prober nginx 采集插件 (#557)

* add a method to get the Endpoint

* 增加nginx插件，修改control。支持./control build prober job这种多个参数

* 修改提示

Co-authored-by: lynxcat <lynxcatdeng@gmail.com>

control

@@ -228,30 +228,49 @@ pack()
 	rm -rf ~/n9e.bak.$clock
 }
 
+exec()
+{
+
+  params=${@:2}
+
+  if [ ${#2} -gt 0 ]; then
+    for param in $params
+    do
+      $1 $param
+      if [ "x${mod}" = "xall" ]; then
+        break
+      fi
+    done
+  else
+  echo $1
+    $1
+  fi
+}
+
 case "$1" in
 	start)
-		start $2
+		exec start ${@:2}
 		;;
 	stop)
-		stop $2
+		exec stop ${@:2}
 		;;
 	restart)
-		restart $2
+		exec restart ${@:2}
 		;;
 	status)
 		status
 		;;
 	build)
-		build $2
+		exec build ${@:2}
 		;;
 	build_local)
-		build_local $2
+		exec build_local ${@:2}
 		;;
 	reload)
-		reload $2
+		exec reload ${@:2}
 		;;
 	pack)
-		pack $2
+		exec pack ${@:2}
 		;;
 	*)
 		usage

etc/plugins/nginx.yml

@@ -0,0 +1,9 @@
+mode: whitelist # whitelist(default),all
+metrics:
+  - name: nginx_accepts 
+  - name: nginx_active 
+  - name: nginx_handled 
+  - name: nginx_reading 
+  - name: nginx_requests
+  - name: nginx_waiting
+  - name: nginx_writing 

src/modules/monapi/plugins/all/all.go

@@ -8,6 +8,7 @@ import (
 	_ "github.com/didi/nightingale/src/modules/monapi/plugins/mongodb"
 	_ "github.com/didi/nightingale/src/modules/monapi/plugins/mysql"
 	_ "github.com/didi/nightingale/src/modules/monapi/plugins/redis"
+	_ "github.com/didi/nightingale/src/modules/monapi/plugins/nginx"
 
 	// local
 	_ "github.com/didi/nightingale/src/modules/monapi/plugins/log"

src/modules/monapi/plugins/nginx/nginx.go

@@ -0,0 +1,55 @@
+package nginx
+
+import (
+	"fmt"
+	"github.com/didi/nightingale/src/modules/monapi/collector"
+	"github.com/didi/nightingale/src/toolkits/i18n"
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/inputs/nginx"
+)
+
+func init() {
+	collector.CollectorRegister(NewCollector()) // for monapi
+	i18n.DictRegister(langDict)
+}
+
+type Collector struct {
+	*collector.BaseCollector
+}
+
+func NewCollector() *Collector {
+	return &Collector{BaseCollector: collector.NewBaseCollector(
+		"nginx",
+		collector.RemoteCategory,
+		func() collector.TelegrafPlugin { return &Rule{} },
+	)}
+}
+
+var (
+	langDict = map[string]map[string]string{
+		"zh": map[string]string{
+			"nginx status uri": "查看Nginx状态的地址",
+		},
+	}
+)
+
+type Rule struct {
+	Urls []string `label:"nginx status uri" json:"url,required" example:"http://localhost/status"`
+}
+
+func (p *Rule) Validate() error {
+	if len(p.Urls) == 0 || p.Urls[0] == "" {
+		return fmt.Errorf("ningx.rule.urls must be set")
+	}
+
+	return nil
+}
+
+func (p *Rule) TelegrafInput() (telegraf.Input, error) {
+	if err := p.Validate(); err != nil {
+		return nil, err
+	}
+	return &nginx.Nginx{
+		Urls: p.Urls,
+	}, nil
+}

vendor/github.com/alecthomas/units/COPYING

@@ -0,0 +1,19 @@
+Copyright (C) 2014 Alec Thomas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/alecthomas/units/README.md

@@ -0,0 +1,11 @@
+# Units - Helpful unit multipliers and functions for Go
+
+The goal of this package is to have functionality similar to the [time](http://golang.org/pkg/time/) package.
+
+It allows for code like this:
+
+```go
+n, err := ParseBase2Bytes("1KB")
+// n == 1024
+n = units.Mebibyte * 512
+```

vendor/github.com/alecthomas/units/bytes.go

@@ -0,0 +1,85 @@
+package units
+
+// Base2Bytes is the old non-SI power-of-2 byte scale (1024 bytes in a kilobyte,
+// etc.).
+type Base2Bytes int64
+
+// Base-2 byte units.
+const (
+	Kibibyte Base2Bytes = 1024
+	KiB                 = Kibibyte
+	Mebibyte            = Kibibyte * 1024
+	MiB                 = Mebibyte
+	Gibibyte            = Mebibyte * 1024
+	GiB                 = Gibibyte
+	Tebibyte            = Gibibyte * 1024
+	TiB                 = Tebibyte
+	Pebibyte            = Tebibyte * 1024
+	PiB                 = Pebibyte
+	Exbibyte            = Pebibyte * 1024
+	EiB                 = Exbibyte
+)
+
+var (
+	bytesUnitMap    = MakeUnitMap("iB", "B", 1024)
+	oldBytesUnitMap = MakeUnitMap("B", "B", 1024)
+)
+
+// ParseBase2Bytes supports both iB and B in base-2 multipliers. That is, KB
+// and KiB are both 1024.
+// However "kB", which is the correct SI spelling of 1000 Bytes, is rejected.
+func ParseBase2Bytes(s string) (Base2Bytes, error) {
+	n, err := ParseUnit(s, bytesUnitMap)
+	if err != nil {
+		n, err = ParseUnit(s, oldBytesUnitMap)
+	}
+	return Base2Bytes(n), err
+}
+
+func (b Base2Bytes) String() string {
+	return ToString(int64(b), 1024, "iB", "B")
+}
+
+var (
+	metricBytesUnitMap = MakeUnitMap("B", "B", 1000)
+)
+
+// MetricBytes are SI byte units (1000 bytes in a kilobyte).
+type MetricBytes SI
+
+// SI base-10 byte units.
+const (
+	Kilobyte MetricBytes = 1000
+	KB                   = Kilobyte
+	Megabyte             = Kilobyte * 1000
+	MB                   = Megabyte
+	Gigabyte             = Megabyte * 1000
+	GB                   = Gigabyte
+	Terabyte             = Gigabyte * 1000
+	TB                   = Terabyte
+	Petabyte             = Terabyte * 1000
+	PB                   = Petabyte
+	Exabyte              = Petabyte * 1000
+	EB                   = Exabyte
+)
+
+// ParseMetricBytes parses base-10 metric byte units. That is, KB is 1000 bytes.
+func ParseMetricBytes(s string) (MetricBytes, error) {
+	n, err := ParseUnit(s, metricBytesUnitMap)
+	return MetricBytes(n), err
+}
+
+// TODO: represents 1000B as uppercase "KB", while SI standard requires "kB".
+func (m MetricBytes) String() string {
+	return ToString(int64(m), 1000, "B", "B")
+}
+
+// ParseStrictBytes supports both iB and B suffixes for base 2 and metric,
+// respectively. That is, KiB represents 1024 and kB, KB represent 1000.
+func ParseStrictBytes(s string) (int64, error) {
+	n, err := ParseUnit(s, bytesUnitMap)
+	if err != nil {
+		n, err = ParseUnit(s, metricBytesUnitMap)
+	}
+	return int64(n), err
+}

vendor/github.com/alecthomas/units/doc.go

@@ -0,0 +1,13 @@
+// Package units provides helpful unit multipliers and functions for Go.
+//
+// The goal of this package is to have functionality similar to the time [1] package.
+//
+//
+// [1] http://golang.org/pkg/time/
+//
+// It allows for code like this:
+//
+//     n, err := ParseBase2Bytes("1KB")
+//     // n == 1024
+//     n = units.Mebibyte * 512
+package units

vendor/github.com/alecthomas/units/go.mod

@@ -0,0 +1,3 @@
+module github.com/alecthomas/units
+
+require github.com/stretchr/testify v1.4.0

vendor/github.com/alecthomas/units/go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/alecthomas/units/si.go

@@ -0,0 +1,50 @@
+package units
+
+// SI units.
+type SI int64
+
+// SI unit multiples.
+const (
+	Kilo SI = 1000
+	Mega    = Kilo * 1000
+	Giga    = Mega * 1000
+	Tera    = Giga * 1000
+	Peta    = Tera * 1000
+	Exa     = Peta * 1000
+)
+
+func MakeUnitMap(suffix, shortSuffix string, scale int64) map[string]float64 {
+	res := map[string]float64{
+		shortSuffix: 1,
+		// see below for "k" / "K"
+		"M" + suffix: float64(scale * scale),
+		"G" + suffix: float64(scale * scale * scale),
+		"T" + suffix: float64(scale * scale * scale * scale),
+		"P" + suffix: float64(scale * scale * scale * scale * scale),
+		"E" + suffix: float64(scale * scale * scale * scale * scale * scale),
+	}
+
+	// Standard SI prefixes use lowercase "k" for kilo = 1000.
+	// For compatibility, and to be fool-proof, we accept both "k" and "K" in metric mode.
+	//
+	// However, official binary prefixes are always capitalized - "KiB" -
+	// and we specifically never parse "kB" as 1024B because:
+	//
+	// (1) people pedantic enough to use lowercase according to SI unlikely to abuse "k" to mean 1024 :-)
+	//
+	// (2) Use of capital K for 1024 was an informal tradition predating IEC prefixes:
+	//     "The binary meaning of the kilobyte for 1024 bytes typically uses the symbol KB, with an
+	//     uppercase letter K."
+	//     -- https://en.wikipedia.org/wiki/Kilobyte#Base_2_(1024_bytes)
+	//     "Capitalization of the letter K became the de facto standard for binary notation, although this
+	//     could not be extended to higher powers, and use of the lowercase k did persist.[13][14][15]"
+	//     -- https://en.wikipedia.org/wiki/Binary_prefix#History
+	//     See also the extensive https://en.wikipedia.org/wiki/Timeline_of_binary_prefixes.
+	if scale == 1024 {
+		res["K"+suffix] = float64(scale)
+	} else {
+		res["k"+suffix] = float64(scale)
+		res["K"+suffix] = float64(scale)
+	}
+	return res
+}

vendor/github.com/alecthomas/units/util.go

@@ -0,0 +1,138 @@
+package units
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+var (
+	siUnits = []string{"", "K", "M", "G", "T", "P", "E"}
+)
+
+func ToString(n int64, scale int64, suffix, baseSuffix string) string {
+	mn := len(siUnits)
+	out := make([]string, mn)
+	for i, m := range siUnits {
+		if n%scale != 0 || i == 0 && n == 0 {
+			s := suffix
+			if i == 0 {
+				s = baseSuffix
+			}
+			out[mn-1-i] = fmt.Sprintf("%d%s%s", n%scale, m, s)
+		}
+		n /= scale
+		if n == 0 {
+			break
+		}
+	}
+	return strings.Join(out, "")
+}
+
+// Below code ripped straight from http://golang.org/src/pkg/time/format.go?s=33392:33438#L1123
+var errLeadingInt = errors.New("units: bad [0-9]*") // never printed
+
+// leadingInt consumes the leading [0-9]* from s.
+func leadingInt(s string) (x int64, rem string, err error) {
+	i := 0
+	for ; i < len(s); i++ {
+		c := s[i]
+		if c < '0' || c > '9' {
+			break
+		}
+		if x >= (1<<63-10)/10 {
+			// overflow
+			return 0, "", errLeadingInt
+		}
+		x = x*10 + int64(c) - '0'
+	}
+	return x, s[i:], nil
+}
+
+func ParseUnit(s string, unitMap map[string]float64) (int64, error) {
+	// [-+]?([0-9]*(\.[0-9]*)?[a-z]+)+
+	orig := s
+	f := float64(0)
+	neg := false
+
+	// Consume [-+]?
+	if s != "" {
+		c := s[0]
+		if c == '-' || c == '+' {
+			neg = c == '-'
+			s = s[1:]
+		}
+	}
+	// Special case: if all that is left is "0", this is zero.
+	if s == "0" {
+		return 0, nil
+	}
+	if s == "" {
+		return 0, errors.New("units: invalid " + orig)
+	}
+	for s != "" {
+		g := float64(0) // this element of the sequence
+
+		var x int64
+		var err error
+
+		// The next character must be [0-9.]
+		if !(s[0] == '.' || ('0' <= s[0] && s[0] <= '9')) {
+			return 0, errors.New("units: invalid " + orig)
+		}
+		// Consume [0-9]*
+		pl := len(s)
+		x, s, err = leadingInt(s)
+		if err != nil {
+			return 0, errors.New("units: invalid " + orig)
+		}
+		g = float64(x)
+		pre := pl != len(s) // whether we consumed anything before a period
+
+		// Consume (\.[0-9]*)?
+		post := false
+		if s != "" && s[0] == '.' {
+			s = s[1:]
+			pl := len(s)
+			x, s, err = leadingInt(s)
+			if err != nil {
+				return 0, errors.New("units: invalid " + orig)
+			}
+			scale := 1.0
+			for n := pl - len(s); n > 0; n-- {
+				scale *= 10
+			}
+			g += float64(x) / scale
+			post = pl != len(s)
+		}
+		if !pre && !post {
+			// no digits (e.g. ".s" or "-.s")
+			return 0, errors.New("units: invalid " + orig)
+		}
+
+		// Consume unit.
+		i := 0
+		for ; i < len(s); i++ {
+			c := s[i]
+			if c == '.' || ('0' <= c && c <= '9') {
+				break
+			}
+		}
+		u := s[:i]
+		s = s[i:]
+		unit, ok := unitMap[u]
+		if !ok {
+			return 0, errors.New("units: unknown unit " + u + " in " + orig)
+		}
+
+		f += g * unit
+	}
+
+	if neg {
+		f = -f
+	}
+	if f < float64(-1<<63) || f > float64(1<<63-1) {
+		return 0, errors.New("units: overflow parsing unit")
+	}
+	return int64(f), nil
+}

vendor/github.com/influxdata/telegraf/internal/content_coding.go

@@ -0,0 +1,182 @@
+package internal
+
+import (
+	"bufio"
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"io"
+)
+
+// NewStreamContentDecoder returns a reader that will decode the stream
+// according to the encoding type.
+func NewStreamContentDecoder(encoding string, r io.Reader) (io.Reader, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipReader(r)
+	case "identity", "":
+		return r, nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// GzipReader is similar to gzip.Reader but reads only a single gzip stream per read.
+type GzipReader struct {
+	r           io.Reader
+	z           *gzip.Reader
+	endOfStream bool
+}
+
+func NewGzipReader(r io.Reader) (io.Reader, error) {
+	// We need a read that implements ByteReader in order to line up the next
+	// stream.
+	br := bufio.NewReader(r)
+
+	// Reads the first gzip stream header.
+	z, err := gzip.NewReader(br)
+	if err != nil {
+		return nil, err
+	}
+
+	// Prevent future calls to Read from reading the following gzip header.
+	z.Multistream(false)
+
+	return &GzipReader{r: br, z: z}, nil
+}
+
+func (r *GzipReader) Read(b []byte) (int, error) {
+	if r.endOfStream {
+		// Reads the next gzip header and prepares for the next stream.
+		err := r.z.Reset(r.r)
+		if err != nil {
+			return 0, err
+		}
+		r.z.Multistream(false)
+		r.endOfStream = false
+	}
+
+	n, err := r.z.Read(b)
+
+	// Since multistream is disabled, io.EOF indicates the end of the gzip
+	// sequence.  On the next read we must read the next gzip header.
+	if err == io.EOF {
+		r.endOfStream = true
+		return n, nil
+	}
+	return n, err
+
+}
+
+// NewContentEncoder returns a ContentEncoder for the encoding type.
+func NewContentEncoder(encoding string) (ContentEncoder, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipEncoder()
+	case "identity", "":
+		return NewIdentityEncoder(), nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// NewContentDecoder returns a ContentDecoder for the encoding type.
+func NewContentDecoder(encoding string) (ContentDecoder, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipDecoder()
+	case "identity", "":
+		return NewIdentityDecoder(), nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// ContentEncoder applies a wrapper encoding to byte buffers.
+type ContentEncoder interface {
+	Encode([]byte) ([]byte, error)
+}
+
+// GzipEncoder compresses the buffer using gzip at the default level.
+type GzipEncoder struct {
+	writer *gzip.Writer
+	buf    *bytes.Buffer
+}
+
+func NewGzipEncoder() (*GzipEncoder, error) {
+	var buf bytes.Buffer
+	return &GzipEncoder{
+		writer: gzip.NewWriter(&buf),
+		buf:    &buf,
+	}, nil
+}
+
+func (e *GzipEncoder) Encode(data []byte) ([]byte, error) {
+	e.buf.Reset()
+	e.writer.Reset(e.buf)
+
+	_, err := e.writer.Write(data)
+	if err != nil {
+		return nil, err
+	}
+	err = e.writer.Close()
+	if err != nil {
+		return nil, err
+	}
+	return e.buf.Bytes(), nil
+}
+
+// IdentityEncoder is a null encoder that applies no transformation.
+type IdentityEncoder struct{}
+
+func NewIdentityEncoder() *IdentityEncoder {
+	return &IdentityEncoder{}
+}
+
+func (*IdentityEncoder) Encode(data []byte) ([]byte, error) {
+	return data, nil
+}
+
+// ContentDecoder removes a wrapper encoding from byte buffers.
+type ContentDecoder interface {
+	Decode([]byte) ([]byte, error)
+}
+
+// GzipDecoder decompresses buffers with gzip compression.
+type GzipDecoder struct {
+	reader *gzip.Reader
+	buf    *bytes.Buffer
+}
+
+func NewGzipDecoder() (*GzipDecoder, error) {
+	return &GzipDecoder{
+		reader: new(gzip.Reader),
+		buf:    new(bytes.Buffer),
+	}, nil
+}
+
+func (d *GzipDecoder) Decode(data []byte) ([]byte, error) {
+	d.reader.Reset(bytes.NewBuffer(data))
+	d.buf.Reset()
+
+	_, err := d.buf.ReadFrom(d.reader)
+	if err != nil && err != io.EOF {
+		return nil, err
+	}
+	err = d.reader.Close()
+	if err != nil {
+		return nil, err
+	}
+	return d.buf.Bytes(), nil
+}
+
+// IdentityDecoder is a null decoder that returns the input.
+type IdentityDecoder struct{}
+
+func NewIdentityDecoder() *IdentityDecoder {
+	return &IdentityDecoder{}
+}
+
+func (*IdentityDecoder) Decode(data []byte) ([]byte, error) {
+	return data, nil
+}

vendor/github.com/influxdata/telegraf/internal/exec.go

@@ -0,0 +1,44 @@
+package internal
+
+import (
+	"bytes"
+	"os/exec"
+	"time"
+)
+
+// CombinedOutputTimeout runs the given command with the given timeout and
+// returns the combined output of stdout and stderr.
+// If the command times out, it attempts to kill the process.
+func CombinedOutputTimeout(c *exec.Cmd, timeout time.Duration) ([]byte, error) {
+	var b bytes.Buffer
+	c.Stdout = &b
+	c.Stderr = &b
+	if err := c.Start(); err != nil {
+		return nil, err
+	}
+	err := WaitTimeout(c, timeout)
+	return b.Bytes(), err
+}
+
+// StdOutputTimeout runs the given command with the given timeout and
+// returns the output of stdout.
+// If the command times out, it attempts to kill the process.
+func StdOutputTimeout(c *exec.Cmd, timeout time.Duration) ([]byte, error) {
+	var b bytes.Buffer
+	c.Stdout = &b
+	c.Stderr = nil
+	if err := c.Start(); err != nil {
+		return nil, err
+	}
+	err := WaitTimeout(c, timeout)
+	return b.Bytes(), err
+}
+
+// RunTimeout runs the given command with the given timeout.
+// If the command times out, it attempts to kill the process.
+func RunTimeout(c *exec.Cmd, timeout time.Duration) error {
+	if err := c.Start(); err != nil {
+		return err
+	}
+	return WaitTimeout(c, timeout)
+}

vendor/github.com/influxdata/telegraf/internal/exec_unix.go

@@ -0,0 +1,58 @@
+// +build !windows
+
+package internal
+
+import (
+	"log"
+	"os/exec"
+	"syscall"
+	"time"
+)
+
+// KillGrace is the amount of time we allow a process to shutdown before
+// sending a SIGKILL.
+const KillGrace = 5 * time.Second
+
+// WaitTimeout waits for the given command to finish with a timeout.
+// It assumes the command has already been started.
+// If the command times out, it attempts to kill the process.
+func WaitTimeout(c *exec.Cmd, timeout time.Duration) error {
+	var kill *time.Timer
+	term := time.AfterFunc(timeout, func() {
+		err := c.Process.Signal(syscall.SIGTERM)
+		if err != nil {
+			log.Printf("E! [agent] Error terminating process: %s", err)
+			return
+		}
+
+		kill = time.AfterFunc(KillGrace, func() {
+			err := c.Process.Kill()
+			if err != nil {
+				log.Printf("E! [agent] Error killing process: %s", err)
+				return
+			}
+		})
+	})
+
+	err := c.Wait()
+
+	// Shutdown all timers
+	if kill != nil {
+		kill.Stop()
+	}
+	termSent := !term.Stop()
+
+	// If the process exited without error treat it as success.  This allows a
+	// process to do a clean shutdown on signal.
+	if err == nil {
+		return nil
+	}
+
+	// If SIGTERM was sent then treat any process error as a timeout.
+	if termSent {
+		return TimeoutErr
+	}
+
+	// Otherwise there was an error unrelated to termination.
+	return err
+}

vendor/github.com/influxdata/telegraf/internal/exec_windows.go

@@ -0,0 +1,41 @@
+// +build windows
+
+package internal
+
+import (
+	"log"
+	"os/exec"
+	"time"
+)
+
+// WaitTimeout waits for the given command to finish with a timeout.
+// It assumes the command has already been started.
+// If the command times out, it attempts to kill the process.
+func WaitTimeout(c *exec.Cmd, timeout time.Duration) error {
+	timer := time.AfterFunc(timeout, func() {
+		err := c.Process.Kill()
+		if err != nil {
+			log.Printf("E! [agent] Error killing process: %s", err)
+			return
+		}
+	})
+
+	err := c.Wait()
+
+	// Shutdown all timers
+	termSent := !timer.Stop()
+
+	// If the process exited without error treat it as success.  This allows a
+	// process to do a clean shutdown on signal.
+	if err == nil {
+		return nil
+	}
+
+	// If SIGTERM was sent then treat any process error as a timeout.
+	if termSent {
+		return TimeoutErr
+	}
+
+	// Otherwise there was an error unrelated to termination.
+	return err
+}

vendor/github.com/influxdata/telegraf/internal/http.go

@@ -0,0 +1,143 @@
+package internal
+
+import (
+	"crypto/subtle"
+	"net"
+	"net/http"
+	"net/url"
+)
+
+type BasicAuthErrorFunc func(rw http.ResponseWriter)
+
+// AuthHandler returns a http handler that requires HTTP basic auth
+// credentials to match the given username and password.
+func AuthHandler(username, password, realm string, onError BasicAuthErrorFunc) func(h http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &basicAuthHandler{
+			username: username,
+			password: password,
+			realm:    realm,
+			onError:  onError,
+			next:     h,
+		}
+	}
+}
+
+type basicAuthHandler struct {
+	username string
+	password string
+	realm    string
+	onError  BasicAuthErrorFunc
+	next     http.Handler
+}
+
+func (h *basicAuthHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if h.username != "" || h.password != "" {
+		reqUsername, reqPassword, ok := req.BasicAuth()
+		if !ok ||
+			subtle.ConstantTimeCompare([]byte(reqUsername), []byte(h.username)) != 1 ||
+			subtle.ConstantTimeCompare([]byte(reqPassword), []byte(h.password)) != 1 {
+
+			rw.Header().Set("WWW-Authenticate", "Basic realm=\""+h.realm+"\"")
+			h.onError(rw)
+			http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+			return
+		}
+	}
+
+	h.next.ServeHTTP(rw, req)
+}
+
+type GenericAuthErrorFunc func(rw http.ResponseWriter)
+
+// GenericAuthHandler returns a http handler that requires `Authorization: <credentials>`
+func GenericAuthHandler(credentials string, onError GenericAuthErrorFunc) func(h http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &genericAuthHandler{
+			credentials: credentials,
+			onError:     onError,
+			next:        h,
+		}
+	}
+}
+
+// Generic auth scheme handler - exact match on `Authorization: <credentials>`
+type genericAuthHandler struct {
+	credentials string
+	onError     GenericAuthErrorFunc
+	next        http.Handler
+}
+
+func (h *genericAuthHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if h.credentials != "" {
+		// Scheme checking
+		authorization := req.Header.Get("Authorization")
+		if subtle.ConstantTimeCompare([]byte(authorization), []byte(h.credentials)) != 1 {
+
+			h.onError(rw)
+			http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+			return
+		}
+	}
+
+	h.next.ServeHTTP(rw, req)
+}
+
+// ErrorFunc is a callback for writing an error response.
+type ErrorFunc func(rw http.ResponseWriter, code int)
+
+// IPRangeHandler returns a http handler that requires the remote address to be
+// in the specified network.
+func IPRangeHandler(network []*net.IPNet, onError ErrorFunc) func(h http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &ipRangeHandler{
+			network: network,
+			onError: onError,
+			next:    h,
+		}
+	}
+}
+
+type ipRangeHandler struct {
+	network []*net.IPNet
+	onError ErrorFunc
+	next    http.Handler
+}
+
+func (h *ipRangeHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if len(h.network) == 0 {
+		h.next.ServeHTTP(rw, req)
+		return
+	}
+
+	remoteIPString, _, err := net.SplitHostPort(req.RemoteAddr)
+	if err != nil {
+		h.onError(rw, http.StatusForbidden)
+		return
+	}
+
+	remoteIP := net.ParseIP(remoteIPString)
+	if remoteIP == nil {
+		h.onError(rw, http.StatusForbidden)
+		return
+	}
+
+	for _, net := range h.network {
+		if net.Contains(remoteIP) {
+			h.next.ServeHTTP(rw, req)
+			return
+		}
+	}
+
+	h.onError(rw, http.StatusForbidden)
+}
+
+func OnClientError(client *http.Client, err error) {
+	// Close connection after a timeout error. If this is a HTTP2
+	// connection this ensures that next interval a new connection will be
+	// used and name lookup will be performed.
+	//   https://github.com/golang/go/issues/36026
+	if err, ok := err.(*url.Error); ok && err.Timeout() {
+		client.CloseIdleConnections()
+	}
+}

vendor/github.com/influxdata/telegraf/internal/internal.go

@@ -0,0 +1,424 @@
+package internal
+
+import (
+	"bufio"
+	"bytes"
+	"compress/gzip"
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"math/rand"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+	"unicode"
+
+	"github.com/alecthomas/units"
+)
+
+const alphanum string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+
+var (
+	TimeoutErr = errors.New("Command timed out.")
+
+	NotImplementedError = errors.New("not implemented yet")
+
+	VersionAlreadySetError = errors.New("version has already been set")
+)
+
+// Set via the main module
+var version string
+
+// Duration just wraps time.Duration
+type Duration struct {
+	Duration time.Duration
+}
+
+// Size just wraps an int64
+type Size struct {
+	Size int64
+}
+
+type Number struct {
+	Value float64
+}
+
+type ReadWaitCloser struct {
+	pipeReader *io.PipeReader
+	wg         sync.WaitGroup
+}
+
+// SetVersion sets the telegraf agent version
+func SetVersion(v string) error {
+	if version != "" {
+		return VersionAlreadySetError
+	}
+	version = v
+	return nil
+}
+
+// Version returns the telegraf agent version
+func Version() string {
+	return version
+}
+
+// ProductToken returns a tag for Telegraf that can be used in user agents.
+func ProductToken() string {
+	return fmt.Sprintf("Telegraf/%s Go/%s",
+		Version(), strings.TrimPrefix(runtime.Version(), "go"))
+}
+
+// UnmarshalTOML parses the duration from the TOML config file
+func (d *Duration) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	// see if we can directly convert it
+	d.Duration, err = time.ParseDuration(string(b))
+	if err == nil {
+		return nil
+	}
+
+	// Parse string duration, ie, "1s"
+	if uq, err := strconv.Unquote(string(b)); err == nil && len(uq) > 0 {
+		d.Duration, err = time.ParseDuration(uq)
+		if err == nil {
+			return nil
+		}
+	}
+
+	// First try parsing as integer seconds
+	sI, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sI)
+		return nil
+	}
+	// Second try parsing as float seconds
+	sF, err := strconv.ParseFloat(string(b), 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sF)
+		return nil
+	}
+
+	return nil
+}
+
+func (s *Size) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	val, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		s.Size = val
+		return nil
+	}
+	uq, err := strconv.Unquote(string(b))
+	if err != nil {
+		return err
+	}
+	val, err = units.ParseStrictBytes(uq)
+	if err != nil {
+		return err
+	}
+	s.Size = val
+	return nil
+}
+
+func (n *Number) UnmarshalTOML(b []byte) error {
+	value, err := strconv.ParseFloat(string(b), 64)
+	if err != nil {
+		return err
+	}
+
+	n.Value = value
+	return nil
+}
+
+// ReadLines reads contents from a file and splits them by new lines.
+// A convenience wrapper to ReadLinesOffsetN(filename, 0, -1).
+func ReadLines(filename string) ([]string, error) {
+	return ReadLinesOffsetN(filename, 0, -1)
+}
+
+// ReadLines reads contents from file and splits them by new line.
+// The offset tells at which line number to start.
+// The count determines the number of lines to read (starting from offset):
+//   n >= 0: at most n lines
+//   n < 0: whole file
+func ReadLinesOffsetN(filename string, offset uint, n int) ([]string, error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return []string{""}, err
+	}
+	defer f.Close()
+
+	var ret []string
+
+	r := bufio.NewReader(f)
+	for i := 0; i < n+int(offset) || n < 0; i++ {
+		line, err := r.ReadString('\n')
+		if err != nil {
+			break
+		}
+		if i < int(offset) {
+			continue
+		}
+		ret = append(ret, strings.Trim(line, "\n"))
+	}
+
+	return ret, nil
+}
+
+// RandomString returns a random string of alpha-numeric characters
+func RandomString(n int) string {
+	var bytes = make([]byte, n)
+	rand.Read(bytes)
+	for i, b := range bytes {
+		bytes[i] = alphanum[b%byte(len(alphanum))]
+	}
+	return string(bytes)
+}
+
+// SnakeCase converts the given string to snake case following the Golang format:
+// acronyms are converted to lower-case and preceded by an underscore.
+func SnakeCase(in string) string {
+	runes := []rune(in)
+	length := len(runes)
+
+	var out []rune
+	for i := 0; i < length; i++ {
+		if i > 0 && unicode.IsUpper(runes[i]) && ((i+1 < length && unicode.IsLower(runes[i+1])) || unicode.IsLower(runes[i-1])) {
+			out = append(out, '_')
+		}
+		out = append(out, unicode.ToLower(runes[i]))
+	}
+
+	return string(out)
+}
+
+// RandomSleep will sleep for a random amount of time up to max.
+// If the shutdown channel is closed, it will return before it has finished
+// sleeping.
+func RandomSleep(max time.Duration, shutdown chan struct{}) {
+	if max == 0 {
+		return
+	}
+
+	sleepns := rand.Int63n(max.Nanoseconds())
+
+	t := time.NewTimer(time.Nanosecond * time.Duration(sleepns))
+	select {
+	case <-t.C:
+		return
+	case <-shutdown:
+		t.Stop()
+		return
+	}
+}
+
+// RandomDuration returns a random duration between 0 and max.
+func RandomDuration(max time.Duration) time.Duration {
+	if max == 0 {
+		return 0
+	}
+
+	sleepns := rand.Int63n(max.Nanoseconds())
+
+	return time.Duration(sleepns)
+}
+
+// SleepContext sleeps until the context is closed or the duration is reached.
+func SleepContext(ctx context.Context, duration time.Duration) error {
+	if duration == 0 {
+		return nil
+	}
+
+	t := time.NewTimer(duration)
+	select {
+	case <-t.C:
+		return nil
+	case <-ctx.Done():
+		t.Stop()
+		return ctx.Err()
+	}
+}
+
+// AlignDuration returns the duration until next aligned interval.
+// If the current time is aligned a 0 duration is returned.
+func AlignDuration(tm time.Time, interval time.Duration) time.Duration {
+	return AlignTime(tm, interval).Sub(tm)
+}
+
+// AlignTime returns the time of the next aligned interval.
+// If the current time is aligned the current time is returned.
+func AlignTime(tm time.Time, interval time.Duration) time.Time {
+	truncated := tm.Truncate(interval)
+	if truncated == tm {
+		return tm
+	}
+	return truncated.Add(interval)
+}
+
+// Exit status takes the error from exec.Command
+// and returns the exit status and true
+// if error is not exit status, will return 0 and false
+func ExitStatus(err error) (int, bool) {
+	if exiterr, ok := err.(*exec.ExitError); ok {
+		if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
+			return status.ExitStatus(), true
+		}
+	}
+	return 0, false
+}
+
+func (r *ReadWaitCloser) Close() error {
+	err := r.pipeReader.Close()
+	r.wg.Wait() // wait for the gzip goroutine finish
+	return err
+}
+
+// CompressWithGzip takes an io.Reader as input and pipes
+// it through a gzip.Writer returning an io.Reader containing
+// the gzipped data.
+// An error is returned if passing data to the gzip.Writer fails
+func CompressWithGzip(data io.Reader) (io.ReadCloser, error) {
+	pipeReader, pipeWriter := io.Pipe()
+	gzipWriter := gzip.NewWriter(pipeWriter)
+
+	rc := &ReadWaitCloser{
+		pipeReader: pipeReader,
+	}
+
+	rc.wg.Add(1)
+	var err error
+	go func() {
+		_, err = io.Copy(gzipWriter, data)
+		gzipWriter.Close()
+		// subsequent reads from the read half of the pipe will
+		// return no bytes and the error err, or EOF if err is nil.
+		pipeWriter.CloseWithError(err)
+		rc.wg.Done()
+	}()
+
+	return pipeReader, err
+}
+
+// ParseTimestamp parses a Time according to the standard Telegraf options.
+// These are generally displayed in the toml similar to:
+//   json_time_key= "timestamp"
+//   json_time_format = "2006-01-02T15:04:05Z07:00"
+//   json_timezone = "America/Los_Angeles"
+//
+// The format can be one of "unix", "unix_ms", "unix_us", "unix_ns", or a Go
+// time layout suitable for time.Parse.
+//
+// When using the "unix" format, a optional fractional component is allowed.
+// Specific unix time precisions cannot have a fractional component.
+//
+// Unix times may be an int64, float64, or string.  When using a Go format
+// string the timestamp must be a string.
+//
+// The location is a location string suitable for time.LoadLocation.  Unix
+// times do not use the location string, a unix time is always return in the
+// UTC location.
+func ParseTimestamp(format string, timestamp interface{}, location string) (time.Time, error) {
+	switch format {
+	case "unix", "unix_ms", "unix_us", "unix_ns":
+		return parseUnix(format, timestamp)
+	default:
+		if location == "" {
+			location = "UTC"
+		}
+		return parseTime(format, timestamp, location)
+	}
+}
+
+func parseUnix(format string, timestamp interface{}) (time.Time, error) {
+	integer, fractional, err := parseComponents(timestamp)
+	if err != nil {
+		return time.Unix(0, 0), err
+	}
+
+	switch strings.ToLower(format) {
+	case "unix":
+		return time.Unix(integer, fractional).UTC(), nil
+	case "unix_ms":
+		return time.Unix(0, integer*1e6).UTC(), nil
+	case "unix_us":
+		return time.Unix(0, integer*1e3).UTC(), nil
+	case "unix_ns":
+		return time.Unix(0, integer).UTC(), nil
+	default:
+		return time.Unix(0, 0), errors.New("unsupported type")
+	}
+}
+
+// Returns the integers before and after an optional decimal point.  Both '.'
+// and ',' are supported for the decimal point.  The timestamp can be an int64,
+// float64, or string.
+//   ex: "42.5" -> (42, 5, nil)
+func parseComponents(timestamp interface{}) (int64, int64, error) {
+	switch ts := timestamp.(type) {
+	case string:
+		parts := strings.SplitN(ts, ".", 2)
+		if len(parts) == 2 {
+			return parseUnixTimeComponents(parts[0], parts[1])
+		}
+
+		parts = strings.SplitN(ts, ",", 2)
+		if len(parts) == 2 {
+			return parseUnixTimeComponents(parts[0], parts[1])
+		}
+
+		integer, err := strconv.ParseInt(ts, 10, 64)
+		if err != nil {
+			return 0, 0, err
+		}
+		return integer, 0, nil
+	case int64:
+		return ts, 0, nil
+	case float64:
+		integer, fractional := math.Modf(ts)
+		return int64(integer), int64(fractional * 1e9), nil
+	default:
+		return 0, 0, errors.New("unsupported type")
+	}
+}
+
+func parseUnixTimeComponents(first, second string) (int64, int64, error) {
+	integer, err := strconv.ParseInt(first, 10, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	// Convert to nanoseconds, dropping any greater precision.
+	buf := []byte("000000000")
+	copy(buf, second)
+
+	fractional, err := strconv.ParseInt(string(buf), 10, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+	return integer, fractional, nil
+}
+
+// ParseTime parses a string timestamp according to the format string.
+func parseTime(format string, timestamp interface{}, location string) (time.Time, error) {
+	switch ts := timestamp.(type) {
+	case string:
+		loc, err := time.LoadLocation(location)
+		if err != nil {
+			return time.Unix(0, 0), err
+		}
+		return time.ParseInLocation(format, ts, loc)
+	default:
+		return time.Unix(0, 0), errors.New("unsupported type")
+	}
+}

vendor/github.com/influxdata/telegraf/internal/usage.go

@@ -0,0 +1,61 @@
+// +build !windows
+
+package internal
+
+const Usage = `Telegraf, The plugin-driven server agent for collecting and reporting metrics.
+
+Usage:
+
+  telegraf [commands|flags]
+
+The commands & flags are:
+
+  config              print out full sample configuration to stdout
+  version             print the version to stdout
+
+  --aggregator-filter <filter>   filter the aggregators to enable, separator is :
+  --config <file>                configuration file to load
+  --config-directory <directory> directory containing additional *.conf files
+  --plugin-directory             directory containing *.so files, this directory will be
+                                 searched recursively. Any Plugin found will be loaded
+                                 and namespaced.
+  --debug                        turn on debug logging
+  --input-filter <filter>        filter the inputs to enable, separator is :
+  --input-list                   print available input plugins.
+  --output-filter <filter>       filter the outputs to enable, separator is :
+  --output-list                  print available output plugins.
+  --pidfile <file>               file to write our pid to
+  --pprof-addr <address>         pprof address to listen on, don't activate pprof if empty
+  --processor-filter <filter>    filter the processors to enable, separator is :
+  --quiet                        run in quiet mode
+  --section-filter               filter config sections to output, separator is :
+                                 Valid values are 'agent', 'global_tags', 'outputs',
+                                 'processors', 'aggregators' and 'inputs'
+  --sample-config                print out full sample configuration
+  --once                         enable once mode: gather metrics once, write them, and exit
+  --test                         enable test mode: gather metrics once and print them
+  --test-wait                    wait up to this many seconds for service
+                                 inputs to complete in test or once mode
+  --usage <plugin>               print usage for a plugin, ie, 'telegraf --usage mysql'
+  --version                      display the version and exit
+
+Examples:
+
+  # generate a telegraf config file:
+  telegraf config > telegraf.conf
+
+  # generate config with only cpu input & influxdb output plugins defined
+  telegraf --input-filter cpu --output-filter influxdb config
+
+  # run a single telegraf collection, outputting metrics to stdout
+  telegraf --config telegraf.conf --test
+
+  # run telegraf with all plugins defined in config file
+  telegraf --config telegraf.conf
+
+  # run telegraf, enabling the cpu & memory input, and influxdb output plugins
+  telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
+
+  # run telegraf with pprof
+  telegraf --config telegraf.conf --pprof-addr localhost:6060
+`

vendor/github.com/influxdata/telegraf/internal/usage_windows.go

@@ -0,0 +1,72 @@
+// +build windows
+
+package internal
+
+const Usage = `Telegraf, The plugin-driven server agent for collecting and reporting metrics.
+
+Usage:
+
+  telegraf [commands|flags]
+
+The commands & flags are:
+
+  config              print out full sample configuration to stdout
+  version             print the version to stdout
+
+  --aggregator-filter <filter>   filter the aggregators to enable, separator is :
+  --config <file>                configuration file to load
+  --config-directory <directory> directory containing additional *.conf files
+  --debug                        turn on debug logging
+  --input-filter <filter>        filter the inputs to enable, separator is :
+  --input-list                   print available input plugins.
+  --output-filter <filter>       filter the outputs to enable, separator is :
+  --output-list                  print available output plugins.
+  --pidfile <file>               file to write our pid to
+  --pprof-addr <address>         pprof address to listen on, don't activate pprof if empty
+  --processor-filter <filter>    filter the processors to enable, separator is :
+  --quiet                        run in quiet mode
+  --sample-config                print out full sample configuration
+  --section-filter               filter config sections to output, separator is :
+                                 Valid values are 'agent', 'global_tags', 'outputs',
+                                 'processors', 'aggregators' and 'inputs'
+  --once                         enable once mode: gather metrics once, write them, and exit
+  --test                         enable test mode: gather metrics once and print them
+  --test-wait                    wait up to this many seconds for service
+                                 inputs to complete in test or once mode
+  --usage <plugin>               print usage for a plugin, ie, 'telegraf --usage mysql'
+  --version                      display the version and exit
+
+  --console                      run as console application (windows only)
+  --service <service>            operate on the service (windows only)
+  --service-name                 service name (windows only)
+  --service-display-name         service display name (windows only)
+
+Examples:
+
+  # generate a telegraf config file:
+  telegraf config > telegraf.conf
+
+  # generate config with only cpu input & influxdb output plugins defined
+  telegraf --input-filter cpu --output-filter influxdb config
+
+  # run a single telegraf collection, outputting metrics to stdout
+  telegraf --config telegraf.conf --test
+
+  # run telegraf with all plugins defined in config file
+  telegraf --config telegraf.conf
+
+  # run telegraf, enabling the cpu & memory input, and influxdb output plugins
+  telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
+
+  # run telegraf with pprof
+  telegraf --config telegraf.conf --pprof-addr localhost:6060
+
+  # run telegraf without service controller
+  telegraf --console install --config "C:\Program Files\Telegraf\telegraf.conf"
+
+  # install telegraf service
+  telegraf --service install --config "C:\Program Files\Telegraf\telegraf.conf"
+
+  # install telegraf service with custom name
+  telegraf --service install --service-name=my-telegraf --service-display-name="My Telegraf"
+`

vendor/github.com/influxdata/telegraf/plugins/inputs/nginx/README.md

@@ -0,0 +1,57 @@
+# Nginx Input Plugin
+
+### Configuration:
+
+```toml
+# Read Nginx's basic status information (ngx_http_stub_status_module)
+[[inputs.nginx]]
+  ## An array of Nginx stub_status URI to gather stats.
+  urls = ["http://localhost/server_status"]
+
+  ## Optional TLS Config
+  # tls_ca = "/etc/telegraf/ca.pem"
+  # tls_cert = "/etc/telegraf/cert.pem"
+  # tls_key = "/etc/telegraf/key.pem"
+  ## Use TLS but skip chain & host verification
+  # insecure_skip_verify = false
+
+  ## HTTP response timeout (default: 5s)
+  response_timeout = "5s"
+```
+
+### Measurements & Fields:
+
+- Measurement
+    - accepts
+    - active
+    - handled
+    - reading
+    - requests
+    - waiting
+    - writing
+
+### Tags:
+
+- All measurements have the following tags:
+    - port
+    - server
+
+### Example Output:
+
+Using this configuration:
+```toml
+[[inputs.nginx]]
+  ## An array of Nginx stub_status URI to gather stats.
+  urls = ["http://localhost/status"]
+```
+
+When run with:
+```sh
+./telegraf --config telegraf.conf --input-filter nginx --test
+```
+
+It produces:
+```
+* Plugin: nginx, Collection 1
+> nginx,port=80,server=localhost accepts=605i,active=2i,handled=605i,reading=0i,requests=12132i,waiting=1i,writing=1i 1456690994701784331
+```

vendor/github.com/influxdata/telegraf/plugins/inputs/nginx/nginx.go

@@ -0,0 +1,207 @@
+package nginx
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/plugins/common/tls"
+	"github.com/influxdata/telegraf/plugins/inputs"
+)
+
+type Nginx struct {
+	Urls            []string
+	ResponseTimeout internal.Duration
+	tls.ClientConfig
+
+	// HTTP client
+	client *http.Client
+}
+
+var sampleConfig = `
+  # An array of Nginx stub_status URI to gather stats.
+  urls = ["http://localhost/server_status"]
+
+  ## Optional TLS Config
+  tls_ca = "/etc/telegraf/ca.pem"
+  tls_cert = "/etc/telegraf/cert.cer"
+  tls_key = "/etc/telegraf/key.key"
+  ## Use TLS but skip chain & host verification
+  insecure_skip_verify = false
+
+  # HTTP response timeout (default: 5s)
+  response_timeout = "5s"
+`
+
+func (n *Nginx) SampleConfig() string {
+	return sampleConfig
+}
+
+func (n *Nginx) Description() string {
+	return "Read Nginx's basic status information (ngx_http_stub_status_module)"
+}
+
+func (n *Nginx) Gather(acc telegraf.Accumulator) error {
+	var wg sync.WaitGroup
+
+	// Create an HTTP client that is re-used for each
+	// collection interval
+	if n.client == nil {
+		client, err := n.createHttpClient()
+		if err != nil {
+			return err
+		}
+		n.client = client
+	}
+
+	for _, u := range n.Urls {
+		addr, err := url.Parse(u)
+		if err != nil {
+			acc.AddError(fmt.Errorf("Unable to parse address '%s': %s", u, err))
+			continue
+		}
+
+		wg.Add(1)
+		go func(addr *url.URL) {
+			defer wg.Done()
+			acc.AddError(n.gatherUrl(addr, acc))
+		}(addr)
+	}
+
+	wg.Wait()
+	return nil
+}
+
+func (n *Nginx) createHttpClient() (*http.Client, error) {
+	tlsCfg, err := n.ClientConfig.TLSConfig()
+	if err != nil {
+		return nil, err
+	}
+
+	if n.ResponseTimeout.Duration < time.Second {
+		n.ResponseTimeout.Duration = time.Second * 5
+	}
+
+	client := &http.Client{
+		Transport: &http.Transport{
+			TLSClientConfig: tlsCfg,
+		},
+		Timeout: n.ResponseTimeout.Duration,
+	}
+
+	return client, nil
+}
+
+func (n *Nginx) gatherUrl(addr *url.URL, acc telegraf.Accumulator) error {
+	resp, err := n.client.Get(addr.String())
+	if err != nil {
+		return fmt.Errorf("error making HTTP request to %s: %s", addr.String(), err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("%s returned HTTP status %s", addr.String(), resp.Status)
+	}
+	r := bufio.NewReader(resp.Body)
+
+	// Active connections
+	_, err = r.ReadString(':')
+	if err != nil {
+		return err
+	}
+	line, err := r.ReadString('\n')
+	if err != nil {
+		return err
+	}
+	active, err := strconv.ParseUint(strings.TrimSpace(line), 10, 64)
+	if err != nil {
+		return err
+	}
+
+	// Server accepts handled requests
+	_, err = r.ReadString('\n')
+	if err != nil {
+		return err
+	}
+	line, err = r.ReadString('\n')
+	if err != nil {
+		return err
+	}
+	data := strings.Fields(line)
+	accepts, err := strconv.ParseUint(data[0], 10, 64)
+	if err != nil {
+		return err
+	}
+
+	handled, err := strconv.ParseUint(data[1], 10, 64)
+	if err != nil {
+		return err
+	}
+	requests, err := strconv.ParseUint(data[2], 10, 64)
+	if err != nil {
+		return err
+	}
+
+	// Reading/Writing/Waiting
+	line, err = r.ReadString('\n')
+	if err != nil {
+		return err
+	}
+	data = strings.Fields(line)
+	reading, err := strconv.ParseUint(data[1], 10, 64)
+	if err != nil {
+		return err
+	}
+	writing, err := strconv.ParseUint(data[3], 10, 64)
+	if err != nil {
+		return err
+	}
+	waiting, err := strconv.ParseUint(data[5], 10, 64)
+	if err != nil {
+		return err
+	}
+
+	tags := getTags(addr)
+	fields := map[string]interface{}{
+		"active":   active,
+		"accepts":  accepts,
+		"handled":  handled,
+		"requests": requests,
+		"reading":  reading,
+		"writing":  writing,
+		"waiting":  waiting,
+	}
+	acc.AddFields("nginx", fields, tags)
+
+	return nil
+}
+
+// Get tag(s) for the nginx plugin
+func getTags(addr *url.URL) map[string]string {
+	h := addr.Host
+	host, port, err := net.SplitHostPort(h)
+	if err != nil {
+		host = addr.Host
+		if addr.Scheme == "http" {
+			port = "80"
+		} else if addr.Scheme == "https" {
+			port = "443"
+		} else {
+			port = ""
+		}
+	}
+	return map[string]string{"server": host, "port": port}
+}
+
+func init() {
+	inputs.Add("nginx", func() telegraf.Input {
+		return &Nginx{}
+	})
+}

vendor/modules.txt

@@ -4,6 +4,8 @@ github.com/BurntSushi/toml
 github.com/MichaelTJones/pcg
 # github.com/Shopify/sarama v1.27.1
 github.com/Shopify/sarama
+# github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d
+github.com/alecthomas/units
 # github.com/apache/thrift v0.13.0 => github.com/m3db/thrift v0.0.0-20190820191926-05b5a2227fe4
 github.com/apache/thrift/lib/go/thrift
 # github.com/beorn7/perks v1.0.1
@@ -138,12 +140,14 @@ github.com/influxdata/influxdb/models
 github.com/influxdata/influxdb/pkg/escape
 # github.com/influxdata/telegraf v1.16.2
 github.com/influxdata/telegraf
+github.com/influxdata/telegraf/internal
 github.com/influxdata/telegraf/metric
 github.com/influxdata/telegraf/plugins/common/tls
 github.com/influxdata/telegraf/plugins/inputs
 github.com/influxdata/telegraf/plugins/inputs/mysql
 github.com/influxdata/telegraf/plugins/inputs/mysql/v1
 github.com/influxdata/telegraf/plugins/inputs/mysql/v2
+github.com/influxdata/telegraf/plugins/inputs/nginx
 github.com/influxdata/telegraf/plugins/inputs/redis
 github.com/influxdata/telegraf/selfstat
 github.com/influxdata/telegraf/testutil