mirror of
https://github.com/prometheus/node_exporter
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d7348a5c78
* updates for zfsonlinux 0.7.5 * add constants for KSTAT_DATA_* types * added e2e test for negative values represented by uint64 that can result from ZFS bugs
113 lines
3.0 KiB
Go
113 lines
3.0 KiB
Go
// Copyright 2016 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 linux
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// +build !nozfs
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package collector
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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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var errZFSNotAvailable = errors.New("ZFS / ZFS statistics are not available")
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type zfsSysctl string
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func init() {
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registerCollector("zfs", defaultEnabled, NewZFSCollector)
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}
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type zfsCollector struct {
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linuxProcpathBase string
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linuxZpoolIoPath string
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linuxPathMap map[string]string
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}
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// NewZFSCollector returns a new Collector exposing ZFS statistics.
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func NewZFSCollector() (Collector, error) {
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return &zfsCollector{
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linuxProcpathBase: "spl/kstat/zfs",
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linuxZpoolIoPath: "/*/io",
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linuxPathMap: map[string]string{
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"zfs_abd": "abdstats",
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"zfs_arc": "arcstats",
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"zfs_dbuf": "dbuf_stats",
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"zfs_dmu_tx": "dmu_tx",
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"zfs_dnode": "dnodestats",
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"zfs_fm": "fm",
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"zfs_vdev_cache": "vdev_cache_stats", // vdev_cache is deprecated
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"zfs_vdev_mirror": "vdev_mirror_stats",
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"zfs_xuio": "xuio_stats", // no known consumers of the XUIO interface on Linux exist
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"zfs_zfetch": "zfetchstats",
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"zfs_zil": "zil",
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},
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}, nil
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}
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func (c *zfsCollector) Update(ch chan<- prometheus.Metric) error {
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for subsystem := range c.linuxPathMap {
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if err := c.updateZfsStats(subsystem, ch); err != nil {
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if err == errZFSNotAvailable {
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log.Debug(err)
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// ZFS /proc files are added as new features to ZFS arrive, it is ok to continue
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continue
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}
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return err
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}
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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 strings.Replace(parts[len(parts)-1], "-", "_", -1)
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}
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func (c *zfsCollector) constSysctlMetric(subsystem string, sysctl zfsSysctl, value uint64) 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, 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) constPoolMetric(poolName string, sysctl zfsSysctl, value uint64) 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, "zfs_zpool", metricName),
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string(sysctl),
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[]string{"zpool"},
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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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poolName,
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)
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}
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