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https://github.com/prometheus/node_exporter.git
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dfa53f835a
* Use `errors.Is()` for unwrapping errors. * Use `%w` error verb in internal error formatting. Signed-off-by: Ben Kochie <superq@gmail.com>
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build !noloadavg
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package collector
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import (
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"fmt"
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"io/ioutil"
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"strconv"
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"strings"
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)
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// Read loadavg from /proc.
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func getLoad() (loads []float64, err error) {
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data, err := ioutil.ReadFile(procFilePath("loadavg"))
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if err != nil {
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return nil, err
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}
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loads, err = parseLoad(string(data))
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if err != nil {
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return nil, err
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}
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return loads, nil
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}
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// Parse /proc loadavg and return 1m, 5m and 15m.
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func parseLoad(data string) (loads []float64, err error) {
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loads = make([]float64, 3)
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parts := strings.Fields(data)
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if len(parts) < 3 {
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return nil, fmt.Errorf("unexpected content in %s", procFilePath("loadavg"))
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}
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for i, load := range parts[0:3] {
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loads[i], err = strconv.ParseFloat(load, 64)
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if err != nil {
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return nil, fmt.Errorf("could not parse load '%s': %w", load, err)
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}
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}
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return loads, nil
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}
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