110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
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package collector
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// +build linux freebsd
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// +build !nozfs
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import (
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"errors"
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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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type zfsMetricValue int
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const zfsErrorValue = zfsMetricValue(-1)
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var zfsNotAvailableError = errors.New("ZFS / ZFS statistics are not available")
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type zfsSysctl string
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type zfsSubsystemName string
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const (
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arc = zfsSubsystemName("zfsArc")
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zpoolSubsystem = zfsSubsystemName("zfsPool")
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)
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// Metrics
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type zfsMetric struct {
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subsystem zfsSubsystemName // The Prometheus subsystem name.
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name string // The Prometheus name of the metric.
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sysctl zfsSysctl // The sysctl of the ZFS metric.
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}
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type datasetMetric struct {
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subsystem zfsSubsystemName
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name string
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}
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// Collector
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func init() {
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Factories["zfs"] = NewZFSCollector
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}
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type zfsCollector struct {
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zfsMetrics []zfsMetric
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}
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func NewZFSCollector() (Collector, error) {
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return &zfsCollector{}, nil
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}
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func (c *zfsCollector) Update(ch chan<- prometheus.Metric) (err error) {
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err = c.zfsAvailable()
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switch {
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case err == zfsNotAvailableError:
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log.Debug(err)
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return nil
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case err != nil:
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return err
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}
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// Arcstats
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err = c.updateArcstats(ch)
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if err != nil {
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return err
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}
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// Pool stats
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return c.updatePoolStats(ch)
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}
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func (s zfsSysctl) metricName() string {
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parts := strings.Split(string(s), ".")
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return parts[len(parts)-1]
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}
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func (c *zfsCollector) ConstSysctlMetric(subsystem zfsSubsystemName, sysctl zfsSysctl, value zfsMetricValue) prometheus.Metric {
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metricName := sysctl.metricName()
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return prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, string(subsystem), metricName),
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string(sysctl),
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nil,
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nil,
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),
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prometheus.UntypedValue,
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float64(value),
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)
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}
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func (c *zfsCollector) ConstZpoolMetric(pool, name string, value float64) prometheus.Metric {
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return prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, string(zpoolSubsystem), name),
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name,
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[]string{"pool"},
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nil,
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),
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prometheus.UntypedValue,
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float64(value),
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pool,
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)
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}
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