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339 lines
8.9 KiB
339 lines
8.9 KiB
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package graphite
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"regexp"
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"testing"
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"time"
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"github.com/prometheus/common/model"
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"golang.org/x/net/context"
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"github.com/prometheus/client_golang/prometheus"
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)
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func TestSanitize(t *testing.T) {
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testCases := []struct {
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in, out string
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}{
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{in: "hello", out: "hello"},
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{in: "hE/l1o", out: "hE_l1o"},
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{in: "he,*ll(.o", out: "he_ll_o"},
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{in: "hello_there%^&", out: "hello_there_"},
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{in: "hell-.o", out: "hell-_o"},
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}
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var buf bytes.Buffer
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w := bufio.NewWriter(&buf)
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for i, tc := range testCases {
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if err := writeSanitized(w, tc.in); err != nil {
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t.Fatalf("write failed: %v", err)
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}
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if err := w.Flush(); err != nil {
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t.Fatalf("flush failed: %v", err)
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}
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if want, got := tc.out, buf.String(); want != got {
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t.Fatalf("test case index %d: got sanitized string %s, want %s", i, got, want)
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}
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buf.Reset()
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}
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}
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func TestWriteSummary(t *testing.T) {
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sumVec := prometheus.NewSummaryVec(
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prometheus.SummaryOpts{
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Name: "name",
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Help: "docstring",
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ConstLabels: prometheus.Labels{"constname": "constvalue"},
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Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
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},
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[]string{"labelname"},
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)
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sumVec.WithLabelValues("val1").Observe(float64(10))
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sumVec.WithLabelValues("val1").Observe(float64(20))
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sumVec.WithLabelValues("val1").Observe(float64(30))
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sumVec.WithLabelValues("val2").Observe(float64(20))
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sumVec.WithLabelValues("val2").Observe(float64(30))
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sumVec.WithLabelValues("val2").Observe(float64(40))
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reg := prometheus.NewRegistry()
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reg.MustRegister(sumVec)
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mfs, err := reg.Gather()
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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testCases := []struct {
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prefix string
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}{
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{prefix: "prefix"},
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{prefix: "pre/fix"},
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{prefix: "pre.fix"},
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}
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const want = `%s.name.constname.constvalue.labelname.val1.quantile.0_5 20 1477043
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%s.name.constname.constvalue.labelname.val1.quantile.0_9 30 1477043
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%s.name.constname.constvalue.labelname.val1.quantile.0_99 30 1477043
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%s.name_sum.constname.constvalue.labelname.val1 60 1477043
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%s.name_count.constname.constvalue.labelname.val1 3 1477043
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%s.name.constname.constvalue.labelname.val2.quantile.0_5 30 1477043
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%s.name.constname.constvalue.labelname.val2.quantile.0_9 40 1477043
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%s.name.constname.constvalue.labelname.val2.quantile.0_99 40 1477043
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%s.name_sum.constname.constvalue.labelname.val2 90 1477043
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%s.name_count.constname.constvalue.labelname.val2 3 1477043
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`
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for i, tc := range testCases {
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now := model.Time(1477043083)
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var buf bytes.Buffer
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err = writeMetrics(&buf, mfs, tc.prefix, now)
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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wantWithPrefix := fmt.Sprintf(want,
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tc.prefix, tc.prefix, tc.prefix, tc.prefix, tc.prefix,
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tc.prefix, tc.prefix, tc.prefix, tc.prefix, tc.prefix,
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)
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if got := buf.String(); wantWithPrefix != got {
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t.Fatalf("test case index %d: wanted \n%s\n, got \n%s\n", i, wantWithPrefix, got)
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}
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}
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}
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func TestWriteHistogram(t *testing.T) {
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histVec := prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "name",
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Help: "docstring",
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ConstLabels: prometheus.Labels{"constname": "constvalue"},
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Buckets: []float64{0.01, 0.02, 0.05, 0.1},
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},
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[]string{"labelname"},
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)
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histVec.WithLabelValues("val1").Observe(float64(10))
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histVec.WithLabelValues("val1").Observe(float64(20))
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histVec.WithLabelValues("val1").Observe(float64(30))
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histVec.WithLabelValues("val2").Observe(float64(20))
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histVec.WithLabelValues("val2").Observe(float64(30))
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histVec.WithLabelValues("val2").Observe(float64(40))
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reg := prometheus.NewRegistry()
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reg.MustRegister(histVec)
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mfs, err := reg.Gather()
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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now := model.Time(1477043083)
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var buf bytes.Buffer
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err = writeMetrics(&buf, mfs, "prefix", now)
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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want := `prefix.name_bucket.constname.constvalue.labelname.val1.le.0_01 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val1.le.0_02 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val1.le.0_05 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val1.le.0_1 0 1477043
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prefix.name_sum.constname.constvalue.labelname.val1 60 1477043
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prefix.name_count.constname.constvalue.labelname.val1 3 1477043
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prefix.name_bucket.constname.constvalue.labelname.val1.le._Inf 3 1477043
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prefix.name_bucket.constname.constvalue.labelname.val2.le.0_01 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val2.le.0_02 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val2.le.0_05 0 1477043
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prefix.name_bucket.constname.constvalue.labelname.val2.le.0_1 0 1477043
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prefix.name_sum.constname.constvalue.labelname.val2 90 1477043
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prefix.name_count.constname.constvalue.labelname.val2 3 1477043
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prefix.name_bucket.constname.constvalue.labelname.val2.le._Inf 3 1477043
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`
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if got := buf.String(); want != got {
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t.Fatalf("wanted \n%s\n, got \n%s\n", want, got)
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}
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}
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func TestToReader(t *testing.T) {
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cntVec := prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "name",
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Help: "docstring",
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ConstLabels: prometheus.Labels{"constname": "constvalue"},
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},
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[]string{"labelname"},
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)
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cntVec.WithLabelValues("val1").Inc()
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cntVec.WithLabelValues("val2").Inc()
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reg := prometheus.NewRegistry()
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reg.MustRegister(cntVec)
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want := `prefix.name.constname.constvalue.labelname.val1 1 1477043
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prefix.name.constname.constvalue.labelname.val2 1 1477043
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`
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mfs, err := reg.Gather()
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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now := model.Time(1477043083)
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var buf bytes.Buffer
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err = writeMetrics(&buf, mfs, "prefix", now)
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if err != nil {
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t.Fatalf("error: %v", err)
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}
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if got := buf.String(); want != got {
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t.Fatalf("wanted \n%s\n, got \n%s\n", want, got)
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}
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}
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func TestPush(t *testing.T) {
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reg := prometheus.NewRegistry()
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cntVec := prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "name",
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Help: "docstring",
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ConstLabels: prometheus.Labels{"constname": "constvalue"},
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},
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[]string{"labelname"},
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)
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cntVec.WithLabelValues("val1").Inc()
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cntVec.WithLabelValues("val2").Inc()
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reg.MustRegister(cntVec)
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host := "localhost"
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port := ":56789"
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b, err := NewBridge(&Config{
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URL: host + port,
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Gatherer: reg,
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Prefix: "prefix",
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})
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if err != nil {
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t.Fatalf("error creating bridge: %v", err)
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}
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nmg, err := newMockGraphite(port)
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if err != nil {
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t.Fatalf("error creating mock graphite: %v", err)
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}
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defer nmg.Close()
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err = b.Push()
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if err != nil {
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t.Fatalf("error pushing: %v", err)
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}
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wants := []string{
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"prefix.name.constname.constvalue.labelname.val1 1",
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"prefix.name.constname.constvalue.labelname.val2 1",
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}
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select {
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case got := <-nmg.readc:
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for _, want := range wants {
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matched, err := regexp.MatchString(want, got)
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if err != nil {
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t.Fatalf("error pushing: %v", err)
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}
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if !matched {
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t.Fatalf("missing metric:\nno match for %s received by server:\n%s", want, got)
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}
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}
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return
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case err := <-nmg.errc:
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t.Fatalf("error reading push: %v", err)
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case <-time.After(50 * time.Millisecond):
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t.Fatalf("no result from graphite server")
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}
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}
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func newMockGraphite(port string) (*mockGraphite, error) {
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readc := make(chan string)
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errc := make(chan error)
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ln, err := net.Listen("tcp", port)
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if err != nil {
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return nil, err
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}
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go func() {
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conn, err := ln.Accept()
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if err != nil {
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errc <- err
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}
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var b bytes.Buffer
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io.Copy(&b, conn)
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readc <- b.String()
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}()
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return &mockGraphite{
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readc: readc,
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errc: errc,
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Listener: ln,
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}, nil
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}
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type mockGraphite struct {
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readc chan string
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errc chan error
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net.Listener
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}
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func ExampleBridge() {
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b, err := NewBridge(&Config{
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URL: "graphite.example.org:3099",
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Gatherer: prometheus.DefaultGatherer,
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Prefix: "prefix",
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Interval: 15 * time.Second,
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Timeout: 10 * time.Second,
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ErrorHandling: AbortOnError,
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Logger: log.New(os.Stdout, "graphite bridge: ", log.Lshortfile),
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})
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if err != nil {
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panic(err)
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}
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go func() {
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// Start something in a goroutine that uses metrics.
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}()
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// Push initial metrics to Graphite. Fail fast if the push fails.
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if err := b.Push(); err != nil {
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panic(err)
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}
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// Create a Context to control stopping the Run() loop that pushes
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// metrics to Graphite.
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// Start pushing metrics to Graphite in the Run() loop.
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b.Run(ctx)
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}
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