string, metrics *Metrics)(error){ | ||
| pid, err := getPid(command) | ||
| if err != nil{ | ||
| return err | ||
| } | ||
| go func(){ | ||
| for{ | ||
| time.Sleep(1*time.Second) | ||
| metrics.RecordMetrics(int32(pid), dir_path) | ||
| } | ||
| }() | ||
| return nil | ||
| } | ||
|
|
||
| func (metrics Metrics)RecordMetrics(pid int32, dir_path string) { | ||
| proc := process.Process{Pid:pid} | ||
|
|
||
| if cpu_util, err := proc.CPUPercent();err != nil{ | ||
| metrics.CPUUtilization.Set(float64(-1)) | ||
| }else{ | ||
| metrics.CPUUtilization.Set(cpu_util) | ||
| } | ||
|
|
||
| if memo_util, err := proc.MemoryPercent();err != nil{ | ||
| metrics.MemoUtilization.Set(float64(-1)) | ||
| }else { | ||
| metrics.MemoUtilization.Set(float64(memo_util)) | ||
| } | ||
|
|
||
| if files, err := proc.OpenFiles();err != nil{ | ||
| metrics.OpenedFilesNum.Set(float64(-1)) | ||
| }else { | ||
| metrics.OpenedFilesNum.Set(float64(len(files))) | ||
| } | ||
|
|
||
| if usage, err := disk.Usage(dir_path); err != nil{ | ||
| metrics.DirSize.Set(float64(-1)) | ||
| }else{ | ||
| metrics.DirSize.Set(float64(usage.Used)) | ||
| } | ||
| } | ||
|
|
||
| //get the pid of process that start by the given command | ||
| //the first pid return by "ps -aux|grep <command>", | ||
| // the process whose command contains "grep" is omitted | ||
| func getPid(command string)(pid int, err error){ | ||
| command_str := fmt.Sprintf("ps -aux|grep '%s'", command) | ||
| cmd := exec.Command("/bin/bash", "-c", command_str) | ||
|
|
||
| stdout, err := cmd.StdoutPipe() | ||
|
|
||
| if err != nil{ | ||
| fmt.Printf("Error:can not obtain stdout pipe for command:%s\n", err) | ||
| return 0, err | ||
| } | ||
|
|
||
| if err := cmd.Start(); err != nil { | ||
| fmt.Println("Error:Invalid command,", err) | ||
| return 0, err | ||
| } | ||
|
|
||
| bytes, err := ioutil.ReadAll(stdout) | ||
| if err != nil { | ||
| fmt.Println("ReadAll Stdout:", err.Error()) | ||
| return 0, err | ||
| } | ||
| for _, item := range (strings.Split(string(bytes), "\n")){ | ||
| if !strings.Contains(item, "grep"){ | ||
| for j, s := range (strings.Split(item, " ")){ | ||
| if j > 0 && s != ""{ | ||
| pid, err = strconv.Atoi(s) | ||
| if err == nil{ | ||
| return pid, nil | ||
| }else { | ||
| return 0, err | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return 0, errors.New("cannot find the process") | ||
| } |