mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-25 06:16:26 +01:00
398 lines
16 KiB
Go
398 lines
16 KiB
Go
// Copyright 2018 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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"os"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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"github.com/prometheus/procfs/nfs"
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)
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// A nfsdCollector is a Collector which gathers metrics from /proc/net/rpc/nfsd.
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// See: https://www.svennd.be/nfsd-stats-explained-procnetrpcnfsd/
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type nfsdCollector struct {
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fs nfs.FS
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requestsDesc *prometheus.Desc
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}
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func init() {
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registerCollector("nfsd", defaultEnabled, NewNFSdCollector)
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}
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const (
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nfsdSubsystem = "nfsd"
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)
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// NewNFSdCollector returns a new Collector exposing /proc/net/rpc/nfsd statistics.
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func NewNFSdCollector() (Collector, error) {
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fs, err := nfs.NewFS(*procPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open procfs: %v", err)
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}
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return &nfsdCollector{
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fs: fs,
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requestsDesc: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "requests_total"),
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"Total number NFSd Requests by method and protocol.",
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[]string{"proto", "method"}, nil,
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),
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}, nil
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}
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// Update implements Collector.
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func (c *nfsdCollector) Update(ch chan<- prometheus.Metric) error {
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stats, err := c.fs.ServerRPCStats()
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if err != nil {
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if os.IsNotExist(err) {
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log.Debugf("Not collecting NFSd metrics: %s", err)
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return nil
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}
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return fmt.Errorf("failed to retrieve nfsd stats: %v", err)
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}
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c.updateNFSdReplyCacheStats(ch, &stats.ReplyCache)
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c.updateNFSdFileHandlesStats(ch, &stats.FileHandles)
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c.updateNFSdInputOutputStats(ch, &stats.InputOutput)
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c.updateNFSdThreadsStats(ch, &stats.Threads)
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c.updateNFSdReadAheadCacheStats(ch, &stats.ReadAheadCache)
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c.updateNFSdNetworkStats(ch, &stats.Network)
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c.updateNFSdServerRPCStats(ch, &stats.ServerRPC)
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c.updateNFSdRequestsv2Stats(ch, &stats.V2Stats)
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c.updateNFSdRequestsv3Stats(ch, &stats.V3Stats)
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c.updateNFSdRequestsv4Stats(ch, &stats.V4Ops)
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return nil
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}
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// updateNFSdReplyCacheStats collects statistics for the reply cache.
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func (c *nfsdCollector) updateNFSdReplyCacheStats(ch chan<- prometheus.Metric, s *nfs.ReplyCache) {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "reply_cache_hits_total"),
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"Total number of NFSd Reply Cache hits (client lost server response).",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.Hits))
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "reply_cache_misses_total"),
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"Total number of NFSd Reply Cache an operation that requires caching (idempotent).",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.Misses))
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "reply_cache_nocache_total"),
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"Total number of NFSd Reply Cache non-idempotent operations (rename/delete/…).",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.NoCache))
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}
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// updateNFSdFileHandlesStats collects statistics for the file handles.
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func (c *nfsdCollector) updateNFSdFileHandlesStats(ch chan<- prometheus.Metric, s *nfs.FileHandles) {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "file_handles_stale_total"),
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"Total number of NFSd stale file handles",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.Stale))
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// NOTE: Other FileHandles entries are unused in the kernel.
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}
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// updateNFSdInputOutputStats collects statistics for the bytes in/out.
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func (c *nfsdCollector) updateNFSdInputOutputStats(ch chan<- prometheus.Metric, s *nfs.InputOutput) {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "disk_bytes_read_total"),
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"Total NFSd bytes read.",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.Read))
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "disk_bytes_written_total"),
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"Total NFSd bytes written.",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.Write))
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}
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// updateNFSdThreadsStats collects statistics for kernel server threads.
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func (c *nfsdCollector) updateNFSdThreadsStats(ch chan<- prometheus.Metric, s *nfs.Threads) {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "server_threads"),
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"Total number of NFSd kernel threads that are running.",
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nil,
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nil,
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),
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prometheus.GaugeValue,
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float64(s.Threads))
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}
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// updateNFSdReadAheadCacheStats collects statistics for the read ahead cache.
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func (c *nfsdCollector) updateNFSdReadAheadCacheStats(ch chan<- prometheus.Metric, s *nfs.ReadAheadCache) {
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "read_ahead_cache_size_blocks"),
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"How large the read ahead cache is in blocks.",
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nil,
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nil,
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),
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prometheus.GaugeValue,
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float64(s.CacheSize))
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "read_ahead_cache_not_found_total"),
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"Total number of NFSd read ahead cache not found.",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.NotFound))
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}
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// updateNFSdNetworkStats collects statistics for network packets/connections.
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func (c *nfsdCollector) updateNFSdNetworkStats(ch chan<- prometheus.Metric, s *nfs.Network) {
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packetDesc := prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "packets_total"),
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"Total NFSd network packets (sent+received) by protocol type.",
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[]string{"proto"},
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nil,
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)
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ch <- prometheus.MustNewConstMetric(
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packetDesc,
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prometheus.CounterValue,
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float64(s.UDPCount), "udp")
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ch <- prometheus.MustNewConstMetric(
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packetDesc,
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prometheus.CounterValue,
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float64(s.TCPCount), "tcp")
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "connections_total"),
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"Total number of NFSd TCP connections.",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.TCPConnect))
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}
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// updateNFSdServerRPCStats collects statistics for kernel server RPCs.
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func (c *nfsdCollector) updateNFSdServerRPCStats(ch chan<- prometheus.Metric, s *nfs.ServerRPC) {
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badRPCDesc := prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "rpc_errors_total"),
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"Total number of NFSd RPC errors by error type.",
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[]string{"error"},
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nil,
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)
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ch <- prometheus.MustNewConstMetric(
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badRPCDesc,
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prometheus.CounterValue,
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float64(s.BadFmt), "fmt")
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ch <- prometheus.MustNewConstMetric(
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badRPCDesc,
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prometheus.CounterValue,
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float64(s.BadAuth), "auth")
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ch <- prometheus.MustNewConstMetric(
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badRPCDesc,
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prometheus.CounterValue,
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float64(s.BadcInt), "cInt")
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, nfsdSubsystem, "server_rpcs_total"),
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"Total number of NFSd RPCs.",
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nil,
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nil,
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),
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prometheus.CounterValue,
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float64(s.RPCCount))
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}
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// updateNFSdRequestsv2Stats collects statistics for NFSv2 requests.
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func (c *nfsdCollector) updateNFSdRequestsv2Stats(ch chan<- prometheus.Metric, s *nfs.V2Stats) {
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const proto = "2"
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.GetAttr), proto, "GetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SetAttr), proto, "SetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Root), proto, "Root")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Lookup), proto, "Lookup")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadLink), proto, "ReadLink")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Read), proto, "Read")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.WrCache), proto, "WrCache")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Write), proto, "Write")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Create), proto, "Create")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Remove), proto, "Remove")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Rename), proto, "Rename")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Link), proto, "Link")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SymLink), proto, "SymLink")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.MkDir), proto, "MkDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.RmDir), proto, "RmDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadDir), proto, "ReadDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.FsStat), proto, "FsStat")
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}
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// updateNFSdRequestsv3Stats collects statistics for NFSv3 requests.
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func (c *nfsdCollector) updateNFSdRequestsv3Stats(ch chan<- prometheus.Metric, s *nfs.V3Stats) {
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const proto = "3"
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.GetAttr), proto, "GetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SetAttr), proto, "SetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Lookup), proto, "Lookup")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Access), proto, "Access")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadLink), proto, "ReadLink")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Read), proto, "Read")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Write), proto, "Write")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Create), proto, "Create")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.MkDir), proto, "MkDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SymLink), proto, "SymLink")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.MkNod), proto, "MkNod")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Remove), proto, "Remove")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.RmDir), proto, "RmDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Rename), proto, "Rename")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Link), proto, "Link")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadDir), proto, "ReadDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadDirPlus), proto, "ReadDirPlus")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.FsStat), proto, "FsStat")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.FsInfo), proto, "FsInfo")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.PathConf), proto, "PathConf")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Commit), proto, "Commit")
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}
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// updateNFSdRequestsv4Stats collects statistics for NFSv4 requests.
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func (c *nfsdCollector) updateNFSdRequestsv4Stats(ch chan<- prometheus.Metric, s *nfs.V4Ops) {
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const proto = "4"
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Access), proto, "Access")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Close), proto, "Close")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Commit), proto, "Commit")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Create), proto, "Create")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.DelegPurge), proto, "DelegPurge")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.DelegReturn), proto, "DelegReturn")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.GetAttr), proto, "GetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.GetFH), proto, "GetFH")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Link), proto, "Link")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Lock), proto, "Lock")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Lockt), proto, "Lockt")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Locku), proto, "Locku")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Lookup), proto, "Lookup")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.LookupRoot), proto, "LookupRoot")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Nverify), proto, "Nverify")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Open), proto, "Open")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.OpenAttr), proto, "OpenAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.OpenConfirm), proto, "OpenConfirm")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.OpenDgrd), proto, "OpenDgrd")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.PutFH), proto, "PutFH")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Read), proto, "Read")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadDir), proto, "ReadDir")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.ReadLink), proto, "ReadLink")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Remove), proto, "Remove")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Rename), proto, "Rename")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Renew), proto, "Renew")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.RestoreFH), proto, "RestoreFH")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SaveFH), proto, "SaveFH")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SecInfo), proto, "SecInfo")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.SetAttr), proto, "SetAttr")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Verify), proto, "Verify")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.Write), proto, "Write")
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ch <- prometheus.MustNewConstMetric(c.requestsDesc, prometheus.CounterValue,
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float64(s.RelLockOwner), proto, "RelLockOwner")
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}
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