feat: add inputs.mdstat to gather from /proc/mdstat collection (#9101)
This commit is contained in:
John Seekins
GitHub
parent
2370d39e89
commit
435c2a6e33
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@ -265,6 +265,7 @@ For documentation on the latest development code see the [documentation index][d
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* [mailchimp](./plugins/inputs/mailchimp)
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* [marklogic](./plugins/inputs/marklogic)
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* [mcrouter](./plugins/inputs/mcrouter)
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* [mdstat](./plugins/inputs/mdstat)
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* [memcached](./plugins/inputs/memcached)
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* [mem](./plugins/inputs/mem)
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* [mesos](./plugins/inputs/mesos)
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@ -101,6 +101,7 @@ import (
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_ "github.com/influxdata/telegraf/plugins/inputs/mailchimp"
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_ "github.com/influxdata/telegraf/plugins/inputs/marklogic"
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_ "github.com/influxdata/telegraf/plugins/inputs/mcrouter"
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_ "github.com/influxdata/telegraf/plugins/inputs/mdstat"
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_ "github.com/influxdata/telegraf/plugins/inputs/mem"
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_ "github.com/influxdata/telegraf/plugins/inputs/memcached"
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_ "github.com/influxdata/telegraf/plugins/inputs/mesos"
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@ -0,0 +1,49 @@
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# mdstat Input Plugin
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The mdstat plugin gathers statistics about any Linux MD RAID arrays configured on the host
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by reading /proc/mdstat. For a full list of available fields see the
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/proc/mdstat section of the [proc man page](http://man7.org/linux/man-pages/man5/proc.5.html).
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For a better idea of what each field represents, see the
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[mdstat man page](https://raid.wiki.kernel.org/index.php/Mdstat).
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Stat collection based on Prometheus' mdstat collection library at https://github.com/prometheus/procfs/blob/master/mdstat.go
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### Configuration:
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```toml
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# Get kernel statistics from /proc/mdstat
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[[inputs.mdstat]]
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## Sets file path
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## If not specified, then default is /proc/mdstat
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# file_name = "/proc/mdstat"
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```
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### Measurements & Fields:
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- mdstat
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- BlocksSynced (if the array is rebuilding/checking, this is the count of blocks that have been scanned)
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- BlocksSyncedFinishTime (the expected finish time of the rebuild scan, listed in minutes remaining)
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- BlocksSyncedPct (the percentage of the rebuild scan left)
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- BlocksSyncedSpeed (the current speed the rebuild is running at, listed in K/sec)
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- BlocksTotal (the total count of blocks in the array)
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- DisksActive (the number of disks that are currently considered healthy in the array)
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- DisksFailed (the current count of failed disks in the array)
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- DisksSpare (the current count of "spare" disks in the array)
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- DisksTotal (total count of disks in the array)
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### Tags:
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- mdstat
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- ActivityState (`active` or `inactive`)
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- Devices (comma separated list of devices that make up the array)
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- Name (name of the array)
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### Example Output:
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```
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$ telegraf --config ~/ws/telegraf.conf --input-filter mdstat --test
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* Plugin: mdstat, Collection 1
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> mdstat,ActivityState=active,Devices=sdm1\,sdn1,Name=md1 BlocksSynced=231299072i,BlocksSyncedFinishTime=0,BlocksSyncedPct=0,BlocksSyncedSpeed=0,BlocksTotal=231299072i,DisksActive=2i,DisksFailed=0i,DisksSpare=0i,DisksTotal=2i,DisksDown=0i 1617814276000000000
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> mdstat,ActivityState=active,Devices=sdm5\,sdn5,Name=md2 BlocksSynced=2996224i,BlocksSyncedFinishTime=0,BlocksSyncedPct=0,BlocksSyncedSpeed=0,BlocksTotal=2996224i,DisksActive=2i,DisksFailed=0i,DisksSpare=0i,DisksTotal=2i,DisksDown=0i 1617814276000000000
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```
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@ -0,0 +1,313 @@
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// +build linux
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// Copyright 2018 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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//
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// Code has been changed since initial import.
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package mdstat
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import (
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"fmt"
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"io/ioutil"
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"os"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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const (
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defaultHostProc = "/proc"
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envProc = "HOST_PROC"
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)
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var (
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statusLineRE = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[([U_]+)\]`)
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recoveryLineBlocksRE = regexp.MustCompile(`\((\d+)/\d+\)`)
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recoveryLinePctRE = regexp.MustCompile(`= (.+)%`)
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recoveryLineFinishRE = regexp.MustCompile(`finish=(.+)min`)
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recoveryLineSpeedRE = regexp.MustCompile(`speed=(.+)[A-Z]`)
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componentDeviceRE = regexp.MustCompile(`(.*)\[\d+\]`)
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)
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type statusLine struct {
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active int64
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total int64
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size int64
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down int64
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}
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type recoveryLine struct {
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syncedBlocks int64
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pct float64
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finish float64
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speed float64
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}
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type MdstatConf struct {
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FileName string `toml:"file_name"`
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}
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func (k *MdstatConf) Description() string {
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return "Get md array statistics from /proc/mdstat"
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}
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var mdSampleConfig = `
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## Sets file path
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## If not specified, then default is /proc/mdstat
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# file_name = "/proc/mdstat"
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`
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func (k *MdstatConf) SampleConfig() string {
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return mdSampleConfig
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}
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func evalStatusLine(deviceLine, statusLineStr string) (statusLine, error) {
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sizeFields := strings.Fields(statusLineStr)
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if len(sizeFields) < 1 {
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return statusLine{active: 0, total: 0, down: 0, size: 0},
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fmt.Errorf("statusLine empty? %q", statusLineStr)
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}
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sizeStr := sizeFields[0]
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size, err := strconv.ParseInt(sizeStr, 10, 64)
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if err != nil {
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return statusLine{active: 0, total: 0, down: 0, size: 0},
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fmt.Errorf("unexpected statusLine %q: %w", statusLineStr, err)
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}
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if strings.Contains(deviceLine, "raid0") || strings.Contains(deviceLine, "linear") {
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// In the device deviceLine, only disks have a number associated with them in [].
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total := int64(strings.Count(deviceLine, "["))
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return statusLine{active: total, total: total, down: 0, size: size}, nil
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}
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if strings.Contains(deviceLine, "inactive") {
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return statusLine{active: 0, total: 0, down: 0, size: size}, nil
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}
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matches := statusLineRE.FindStringSubmatch(statusLineStr)
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if len(matches) != 5 {
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return statusLine{active: 0, total: 0, down: 0, size: size},
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fmt.Errorf("couldn't find all the substring matches: %s", statusLineStr)
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}
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total, err := strconv.ParseInt(matches[2], 10, 64)
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if err != nil {
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return statusLine{active: 0, total: 0, down: 0, size: size},
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fmt.Errorf("unexpected statusLine %q: %w", statusLineStr, err)
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}
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active, err := strconv.ParseInt(matches[3], 10, 64)
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if err != nil {
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return statusLine{active: 0, total: total, down: 0, size: size},
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fmt.Errorf("unexpected statusLine %q: %w", statusLineStr, err)
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}
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down := int64(strings.Count(matches[4], "_"))
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return statusLine{active: active, total: total, size: size, down: down}, nil
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}
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func evalRecoveryLine(recoveryLineStr string) (recoveryLine, error) {
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// Get count of completed vs. total blocks
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matches := recoveryLineBlocksRE.FindStringSubmatch(recoveryLineStr)
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if len(matches) != 2 {
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return recoveryLine{syncedBlocks: 0, pct: 0, finish: 0, speed: 0},
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fmt.Errorf("unexpected recoveryLine matching syncedBlocks: %s", recoveryLineStr)
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}
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syncedBlocks, err := strconv.ParseInt(matches[1], 10, 64)
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if err != nil {
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return recoveryLine{syncedBlocks: 0, pct: 0, finish: 0, speed: 0},
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fmt.Errorf("error parsing int from recoveryLine %q: %w", recoveryLineStr, err)
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}
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// Get percentage complete
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matches = recoveryLinePctRE.FindStringSubmatch(recoveryLineStr)
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if len(matches) != 2 {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: 0, finish: 0, speed: 0},
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fmt.Errorf("unexpected recoveryLine matching percentage: %s", recoveryLineStr)
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}
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pct, err := strconv.ParseFloat(matches[1], 64)
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if err != nil {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: 0, finish: 0, speed: 0},
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fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLineStr, err)
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}
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// Get time expected left to complete
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matches = recoveryLineFinishRE.FindStringSubmatch(recoveryLineStr)
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if len(matches) != 2 {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: pct, finish: 0, speed: 0},
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fmt.Errorf("unexpected recoveryLine matching est. finish time: %s", recoveryLineStr)
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}
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finish, err := strconv.ParseFloat(matches[1], 64)
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if err != nil {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: pct, finish: 0, speed: 0},
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fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLineStr, err)
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}
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// Get recovery speed
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matches = recoveryLineSpeedRE.FindStringSubmatch(recoveryLineStr)
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if len(matches) != 2 {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: pct, finish: finish, speed: 0},
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fmt.Errorf("unexpected recoveryLine matching speed: %s", recoveryLineStr)
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}
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speed, err := strconv.ParseFloat(matches[1], 64)
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if err != nil {
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return recoveryLine{syncedBlocks: syncedBlocks, pct: pct, finish: finish, speed: 0},
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fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLineStr, err)
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}
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return recoveryLine{syncedBlocks: syncedBlocks, pct: pct, finish: finish, speed: speed}, nil
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}
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func evalComponentDevices(deviceFields []string) string {
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mdComponentDevices := make([]string, 0)
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if len(deviceFields) > 3 {
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for _, field := range deviceFields[4:] {
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match := componentDeviceRE.FindStringSubmatch(field)
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if match == nil {
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continue
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}
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mdComponentDevices = append(mdComponentDevices, match[1])
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}
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}
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// Ensure no churn on tag ordering change
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sort.Strings(mdComponentDevices)
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return strings.Join(mdComponentDevices, ",")
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}
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func (k *MdstatConf) Gather(acc telegraf.Accumulator) error {
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data, err := k.getProcMdstat()
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if err != nil {
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return err
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}
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lines := strings.Split(string(data), "\n")
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// empty file should return nothing
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if len(lines) < 3 {
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return nil
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}
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for i, line := range lines {
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if strings.TrimSpace(line) == "" || line[0] == ' ' || strings.HasPrefix(line, "Personalities") || strings.HasPrefix(line, "unused") {
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continue
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}
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deviceFields := strings.Fields(line)
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if len(deviceFields) < 3 || len(lines) <= i+3 {
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return fmt.Errorf("not enough fields in mdline (expected at least 3): %s", line)
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}
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mdName := deviceFields[0] // mdx
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state := deviceFields[2] // active or inactive
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/*
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Failed disks have the suffix (F) & Spare disks have the suffix (S).
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Failed disks may also not be marked separately...
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*/
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fail := int64(strings.Count(line, "(F)"))
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spare := int64(strings.Count(line, "(S)"))
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sts, err := evalStatusLine(lines[i], lines[i+1])
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if err != nil {
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return fmt.Errorf("error parsing md device lines: %w", err)
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}
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syncLineIdx := i + 2
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if strings.Contains(lines[i+2], "bitmap") { // skip bitmap line
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syncLineIdx++
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}
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var rcvry recoveryLine
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// If device is syncing at the moment, get the number of currently
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// synced bytes, otherwise that number equals the size of the device.
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rcvry.syncedBlocks = sts.size
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recovering := strings.Contains(lines[syncLineIdx], "recovery")
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resyncing := strings.Contains(lines[syncLineIdx], "resync")
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checking := strings.Contains(lines[syncLineIdx], "check")
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// Append recovery and resyncing state info.
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if recovering || resyncing || checking {
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if recovering {
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state = "recovering"
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} else if checking {
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state = "checking"
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} else {
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state = "resyncing"
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}
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// Handle case when resync=PENDING or resync=DELAYED.
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if strings.Contains(lines[syncLineIdx], "PENDING") || strings.Contains(lines[syncLineIdx], "DELAYED") {
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rcvry.syncedBlocks = 0
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} else {
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var err error
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rcvry, err = evalRecoveryLine(lines[syncLineIdx])
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if err != nil {
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return fmt.Errorf("error parsing sync line in md device %q: %w", mdName, err)
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}
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}
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}
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fields := map[string]interface{}{
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"DisksActive": sts.active,
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"DisksFailed": fail,
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"DisksSpare": spare,
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"DisksTotal": sts.total,
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"DisksDown": sts.down,
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"BlocksTotal": sts.size,
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"BlocksSynced": rcvry.syncedBlocks,
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"BlocksSyncedPct": rcvry.pct,
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"BlocksSyncedFinishTime": rcvry.finish,
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"BlocksSyncedSpeed": rcvry.speed,
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}
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tags := map[string]string{
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"Name": mdName,
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"ActivityState": state,
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"Devices": evalComponentDevices(deviceFields),
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}
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acc.AddFields("mdstat", fields, tags)
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}
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return nil
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}
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func (k *MdstatConf) getProcMdstat() ([]byte, error) {
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var mdStatFile string
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if k.FileName == "" {
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mdStatFile = proc(envProc, defaultHostProc) + "/mdstat"
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} else {
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mdStatFile = k.FileName
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}
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if _, err := os.Stat(mdStatFile); os.IsNotExist(err) {
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return nil, fmt.Errorf("mdstat: %s does not exist", mdStatFile)
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} else if err != nil {
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return nil, err
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}
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data, err := ioutil.ReadFile(mdStatFile)
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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func init() {
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inputs.Add("mdstat", func() telegraf.Input { return &MdstatConf{} })
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}
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// proc can be used to read file paths from env
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func proc(env, path string) string {
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// try to read full file path
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if p := os.Getenv(env); p != "" {
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return p
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}
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// return default path
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return path
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}
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@ -0,0 +1,3 @@
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// +build !linux
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package mdstat
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@ -0,0 +1,148 @@
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// +build linux
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package mdstat
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import (
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"io/ioutil"
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"os"
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"testing"
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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/assert"
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)
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func TestFullMdstatProcFile(t *testing.T) {
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filename := makeFakeMDStatFile([]byte(mdStatFileFull))
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defer os.Remove(filename)
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k := MdstatConf{
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FileName: filename,
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}
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acc := testutil.Accumulator{}
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err := k.Gather(&acc)
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assert.NoError(t, err)
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fields := map[string]interface{}{
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"BlocksSynced": int64(10620027200),
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"BlocksSyncedFinishTime": float64(101.6),
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"BlocksSyncedPct": float64(94.3),
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"BlocksSyncedSpeed": float64(103517),
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"BlocksTotal": int64(11251451904),
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"DisksActive": int64(12),
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"DisksFailed": int64(0),
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"DisksSpare": int64(0),
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"DisksTotal": int64(12),
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"DisksDown": int64(0),
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}
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acc.AssertContainsFields(t, "mdstat", fields)
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}
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func TestFailedDiskMdStatProcFile1(t *testing.T) {
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filename := makeFakeMDStatFile([]byte(mdStatFileFailedDisk))
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defer os.Remove(filename)
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k := MdstatConf{
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FileName: filename,
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}
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acc := testutil.Accumulator{}
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err := k.Gather(&acc)
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assert.NoError(t, err)
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fields := map[string]interface{}{
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"BlocksSynced": int64(5860144128),
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"BlocksSyncedFinishTime": float64(0),
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"BlocksSyncedPct": float64(0),
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"BlocksSyncedSpeed": float64(0),
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"BlocksTotal": int64(5860144128),
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"DisksActive": int64(3),
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"DisksFailed": int64(0),
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"DisksSpare": int64(0),
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"DisksTotal": int64(4),
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"DisksDown": int64(1),
|
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}
|
||||
acc.AssertContainsFields(t, "mdstat", fields)
|
||||
}
|
||||
|
||||
func TestEmptyMdStatProcFile1(t *testing.T) {
|
||||
filename := makeFakeMDStatFile([]byte(mdStatFileEmpty))
|
||||
defer os.Remove(filename)
|
||||
|
||||
k := MdstatConf{
|
||||
FileName: filename,
|
||||
}
|
||||
|
||||
acc := testutil.Accumulator{}
|
||||
err := k.Gather(&acc)
|
||||
assert.NoError(t, err)
|
||||
}
|
||||
|
||||
func TestInvalidMdStatProcFile1(t *testing.T) {
|
||||
filename := makeFakeMDStatFile([]byte(mdStatFileInvalid))
|
||||
defer os.Remove(filename)
|
||||
|
||||
k := MdstatConf{
|
||||
FileName: filename,
|
||||
}
|
||||
|
||||
acc := testutil.Accumulator{}
|
||||
err := k.Gather(&acc)
|
||||
assert.Error(t, err)
|
||||
}
|
||||
|
||||
const mdStatFileFull = `
|
||||
Personalities : [raid1] [raid10] [linear] [multipath] [raid0] [raid6] [raid5] [raid4]
|
||||
md2 : active raid10 sde[2] sdl[9] sdf[3] sdk[8] sdh[5] sdd[1] sdg[4] sdn[11] sdm[10] sdj[7] sdc[0] sdi[6]
|
||||
11251451904 blocks super 1.2 512K chunks 2 near-copies [12/12] [UUUUUUUUUUUU]
|
||||
[==================>..] check = 94.3% (10620027200/11251451904) finish=101.6min speed=103517K/sec
|
||||
bitmap: 35/84 pages [140KB], 65536KB chunk
|
||||
|
||||
md1 : active raid1 sdb2[2] sda2[0]
|
||||
5909504 blocks super 1.2 [2/2] [UU]
|
||||
|
||||
md0 : active raid1 sdb1[2] sda1[0]
|
||||
244005888 blocks super 1.2 [2/2] [UU]
|
||||
bitmap: 1/2 pages [4KB], 65536KB chunk
|
||||
|
||||
unused devices: <none>
|
||||
`
|
||||
|
||||
const mdStatFileFailedDisk = `
|
||||
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
|
||||
md0 : active raid5 sdd1[3] sdb1[1] sda1[0]
|
||||
5860144128 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/3] [UUU_]
|
||||
bitmap: 8/15 pages [32KB], 65536KB chunk
|
||||
|
||||
unused devices: <none>
|
||||
`
|
||||
|
||||
const mdStatFileEmpty = `
|
||||
Personalities :
|
||||
unused devices: <none>
|
||||
`
|
||||
|
||||
const mdStatFileInvalid = `
|
||||
Personalities :
|
||||
|
||||
mdf1: testman actve
|
||||
|
||||
md0 : active raid1 sdb1[2] sda1[0]
|
||||
244005888 blocks super 1.2 [2/2] [UU]
|
||||
bitmap: 1/2 pages [4KB], 65536KB chunk
|
||||
|
||||
unused devices: <none>
|
||||
`
|
||||
|
||||
func makeFakeMDStatFile(content []byte) (filename string) {
|
||||
fileobj, err := ioutil.TempFile("", "mdstat")
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
if _, err = fileobj.Write(content); err != nil {
|
||||
panic(err)
|
||||
}
|
||||
if err := fileobj.Close(); err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return fileobj.Name()
|
||||
}
|
||||
Loading…
Reference in New Issue