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Add PHPFPM stat 

- HTTP status or Socket status
- Collect those metric:
    accepted conn:
    listen queue:
    max listen queue:
    listen queue len:
    idle processes:
    active processes:
    total processes:
    max active processes:
    max children reached:
    slow requests:
- Tag metric with: `host` and `pool` name

Closes #255
This commit is contained in:
Vinh 2015-10-11 18:36:21 -07:00 committed by Cameron Sparr
parent d394003739
commit 0bc76f094a
5 changed files with 674 additions and 0 deletions
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1
plugins/all/all.go
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@ -14,6 +14,7 @@ import (
_ "github.com/influxdb/telegraf/plugins/mongodb" _ "github.com/influxdb/telegraf/plugins/mongodb"
_ "github.com/influxdb/telegraf/plugins/mysql" _ "github.com/influxdb/telegraf/plugins/mysql"
_ "github.com/influxdb/telegraf/plugins/nginx" _ "github.com/influxdb/telegraf/plugins/nginx"
_ "github.com/influxdb/telegraf/plugins/phpfpm"
_ "github.com/influxdb/telegraf/plugins/ping" _ "github.com/influxdb/telegraf/plugins/ping"
_ "github.com/influxdb/telegraf/plugins/postgresql" _ "github.com/influxdb/telegraf/plugins/postgresql"
_ "github.com/influxdb/telegraf/plugins/procstat" _ "github.com/influxdb/telegraf/plugins/procstat"

73
plugins/phpfpm/README.md Normal file
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@ -0,0 +1,73 @@
# Telegraf plugin: phpfpm
Get phpfpm stat using either HTTP status page or fpm socket.
# Measurements
Meta:
- tags: `url=<ip> pool=poolname`
Measurement names:
- accepted_conn
- listen_queue
- max_listen_queue
- listen_queue_len
- idle_processes
- active_processes
- total_processes
- max_active_processes
- max_children_reached
- slow_requests
# Example output
Using this configuration:
```
[phpfpm]
# An array of address to gather stats about. Specify an ip on hostname
# with optional port and path. ie localhost, 10.10.3.33/server-status, etc.
#
# We can configure int two modes:
# - unixsocket: the string is the path to fpm socket like
# /var/run/php5-fpm.sock
# - http: the URL has to start with http:// or https://
#
# If no servers are specified, then default to 127.0.0.1/server-status
urls = ["http://localhost/status", "10.0.0.12:/var/run/php5-fpm-www2.sock"]
```
When run with:
```
./telegraf -config telegraf.conf -filter phpfpm -test
```
It produces:
```
* Plugin: phpfpm, Collection 1
> [url="10.0.0.12" pool="www"] phpfpm_idle_processes value=1
> [url="10.0.0.12" pool="www"] phpfpm_total_processes value=2
> [url="10.0.0.12" pool="www"] phpfpm_max_children_reached value=0
> [url="10.0.0.12" pool="www"] phpfpm_max_listen_queue value=0
> [url="10.0.0.12" pool="www"] phpfpm_listen_queue value=0
> [url="10.0.0.12" pool="www"] phpfpm_listen_queue_len value=0
> [url="10.0.0.12" pool="www"] phpfpm_active_processes value=1
> [url="10.0.0.12" pool="www"] phpfpm_max_active_processes value=2
> [url="10.0.0.12" pool="www"] phpfpm_slow_requests value=0
> [url="10.0.0.12" pool="www"] phpfpm_accepted_conn value=305
> [url="localhost" pool="www2"] phpfpm_max_children_reached value=0
> [url="localhost" pool="www2"] phpfpm_slow_requests value=0
> [url="localhost" pool="www2"] phpfpm_max_listen_queue value=0
> [url="localhost" pool="www2"] phpfpm_active_processes value=1
> [url="localhost" pool="www2"] phpfpm_listen_queue_len value=0
> [url="localhost" pool="www2"] phpfpm_idle_processes value=1
> [url="localhost" pool="www2"] phpfpm_total_processes value=2
> [url="localhost" pool="www2"] phpfpm_max_active_processes value=2
> [url="localhost" pool="www2"] phpfpm_accepted_conn value=306
> [url="localhost" pool="www2"] phpfpm_listen_queue value=0
```

194
plugins/phpfpm/phpfpm.go Normal file
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@ -0,0 +1,194 @@
package phpfpm
import (
"bufio"
"bytes"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"sync"
"github.com/influxdb/telegraf/plugins"
)
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 two modes (both can be used):
# - http: the URL must start with http:// or https://, ex:
# "http://localhost/status"
# "http://192.168.130.1/status?full"
# - unixsocket: path to fpm socket, ex:
# "/var/run/php5-fpm.sock"
# "192.168.10.10:/var/run/php5-fpm-www2.sock"
#
# If no servers are specified, then default to 127.0.0.1/server-status
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(pending)"
}
// Reads stats from all configured servers accumulates stats.
// Returns one of the errors encountered while gather stats (if any).
func (g *phpfpm) Gather(acc plugins.Accumulator) error {
if len(g.Urls) == 0 {
return g.gatherServer("http://127.0.0.1/status", acc)
}
var wg sync.WaitGroup
var outerr error
for _, serv := range g.Urls {
wg.Add(1)
go func(serv string) {
defer wg.Done()
outerr = g.gatherServer(serv, acc)
}(serv)
}
wg.Wait()
return outerr
}
// Request status page to get stat raw data
func (g *phpfpm) gatherServer(addr string, acc plugins.Accumulator) error {
if g.client == nil {
client := &http.Client{}
g.client = client
}
if strings.HasPrefix(addr, "http://") || strings.HasPrefix(addr, "https://") {
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)
}
if res.StatusCode != 200 {
return fmt.Errorf("Unable to get valid stat result from '%s': %v",
addr, err)
}
importMetric(res.Body, acc, u.Host)
} else {
socketAddr := strings.Split(addr, ":")
fcgi, _ := NewClient("unix", socketAddr[1])
resOut, resErr, err := fcgi.Request(map[string]string{
"SCRIPT_NAME": "/status",
"SCRIPT_FILENAME": "status",
"REQUEST_METHOD": "GET",
}, "")
if len(resErr) == 0 && err == nil {
importMetric(bytes.NewReader(resOut), acc, socketAddr[0])
}
}
return nil
}
// Import HTTP stat data into Telegraf system
func importMetric(r io.Reader, acc plugins.Accumulator, host string) (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{
"url": host,
"pool": pool,
}
for k, v := range stats[pool] {
acc.Add(strings.Replace(k, " ", "_", -1), v, tags)
}
}
return stats, nil
}
func init() {
plugins.Add("phpfpm", func() plugins.Plugin {
return &phpfpm{}
})
}

321
plugins/phpfpm/phpfpm_fcgi.go Normal file
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@ -0,0 +1,321 @@
package phpfpm
// FastCGI client to request via socket
// Copyright 2012 Junqing Tan <ivan@mysqlab.net> and The Go Authors
// Use of this source code is governed by a BSD-style
// Part of source code is from Go fcgi package
// Fix bug: Can't recive more than 1 record untill FCGI_END_REQUEST 2012-09-15
// By: wofeiwo
import (
"bufio"
"bytes"
"encoding/binary"
"errors"
"io"
"net"
"strconv"
"sync"
)
const FCGI_LISTENSOCK_FILENO uint8 = 0
const FCGI_HEADER_LEN uint8 = 8
const VERSION_1 uint8 = 1
const FCGI_NULL_REQUEST_ID uint8 = 0
const FCGI_KEEP_CONN uint8 = 1
const (
FCGI_BEGIN_REQUEST uint8 = iota + 1
FCGI_ABORT_REQUEST
FCGI_END_REQUEST
FCGI_PARAMS
FCGI_STDIN
FCGI_STDOUT
FCGI_STDERR
FCGI_DATA
FCGI_GET_VALUES
FCGI_GET_VALUES_RESULT
FCGI_UNKNOWN_TYPE
FCGI_MAXTYPE = FCGI_UNKNOWN_TYPE
)
const (
FCGI_RESPONDER uint8 = iota + 1
FCGI_AUTHORIZER
FCGI_FILTER
)
const (
FCGI_REQUEST_COMPLETE uint8 = iota
FCGI_CANT_MPX_CONN
FCGI_OVERLOADED
FCGI_UNKNOWN_ROLE
)
const (
FCGI_MAX_CONNS string = "MAX_CONNS"
FCGI_MAX_REQS string = "MAX_REQS"
FCGI_MPXS_CONNS string = "MPXS_CONNS"
)
const (
maxWrite = 6553500 // maximum record body
maxPad = 255
)
type header struct {
Version uint8
Type uint8
Id uint16
ContentLength uint16
PaddingLength uint8
Reserved uint8
}
// for padding so we don't have to allocate all the time
// not synchronized because we don't care what the contents are
var pad [maxPad]byte
func (h *header) init(recType uint8, reqId uint16, contentLength int) {
h.Version = 1
h.Type = recType
h.Id = reqId
h.ContentLength = uint16(contentLength)
h.PaddingLength = uint8(-contentLength & 7)
}
type record struct {
h header
buf [maxWrite + maxPad]byte
}
func (rec *record) read(r io.Reader) (err error) {
if err = binary.Read(r, binary.BigEndian, &rec.h); err != nil {
return err
}
if rec.h.Version != 1 {
return errors.New("fcgi: invalid header version")
}
n := int(rec.h.ContentLength) + int(rec.h.PaddingLength)
if _, err = io.ReadFull(r, rec.buf[:n]); err != nil {
return err
}
return nil
}
func (r *record) content() []byte {
return r.buf[:r.h.ContentLength]
}
type FCGIClient struct {
mutex sync.Mutex
rwc io.ReadWriteCloser
h header
buf bytes.Buffer
keepAlive bool
}
func NewClient(h string, args ...interface{}) (fcgi *FCGIClient, err error) {
var conn net.Conn
if len(args) != 1 {
err = errors.New("fcgi: not enough params")
return
}
switch args[0].(type) {
case int:
addr := h + ":" + strconv.FormatInt(int64(args[0].(int)), 10)
conn, err = net.Dial("tcp", addr)
case string:
laddr := net.UnixAddr{Name: args[0].(string), Net: h}
conn, err = net.DialUnix(h, nil, &laddr)
default:
err = errors.New("fcgi: we only accept int (port) or string (socket) params.")
}
fcgi = &FCGIClient{
rwc: conn,
keepAlive: false,
}
return
}
func (client *FCGIClient) writeRecord(recType uint8, reqId uint16, content []byte) (err error) {
client.mutex.Lock()
defer client.mutex.Unlock()
client.buf.Reset()
client.h.init(recType, reqId, len(content))
if err := binary.Write(&client.buf, binary.BigEndian, client.h); err != nil {
return err
}
if _, err := client.buf.Write(content); err != nil {
return err
}
if _, err := client.buf.Write(pad[:client.h.PaddingLength]); err != nil {
return err
}
_, err = client.rwc.Write(client.buf.Bytes())
return err
}
func (client *FCGIClient) writeBeginRequest(reqId uint16, role uint16, flags uint8) error {
b := [8]byte{byte(role >> 8), byte(role), flags}
return client.writeRecord(FCGI_BEGIN_REQUEST, reqId, b[:])
}
func (client *FCGIClient) writeEndRequest(reqId uint16, appStatus int, protocolStatus uint8) error {
b := make([]byte, 8)
binary.BigEndian.PutUint32(b, uint32(appStatus))
b[4] = protocolStatus
return client.writeRecord(FCGI_END_REQUEST, reqId, b)
}
func (client *FCGIClient) writePairs(recType uint8, reqId uint16, pairs map[string]string) error {
w := newWriter(client, recType, reqId)
b := make([]byte, 8)
for k, v := range pairs {
n := encodeSize(b, uint32(len(k)))
n += encodeSize(b[n:], uint32(len(v)))
if _, err := w.Write(b[:n]); err != nil {
return err
}
if _, err := w.WriteString(k); err != nil {
return err
}
if _, err := w.WriteString(v); err != nil {
return err
}
}
w.Close()
return nil
}
func readSize(s []byte) (uint32, int) {
if len(s) == 0 {
return 0, 0
}
size, n := uint32(s[0]), 1
if size&(1<<7) != 0 {
if len(s) < 4 {
return 0, 0
}
n = 4
size = binary.BigEndian.Uint32(s)
size &^= 1 << 31
}
return size, n
}
func readString(s []byte, size uint32) string {
if size > uint32(len(s)) {
return ""
}
return string(s[:size])
}
func encodeSize(b []byte, size uint32) int {
if size > 127 {
size |= 1 << 31
binary.BigEndian.PutUint32(b, size)
return 4
}
b[0] = byte(size)
return 1
}
// bufWriter encapsulates bufio.Writer but also closes the underlying stream when
// Closed.
type bufWriter struct {
closer io.Closer
*bufio.Writer
}
func (w *bufWriter) Close() error {
if err := w.Writer.Flush(); err != nil {
w.closer.Close()
return err
}
return w.closer.Close()
}
func newWriter(c *FCGIClient, recType uint8, reqId uint16) *bufWriter {
s := &streamWriter{c: c, recType: recType, reqId: reqId}
w := bufio.NewWriterSize(s, maxWrite)
return &bufWriter{s, w}
}
// streamWriter abstracts out the separation of a stream into discrete records.
// It only writes maxWrite bytes at a time.
type streamWriter struct {
c *FCGIClient
recType uint8
reqId uint16
}
func (w *streamWriter) Write(p []byte) (int, error) {
nn := 0
for len(p) > 0 {
n := len(p)
if n > maxWrite {
n = maxWrite
}
if err := w.c.writeRecord(w.recType, w.reqId, p[:n]); err != nil {
return nn, err
}
nn += n
p = p[n:]
}
return nn, nil
}
func (w *streamWriter) Close() error {
// send empty record to close the stream
return w.c.writeRecord(w.recType, w.reqId, nil)
}
func (client *FCGIClient) Request(env map[string]string, reqStr string) (retout []byte, reterr []byte, err error) {
var reqId uint16 = 1
defer client.rwc.Close()
err = client.writeBeginRequest(reqId, uint16(FCGI_RESPONDER), 0)
if err != nil {
return
}
err = client.writePairs(FCGI_PARAMS, reqId, env)
if err != nil {
return
}
if len(reqStr) > 0 {
err = client.writeRecord(FCGI_STDIN, reqId, []byte(reqStr))
if err != nil {
return
}
}
rec := &record{}
var err1 error
// recive untill EOF or FCGI_END_REQUEST
for {
err1 = rec.read(client.rwc)
if err1 != nil {
if err1 != io.EOF {
err = err1
}
break
}
switch {
case rec.h.Type == FCGI_STDOUT:
retout = append(retout, rec.content()...)
case rec.h.Type == FCGI_STDERR:
reterr = append(reterr, rec.content()...)
case rec.h.Type == FCGI_END_REQUEST:
fallthrough
default:
break
}
}
return
}

85
plugins/phpfpm/phpfpm_test.go Normal file
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@ -0,0 +1,85 @@
package phpfpm
import (
"fmt"
"testing"
"github.com/influxdb/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"net/http"
"net/http/httptest"
)
func TestPhpFpmGeneratesMetrics(t *testing.T) {
//We create a fake server to return test data
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, outputSample)
}))
defer ts.Close()
//Now we tested again above server, with our authentication data
r := &phpfpm{
Urls: []string{ts.URL},
}
var acc testutil.Accumulator
err := r.Gather(&acc)
require.NoError(t, err)
tags := map[string]string{
"url": ts.Listener.Addr().String(),
"pool": "www",
}
assert.NoError(t, acc.ValidateTaggedValue("accepted_conn", int64(3), tags))
checkInt := []struct {
name string
value int64
}{
{"accepted_conn", 3},
{"listen_queue", 1},
{"max_listen_queue", 0},
{"listen_queue_len", 0},
{"idle_processes", 1},
{"active_processes", 1},
{"total_processes", 2},
{"max_active_processes", 1},
{"max_children_reached", 2},
{"slow_requests", 1},
}
for _, c := range checkInt {
assert.Equal(t, true, acc.CheckValue(c.name, c.value))
}
}
//When not passing server config, we default to localhost
//We just want to make sure we did request stat from localhost
func TestHaproxyDefaultGetFromLocalhost(t *testing.T) {
r := &phpfpm{}
var acc testutil.Accumulator
err := r.Gather(&acc)
require.Error(t, err)
assert.Contains(t, err.Error(), "127.0.0.1/status")
}
const outputSample = `
pool: www
process manager: dynamic
start time: 11/Oct/2015:23:38:51 +0000
start since: 1991
accepted conn: 3
listen queue: 1
max listen queue: 0
listen queue len: 0
idle processes: 1
active processes: 1
total processes: 2
max active processes: 1
max children reached: 2
slow requests: 1
`