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a2e4439086
Allows to use graphite over tcp or udp. Metrics labels
and values are used to construct a valid Graphite path
in a way that will allow us to eventually read them back
and reconstruct the metrics.
For example, this metric:
model.Metric{
model.MetricNameLabel: "test:metric",
"testlabel": "test:value",
"testlabel2": "test:value",
)
Will become:
test:metric.testlabel=test:value.testlabel2=test:value
escape.go takes care of escaping values to match Graphite
character set, it basically uses percent-encoding as a fallback
wich will work pretty will in the graphite/grafana world.
The remote storage module also has an optional 'prefix' parameter
to prefix all metrics with a path (for example, 'prometheus.').
Graphite URLs are simply in the form tcp://host:port or
udp://host:port.
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
// Copyright 2015 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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"testing"
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"github.com/prometheus/common/model"
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)
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var (
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metric = model.Metric{
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model.MetricNameLabel: "test:metric",
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"testlabel": "test:value",
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"many_chars": "abc!ABC:012-3!45ö67~89./(){},=.\"\\",
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}
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)
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func TestEscape(t *testing.T) {
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// Can we correctly keep and escape valid chars.
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value := "abzABZ019(){},'\"\\"
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expected := "abzABZ019\\(\\)\\{\\}\\,\\'\\\"\\\\"
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actual := escape(model.LabelValue(value))
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if expected != actual {
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t.Errorf("Expected %s, got %s", expected, actual)
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}
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// Test percent-encoding.
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value = "é/|_;:%."
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expected = "%C3%A9%2F|_;:%25%2E"
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actual = escape(model.LabelValue(value))
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if expected != actual {
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t.Errorf("Expected %s, got %s", expected, actual)
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}
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}
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func TestPathFromMetric(t *testing.T) {
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expected := ("prefix." +
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"test:metric" +
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".many_chars=abc!ABC:012-3!45%C3%B667~89%2E%2F\\(\\)\\{\\}\\,%3D%2E\\\"\\\\" +
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".testlabel=test:value")
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actual := pathFromMetric(metric, "prefix.")
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if expected != actual {
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t.Errorf("Expected %s, got %s", expected, actual)
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}
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}
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