telegraf/plugins/inputs/passenger/passenger.go

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package passenger
import (
"bytes"
"encoding/xml"
"fmt"
"os/exec"
"strconv"
"strings"
"github.com/influxdb/telegraf/plugins/inputs"
"golang.org/x/net/html/charset"
)
type passenger struct {
Command string
}
func (p *passenger) parseCommand() (string, []string) {
var arguments []string
if !strings.Contains(p.Command, " ") {
return p.Command, arguments
}
arguments = strings.Split(p.Command, " ")
if len(arguments) == 1 {
return arguments[0], arguments[1:]
}
return arguments[0], arguments[1:]
}
type info struct {
Passenger_version string `xml:"passenger_version"`
Process_count int `xml:"process_count"`
Capacity_used int `xml:"capacity_used"`
Get_wait_list_size int `xml:"get_wait_list_size"`
Max int `xml:"max"`
Supergroups struct {
Supergroup []struct {
Name string `xml:"name"`
Get_wait_list_size int `xml:"get_wait_list_size"`
Capacity_used int `xml:"capacity_used"`
Group []struct {
Name string `xml:"name"`
AppRoot string `xml:"app_root"`
AppType string `xml:"app_type"`
Enabled_process_count int `xml:"enabled_process_count"`
Disabling_process_count int `xml:"disabling_process_count"`
Disabled_process_count int `xml:"disabled_process_count"`
Capacity_used int `xml:"capacity_used"`
Get_wait_list_size int `xml:"get_wait_list_size"`
Processes_being_spawned int `xml:"processes_being_spawned"`
Processes struct {
Process []*process `xml:"process"`
} `xml:"processes"`
} `xml:"group"`
} `xml:"supergroup"`
} `xml:"supergroups"`
}
type process struct {
Pid int `xml:"pid"`
Concurrency int `xml:"concurrency"`
Sessions int `xml:"sessions"`
Busyness int `xml:"busyness"`
Processed int `xml:"processed"`
Spawner_creation_time int64 `xml:"spawner_creation_time"`
Spawn_start_time int64 `xml:"spawn_start_time"`
Spawn_end_time int64 `xml:"spawn_end_time"`
Last_used int64 `xml:"last_used"`
Uptime string `xml:"uptime"`
Code_revision string `xml:"code_revision"`
Life_status string `xml:"life_status"`
Enabled string `xml:"enabled"`
Has_metrics bool `xml:"has_metrics"`
Cpu int64 `xml:"cpu"`
Rss int64 `xml:"rss"`
Pss int64 `xml:"pss"`
Private_dirty int64 `xml:"private_dirty"`
Swap int64 `xml:"swap"`
Real_memory int64 `xml:"real_memory"`
Vmsize int64 `xml:"vmsize"`
Process_group_id string `xml:"process_group_id"`
}
func (p *process) getUptime() int64 {
if p.Uptime == "" {
return 0
}
timeSlice := strings.Split(p.Uptime, " ")
var uptime int64
uptime = 0
for _, v := range timeSlice {
switch {
case strings.HasSuffix(v, "d"):
iValue := strings.TrimSuffix(v, "d")
value, err := strconv.ParseInt(iValue, 10, 64)
if err == nil {
uptime += value * (24 * 60 * 60)
}
case strings.HasSuffix(v, "h"):
iValue := strings.TrimSuffix(v, "y")
value, err := strconv.ParseInt(iValue, 10, 64)
if err == nil {
uptime += value * (60 * 60)
}
case strings.HasSuffix(v, "m"):
iValue := strings.TrimSuffix(v, "m")
value, err := strconv.ParseInt(iValue, 10, 64)
if err == nil {
uptime += value * 60
}
case strings.HasSuffix(v, "s"):
iValue := strings.TrimSuffix(v, "s")
value, err := strconv.ParseInt(iValue, 10, 64)
if err == nil {
uptime += value
}
}
}
return uptime
}
var sampleConfig = `
# Path of passenger-status.
#
# Plugin gather metric via parsing XML output of passenger-status
# More information about the tool:
# https://www.phusionpassenger.com/library/admin/apache/overall_status_report.html
#
#
# If no path is specified, then the plugin simply execute passenger-status
# hopefully it can be found in your PATH
command = "passenger-status -v --show=xml"
`
func (r *passenger) SampleConfig() string {
return sampleConfig
}
func (r *passenger) Description() string {
return "Read metrics of passenger using passenger-status"
}
func (g *passenger) Gather(acc inputs.Accumulator) error {
if g.Command == "" {
g.Command = "passenger-status -v --show=xml"
}
cmd, args := g.parseCommand()
out, err := exec.Command(cmd, args...).Output()
if err != nil {
return err
}
if err = importMetric(out, acc); err != nil {
return err
}
return nil
}
func importMetric(stat []byte, acc inputs.Accumulator) error {
var p info
decoder := xml.NewDecoder(bytes.NewReader(stat))
decoder.CharsetReader = charset.NewReaderLabel
if err := decoder.Decode(&p); err != nil {
return fmt.Errorf("Cannot parse input with error: %v\n", err)
}
tags := map[string]string{
"passenger_version": p.Passenger_version,
}
fields := map[string]interface{}{
"process_count": p.Process_count,
"max": p.Max,
"capacity_used": p.Capacity_used,
"get_wait_list_size": p.Get_wait_list_size,
}
acc.AddFields("passenger", fields, tags)
for _, sg := range p.Supergroups.Supergroup {
tags := map[string]string{
"name": sg.Name,
}
fields := map[string]interface{}{
"get_wait_list_size": sg.Get_wait_list_size,
"capacity_used": sg.Capacity_used,
}
acc.AddFields("passenger_supergroup", fields, tags)
for _, group := range sg.Group {
tags := map[string]string{
"name": group.Name,
"app_root": group.AppRoot,
"app_type": group.AppType,
}
fields := map[string]interface{}{
"get_wait_list_size": group.Get_wait_list_size,
"capacity_used": group.Capacity_used,
"processes_being_spawned": group.Processes_being_spawned,
}
acc.AddFields("passenger_group", fields, tags)
for _, process := range group.Processes.Process {
tags := map[string]string{
"group_name": group.Name,
"app_root": group.AppRoot,
"supergroup_name": sg.Name,
"pid": fmt.Sprintf("%d", process.Pid),
"code_revision": process.Code_revision,
"life_status": process.Life_status,
"process_group_id": process.Process_group_id,
}
fields := map[string]interface{}{
"concurrency": process.Concurrency,
"sessions": process.Sessions,
"busyness": process.Busyness,
"processed": process.Processed,
"spawner_creation_time": process.Spawner_creation_time,
"spawn_start_time": process.Spawn_start_time,
"spawn_end_time": process.Spawn_end_time,
"last_used": process.Last_used,
"uptime": process.getUptime(),
"cpu": process.Cpu,
"rss": process.Rss,
"pss": process.Pss,
"private_dirty": process.Private_dirty,
"swap": process.Swap,
"real_memory": process.Real_memory,
"vmsize": process.Vmsize,
}
acc.AddFields("passenger_process", fields, tags)
}
}
}
return nil
}
func init() {
inputs.Add("passenger", func() inputs.Input {
return &passenger{}
})
}