Node_Exporter/collector/devstat_freebsd.go

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// 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 !nodevstat
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package collector
import (
"errors"
"fmt"
"github.com/prometheus/client_golang/prometheus"
)
/*
#cgo LDFLAGS: -ldevstat -lkvm
#include <devstat.h>
#include <fcntl.h>
#include <libgeom.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct {
uint64_t read;
uint64_t write;
uint64_t free;
} Bytes;
typedef struct {
uint64_t other;
uint64_t read;
uint64_t write;
uint64_t free;
} Transfers;
typedef struct {
double other;
double read;
double write;
double free;
} Duration;
typedef struct {
char device[DEVSTAT_NAME_LEN];
int unit;
Bytes bytes;
Transfers transfers;
Duration duration;
long busyTime;
uint64_t blocks;
} Stats;
int _get_ndevs() {
struct statinfo current;
int num_devices;
current.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
if (current.dinfo == NULL)
return -2;
devstat_checkversion(NULL);
if (devstat_getdevs(NULL, &current) == -1)
return -1;
return current.dinfo->numdevs;
}
Stats _get_stats(int i) {
struct statinfo current;
int num_devices;
current.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
devstat_getdevs(NULL, &current);
num_devices = current.dinfo->numdevs;
Stats stats;
uint64_t bytes_read, bytes_write, bytes_free;
uint64_t transfers_other, transfers_read, transfers_write, transfers_free;
long double duration_other, duration_read, duration_write, duration_free;
long double busy_time;
uint64_t blocks;
strcpy(stats.device, current.dinfo->devices[i].device_name);
stats.unit = current.dinfo->devices[i].unit_number;
devstat_compute_statistics(&current.dinfo->devices[i],
NULL,
1.0,
DSM_TOTAL_BYTES_READ, &bytes_read,
DSM_TOTAL_BYTES_WRITE, &bytes_write,
DSM_TOTAL_BYTES_FREE, &bytes_free,
DSM_TOTAL_TRANSFERS_OTHER, &transfers_other,
DSM_TOTAL_TRANSFERS_READ, &transfers_read,
DSM_TOTAL_TRANSFERS_WRITE, &transfers_write,
DSM_TOTAL_TRANSFERS_FREE, &transfers_free,
DSM_TOTAL_DURATION_OTHER, &duration_other,
DSM_TOTAL_DURATION_READ, &duration_read,
DSM_TOTAL_DURATION_WRITE, &duration_write,
DSM_TOTAL_DURATION_FREE, &duration_free,
DSM_TOTAL_BUSY_TIME, &busy_time,
DSM_TOTAL_BLOCKS, &blocks,
DSM_NONE);
stats.bytes.read = bytes_read;
stats.bytes.write = bytes_write;
stats.bytes.free = bytes_free;
stats.transfers.other = transfers_other;
stats.transfers.read = transfers_read;
stats.transfers.write = transfers_write;
stats.transfers.free = transfers_free;
stats.duration.other = duration_other;
stats.duration.read = duration_read;
stats.duration.write = duration_write;
stats.duration.free = duration_free;
stats.busyTime = busy_time;
stats.blocks = blocks;
return stats;
}
*/
import "C"
const (
devstatSubsystem = "devstat"
)
type devstatCollector struct {
bytes typedDesc
bytes_total typedDesc
transfers typedDesc
duration typedDesc
busyTime typedDesc
blocks typedDesc
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}
func init() {
Factories["devstat"] = NewDevstatCollector
}
// Takes a prometheus registry and returns a new Collector exposing
// Device stats.
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func NewDevstatCollector() (Collector, error) {
return &devstatCollector{
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},
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}, nil
}
func (c *devstatCollector) Update(ch chan<- prometheus.Metric) (err error) {
count := C._get_ndevs()
if count == -1 {
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return errors.New("devstat_getdevs() failed")
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}
if count == -2 {
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return errors.New("calloc() failed")
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}
for i := C.int(0); i < count; i++ {
stats := C._get_stats(i)
device := fmt.Sprintf("%s%d", C.GoString(&stats.device[0]), stats.unit)
ch <- c.bytes.mustNewConstMetric(float64(stats.bytes.read), device, "read")
ch <- c.bytes.mustNewConstMetric(float64(stats.bytes.write), device, "write")
ch <- c.transfers.mustNewConstMetric(float64(stats.transfers.other), device, "other")
ch <- c.transfers.mustNewConstMetric(float64(stats.transfers.read), device, "read")
ch <- c.transfers.mustNewConstMetric(float64(stats.transfers.write), device, "write")
ch <- c.duration.mustNewConstMetric(float64(stats.duration.other), device, "other")
ch <- c.duration.mustNewConstMetric(float64(stats.duration.read), device, "read")
ch <- c.duration.mustNewConstMetric(float64(stats.duration.write), device, "write")
ch <- c.busyTime.mustNewConstMetric(float64(stats.busyTime), device)
ch <- c.blocks.mustNewConstMetric(float64(stats.blocks), device)
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}
return err
}