mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-28 06:59:44 -08:00
241 lines
9.4 KiB
Go
241 lines
9.4 KiB
Go
// Copyright 2020 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 collector
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import (
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"fmt"
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"reflect"
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"github.com/go-kit/kit/log"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs"
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)
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const zoneinfoSubsystem = "zoneinfo"
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type zoneinfoCollector struct {
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gaugeMetricDescs map[string]*prometheus.Desc
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counterMetricDescs map[string]*prometheus.Desc
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logger log.Logger
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fs procfs.FS
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}
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func init() {
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registerCollector("zoneinfo", defaultDisabled, NewZoneinfoCollector)
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}
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// NewZoneinfoCollector returns a new Collector exposing zone stats.
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func NewZoneinfoCollector(logger log.Logger) (Collector, error) {
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fs, err := procfs.NewFS(*procPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open procfs: %w", err)
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}
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return &zoneinfoCollector{
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gaugeMetricDescs: createGaugeMetricDescriptions(),
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counterMetricDescs: createCounterMetricDescriptions(),
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logger: logger,
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fs: fs,
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}, nil
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}
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func (c *zoneinfoCollector) Update(ch chan<- prometheus.Metric) error {
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metrics, err := c.fs.Zoneinfo()
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if err != nil {
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return fmt.Errorf("couldn't get zoneinfo: %w", err)
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}
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for _, metric := range metrics {
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node := metric.Node
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zone := metric.Zone
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metricStruct := reflect.ValueOf(metric)
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typeOfMetricStruct := metricStruct.Type()
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for i := 0; i < metricStruct.NumField(); i++ {
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value := reflect.Indirect(metricStruct.Field(i))
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if value.Kind() != reflect.Int64 {
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continue
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}
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metricName := typeOfMetricStruct.Field(i).Name
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desc, ok := c.gaugeMetricDescs[metricName]
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metricType := prometheus.GaugeValue
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if !ok {
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desc = c.counterMetricDescs[metricName]
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metricType = prometheus.CounterValue
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}
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ch <- prometheus.MustNewConstMetric(desc, metricType,
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float64(reflect.Indirect(metricStruct.Field(i)).Int()),
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node, zone)
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}
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for i, value := range metric.Protection {
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metricName := fmt.Sprintf("protection_%d", i)
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desc, ok := c.gaugeMetricDescs[metricName]
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if !ok {
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desc = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, metricName),
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fmt.Sprintf("Protection array %d. field", i),
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[]string{"node", "zone"}, nil)
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c.gaugeMetricDescs[metricName] = desc
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}
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ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue,
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float64(*value), node, zone)
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}
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}
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return nil
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}
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func createGaugeMetricDescriptions() map[string]*prometheus.Desc {
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return map[string]*prometheus.Desc{
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"NrFreePages": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_free_pages"),
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"Total number of free pages in the zone",
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[]string{"node", "zone"}, nil),
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"Min": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "min_pages"),
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"Zone watermark pages_min",
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[]string{"node", "zone"}, nil),
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"Low": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "low_pages"),
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"Zone watermark pages_low",
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[]string{"node", "zone"}, nil),
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"High": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "high_pages"),
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"Zone watermark pages_high",
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[]string{"node", "zone"}, nil),
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"Scanned": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "scanned_pages"),
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"Pages scanned since last reclaim",
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[]string{"node", "zone"}, nil),
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"Spanned": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "spanned_pages"),
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"Total pages spanned by the zone, including holes",
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[]string{"node", "zone"}, nil),
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"Present": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "present_pages"),
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"Physical pages existing within the zone",
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[]string{"node", "zone"}, nil),
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"Managed": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "managed_pages"),
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"Present pages managed by the buddy system",
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[]string{"node", "zone"}, nil),
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"NrActiveAnon": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_active_anon_pages"),
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"Number of anonymous pages recently more used",
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[]string{"node", "zone"}, nil),
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"NrInactiveAnon": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_inactive_anon_pages"),
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"Number of anonymous pages recently less used",
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[]string{"node", "zone"}, nil),
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"NrIsolatedAnon": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_isolated_anon_pages"),
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"Temporary isolated pages from anon lru",
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[]string{"node", "zone"}, nil),
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"NrAnonPages": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_anon_pages"),
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"Number of anonymous pages currently used by the system",
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[]string{"node", "zone"}, nil),
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"NrAnonTransparentHugepages": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_anon_transparent_hugepages"),
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"Number of anonymous transparent huge pages currently used by the system",
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[]string{"node", "zone"}, nil),
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"NrActiveFile": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_active_file_pages"),
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"Number of active pages with file-backing",
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[]string{"node", "zone"}, nil),
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"NrInactiveFile": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_inactive_file_pages"),
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"Number of inactive pages with file-backing",
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[]string{"node", "zone"}, nil),
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"NrIsolatedFile": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_isolated_file_pages"),
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"Temporary isolated pages from file lru",
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[]string{"node", "zone"}, nil),
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"NrFilePages": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_file_pages"),
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"Number of file pages",
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[]string{"node", "zone"}, nil),
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"NrSlabReclaimable": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_slab_reclaimable_pages"),
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"Number of reclaimable slab pages",
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[]string{"node", "zone"}, nil),
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"NrSlabUnreclaimable": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_slab_unreclaimable_pages"),
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"Number of unreclaimable slab pages",
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[]string{"node", "zone"}, nil),
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"NrMlockStack": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_mlock_stack_pages"),
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"mlock()ed pages found and moved off LRU",
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[]string{"node", "zone"}, nil),
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"NrKernelStack": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_kernel_stacks"),
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"Number of kernel stacks",
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[]string{"node", "zone"}, nil),
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"NrMapped": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_mapped_pages"),
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"Number of mapped pages",
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[]string{"node", "zone"}, nil),
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"NrDirty": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_dirty_pages"),
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"Number of dirty pages",
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[]string{"node", "zone"}, nil),
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"NrWriteback": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_writeback_pages"),
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"Number of writeback pages",
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[]string{"node", "zone"}, nil),
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"NrUnevictable": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_unevictable_pages"),
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"Number of unevictable pages",
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[]string{"node", "zone"}, nil),
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"NrShmem": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_shmem_pages"),
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"Number of shmem pages (included tmpfs/GEM pages)",
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[]string{"node", "zone"}, nil),
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}
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}
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func createCounterMetricDescriptions() map[string]*prometheus.Desc {
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return map[string]*prometheus.Desc{
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"NrDirtied": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_dirtied_total"),
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"Page dirtyings since bootup",
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[]string{"node", "zone"}, nil),
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"NrWritten": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "nr_written_total"),
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"Page writings since bootup",
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[]string{"node", "zone"}, nil),
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"NumaHit": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_hit_total"),
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"Allocated in intended node",
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[]string{"node", "zone"}, nil),
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"NumaMiss": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_miss_total"),
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"Allocated in non intended node",
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[]string{"node", "zone"}, nil),
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"NumaForeign": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_foreign_total"),
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"Was intended here, hit elsewhere",
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[]string{"node", "zone"}, nil),
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"NumaInterleave": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_interleave_total"),
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"Interleaver preferred this zone",
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[]string{"node", "zone"}, nil),
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"NumaLocal": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_local_total"),
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"Allocation from local node",
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[]string{"node", "zone"}, nil),
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"NumaOther": prometheus.NewDesc(
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prometheus.BuildFQName(namespace, zoneinfoSubsystem, "numa_other_total"),
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"Allocation from other node",
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[]string{"node", "zone"}, nil),
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}
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}
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