record config metrics again

.gitignore

@@ -3,3 +3,5 @@ coverage.out
 dist/
 pkg/
 src/
+.DS_Store
+.idea

Gopkg.lock

@@ -39,7 +39,7 @@
 [[projects]]
   name = "github.com/prometheus/client_golang"
-  packages = ["prometheus"]
+  packages = ["prometheus","prometheus/promhttp"]
   revision = "c5b7fccd204277076155f10851dad72b76a49317"
   version = "v0.8.0"
@@ -61,6 +61,12 @@
   packages = [".","xfs"]
   revision = "a6e9df898b1336106c743392c48ee0b71f5c4efa"
+[[projects]]
+  name = "github.com/prometheus/prometheus"
+  packages = ["util/strutil"]
+  revision = "0a74f98628a0463dddc90528220c94de5032d1a0"
+  version = "v2.0.0"
+
 [[projects]]
   name = "github.com/sirupsen/logrus"
   packages = ["."]
@@ -82,6 +88,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "bc84e4257274df380dd9009bc56bc2a8b36471c760c8e0eb2f9bc578e9b24749"
+  inputs-digest = "2e013c0d4c7fe5e64f3b7e69e8aaabff0bb64b43d5acb6e2fddc383e2104dec3"
   solver-name = "gps-cdcl"
   solver-version = 1

exporter/redis.go

@@ -11,6 +11,7 @@ import (
 	"github.com/garyburd/redigo/redis"
 	"github.com/prometheus/client_golang/prometheus"
+	prom_strutil "github.com/prometheus/prometheus/util/strutil"
 	log "github.com/sirupsen/logrus"
 )
@@ -280,19 +281,15 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 }
 func includeMetric(s string) bool {
-
 	if strings.HasPrefix(s, "db") || strings.HasPrefix(s, "cmdstat_") || strings.HasPrefix(s, "cluster_") {
 		return true
 	}
-
 	_, ok := metricMap[s]
-
 	return ok
 }
 func sanitizeMetricName(n string) string {
-	n = strings.Replace(n, "-", "_", -1)
-	return n
+	return prom_strutil.SanitizeLabelName(n)
 }
 func extractVal(s string) (val float64, err error) {
@@ -373,6 +370,29 @@ func parseConnectedSlaveString(slaveName string, slaveInfo string) (offset float
 	return
 }
+func extractConfigMetrics(config []string, addr string, alias string, scrapes chan<- scrapeResult) error {
+	if len(config)%2 != 0 {
+		return fmt.Errorf("invalid config: %#v", config)
+	}
+
+	for pos := 0; pos < len(config)/2; pos++ {
+		strKey := config[pos*2]
+		strVal := config[pos*2+1]
+
+		// todo: we can add more configs to this map if there's interest
+		if !map[string]bool{
+			"maxmemory": true,
+		}[strKey] {
+			continue
+		}
+
+		if val, err := strconv.ParseFloat(strVal, 64); err == nil {
+			scrapes <- scrapeResult{Name: fmt.Sprintf("config_%s", config[pos*2]), Addr: addr, Alias: alias, Value: val}
+		}
+	}
+	return nil
+}
+
 func (e *Exporter) extractInfoMetrics(info, addr string, alias string, scrapes chan<- scrapeResult) error {
 	cmdstats := false
 	lines := strings.Split(info, "\r\n")
@@ -432,6 +452,8 @@ func (e *Exporter) extractInfoMetrics(info, addr string, alias string, scrapes c
 		if cmdstats {
 			/*
+				Format:
+
 				cmdstat_get:calls=21,usec=175,usec_per_call=8.33
 				cmdstat_set:calls=61,usec=3139,usec_per_call=51.46
 				cmdstat_setex:calls=75,usec=1260,usec_per_call=16.80
@@ -557,18 +579,24 @@ func (e *Exporter) scrapeRedisHost(scrapes chan<- scrapeResult, addr string, idx
 	defer c.Close()
 	log.Debugf("connected to: %s", addr)
+	if config, err := redis.Strings(c.Do("CONFIG", "GET", "*")); err == nil {
+		extractConfigMetrics(config, addr, e.redis.Aliases[idx], scrapes)
+	} else {
+		log.Errorf("redis err: %s", err)
+	}
+
 	info, err := redis.String(c.Do("INFO", "ALL"))
 	if err == nil {
 		e.extractInfoMetrics(info, addr, e.redis.Aliases[idx], scrapes)
 	} else {
-		log.Printf("redis err: %s", err)
+		log.Errorf("redis err: %s", err)
 		return err
 	}
 	if strings.Index(info, "cluster_enabled:1") != -1 {
 		info, err = redis.String(c.Do("CLUSTER", "INFO"))
 		if err != nil {
-			log.Printf("redis err: %s", err)
+			log.Errorf("redis err: %s", err)
 		} else {
 			e.extractInfoMetrics(info, addr, e.redis.Aliases[idx], scrapes)
 		}
@@ -602,9 +630,11 @@ func (e *Exporter) scrapeRedisHost(scrapes chan<- scrapeResult, addr string, idx
 		}
 		for _, key := range obtainedKeys {
+			dbLabel := "db" + k.db
+			keyLabel := key
 			if tempVal, err := c.Do("GET", key); err == nil && tempVal != nil {
 				if val, err := strconv.ParseFloat(fmt.Sprintf("%s", tempVal), 64); err == nil {
-					e.keyValues.WithLabelValues(addr, e.redis.Aliases[idx], "db"+k.db, key).Set(val)
+					e.keyValues.WithLabelValues(addr, e.redis.Aliases[idx], dbLabel, keyLabel).Set(val)
 				}
 			}
@@ -617,7 +647,7 @@ func (e *Exporter) scrapeRedisHost(scrapes chan<- scrapeResult, addr string, idx
 				"STRLEN",
 			} {
 				if tempVal, err := c.Do(op, key); err == nil && tempVal != nil {
-					e.keySizes.WithLabelValues(addr, e.redis.Aliases[idx], "db"+k.db, key).Set(float64(tempVal.(int64)))
+					e.keySizes.WithLabelValues(addr, e.redis.Aliases[idx], dbLabel, keyLabel).Set(float64(tempVal.(int64)))
 					break
 				}
 			}

exporter/redis_test.go

@@ -322,6 +322,7 @@ func TestExporterMetrics(t *testing.T) {
 		"db_avg_ttl_seconds",
 		"used_cpu_sys",
 		"loading_dump_file", // testing renames
+		"config_maxmemory",  // testing config extraction
 	}
 	for _, k := range wantKeys {
@@ -781,7 +782,7 @@ func TestKeysReset(t *testing.T) {
 func init() {
 	for _, n := range []string{"john", "paul", "ringo", "george"} {
-		key := fmt.Sprintf("key:%s-%d", n, ts)
+		key := fmt.Sprintf("key_%s_%d", n, ts)
 		keys = append(keys, key)
 	}
@@ -789,7 +790,7 @@ func init() {
 	keys = append(keys, "wildcard", "wildbeast", "wildwoods")
 	for _, n := range []string{"A.J.", "Howie", "Nick", "Kevin", "Brian"} {
-		key := fmt.Sprintf("key:exp-%s-%d", n, ts)
+		key := fmt.Sprintf("key_exp_%s_%d", n, ts)
 		keysExpiring = append(keysExpiring, key)
 	}

main.go

@@ -49,7 +49,7 @@ func main() {
 	default:
 		log.SetFormatter(&log.TextFormatter{})
 	}
-	log.Printf("Redis Metrics Exporter %s    build date: %s    sha1: %s    Go: %s\n",
+	log.Printf("Redis Metrics Exporter %s    build date: %s    sha1: %s    Go: %s",
 		VERSION, BUILD_DATE, COMMIT_SHA1,
 		runtime.Version(),
 	)

vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go

+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Copyright (c) 2013, The Prometheus Authors
+// All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license that can be found
+// in the LICENSE file.
+
+// Package promhttp contains functions to create http.Handler instances to
+// expose Prometheus metrics via HTTP. In later versions of this package, it
+// will also contain tooling to instrument instances of http.Handler and
+// http.RoundTripper.
+//
+// promhttp.Handler acts on the prometheus.DefaultGatherer. With HandlerFor,
+// you can create a handler for a custom registry or anything that implements
+// the Gatherer interface. It also allows to create handlers that act
+// differently on errors or allow to log errors.
+package promhttp
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"sync"
+
+	"github.com/prometheus/common/expfmt"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	contentTypeHeader     = "Content-Type"
+	contentLengthHeader   = "Content-Length"
+	contentEncodingHeader = "Content-Encoding"
+	acceptEncodingHeader  = "Accept-Encoding"
+)
+
+var bufPool sync.Pool
+
+func getBuf() *bytes.Buffer {
+	buf := bufPool.Get()
+	if buf == nil {
+		return &bytes.Buffer{}
+	}
+	return buf.(*bytes.Buffer)
+}
+
+func giveBuf(buf *bytes.Buffer) {
+	buf.Reset()
+	bufPool.Put(buf)
+}
+
+// Handler returns an HTTP handler for the prometheus.DefaultGatherer. The
+// Handler uses the default HandlerOpts, i.e. report the first error as an HTTP
+// error, no error logging, and compression if requested by the client.
+//
+// If you want to create a Handler for the DefaultGatherer with different
+// HandlerOpts, create it with HandlerFor with prometheus.DefaultGatherer and
+// your desired HandlerOpts.
+func Handler() http.Handler {
+	return HandlerFor(prometheus.DefaultGatherer, HandlerOpts{})
+}
+
+// HandlerFor returns an http.Handler for the provided Gatherer. The behavior
+// of the Handler is defined by the provided HandlerOpts.
+func HandlerFor(reg prometheus.Gatherer, opts HandlerOpts) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		mfs, err := reg.Gather()
+		if err != nil {
+			if opts.ErrorLog != nil {
+				opts.ErrorLog.Println("error gathering metrics:", err)
+			}
+			switch opts.ErrorHandling {
+			case PanicOnError:
+				panic(err)
+			case ContinueOnError:
+				if len(mfs) == 0 {
+					http.Error(w, "No metrics gathered, last error:\n\n"+err.Error(), http.StatusInternalServerError)
+					return
+				}
+			case HTTPErrorOnError:
+				http.Error(w, "An error has occurred during metrics gathering:\n\n"+err.Error(), http.StatusInternalServerError)
+				return
+			}
+		}
+
+		contentType := expfmt.Negotiate(req.Header)
+		buf := getBuf()
+		defer giveBuf(buf)
+		writer, encoding := decorateWriter(req, buf, opts.DisableCompression)
+		enc := expfmt.NewEncoder(writer, contentType)
+		var lastErr error
+		for _, mf := range mfs {
+			if err := enc.Encode(mf); err != nil {
+				lastErr = err
+				if opts.ErrorLog != nil {
+					opts.ErrorLog.Println("error encoding metric family:", err)
+				}
+				switch opts.ErrorHandling {
+				case PanicOnError:
+					panic(err)
+				case ContinueOnError:
+					// Handled later.
+				case HTTPErrorOnError:
+					http.Error(w, "An error has occurred during metrics encoding:\n\n"+err.Error(), http.StatusInternalServerError)
+					return
+				}
+			}
+		}
+		if closer, ok := writer.(io.Closer); ok {
+			closer.Close()
+		}
+		if lastErr != nil && buf.Len() == 0 {
+			http.Error(w, "No metrics encoded, last error:\n\n"+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		header := w.Header()
+		header.Set(contentTypeHeader, string(contentType))
+		header.Set(contentLengthHeader, fmt.Sprint(buf.Len()))
+		if encoding != "" {
+			header.Set(contentEncodingHeader, encoding)
+		}
+		w.Write(buf.Bytes())
+		// TODO(beorn7): Consider streaming serving of metrics.
+	})
+}
+
+// HandlerErrorHandling defines how a Handler serving metrics will handle
+// errors.
+type HandlerErrorHandling int
+
+// These constants cause handlers serving metrics to behave as described if
+// errors are encountered.
+const (
+	// Serve an HTTP status code 500 upon the first error
+	// encountered. Report the error message in the body.
+	HTTPErrorOnError HandlerErrorHandling = iota
+	// Ignore errors and try to serve as many metrics as possible.  However,
+	// if no metrics can be served, serve an HTTP status code 500 and the
+	// last error message in the body. Only use this in deliberate "best
+	// effort" metrics collection scenarios. It is recommended to at least
+	// log errors (by providing an ErrorLog in HandlerOpts) to not mask
+	// errors completely.
+	ContinueOnError
+	// Panic upon the first error encountered (useful for "crash only" apps).
+	PanicOnError
+)
+
+// Logger is the minimal interface HandlerOpts needs for logging. Note that
+// log.Logger from the standard library implements this interface, and it is
+// easy to implement by custom loggers, if they don't do so already anyway.
+type Logger interface {
+	Println(v ...interface{})
+}
+
+// HandlerOpts specifies options how to serve metrics via an http.Handler. The
+// zero value of HandlerOpts is a reasonable default.
+type HandlerOpts struct {
+	// ErrorLog specifies an optional logger for errors collecting and
+	// serving metrics. If nil, errors are not logged at all.
+	ErrorLog Logger
+	// ErrorHandling defines how errors are handled. Note that errors are
+	// logged regardless of the configured ErrorHandling provided ErrorLog
+	// is not nil.
+	ErrorHandling HandlerErrorHandling
+	// If DisableCompression is true, the handler will never compress the
+	// response, even if requested by the client.
+	DisableCompression bool
+}
+
+// decorateWriter wraps a writer to handle gzip compression if requested.  It
+// returns the decorated writer and the appropriate "Content-Encoding" header
+// (which is empty if no compression is enabled).
+func decorateWriter(request *http.Request, writer io.Writer, compressionDisabled bool) (io.Writer, string) {
+	if compressionDisabled {
+		return writer, ""
+	}
+	header := request.Header.Get(acceptEncodingHeader)
+	parts := strings.Split(header, ",")
+	for _, part := range parts {
+		part := strings.TrimSpace(part)
+		if part == "gzip" || strings.HasPrefix(part, "gzip;") {
+			return gzip.NewWriter(writer), "gzip"
+		}
+	}
+	return writer, ""
+}

vendor/github.com/prometheus/client_golang/prometheus/promhttp/http_test.go

+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Copyright (c) 2013, The Prometheus Authors
+// All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license that can be found
+// in the LICENSE file.
+
+package promhttp
+
+import (
+	"bytes"
+	"errors"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type errorCollector struct{}
+
+func (e errorCollector) Describe(ch chan<- *prometheus.Desc) {
+	ch <- prometheus.NewDesc("invalid_metric", "not helpful", nil, nil)
+}
+
+func (e errorCollector) Collect(ch chan<- prometheus.Metric) {
+	ch <- prometheus.NewInvalidMetric(
+		prometheus.NewDesc("invalid_metric", "not helpful", nil, nil),
+		errors.New("collect error"),
+	)
+}
+
+func TestHandlerErrorHandling(t *testing.T) {
+
+	// Create a registry that collects a MetricFamily with two elements,
+	// another with one, and reports an error.
+	reg := prometheus.NewRegistry()
+
+	cnt := prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "the_count",
+		Help: "Ah-ah-ah! Thunder and lightning!",
+	})
+	reg.MustRegister(cnt)
+
+	cntVec := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name:        "name",
+			Help:        "docstring",
+			ConstLabels: prometheus.Labels{"constname": "constvalue"},
+		},
+		[]string{"labelname"},
+	)
+	cntVec.WithLabelValues("val1").Inc()
+	cntVec.WithLabelValues("val2").Inc()
+	reg.MustRegister(cntVec)
+
+	reg.MustRegister(errorCollector{})
+
+	logBuf := &bytes.Buffer{}
+	logger := log.New(logBuf, "", 0)
+
+	writer := httptest.NewRecorder()
+	request, _ := http.NewRequest("GET", "/", nil)
+	request.Header.Add("Accept", "test/plain")
+
+	errorHandler := HandlerFor(reg, HandlerOpts{
+		ErrorLog:      logger,
+		ErrorHandling: HTTPErrorOnError,
+	})
+	continueHandler := HandlerFor(reg, HandlerOpts{
+		ErrorLog:      logger,
+		ErrorHandling: ContinueOnError,
+	})
+	panicHandler := HandlerFor(reg, HandlerOpts{
+		ErrorLog:      logger,
+		ErrorHandling: PanicOnError,
+	})
+	wantMsg := `error gathering metrics: error collecting metric Desc{fqName: "invalid_metric", help: "not helpful", constLabels: {}, variableLabels: []}: collect error
+`
+	wantErrorBody := `An error has occurred during metrics gathering:
+
+error collecting metric Desc{fqName: "invalid_metric", help: "not helpful", constLabels: {}, variableLabels: []}: collect error
+`
+	wantOKBody := `# HELP name docstring
+# TYPE name counter
+name{constname="constvalue",labelname="val1"} 1
+name{constname="constvalue",labelname="val2"} 1
+# HELP the_count Ah-ah-ah! Thunder and lightning!
+# TYPE the_count counter
+the_count 0
+`
+
+	errorHandler.ServeHTTP(writer, request)
+	if got, want := writer.Code, http.StatusInternalServerError; got != want {
+		t.Errorf("got HTTP status code %d, want %d", got, want)
+	}
+	if got := logBuf.String(); got != wantMsg {
+		t.Errorf("got log message:\n%s\nwant log mesage:\n%s\n", got, wantMsg)
+	}
+	if got := writer.Body.String(); got != wantErrorBody {
+		t.Errorf("got body:\n%s\nwant body:\n%s\n", got, wantErrorBody)
+	}
+	logBuf.Reset()
+	writer.Body.Reset()
+	writer.Code = http.StatusOK
+
+	continueHandler.ServeHTTP(writer, request)
+	if got, want := writer.Code, http.StatusOK; got != want {
+		t.Errorf("got HTTP status code %d, want %d", got, want)
+	}
+	if got := logBuf.String(); got != wantMsg {
+		t.Errorf("got log message %q, want %q", got, wantMsg)
+	}
+	if got := writer.Body.String(); got != wantOKBody {
+		t.Errorf("got body %q, want %q", got, wantOKBody)
+	}
+
+	defer func() {
+		if err := recover(); err == nil {
+			t.Error("expected panic from panicHandler")
+		}
+	}()
+	panicHandler.ServeHTTP(writer, request)
+}

vendor/github.com/prometheus/prometheus/.dockerignore

+data/
+.build/
+.tarballs/
+
+!.build/linux-amd64/

vendor/github.com/prometheus/prometheus/.gitignore

+*#
+.#*
+*-stamp
+/*.yaml
+/*.yml
+/*.rules
+*.exe
+
+# Editor files #
+################
+*~
+.*.swp
+.*.swo
+*.iml
+.idea
+tags
+.history
+.vscode
+
+/prometheus
+/promtool
+benchmark.txt
+/data
+/cmd/prometheus/data
+/cmd/prometheus/debug
+/.build
+/.release
+/.tarballs
+
+!/circle.yml
+!/.travis.yml
+!/.promu.yml
+/documentation/examples/remote_storage/remote_storage_adapter/remote_storage_adapter
+/documentation/examples/remote_storage/example_write_adapter/example_writer_adapter

vendor/github.com/prometheus/prometheus/.promu.yml

+repository:
+    path: github.com/prometheus/prometheus
+build:
+    binaries:
+        - name: prometheus
+          path: ./cmd/prometheus
+        - name: promtool
+          path: ./cmd/promtool
+    flags: -a -tags netgo
+    ldflags: |
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Version={{.Version}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Revision={{.Revision}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Branch={{.Branch}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildUser={{user}}@{{host}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildDate={{date "20060102-15:04:05"}}
+tarball:
+    files:
+        - consoles
+        - console_libraries
+        - documentation/examples/prometheus.yml
+        - LICENSE
+        - NOTICE
+crossbuild:
+    platforms:
+        - linux/amd64
+        - linux/386
+        - darwin/amd64
+        - darwin/386
+        - windows/amd64
+        - windows/386
+        - freebsd/amd64
+        - freebsd/386
+        - openbsd/amd64
+        - openbsd/386
+        - netbsd/amd64
+        - netbsd/386
+        - dragonfly/amd64
+        - linux/arm
+        - linux/arm64
+        - freebsd/arm
+        # Temporarily deactivated as golang.org/x/sys does not have syscalls
+        # implemented for that os/platform combination.
+        #- openbsd/arm
+        #- linux/mips64
+        #- linux/mips64le
+        - netbsd/arm
+        - linux/ppc64
+        - linux/ppc64le
+

vendor/github.com/prometheus/prometheus/.travis.yml

+sudo: false
+
+language: go
+
+go:
+- 1.9.x
+- 1.x
+
+go_import_path: github.com/prometheus/prometheus
+
+script:
+- make check_license style test

vendor/github.com/prometheus/prometheus/CONTRIBUTING.md

+# Contributing
+
+Prometheus uses GitHub to manage reviews of pull requests.
+
+* If you are a new contributor see: [Steps to Contribute](#steps-to-contribute)
+
+* If you have a trivial fix or improvement, go ahead and create a pull request,
+  addressing (with `@...`) a suitable maintainer of this repository (see
+  [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request.
+
+* If you plan to do something more involved, first discuss your ideas
+  on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers).
+  This will avoid unnecessary work and surely give you and us a good deal
+  of inspiration.
+
+* Relevant coding style guidelines are the [Go Code Review
+  Comments](https://code.google.com/p/go-wiki/wiki/CodeReviewComments)
+  and the _Formatting and style_ section of Peter Bourgon's [Go: Best
+  Practices for Production
+  Environments](http://peter.bourgon.org/go-in-production/#formatting-and-style).
+
+
+## Steps to Contribute
+
+Should you wish to work on an issue, please claim it first by commenting on the GitHub issue that you want to work on it. This is to prevent duplicated efforts from contributors on the same issue.
+
+Please check the [`low-hanging-fruit`](https://github.com/prometheus/prometheus/issues?q=is%3Aissue+is%3Aopen+label%3A%22low+hanging+fruit%22) label to find issues that are good for getting started. If you have questions about one of the issues, with or without the tag, please comment on them and one of the maintainers will clarify it. For a quicker response, contact us over [IRC](https://prometheus.io/community).
+
+For complete instructions on how to compile see: [Building From Source](https://github.com/prometheus/prometheus#building-from-source)
+
+For quickly compiling and testing your changes do:
+```
+# For building.
+go build ./cmd/prometheus/
+./prometheus
+
+# For testing.
+make test         # Make sure all the tests pass before you commit and push :)
+```
+
+All our issues are regularly tagged so that you can also filter down the issues involving the components you want to work on. For our labelling policy refer [the wiki page](https://github.com/prometheus/prometheus/wiki/Label-Names-and-Descriptions).
+
+## Pull Request Checklist
+
+* Branch from the master branch and, if needed, rebase to the current master branch before submitting your pull request. If it doesn't merge cleanly with master you may be asked to rebase your changes.
+
+* Commits should be as small as possible, while ensuring that each commit is correct independently (i.e., each commit should compile and pass tests).
+
+* If your patch is not getting reviewed or you need a specific person to review it, you can @-reply a reviewer asking for a review in the pull request or a comment, or you can ask for a review on IRC channel [#prometheus](https://webchat.freenode.net/?channels=#prometheus) on irc.freenode.net (for the easiest start, [join via Riot](https://riot.im/app/#/room/#prometheus:matrix.org)).
+
+* Add tests relevant to the fixed bug or new feature.

vendor/github.com/prometheus/prometheus/Dockerfile

+FROM        quay.io/prometheus/busybox:latest
+LABEL maintainer "The Prometheus Authors <prometheus-developers@googlegroups.com>"
+
+COPY prometheus                             /bin/prometheus
+COPY promtool                               /bin/promtool
+COPY documentation/examples/prometheus.yml  /etc/prometheus/prometheus.yml
+COPY console_libraries/                     /usr/share/prometheus/console_libraries/
+COPY consoles/                              /usr/share/prometheus/consoles/
+
+RUN ln -s /usr/share/prometheus/console_libraries /usr/share/prometheus/consoles/ /etc/prometheus/
+RUN mkdir -p /prometheus && \
+    chown -R nobody:nogroup etc/prometheus /prometheus
+
+USER       nobody
+EXPOSE     9090
+VOLUME     [ "/prometheus" ]
+WORKDIR    /prometheus
+ENTRYPOINT [ "/bin/prometheus" ]
+CMD        [ "--config.file=/etc/prometheus/prometheus.yml", \
+             "--storage.tsdb.path=/prometheus", \
+             "--web.console.libraries=/usr/share/prometheus/console_libraries", \
+             "--web.console.templates=/usr/share/prometheus/consoles" ]

vendor/github.com/prometheus/prometheus/LICENSE

+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
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+
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+      transformation or translation of a Source form, including but
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/prometheus/prometheus/MAINTAINERS.md

+Maintainers of this repository with their focus areas:
+
+* Brian Brazil <brian.brazil@robustperception.io> @brian-brazil: Console templates; semantics of PromQL, service discovery, and relabeling.
+* Fabian Reinartz <fabian.reinartz@coreos.com> @fabxc: PromQL parsing and evaluation; implementation of retrieval, alert notification, and service discovery.
+* Julius Volz <julius.volz@gmail.com> @juliusv: Remote storage integrations; web UI.
+

vendor/github.com/prometheus/prometheus/Makefile

+# Copyright 2015 The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+GO           ?= GO15VENDOREXPERIMENT=1 go
+GOFMT        ?= $(GO)fmt
+FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
+PROMU        := $(FIRST_GOPATH)/bin/promu
+STATICCHECK  := $(FIRST_GOPATH)/bin/staticcheck
+pkgs          = $(shell $(GO) list ./... | grep -v /vendor/)
+
+PREFIX                  ?= $(shell pwd)
+BIN_DIR                 ?= $(shell pwd)
+DOCKER_IMAGE_NAME       ?= prometheus
+DOCKER_IMAGE_TAG        ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD))
+
+ifdef DEBUG
+	bindata_flags = -debug
+endif
+
+STATICCHECK_IGNORE = \
+  github.com/prometheus/prometheus/discovery/kubernetes/kubernetes.go:SA1019 \
+  github.com/prometheus/prometheus/discovery/kubernetes/node.go:SA1019 \
+  github.com/prometheus/prometheus/documentation/examples/remote_storage/remote_storage_adapter/main.go:SA1019 \
+  github.com/prometheus/prometheus/pkg/textparse/lex.l.go:SA4006 \
+  github.com/prometheus/prometheus/pkg/pool/pool.go:SA6002 \
+  github.com/prometheus/prometheus/promql/engine.go:SA6002 \
+  github.com/prometheus/prometheus/web/web.go:SA1019
+
+all: format staticcheck build test
+
+style:
+	@echo ">> checking code style"
+	@! $(GOFMT) -d $(shell find . -path ./vendor -prune -o -name '*.go' -print) | grep '^'
+
+check_license:
+	@echo ">> checking license header"
+	@./scripts/check_license.sh
+
+# TODO(fabxc): example tests temporarily removed.
+test-short:
+	@echo ">> running short tests"
+	@$(GO) test -short $(shell $(GO) list ./... | grep -v /vendor/ | grep -v examples)
+
+test:
+	@echo ">> running all tests"
+	@$(GO) test $(shell $(GO) list ./... | grep -v /vendor/ | grep -v examples)
+
+format:
+	@echo ">> formatting code"
+	@$(GO) fmt $(pkgs)
+
+vet:
+	@echo ">> vetting code"
+	@$(GO) vet $(pkgs)
+
+staticcheck: $(STATICCHECK)
+	@echo ">> running staticcheck"
+	@$(STATICCHECK) -ignore "$(STATICCHECK_IGNORE)" $(pkgs)
+
+build: promu
+	@echo ">> building binaries"
+	@$(PROMU) build --prefix $(PREFIX)
+
+tarball: promu
+	@echo ">> building release tarball"
+	@$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)
+
+docker:
+	@echo ">> building docker image"
+	@docker build -t "$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" .
+
+assets:
+	@echo ">> writing assets"
+	@$(GO) get -u github.com/jteeuwen/go-bindata/...
+	@go-bindata $(bindata_flags) -pkg ui -o web/ui/bindata.go -ignore '(.*\.map|bootstrap\.js|bootstrap-theme\.css|bootstrap\.css)'  web/ui/templates/... web/ui/static/...
+	@$(GO) fmt ./web/ui
+
+promu:
+	@echo ">> fetching promu"
+	@GOOS=$(shell uname -s | tr A-Z a-z) \
+	GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m))) \
+	GO="$(GO)" \
+	$(GO) get -u github.com/prometheus/promu
+
+$(FIRST_GOPATH)/bin/staticcheck:
+	@GOOS= GOARCH= $(GO) get -u honnef.co/go/tools/cmd/staticcheck
+
+.PHONY: all style check_license format build test vet assets tarball docker promu staticcheck $(FIRST_GOPATH)/bin/staticcheck

vendor/github.com/prometheus/prometheus/NOTICE

+The Prometheus systems and service monitoring server
+Copyright 2012-2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
+
+
+The following components are included in this product:
+
+Bootstrap
+http://getbootstrap.com
+Copyright 2011-2014 Twitter, Inc.
+Licensed under the MIT License
+
+bootstrap3-typeahead.js
+https://github.com/bassjobsen/Bootstrap-3-Typeahead
+Original written by @mdo and @fat
+Copyright 2014 Bass Jobsen @bassjobsen
+Licensed under the Apache License, Version 2.0
+
+fuzzy
+https://github.com/mattyork/fuzzy
+Original written by @mattyork
+Copyright 2012 Matt York
+Licensed under the MIT License
+
+bootstrap-datetimepicker.js
+https://github.com/Eonasdan/bootstrap-datetimepicker
+Copyright 2015 Jonathan Peterson (@Eonasdan)
+Licensed under the MIT License
+
+moment.js
+https://github.com/moment/moment/
+Copyright JS Foundation and other contributors
+Licensed under the MIT License
+
+Rickshaw
+https://github.com/shutterstock/rickshaw
+Copyright 2011-2014 by Shutterstock Images, LLC
+See https://github.com/shutterstock/rickshaw/blob/master/LICENSE for license details
+
+mustache.js
+https://github.com/janl/mustache.js
+Copyright 2009 Chris Wanstrath (Ruby)
+Copyright 2010-2014 Jan Lehnardt (JavaScript)
+Copyright 2010-2015 The mustache.js community
+Licensed under the MIT License
+
+jQuery
+https://jquery.org
+Copyright jQuery Foundation and other contributors
+Licensed under the MIT License
+
+Protocol Buffers for Go with Gadgets
+http://github.com/gogo/protobuf/
+Copyright (c) 2013, The GoGo Authors.
+See source code for license details.
+
+Go support for leveled logs, analogous to
+https://code.google.com/p/google-glog/
+Copyright 2013 Google Inc.
+Licensed under the Apache License, Version 2.0
+
+Support for streaming Protocol Buffer messages for the Go language (golang).
+https://github.com/matttproud/golang_protobuf_extensions
+Copyright 2013 Matt T. Proud
+Licensed under the Apache License, Version 2.0
+
+DNS library in Go
+http://miek.nl/posts/2014/Aug/16/go-dns-package/
+Copyright 2009 The Go Authors, 2011 Miek Gieben
+See https://github.com/miekg/dns/blob/master/LICENSE for license details.
+
+LevelDB key/value database in Go
+https://github.com/syndtr/goleveldb
+Copyright 2012 Suryandaru Triandana
+See https://github.com/syndtr/goleveldb/blob/master/LICENSE for license details.
+
+gosnappy - a fork of code.google.com/p/snappy-go
+https://github.com/syndtr/gosnappy
+Copyright 2011 The Snappy-Go Authors
+See https://github.com/syndtr/gosnappy/blob/master/LICENSE for license details.
+
+go-zookeeper - Native ZooKeeper client for Go
+https://github.com/samuel/go-zookeeper
+Copyright (c) 2013, Samuel Stauffer <samuel@descolada.com>
+See https://github.com/samuel/go-zookeeper/blob/master/LICENSE for license details.

vendor/github.com/prometheus/prometheus/README.md

+# Prometheus [![Build Status](https://travis-ci.org/prometheus/prometheus.svg)][travis]
+
+[![CircleCI](https://circleci.com/gh/prometheus/prometheus/tree/master.svg?style=shield)][circleci]
+[![Docker Repository on Quay](https://quay.io/repository/prometheus/prometheus/status)][quay]
+[![Docker Pulls](https://img.shields.io/docker/pulls/prom/prometheus.svg?maxAge=604800)][hub]
+[![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/prometheus)](https://goreportcard.com/report/github.com/prometheus/prometheus)
+
+Visit [prometheus.io](https://prometheus.io) for the full documentation,
+examples and guides.
+
+Prometheus, a [Cloud Native Computing Foundation](https://cncf.io/) project, is a systems and service monitoring system. It collects metrics
+from configured targets at given intervals, evaluates rule expressions,
+displays the results, and can trigger alerts if some condition is observed
+to be true.
+
+Prometheus' main distinguishing features as compared to other monitoring systems are:
+
+- a **multi-dimensional** data model (timeseries defined by metric name and set of key/value dimensions)
+- a **flexible query language** to leverage this dimensionality
+- no dependency on distributed storage; **single server nodes are autonomous**
+- timeseries collection happens via a **pull model** over HTTP
+- **pushing timeseries** is supported via an intermediary gateway
+- targets are discovered via **service discovery** or **static configuration**
+- multiple modes of **graphing and dashboarding support**
+- support for hierarchical and horizontal **federation**
+
+## Architecture overview
+
+![](https://cdn.rawgit.com/prometheus/prometheus/c34257d069c630685da35bcef084632ffd5d6209/documentation/images/architecture.svg)
+
+## Install
+
+There are various ways of installing Prometheus.
+
+### Precompiled binaries
+
+Precompiled binaries for released versions are available in the
+[*download* section](https://prometheus.io/download/)
+on [prometheus.io](https://prometheus.io). Using the latest production release binary
+is the recommended way of installing Prometheus.
+See the [Installing](https://prometheus.io/docs/introduction/install/)
+chapter in the documentation for all the details.
+
+Debian packages [are available](https://packages.debian.org/sid/net/prometheus).
+
+### Docker images
+
+Docker images are available on [Quay.io](https://quay.io/repository/prometheus/prometheus).
+
+You can launch a Prometheus container for trying it out with
+
+    $ docker run --name prometheus -d -p 127.0.0.1:9090:9090 quay.io/prometheus/prometheus
+
+Prometheus will now be reachable at http://localhost:9090/.
+
+### Building from source
+
+To build Prometheus from the source code yourself you need to have a working
+Go environment with [version 1.8 or greater installed](http://golang.org/doc/install).
+
+You can directly use the `go` tool to download and install the `prometheus`
+and `promtool` binaries into your `GOPATH`:
+
+    $ go get github.com/prometheus/prometheus/cmd/...
+    $ prometheus --config.file=your_config.yml
+
+You can also clone the repository yourself and build using `make`:
+
+    $ mkdir -p $GOPATH/src/github.com/prometheus
+    $ cd $GOPATH/src/github.com/prometheus
+    $ git clone https://github.com/prometheus/prometheus.git
+    $ cd prometheus
+    $ make build
+    $ ./prometheus --config.file=your_config.yml
+
+The Makefile provides several targets:
+
+  * *build*: build the `prometheus` and `promtool` binaries
+  * *test*: run the tests
+  * *test-short*: run the short tests
+  * *format*: format the source code
+  * *vet*: check the source code for common errors
+  * *assets*: rebuild the static assets
+  * *docker*: build a docker container for the current `HEAD`
+
+## More information
+
+  * The source code is periodically indexed: [Prometheus Core](http://godoc.org/github.com/prometheus/prometheus).
+  * You will find a Travis CI configuration in `.travis.yml`.
+  * See the [Community page](https://prometheus.io/community) for how to reach the Prometheus developers and users on various communication channels.
+
+## Contributing
+
+Refer to [CONTRIBUTING.md](https://github.com/prometheus/prometheus/blob/master/CONTRIBUTING.md)
+
+## License
+
+Apache License 2.0, see [LICENSE](https://github.com/prometheus/prometheus/blob/master/LICENSE).
+
+
+[travis]: https://travis-ci.org/prometheus/prometheus
+[hub]: https://hub.docker.com/r/prom/prometheus/
+[circleci]: https://circleci.com/gh/prometheus/prometheus
+[quay]: https://quay.io/repository/prometheus/prometheus

vendor/github.com/prometheus/prometheus/VERSION

+2.0.0