node_exporter/collector/uname_linux.go
Tobias Klauser d73f1e60c4 Simplify Utsname string conversion (#716)
* Update golang.org/x/sys/unix

This allows to use simplified string conversion of Utsname members.

* Simplify Utsname string conversion

Use Utsname from golang.org/x/sys/unix which contains byte array
instead of int8/uint8 array members. This allows to simplify the string
conversions of these members.
2017-11-02 11:57:14 +01:00

67 lines
1.8 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 !nouname
package collector
import (
"bytes"
"github.com/prometheus/client_golang/prometheus"
"golang.org/x/sys/unix"
)
var unameDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "uname", "info"),
"Labeled system information as provided by the uname system call.",
[]string{
"sysname",
"release",
"version",
"machine",
"nodename",
"domainname",
},
nil,
)
type unameCollector struct{}
func init() {
registerCollector("uname", defaultEnabled, newUnameCollector)
}
// NewUnameCollector returns new unameCollector.
func newUnameCollector() (Collector, error) {
return &unameCollector{}, nil
}
func (c unameCollector) Update(ch chan<- prometheus.Metric) error {
var uname unix.Utsname
if err := unix.Uname(&uname); err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(unameDesc, prometheus.GaugeValue, 1,
string(uname.Sysname[:bytes.IndexByte(uname.Sysname[:], 0)]),
string(uname.Release[:bytes.IndexByte(uname.Release[:], 0)]),
string(uname.Version[:bytes.IndexByte(uname.Version[:], 0)]),
string(uname.Machine[:bytes.IndexByte(uname.Machine[:], 0)]),
string(uname.Nodename[:bytes.IndexByte(uname.Nodename[:], 0)]),
string(uname.Domainname[:bytes.IndexByte(uname.Domainname[:], 0)]),
)
return nil
}