mirror of
https://github.com/prometheus/node_exporter.git
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101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
// Copyright 2017 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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//go:build (freebsd || dragonfly) && !noexec
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// +build freebsd dragonfly
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// +build !noexec
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package collector
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import (
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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)
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type execCollector struct {
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sysctls []bsdSysctl
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logger log.Logger
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}
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func init() {
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registerCollector("exec", defaultEnabled, NewExecCollector)
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}
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// NewExecCollector returns a new Collector exposing system execution statistics.
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func NewExecCollector(logger log.Logger) (Collector, error) {
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// From sys/vm/vm_meter.c:
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// All are of type CTLTYPE_UINT.
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//
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// vm.stats.sys.v_swtch: Context switches
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// vm.stats.sys.v_trap: Traps
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// vm.stats.sys.v_syscall: System calls
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// vm.stats.sys.v_intr: Device interrupts
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// vm.stats.sys.v_soft: Software interrupts
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// vm.stats.vm.v_forks: Number of fork() calls
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return &execCollector{
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sysctls: []bsdSysctl{
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{
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name: "exec_context_switches_total",
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description: "Context switches since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.sys.v_swtch",
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},
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{
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name: "exec_traps_total",
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description: "Traps since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.sys.v_trap",
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},
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{
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name: "exec_system_calls_total",
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description: "System calls since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.sys.v_syscall",
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},
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{
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name: "exec_device_interrupts_total",
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description: "Device interrupts since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.sys.v_intr",
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},
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{
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name: "exec_software_interrupts_total",
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description: "Software interrupts since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.sys.v_soft",
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},
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{
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name: "exec_forks_total",
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description: "Number of fork() calls since system boot. Resets at architecture unsigned integer.",
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mib: "vm.stats.vm.v_forks",
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},
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},
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logger: logger,
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}, nil
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}
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// Update pushes exec statistics onto ch
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func (c *execCollector) Update(ch chan<- prometheus.Metric) error {
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for _, m := range c.sysctls {
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v, err := m.Value()
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if err != nil {
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return err
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}
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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namespace+"_"+m.name,
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m.description,
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nil, nil,
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), prometheus.CounterValue, v)
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}
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return nil
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}
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