343 lines
9.2 KiB
Go
343 lines
9.2 KiB
Go
package smart
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import (
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"fmt"
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"os/exec"
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"path"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"syscall"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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var (
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execCommand = exec.Command // execCommand is used to mock commands in tests.
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// Device Model: APPLE SSD SM256E
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modelInInfo = regexp.MustCompile("^Device Model:\\s+(.*)$")
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// Serial Number: S0X5NZBC422720
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serialInInfo = regexp.MustCompile("^Serial Number:\\s+(.*)$")
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// LU WWN Device Id: 5 002538 655584d30
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wwnInInfo = regexp.MustCompile("^LU WWN Device Id:\\s+(.*)$")
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// User Capacity: 251,000,193,024 bytes [251 GB]
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usercapacityInInfo = regexp.MustCompile("^User Capacity:\\s+([0-9,]+)\\s+bytes.*$")
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// SMART support is: Enabled
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smartEnabledInInfo = regexp.MustCompile("^SMART support is:\\s+(\\w+)$")
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// SMART overall-health self-assessment test result: PASSED
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// PASSED, FAILED, UNKNOWN
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smartOverallHealth = regexp.MustCompile("^SMART overall-health self-assessment test result:\\s+(\\w+).*$")
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// ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
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// 1 Raw_Read_Error_Rate -O-RC- 200 200 000 - 0
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// 5 Reallocated_Sector_Ct PO--CK 100 100 000 - 0
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// 192 Power-Off_Retract_Count -O--C- 097 097 000 - 14716
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attribute = regexp.MustCompile("^\\s*([0-9]+)\\s(\\S+)\\s+([-P][-O][-S][-R][-C][-K])\\s+([0-9]+)\\s+([0-9]+)\\s+([0-9]+)\\s+([-\\w]+)\\s+([\\w\\+\\.]+).*$")
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deviceFieldIds = map[string]string{
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"1": "read_error_rate",
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"7": "seek_error_rate",
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"194": "temp_c",
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"199": "udma_crc_errors",
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}
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)
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type Smart struct {
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Path string
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Nocheck string
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Attributes bool
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Excludes []string
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Devices []string
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UseSudo bool
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}
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var sampleConfig = `
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## Optionally specify the path to the smartctl executable
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# path = "/usr/bin/smartctl"
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#
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## On most platforms smartctl requires root access.
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## Setting 'use_sudo' to true will make use of sudo to run smartctl.
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## Sudo must be configured to to allow the telegraf user to run smartctl
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## with out password.
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# use_sudo = false
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#
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## Skip checking disks in this power mode. Defaults to
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## "standby" to not wake up disks that have stoped rotating.
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## See --nocheck in the man pages for smartctl.
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## smartctl version 5.41 and 5.42 have faulty detection of
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## power mode and might require changing this value to
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## "never" depending on your disks.
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# nocheck = "standby"
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#
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## Gather detailed metrics for each SMART Attribute.
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## Defaults to "false"
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##
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# attributes = false
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#
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## Optionally specify devices to exclude from reporting.
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# excludes = [ "/dev/pass6" ]
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#
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## Optionally specify devices and device type, if unset
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## a scan (smartctl --scan) for S.M.A.R.T. devices will
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## done and all found will be included except for the
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## excluded in excludes.
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# devices = [ "/dev/ada0 -d atacam" ]
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`
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func (m *Smart) SampleConfig() string {
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return sampleConfig
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}
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func (m *Smart) Description() string {
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return "Read metrics from storage devices supporting S.M.A.R.T."
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}
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func (m *Smart) Gather(acc telegraf.Accumulator) error {
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if len(m.Path) == 0 {
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return fmt.Errorf("smartctl not found: verify that smartctl is installed and that smartctl is in your PATH")
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}
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devices := m.Devices
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if len(devices) == 0 {
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var err error
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devices, err = m.scan()
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if err != nil {
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return err
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}
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}
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m.getAttributes(acc, devices)
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return nil
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}
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// Wrap with sudo
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func sudo(sudo bool, command string, args ...string) *exec.Cmd {
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if sudo {
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return execCommand("sudo", append([]string{"-n", command}, args...)...)
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}
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return execCommand(command, args...)
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}
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// Scan for S.M.A.R.T. devices
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func (m *Smart) scan() ([]string, error) {
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cmd := sudo(m.UseSudo, m.Path, "--scan")
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out, err := internal.CombinedOutputTimeout(cmd, time.Second*5)
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if err != nil {
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return []string{}, fmt.Errorf("failed to run command %s: %s - %s", strings.Join(cmd.Args, " "), err, string(out))
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}
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devices := []string{}
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for _, line := range strings.Split(string(out), "\n") {
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dev := strings.Split(line, "#")
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if len(dev) > 1 && !excludedDev(m.Excludes, strings.TrimSpace(dev[0])) {
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devices = append(devices, strings.TrimSpace(dev[0]))
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}
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}
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return devices, nil
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}
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func excludedDev(excludes []string, deviceLine string) bool {
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device := strings.Split(deviceLine, " ")
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if len(device) != 0 {
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for _, exclude := range excludes {
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if device[0] == exclude {
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return true
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}
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}
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}
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return false
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}
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// Get info and attributes for each S.M.A.R.T. device
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func (m *Smart) getAttributes(acc telegraf.Accumulator, devices []string) {
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var wg sync.WaitGroup
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wg.Add(len(devices))
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for _, device := range devices {
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go gatherDisk(acc, m.UseSudo, m.Attributes, m.Path, m.Nocheck, device, &wg)
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}
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wg.Wait()
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}
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// Command line parse errors are denoted by the exit code having the 0 bit set.
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// All other errors are drive/communication errors and should be ignored.
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func exitStatus(err error) (int, error) {
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if exiterr, ok := err.(*exec.ExitError); ok {
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if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
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return status.ExitStatus(), nil
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}
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}
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return 0, err
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}
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func gatherDisk(acc telegraf.Accumulator, usesudo, attributes bool, smartctl, nockeck, device string, wg *sync.WaitGroup) {
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defer wg.Done()
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// smartctl 5.41 & 5.42 have are broken regarding handling of --nocheck/-n
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args := []string{"--info", "--health", "--attributes", "--tolerance=verypermissive", "-n", nockeck, "--format=brief"}
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args = append(args, strings.Split(device, " ")...)
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cmd := sudo(usesudo, smartctl, args...)
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out, e := internal.CombinedOutputTimeout(cmd, time.Second*5)
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outStr := string(out)
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// Ignore all exit statuses except if it is a command line parse error
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exitStatus, er := exitStatus(e)
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if er != nil {
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acc.AddError(fmt.Errorf("failed to run command %s: %s - %s", strings.Join(cmd.Args, " "), e, outStr))
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return
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}
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device_tags := map[string]string{}
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device_node := strings.Split(device, " ")[0]
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device_tags["device"] = path.Base(device_node)
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device_fields := make(map[string]interface{})
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device_fields["exit_status"] = exitStatus
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for _, line := range strings.Split(outStr, "\n") {
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model := modelInInfo.FindStringSubmatch(line)
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if len(model) > 1 {
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device_tags["model"] = model[1]
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}
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serial := serialInInfo.FindStringSubmatch(line)
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if len(serial) > 1 {
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device_tags["serial_no"] = serial[1]
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}
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wwn := wwnInInfo.FindStringSubmatch(line)
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if len(wwn) > 1 {
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device_tags["wwn"] = strings.Replace(wwn[1], " ", "", -1)
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}
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capacity := usercapacityInInfo.FindStringSubmatch(line)
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if len(capacity) > 1 {
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device_tags["capacity"] = strings.Replace(capacity[1], ",", "", -1)
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}
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enabled := smartEnabledInInfo.FindStringSubmatch(line)
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if len(enabled) > 1 {
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device_tags["enabled"] = enabled[1]
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}
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health := smartOverallHealth.FindStringSubmatch(line)
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if len(health) > 1 {
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device_fields["health_ok"] = (health[1] == "PASSED")
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}
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attr := attribute.FindStringSubmatch(line)
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if len(attr) > 1 {
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if attributes {
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tags := map[string]string{}
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fields := make(map[string]interface{})
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device_node := strings.Split(device, " ")[0]
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tags["device"] = path.Base(device_node)
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if serial, ok := device_tags["serial_no"]; ok {
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tags["serial_no"] = serial
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}
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if wwn, ok := device_tags["wwn"]; ok {
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tags["wwn"] = wwn
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}
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tags["id"] = attr[1]
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tags["name"] = attr[2]
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tags["flags"] = attr[3]
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fields["exit_status"] = exitStatus
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if i, err := strconv.ParseInt(attr[4], 10, 64); err == nil {
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fields["value"] = i
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}
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if i, err := strconv.ParseInt(attr[5], 10, 64); err == nil {
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fields["worst"] = i
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}
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if i, err := strconv.ParseInt(attr[6], 10, 64); err == nil {
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fields["threshold"] = i
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}
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tags["fail"] = attr[7]
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if val, err := parseRawValue(attr[8]); err == nil {
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fields["raw_value"] = val
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}
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acc.AddFields("smart_attribute", fields, tags)
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}
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// If the attribute matches on the one in deviceFieldIds
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// save the raw value to a field.
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if field, ok := deviceFieldIds[attr[1]]; ok {
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if val, err := parseRawValue(attr[8]); err == nil {
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device_fields[field] = val
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}
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}
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}
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}
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acc.AddFields("smart_device", device_fields, device_tags)
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}
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func parseRawValue(rawVal string) (int64, error) {
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// Integer
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if i, err := strconv.ParseInt(rawVal, 10, 64); err == nil {
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return i, nil
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}
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// Duration: 65h+33m+09.259s
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unit := regexp.MustCompile("^(.*)([hms])$")
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parts := strings.Split(rawVal, "+")
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if len(parts) == 0 {
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return 0, fmt.Errorf("Couldn't parse RAW_VALUE '%s'", rawVal)
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}
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duration := int64(0)
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for _, part := range parts {
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timePart := unit.FindStringSubmatch(part)
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if len(timePart) == 0 {
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continue
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}
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switch timePart[2] {
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case "h":
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duration += parseInt(timePart[1]) * int64(3600)
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case "m":
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duration += parseInt(timePart[1]) * int64(60)
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case "s":
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// drop fractions of seconds
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duration += parseInt(strings.Split(timePart[1], ".")[0])
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default:
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// Unknown, ignore
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}
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}
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return duration, nil
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}
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func parseInt(str string) int64 {
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if i, err := strconv.ParseInt(str, 10, 64); err == nil {
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return i
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}
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return 0
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}
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func init() {
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m := Smart{}
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path, _ := exec.LookPath("smartctl")
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if len(path) > 0 {
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m.Path = path
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}
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m.Nocheck = "standby"
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inputs.Add("smart", func() telegraf.Input {
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return &m
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})
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}
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