mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-30 07:40:09 +01:00
103 lines
2.8 KiB
Go
103 lines
2.8 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.
|
|
|
|
// +build freebsd darwin,amd64 dragonfly
|
|
// +build !nomeminfo
|
|
|
|
package collector
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
/*
|
|
#include <stddef.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
int _sysctl(const char* name) {
|
|
int val;
|
|
size_t size = sizeof(val);
|
|
int res = sysctlbyname(name, &val, &size, NULL, 0);
|
|
if (res == -1) {
|
|
return -1;
|
|
}
|
|
if (size != sizeof(val)) {
|
|
return -2;
|
|
}
|
|
return val;
|
|
}
|
|
*/
|
|
import "C"
|
|
|
|
const (
|
|
memInfoSubsystem = "memory"
|
|
)
|
|
|
|
type meminfoCollector struct{}
|
|
|
|
func init() {
|
|
Factories["meminfo"] = NewMeminfoCollector
|
|
}
|
|
|
|
// Takes a prometheus registry and returns a new Collector exposing
|
|
// Memory stats.
|
|
func NewMeminfoCollector() (Collector, error) {
|
|
return &meminfoCollector{}, nil
|
|
}
|
|
|
|
func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
var pages map[string]C.int
|
|
pages = make(map[string]C.int)
|
|
|
|
size := C._sysctl(C.CString("vm.stats.vm.v_page_size"))
|
|
if size == -1 {
|
|
return errors.New("sysctl(vm.stats.vm.v_page_size) failed")
|
|
}
|
|
if size == -2 {
|
|
return errors.New("sysctl(vm.stats.vm.v_page_size) failed, wrong buffer size")
|
|
}
|
|
|
|
pages["active"] = C._sysctl(C.CString("vm.stats.vm.v_active_count"))
|
|
pages["inactive"] = C._sysctl(C.CString("vm.stats.vm.v_inactive_count"))
|
|
pages["wire"] = C._sysctl(C.CString("vm.stats.vm.v_wire_count"))
|
|
pages["cache"] = C._sysctl(C.CString("vm.stats.vm.v_cache_count"))
|
|
pages["free"] = C._sysctl(C.CString("vm.stats.vm.v_free_count"))
|
|
pages["swappgsin"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsin"))
|
|
pages["swappgsout"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsout"))
|
|
pages["total"] = C._sysctl(C.CString("vm.stats.vm.v_page_count"))
|
|
|
|
for key := range pages {
|
|
if pages[key] == -1 {
|
|
return errors.New("sysctl() failed for " + key)
|
|
}
|
|
if pages[key] == -2 {
|
|
return errors.New("sysctl() failed for " + key + ", wrong buffer size")
|
|
}
|
|
}
|
|
|
|
for k, v := range pages {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, memInfoSubsystem, k),
|
|
k+" from sysctl()",
|
|
nil, nil,
|
|
),
|
|
// Convert metrics to kB (same as Linux meminfo).
|
|
prometheus.UntypedValue, float64(v)*float64(size),
|
|
)
|
|
}
|
|
return err
|
|
}
|