89 lines
1.8 KiB
Go
89 lines
1.8 KiB
Go
package collector
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"os"
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"strconv"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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)
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const (
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zfsArcstatsProcpath = "spl/kstat/zfs/arcstats"
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)
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func (c *zfsCollector) zfsAvailable() (err error) {
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file, err := c.openArcstatsFile()
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if err != nil {
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file.Close()
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}
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return err
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}
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func (c *zfsCollector) openArcstatsFile() (file *os.File, err error) {
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file, err = os.Open(procFilePath(zfsArcstatsProcpath))
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if err != nil {
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log.Debugf("Cannot open %q for reading. Is the kernel module loaded?", procFilePath(zfsArcstatsProcpath))
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err = zfsNotAvailableError
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}
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return
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}
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func (c *zfsCollector) updateArcstats(ch chan<- prometheus.Metric) (err error) {
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file, err := c.openArcstatsFile()
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if err != nil {
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return err
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}
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defer file.Close()
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return c.parseArcstatsProcfsFile(file, func(s zfsSysctl, v zfsMetricValue) {
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ch <- c.ConstSysctlMetric(arc, s, v)
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})
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}
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func (c *zfsCollector) parseArcstatsProcfsFile(reader io.Reader, handler func(zfsSysctl, zfsMetricValue)) (err error) {
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scanner := bufio.NewScanner(reader)
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parseLine := false
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for scanner.Scan() {
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parts := strings.Fields(scanner.Text())
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if !parseLine && len(parts) == 3 && parts[0] == "name" && parts[1] == "type" && parts[2] == "data" {
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// Start parsing from here.
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parseLine = true
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continue
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}
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if !parseLine || len(parts) < 3 {
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continue
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}
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key := fmt.Sprintf("kstat.zfs.misc.arcstats.%s", parts[0])
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value, err := strconv.Atoi(parts[2])
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if err != nil {
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return fmt.Errorf("could not parse expected integer value for %q", key)
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}
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handler(zfsSysctl(key), zfsMetricValue(value))
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}
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if !parseLine {
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return errors.New("did not parse a single arcstat metric")
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}
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return scanner.Err()
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}
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func (c *zfsCollector) updatePoolStats(ch chan<- prometheus.Metric) (err error) {
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return nil
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}
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