prometheusmetricshost-metricsmachine-metricsnode-metricsprocfsprometheus-exportersystem-informationsystem-metrics
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70 lines
2.2 KiB
70 lines
2.2 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 freebsd darwin,amd64 dragonfly |
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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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"github.com/prometheus/client_golang/prometheus" |
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"golang.org/x/sys/unix" |
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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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Factories["meminfo"] = NewMeminfoCollector |
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} |
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// Takes a prometheus registry and returns a new Collector exposing |
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// 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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func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) (err error) { |
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pages := make(map[string]uint32) |
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size, err := unix.SysctlUint32("vm.stats.vm.v_page_size") |
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if err != nil { |
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return fmt.Errorf("sysctl(vm.stats.vm.v_page_size) failed: %s", err) |
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} |
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pages["active"], _ = unix.SysctlUint32("vm.stats.vm.v_active_count") |
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pages["inactive"], _ = unix.SysctlUint32("vm.stats.vm.v_inactive_count") |
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pages["wire"], _ = unix.SysctlUint32("vm.stats.vm.v_wire_count") |
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pages["cache"], _ = unix.SysctlUint32("vm.stats.vm.v_cache_count") |
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pages["free"], _ = unix.SysctlUint32("vm.stats.vm.v_free_count") |
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pages["swappgsin"], _ = unix.SysctlUint32("vm.stats.vm.v_swappgsin") |
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pages["swappgsout"], _ = unix.SysctlUint32("vm.stats.vm.v_swappgsout") |
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pages["total"], _ = unix.SysctlUint32("vm.stats.vm.v_page_count") |
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for k, v := range pages { |
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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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k+" from sysctl()", |
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nil, nil, |
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), |
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// Convert metrics to kB (same as Linux meminfo). |
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prometheus.UntypedValue, float64(v)*float64(size), |
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) |
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} |
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return err |
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}
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