telegraf/plugins/inputs/phpfpm/phpfpm.go

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package phpfpm
import (
"bufio"
"bytes"
"fmt"
"io"
"net/http"
"net/url"
"os"
"strconv"
"strings"
"sync"
"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
)
const (
PF_POOL = "pool"
PF_PROCESS_MANAGER = "process manager"
PF_ACCEPTED_CONN = "accepted conn"
PF_LISTEN_QUEUE = "listen queue"
PF_MAX_LISTEN_QUEUE = "max listen queue"
PF_LISTEN_QUEUE_LEN = "listen queue len"
PF_IDLE_PROCESSES = "idle processes"
PF_ACTIVE_PROCESSES = "active processes"
PF_TOTAL_PROCESSES = "total processes"
PF_MAX_ACTIVE_PROCESSES = "max active processes"
PF_MAX_CHILDREN_REACHED = "max children reached"
PF_SLOW_REQUESTS = "slow requests"
)
type metric map[string]int64
type poolStat map[string]metric
type phpfpm struct {
Urls []string
client *http.Client
}
var sampleConfig = `
## An array of addresses to gather stats about. Specify an ip or hostname
## with optional port and path
##
## Plugin can be configured in three modes (either can be used):
## - http: the URL must start with http:// or https://, ie:
## "http://localhost/status"
## "http://192.168.130.1/status?full"
##
## - unixsocket: path to fpm socket, ie:
## "/var/run/php5-fpm.sock"
## or using a custom fpm status path:
## "/var/run/php5-fpm.sock:fpm-custom-status-path"
##
## - fcgi: the URL must start with fcgi:// or cgi://, and port must be present, ie:
## "fcgi://10.0.0.12:9000/status"
## "cgi://10.0.10.12:9001/status"
##
## Example of multiple gathering from local socket and remove host
## urls = ["http://192.168.1.20/status", "/tmp/fpm.sock"]
urls = ["http://localhost/status"]
`
func (r *phpfpm) SampleConfig() string {
return sampleConfig
}
func (r *phpfpm) Description() string {
return "Read metrics of phpfpm, via HTTP status page or socket"
}
// Reads stats from all configured servers accumulates stats.
// Returns one of the errors encountered while gather stats (if any).
func (g *phpfpm) Gather(acc telegraf.Accumulator) error {
if len(g.Urls) == 0 {
return g.gatherServer("http://127.0.0.1/status", acc)
}
var wg sync.WaitGroup
for _, serv := range g.Urls {
wg.Add(1)
go func(serv string) {
defer wg.Done()
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acc.AddError(g.gatherServer(serv, acc))
}(serv)
}
wg.Wait()
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return nil
}
// Request status page to get stat raw data and import it
func (g *phpfpm) gatherServer(addr string, acc telegraf.Accumulator) error {
if g.client == nil {
client := &http.Client{}
g.client = client
}
if strings.HasPrefix(addr, "http://") || strings.HasPrefix(addr, "https://") {
return g.gatherHttp(addr, acc)
}
var (
fcgi *conn
socketPath string
statusPath string
)
var err error
if strings.HasPrefix(addr, "fcgi://") || strings.HasPrefix(addr, "cgi://") {
u, err := url.Parse(addr)
if err != nil {
return fmt.Errorf("Unable parse server address '%s': %s", addr, err)
}
socketAddr := strings.Split(u.Host, ":")
fcgiIp := socketAddr[0]
fcgiPort, _ := strconv.Atoi(socketAddr[1])
fcgi, err = newFcgiClient(fcgiIp, fcgiPort)
if err != nil {
return err
}
if len(u.Path) > 1 {
statusPath = strings.Trim(u.Path, "/")
} else {
statusPath = "status"
}
} else {
socketAddr := strings.Split(addr, ":")
if len(socketAddr) >= 2 {
socketPath = socketAddr[0]
statusPath = socketAddr[1]
} else {
socketPath = socketAddr[0]
statusPath = "status"
}
if _, err := os.Stat(socketPath); os.IsNotExist(err) {
return fmt.Errorf("Socket doesn't exist '%s': %s", socketPath, err)
}
fcgi, err = newFcgiClient("unix", socketPath)
}
if err != nil {
return err
}
return g.gatherFcgi(fcgi, statusPath, acc)
}
// Gather stat using fcgi protocol
func (g *phpfpm) gatherFcgi(fcgi *conn, statusPath string, acc telegraf.Accumulator) error {
fpmOutput, fpmErr, err := fcgi.Request(map[string]string{
"SCRIPT_NAME": "/" + statusPath,
"SCRIPT_FILENAME": statusPath,
"REQUEST_METHOD": "GET",
"CONTENT_LENGTH": "0",
"SERVER_PROTOCOL": "HTTP/1.0",
"SERVER_SOFTWARE": "go / fcgiclient ",
"REMOTE_ADDR": "127.0.0.1",
}, "/"+statusPath)
if len(fpmErr) == 0 && err == nil {
importMetric(bytes.NewReader(fpmOutput), acc)
return nil
} else {
return fmt.Errorf("Unable parse phpfpm status. Error: %v %v", string(fpmErr), err)
}
}
// Gather stat using http protocol
func (g *phpfpm) gatherHttp(addr string, acc telegraf.Accumulator) error {
u, err := url.Parse(addr)
if err != nil {
return fmt.Errorf("Unable parse server address '%s': %s", addr, err)
}
req, err := http.NewRequest("GET", fmt.Sprintf("%s://%s%s", u.Scheme,
u.Host, u.Path), nil)
res, err := g.client.Do(req)
if err != nil {
return fmt.Errorf("Unable to connect to phpfpm status page '%s': %v",
addr, err)
}
defer res.Body.Close()
if res.StatusCode != 200 {
return fmt.Errorf("Unable to get valid stat result from '%s': %v",
addr, err)
}
importMetric(res.Body, acc)
return nil
}
// Import stat data into Telegraf system
func importMetric(r io.Reader, acc telegraf.Accumulator) (poolStat, error) {
stats := make(poolStat)
var currentPool string
scanner := bufio.NewScanner(r)
for scanner.Scan() {
statLine := scanner.Text()
keyvalue := strings.Split(statLine, ":")
if len(keyvalue) < 2 {
continue
}
fieldName := strings.Trim(keyvalue[0], " ")
// We start to gather data for a new pool here
if fieldName == PF_POOL {
currentPool = strings.Trim(keyvalue[1], " ")
stats[currentPool] = make(metric)
continue
}
// Start to parse metric for current pool
switch fieldName {
case PF_ACCEPTED_CONN,
PF_LISTEN_QUEUE,
PF_MAX_LISTEN_QUEUE,
PF_LISTEN_QUEUE_LEN,
PF_IDLE_PROCESSES,
PF_ACTIVE_PROCESSES,
PF_TOTAL_PROCESSES,
PF_MAX_ACTIVE_PROCESSES,
PF_MAX_CHILDREN_REACHED,
PF_SLOW_REQUESTS:
fieldValue, err := strconv.ParseInt(strings.Trim(keyvalue[1], " "), 10, 64)
if err == nil {
stats[currentPool][fieldName] = fieldValue
}
}
}
// Finally, we push the pool metric
for pool := range stats {
tags := map[string]string{
"pool": pool,
}
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fields := make(map[string]interface{})
for k, v := range stats[pool] {
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fields[strings.Replace(k, " ", "_", -1)] = v
}
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acc.AddFields("phpfpm", fields, tags)
}
return stats, nil
}
func init() {
inputs.Add("phpfpm", func() telegraf.Input {
return &phpfpm{}
})
}