mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
synced 2026-04-05 17:27:51 +00:00
69 lines
2.4 KiB
Go
69 lines
2.4 KiB
Go
/*
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Copyright 2017 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package client
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import (
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"fmt"
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"strings"
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)
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// LabelNeq produces a not-equal label selector expression.
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// Label is passed verbatim, and value is double-quote escaped
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// using Go's escaping (as per the PromQL rules).
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func LabelNeq(label string, value string) string {
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return fmt.Sprintf("%s!=%q", label, value)
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}
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// LabelEq produces a equal label selector expression.
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// Label is passed verbatim, and value is double-quote escaped
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// using Go's escaping (as per the PromQL rules).
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func LabelEq(label string, value string) string {
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return fmt.Sprintf("%s=%q", label, value)
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}
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// LabelMatches produces a regexp-matching label selector expression.
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// It has similar constraints to LabelNeq.
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func LabelMatches(label string, expr string) string {
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return fmt.Sprintf("%s=~%q", label, expr)
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}
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// LabelNotMatches produces a inverse regexp-matching label selector expression (the opposite of LabelMatches).
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func LabelNotMatches(label string, expr string) string {
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return fmt.Sprintf("%s!~%q", label, expr)
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}
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// NameMatches produces a label selector expression that checks that the series name matches the given expression.
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// It's a convinience wrapper around LabelMatches.
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func NameMatches(expr string) string {
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return LabelMatches("__name__", expr)
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}
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// NameNotMatches produces a label selector expression that checks that the series name doesn't matches the given expression.
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// It's a convenience wrapper around LabelNotMatches.
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func NameNotMatches(expr string) string {
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return LabelNotMatches("__name__", expr)
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}
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// MatchSeries takes a series name, and optionally some label expressions, and returns a series selector.
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// TODO: validate series name and expressions?
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func MatchSeries(name string, labelExpressions ...string) Selector {
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if len(labelExpressions) == 0 {
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return Selector(name)
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}
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return Selector(fmt.Sprintf("%s{%s}", name, strings.Join(labelExpressions, ",")))
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}
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