prometheusmetricshost-metricsmachine-metricsnode-metricsprocfsprometheus-exportersystem-informationsystem-metrics
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53 lines
1.5 KiB
53 lines
1.5 KiB
// 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 !noentropy |
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package collector |
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import ( |
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"fmt" |
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"github.com/prometheus/client_golang/prometheus" |
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) |
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type entropyCollector struct { |
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entropy_avail *prometheus.Desc |
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} |
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func init() { |
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Factories["entropy"] = NewEntropyCollector |
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} |
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// Takes a prometheus registry and returns a new Collector exposing |
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// entropy stats |
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func NewEntropyCollector() (Collector, error) { |
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return &entropyCollector{ |
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entropy_avail: prometheus.NewDesc( |
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prometheus.BuildFQName(Namespace, "", "entropy_available_bits"), |
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"Bits of available entropy.", |
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nil, nil, |
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), |
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}, nil |
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} |
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func (c *entropyCollector) Update(ch chan<- prometheus.Metric) (err error) { |
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value, err := readUintFromFile(procFilePath("sys/kernel/random/entropy_avail")) |
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if err != nil { |
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return fmt.Errorf("couldn't get entropy_avail: %s", err) |
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} |
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ch <- prometheus.MustNewConstMetric( |
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c.entropy_avail, prometheus.GaugeValue, float64(value)) |
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return nil |
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}
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