mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
116 lines
3.8 KiB
Go
116 lines
3.8 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.
|
|
|
|
//go:build !nodevstat
|
|
// +build !nodevstat
|
|
|
|
package collector
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"sync"
|
|
"unsafe"
|
|
|
|
"github.com/go-kit/log"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// #cgo LDFLAGS: -ldevstat -lkvm -lelf
|
|
// #include "devstat_freebsd.h"
|
|
import "C"
|
|
|
|
const (
|
|
devstatSubsystem = "devstat"
|
|
)
|
|
|
|
type devstatCollector struct {
|
|
mu sync.Mutex
|
|
devinfo *C.struct_devinfo
|
|
|
|
bytes typedDesc
|
|
transfers typedDesc
|
|
duration typedDesc
|
|
busyTime typedDesc
|
|
blocks typedDesc
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("devstat", defaultDisabled, NewDevstatCollector)
|
|
}
|
|
|
|
// NewDevstatCollector returns a new Collector exposing Device stats.
|
|
func NewDevstatCollector(logger log.Logger) (Collector, error) {
|
|
return &devstatCollector{
|
|
devinfo: &C.struct_devinfo{},
|
|
bytes: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, devstatSubsystem, "bytes_total"),
|
|
"The total number of bytes in transactions.",
|
|
[]string{"device", "type"}, nil,
|
|
), prometheus.CounterValue},
|
|
transfers: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, devstatSubsystem, "transfers_total"),
|
|
"The total number of transactions.",
|
|
[]string{"device", "type"}, nil,
|
|
), prometheus.CounterValue},
|
|
duration: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, devstatSubsystem, "duration_seconds_total"),
|
|
"The total duration of transactions in seconds.",
|
|
[]string{"device", "type"}, nil,
|
|
), prometheus.CounterValue},
|
|
busyTime: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, devstatSubsystem, "busy_time_seconds_total"),
|
|
"Total time the device had one or more transactions outstanding in seconds.",
|
|
[]string{"device"}, nil,
|
|
), prometheus.CounterValue},
|
|
blocks: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, devstatSubsystem, "blocks_transferred_total"),
|
|
"The total number of blocks transferred.",
|
|
[]string{"device"}, nil,
|
|
), prometheus.CounterValue},
|
|
logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
func (c *devstatCollector) Update(ch chan<- prometheus.Metric) error {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
|
|
var stats *C.Stats
|
|
n := C._get_stats(c.devinfo, &stats)
|
|
if n == -1 {
|
|
return errors.New("devstat_getdevs failed")
|
|
}
|
|
|
|
base := unsafe.Pointer(stats)
|
|
for i := C.int(0); i < n; i++ {
|
|
offset := i * C.int(C.sizeof_Stats)
|
|
stat := (*C.Stats)(unsafe.Pointer(uintptr(base) + uintptr(offset)))
|
|
|
|
device := fmt.Sprintf("%s%d", C.GoString(&stat.device[0]), stat.unit)
|
|
ch <- c.bytes.mustNewConstMetric(float64(stat.bytes.read), device, "read")
|
|
ch <- c.bytes.mustNewConstMetric(float64(stat.bytes.write), device, "write")
|
|
ch <- c.transfers.mustNewConstMetric(float64(stat.transfers.other), device, "other")
|
|
ch <- c.transfers.mustNewConstMetric(float64(stat.transfers.read), device, "read")
|
|
ch <- c.transfers.mustNewConstMetric(float64(stat.transfers.write), device, "write")
|
|
ch <- c.duration.mustNewConstMetric(float64(stat.duration.other), device, "other")
|
|
ch <- c.duration.mustNewConstMetric(float64(stat.duration.read), device, "read")
|
|
ch <- c.duration.mustNewConstMetric(float64(stat.duration.write), device, "write")
|
|
ch <- c.busyTime.mustNewConstMetric(float64(stat.busyTime), device)
|
|
ch <- c.blocks.mustNewConstMetric(float64(stat.blocks), device)
|
|
}
|
|
C.free(unsafe.Pointer(stats))
|
|
return nil
|
|
}
|