You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
294 lines
8.2 KiB
294 lines
8.2 KiB
// 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.
|
|
|
|
//go:build !nozfs
|
|
// +build !nozfs
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/go-kit/log/level"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// constants from https://github.com/zfsonlinux/zfs/blob/master/lib/libspl/include/sys/kstat.h
|
|
// kept as strings for comparison thus avoiding conversion to int
|
|
const (
|
|
// kstatDataChar = "0"
|
|
// kstatDataInt32 = "1"
|
|
// kstatDataUint32 = "2"
|
|
kstatDataInt64 = "3"
|
|
kstatDataUint64 = "4"
|
|
// kstatDataLong = "5"
|
|
// kstatDataUlong = "6"
|
|
// kstatDataString = "7"
|
|
)
|
|
|
|
var zfsPoolStatesName = []string{"online", "degraded", "faulted", "offline", "removed", "unavail", "suspended"}
|
|
|
|
func (c *zfsCollector) openProcFile(path string) (*os.File, error) {
|
|
file, err := os.Open(procFilePath(path))
|
|
if err != nil {
|
|
// file not found error can occur if:
|
|
// 1. zfs module is not loaded
|
|
// 2. zfs version does not have the feature with metrics -- ok to ignore
|
|
level.Debug(c.logger).Log("msg", "Cannot open file for reading", "path", procFilePath(path))
|
|
return nil, errZFSNotAvailable
|
|
}
|
|
return file, nil
|
|
}
|
|
|
|
func (c *zfsCollector) updateZfsStats(subsystem string, ch chan<- prometheus.Metric) error {
|
|
file, err := c.openProcFile(filepath.Join(c.linuxProcpathBase, c.linuxPathMap[subsystem]))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer file.Close()
|
|
|
|
return c.parseProcfsFile(file, c.linuxPathMap[subsystem], func(s zfsSysctl, v uint64) {
|
|
ch <- c.constSysctlMetric(subsystem, s, v)
|
|
})
|
|
}
|
|
|
|
func (c *zfsCollector) updatePoolStats(ch chan<- prometheus.Metric) error {
|
|
zpoolPaths, err := filepath.Glob(procFilePath(filepath.Join(c.linuxProcpathBase, c.linuxZpoolIoPath)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, zpoolPath := range zpoolPaths {
|
|
file, err := os.Open(zpoolPath)
|
|
if err != nil {
|
|
// this file should exist, but there is a race where an exporting pool can remove the files -- ok to ignore
|
|
level.Debug(c.logger).Log("msg", "Cannot open file for reading", "path", zpoolPath)
|
|
return errZFSNotAvailable
|
|
}
|
|
|
|
err = c.parsePoolProcfsFile(file, zpoolPath, func(poolName string, s zfsSysctl, v uint64) {
|
|
ch <- c.constPoolMetric(poolName, s, v)
|
|
})
|
|
file.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
zpoolObjsetPaths, err := filepath.Glob(procFilePath(filepath.Join(c.linuxProcpathBase, c.linuxZpoolObjsetPath)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, zpoolPath := range zpoolObjsetPaths {
|
|
file, err := os.Open(zpoolPath)
|
|
if err != nil {
|
|
// This file should exist, but there is a race where an exporting pool can remove the files. Ok to ignore.
|
|
level.Debug(c.logger).Log("msg", "Cannot open file for reading", "path", zpoolPath)
|
|
return errZFSNotAvailable
|
|
}
|
|
|
|
err = c.parsePoolObjsetFile(file, zpoolPath, func(poolName string, datasetName string, s zfsSysctl, v uint64) {
|
|
ch <- c.constPoolObjsetMetric(poolName, datasetName, s, v)
|
|
})
|
|
file.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
zpoolStatePaths, err := filepath.Glob(procFilePath(filepath.Join(c.linuxProcpathBase, c.linuxZpoolStatePath)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if zpoolStatePaths == nil {
|
|
level.Debug(c.logger).Log("msg", "No pool state files found")
|
|
return nil
|
|
}
|
|
|
|
for _, zpoolPath := range zpoolStatePaths {
|
|
file, err := os.Open(zpoolPath)
|
|
if err != nil {
|
|
// This file should exist, but there is a race where an exporting pool can remove the files. Ok to ignore.
|
|
level.Debug(c.logger).Log("msg", "Cannot open file for reading", "path", zpoolPath)
|
|
return errZFSNotAvailable
|
|
}
|
|
|
|
err = c.parsePoolStateFile(file, zpoolPath, func(poolName string, stateName string, isActive uint64) {
|
|
ch <- c.constPoolStateMetric(poolName, stateName, isActive)
|
|
})
|
|
|
|
file.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *zfsCollector) parseProcfsFile(reader io.Reader, fmtExt string, handler func(zfsSysctl, uint64)) error {
|
|
scanner := bufio.NewScanner(reader)
|
|
|
|
parseLine := false
|
|
for scanner.Scan() {
|
|
parts := strings.Fields(scanner.Text())
|
|
|
|
if !parseLine && len(parts) == 3 && parts[0] == "name" && parts[1] == "type" && parts[2] == "data" {
|
|
// Start parsing from here.
|
|
parseLine = true
|
|
continue
|
|
}
|
|
|
|
if !parseLine || len(parts) < 3 {
|
|
continue
|
|
}
|
|
|
|
// kstat data type (column 2) should be KSTAT_DATA_UINT64, otherwise ignore
|
|
// TODO: when other KSTAT_DATA_* types arrive, much of this will need to be restructured
|
|
if parts[1] == kstatDataUint64 || parts[1] == kstatDataInt64 {
|
|
key := fmt.Sprintf("kstat.zfs.misc.%s.%s", fmtExt, parts[0])
|
|
value, err := strconv.ParseUint(parts[2], 10, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("could not parse expected integer value for %q", key)
|
|
}
|
|
handler(zfsSysctl(key), value)
|
|
}
|
|
}
|
|
if !parseLine {
|
|
return fmt.Errorf("did not parse a single %q metric", fmtExt)
|
|
}
|
|
|
|
return scanner.Err()
|
|
}
|
|
|
|
func (c *zfsCollector) parsePoolProcfsFile(reader io.Reader, zpoolPath string, handler func(string, zfsSysctl, uint64)) error {
|
|
scanner := bufio.NewScanner(reader)
|
|
|
|
parseLine := false
|
|
var fields []string
|
|
for scanner.Scan() {
|
|
line := strings.Fields(scanner.Text())
|
|
|
|
if !parseLine && len(line) >= 12 && line[0] == "nread" {
|
|
//Start parsing from here.
|
|
parseLine = true
|
|
fields = make([]string, len(line))
|
|
copy(fields, line)
|
|
continue
|
|
}
|
|
if !parseLine {
|
|
continue
|
|
}
|
|
|
|
zpoolPathElements := strings.Split(zpoolPath, "/")
|
|
pathLen := len(zpoolPathElements)
|
|
if pathLen < 2 {
|
|
return fmt.Errorf("zpool path did not return at least two elements")
|
|
}
|
|
zpoolName := zpoolPathElements[pathLen-2]
|
|
zpoolFile := zpoolPathElements[pathLen-1]
|
|
|
|
for i, field := range fields {
|
|
key := fmt.Sprintf("kstat.zfs.misc.%s.%s", zpoolFile, field)
|
|
|
|
value, err := strconv.ParseUint(line[i], 10, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("could not parse expected integer value for %q: %w", key, err)
|
|
}
|
|
handler(zpoolName, zfsSysctl(key), value)
|
|
}
|
|
}
|
|
|
|
return scanner.Err()
|
|
}
|
|
|
|
func (c *zfsCollector) parsePoolObjsetFile(reader io.Reader, zpoolPath string, handler func(string, string, zfsSysctl, uint64)) error {
|
|
scanner := bufio.NewScanner(reader)
|
|
|
|
parseLine := false
|
|
var zpoolName, datasetName string
|
|
for scanner.Scan() {
|
|
parts := strings.Fields(scanner.Text())
|
|
|
|
if !parseLine && len(parts) == 3 && parts[0] == "name" && parts[1] == "type" && parts[2] == "data" {
|
|
parseLine = true
|
|
continue
|
|
}
|
|
|
|
if !parseLine || len(parts) < 3 {
|
|
continue
|
|
}
|
|
if parts[0] == "dataset_name" {
|
|
zpoolPathElements := strings.Split(zpoolPath, "/")
|
|
pathLen := len(zpoolPathElements)
|
|
zpoolName = zpoolPathElements[pathLen-2]
|
|
datasetName = parts[2]
|
|
continue
|
|
}
|
|
|
|
if parts[1] == kstatDataUint64 {
|
|
key := fmt.Sprintf("kstat.zfs.misc.objset.%s", parts[0])
|
|
value, err := strconv.ParseUint(parts[2], 10, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("could not parse expected integer value for %q", key)
|
|
}
|
|
handler(zpoolName, datasetName, zfsSysctl(key), value)
|
|
}
|
|
}
|
|
if !parseLine {
|
|
return fmt.Errorf("did not parse a single %s %s metric", zpoolName, datasetName)
|
|
}
|
|
|
|
return scanner.Err()
|
|
}
|
|
|
|
func (c *zfsCollector) parsePoolStateFile(reader io.Reader, zpoolPath string, handler func(string, string, uint64)) error {
|
|
scanner := bufio.NewScanner(reader)
|
|
scanner.Scan()
|
|
|
|
actualStateName, err := scanner.Text(), scanner.Err()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
actualStateName = strings.ToLower(actualStateName)
|
|
|
|
zpoolPathElements := strings.Split(zpoolPath, "/")
|
|
pathLen := len(zpoolPathElements)
|
|
if pathLen < 2 {
|
|
return fmt.Errorf("zpool path did not return at least two elements")
|
|
}
|
|
|
|
zpoolName := zpoolPathElements[pathLen-2]
|
|
|
|
for _, stateName := range zfsPoolStatesName {
|
|
isActive := uint64(0)
|
|
|
|
if actualStateName == stateName {
|
|
isActive = 1
|
|
}
|
|
|
|
handler(zpoolName, stateName, isActive)
|
|
}
|
|
|
|
return nil
|
|
}
|