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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build darwin linux openbsd
// +build !nomeminfo
package collector
import (
"fmt"
"strings"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
)
const (
memInfoSubsystem = "memory"
)
type meminfoCollector struct {
logger log.Logger
}
func init() {
registerCollector("meminfo", defaultEnabled, NewMeminfoCollector)
}
// NewMeminfoCollector returns a new Collector exposing memory stats.
func NewMeminfoCollector(logger log.Logger) (Collector, error) {
return &meminfoCollector{logger}, nil
}
// Update calls (*meminfoCollector).getMemInfo to get the platform specific
// memory metrics.
func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) error {
var metricType prometheus.ValueType
memInfo, err := c.getMemInfo()
if err != nil {
return fmt.Errorf("couldn't get meminfo: %w", err)
}
level.Debug(c.logger).Log("msg", "Set node_mem", "memInfo", memInfo)
for k, v := range memInfo {
if strings.HasSuffix(k, "_total") {
metricType = prometheus.CounterValue
} else {
metricType = prometheus.GaugeValue
}
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName(namespace, memInfoSubsystem, k),
fmt.Sprintf("Memory information field %s.", k),
nil, nil,
),
metricType, v,
)
}
return nil
}
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