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https://github.com/prometheus/prometheus
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caa71fb3c7
This change enables the PrometheusRemoteWriteBehind alert’s expression to be evaluated even when the remote endpoint has never been reached. As a result, PrometheusRemoteWriteBehind will fire to easily detect configuration mistakes (such as incorrect endpoint URLs) or unrecoverable connectivity issues. See https://github.com/prometheus/prometheus/issues/14350 for details. Signed-off-by: machine424 <ayoubmrini424@gmail.com>
42 lines
1001 B
Go
42 lines
1001 B
Go
// Copyright 2019 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 remote
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import (
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"sync"
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"github.com/prometheus/client_golang/prometheus"
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)
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type maxTimestamp struct {
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mtx sync.Mutex
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value float64
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prometheus.Gauge
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}
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func (m *maxTimestamp) Set(value float64) {
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m.mtx.Lock()
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defer m.mtx.Unlock()
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if value > m.value {
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m.value = value
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m.Gauge.Set(value)
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}
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}
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func (m *maxTimestamp) Get() float64 {
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m.mtx.Lock()
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defer m.mtx.Unlock()
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return m.value
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}
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