mirror of
https://github.com/prometheus/node_exporter.git
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ebdd524123
* Correctly cast Darwin memory info * Cast stats to float64 before doing math on them to avoid integer wrapping. * Remove invalid `_total` suffix from gauge values. * Handle counters in `meminfo.go`. Signed-off-by: Ben Kochie <superq@gmail.com>
68 lines
1.8 KiB
Go
68 lines
1.8 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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// +build darwin linux openbsd
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// +build !nomeminfo
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package collector
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import (
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"fmt"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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)
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const (
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memInfoSubsystem = "memory"
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)
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type meminfoCollector struct{}
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func init() {
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registerCollector("meminfo", defaultEnabled, NewMeminfoCollector)
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}
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// NewMeminfoCollector returns a new Collector exposing memory stats.
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func NewMeminfoCollector() (Collector, error) {
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return &meminfoCollector{}, nil
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}
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// Update calls (*meminfoCollector).getMemInfo to get the platform specific
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// memory metrics.
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func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) error {
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var metricType prometheus.ValueType
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memInfo, err := c.getMemInfo()
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if err != nil {
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return fmt.Errorf("couldn't get meminfo: %s", err)
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}
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log.Debugf("Set node_mem: %#v", memInfo)
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for k, v := range memInfo {
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if strings.HasSuffix(k, "_total") {
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metricType = prometheus.CounterValue
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} else {
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metricType = prometheus.GaugeValue
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}
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, memInfoSubsystem, k),
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fmt.Sprintf("Memory information field %s.", k),
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nil, nil,
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),
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metricType, v,
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)
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}
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return nil
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}
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