Node_Exporter/collector/zfs_zpool.go

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// Copyright 2016 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.
package collector
import (
"bufio"
"fmt"
"io"
"strconv"
"strings"
)
// zpool metrics
func (c *zfsCollector) parseZpoolOutput(reader io.Reader, handler func(string, string, float64)) (err error) {
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
fields := strings.Fields(scanner.Text())
if len(fields) != 4 {
return fmt.Errorf("unexpected output of zpool command")
}
valueString := fields[2]
switch {
case strings.HasSuffix(fields[2], "%"):
percentage := strings.TrimSuffix(fields[2], "%")
valueString = "0." + percentage
case strings.HasSuffix(fields[2], "x"):
valueString = strings.TrimSuffix(fields[2], "x")
}
value, err := strconv.ParseFloat(valueString, 64)
if err != nil {
return err
}
handler(fields[0], fields[1], value)
}
return scanner.Err()
}