node_exporter/collector/stat_linux.go
Brian Brazil a98067a294 Make metrics better follow guidelines ()
* Improve stat linux metric names.

cpu is no longer used.

* node_cpu -> node_cpu_seconds_total for Linux

* Improve filesystem metric names with units

* Improve units and names of linux disk stats

Remove sector metrics, the bytes metrics cover those already.

* Infiniband counters should end in _total

* Improve timex metric names, convert to more normal units.

See
3c073991eb/kernel/time/ntp.c (L909)
for what stabil means, looks like a moving average of some form.

* Update test fixture

* For meminfo metrics that had "kB" units, add _bytes

* Interrupts counter should have _total
2018-01-17 17:55:55 +01:00

97 lines
3.0 KiB
Go

// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build !nostat
package collector
import (
"fmt"
"github.com/prometheus/procfs"
"github.com/prometheus/client_golang/prometheus"
)
type statCollector struct {
intr *prometheus.Desc
ctxt *prometheus.Desc
forks *prometheus.Desc
btime *prometheus.Desc
procsRunning *prometheus.Desc
procsBlocked *prometheus.Desc
}
func init() {
registerCollector("stat", defaultEnabled, NewStatCollector)
}
// NewStatCollector returns a new Collector exposing kernel/system statistics.
func NewStatCollector() (Collector, error) {
return &statCollector{
intr: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "intr_total"),
"Total number of interrupts serviced.",
nil, nil,
),
ctxt: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "context_switches_total"),
"Total number of context switches.",
nil, nil,
),
forks: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "forks_total"),
"Total number of forks.",
nil, nil,
),
btime: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "boot_time_seconds"),
"Node boot time, in unixtime.",
nil, nil,
),
procsRunning: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "procs_running"),
"Number of processes in runnable state.",
nil, nil,
),
procsBlocked: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "procs_blocked"),
"Number of processes blocked waiting for I/O to complete.",
nil, nil,
),
}, nil
}
// Update implements Collector and exposes kernel and system statistics.
func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
fs, err := procfs.NewFS(*procPath)
if err != nil {
return fmt.Errorf("failed to open procfs: %v", err)
}
stats, err := fs.NewStat()
if err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(c.intr, prometheus.CounterValue, float64(stats.IRQTotal))
ch <- prometheus.MustNewConstMetric(c.ctxt, prometheus.CounterValue, float64(stats.ContextSwitches))
ch <- prometheus.MustNewConstMetric(c.forks, prometheus.CounterValue, float64(stats.ProcessCreated))
ch <- prometheus.MustNewConstMetric(c.btime, prometheus.GaugeValue, float64(stats.BootTime))
ch <- prometheus.MustNewConstMetric(c.procsRunning, prometheus.GaugeValue, float64(stats.ProcessesRunning))
ch <- prometheus.MustNewConstMetric(c.procsBlocked, prometheus.GaugeValue, float64(stats.ProcessesBlocked))
return nil
}