mirror of
https://github.com/henrygd/beszel.git
synced 2025-12-17 02:36:17 +01:00
539 lines
18 KiB
Go
539 lines
18 KiB
Go
package agent
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import (
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"context"
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"encoding/json"
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/henrygd/beszel/internal/entities/smart"
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"golang.org/x/exp/slog"
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)
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// SmartManager manages data collection for SMART devices
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type SmartManager struct {
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sync.Mutex
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SmartDataMap map[string]*smart.SmartData
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SmartDevices []*DeviceInfo
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refreshMutex sync.Mutex
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}
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type scanOutput struct {
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Devices []struct {
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Name string `json:"name"`
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Type string `json:"type"`
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InfoName string `json:"info_name"`
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Protocol string `json:"protocol"`
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} `json:"devices"`
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}
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type DeviceInfo struct {
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Name string `json:"name"`
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Type string `json:"type"`
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InfoName string `json:"info_name"`
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Protocol string `json:"protocol"`
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}
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var errNoValidSmartData = fmt.Errorf("no valid SMART data found") // Error for missing data
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// Refresh updates SMART data for all known devices on demand.
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func (sm *SmartManager) Refresh() error {
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sm.refreshMutex.Lock()
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defer sm.refreshMutex.Unlock()
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scanErr := sm.ScanDevices()
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if scanErr != nil {
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slog.Debug("smartctl scan failed", "err", scanErr)
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}
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devices := sm.devicesSnapshot()
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var collectErr error
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for _, deviceInfo := range devices {
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if deviceInfo == nil {
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continue
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}
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if err := sm.CollectSmart(deviceInfo); err != nil {
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slog.Debug("smartctl collect failed, skipping", "device", deviceInfo.Name, "err", err)
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collectErr = err
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}
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}
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return sm.resolveRefreshError(scanErr, collectErr)
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}
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// devicesSnapshot returns a copy of the current device slice to avoid iterating
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// while holding the primary mutex for longer than necessary.
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func (sm *SmartManager) devicesSnapshot() []*DeviceInfo {
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sm.Lock()
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defer sm.Unlock()
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devices := make([]*DeviceInfo, len(sm.SmartDevices))
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copy(devices, sm.SmartDevices)
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return devices
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}
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// hasSmartData reports whether any SMART data has been collected.
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// func (sm *SmartManager) hasSmartData() bool {
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// sm.Lock()
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// defer sm.Unlock()
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// return len(sm.SmartDataMap) > 0
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// }
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// resolveRefreshError determines the proper error to return after a refresh.
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func (sm *SmartManager) resolveRefreshError(scanErr, collectErr error) error {
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sm.Lock()
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noDevices := len(sm.SmartDevices) == 0
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noData := len(sm.SmartDataMap) == 0
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sm.Unlock()
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if noDevices {
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if scanErr != nil {
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return scanErr
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}
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}
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if !noData {
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return nil
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}
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if collectErr != nil {
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return collectErr
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}
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if scanErr != nil {
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return scanErr
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}
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return errNoValidSmartData
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}
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// GetCurrentData returns the current SMART data
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func (sm *SmartManager) GetCurrentData() map[string]smart.SmartData {
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sm.Lock()
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defer sm.Unlock()
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result := make(map[string]smart.SmartData, len(sm.SmartDataMap))
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for key, value := range sm.SmartDataMap {
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if value != nil {
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result[key] = *value
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}
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}
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return result
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}
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// ScanDevices scans for SMART devices
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// Scan devices using `smartctl --scan -j`
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// If scan fails, return error
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// If scan succeeds, parse the output and update the SmartDevices slice
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func (sm *SmartManager) ScanDevices() error {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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cmd := exec.CommandContext(ctx, "smartctl", "--scan", "-j")
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output, err := cmd.Output()
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if err != nil {
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return err
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}
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hasValidData := sm.parseScan(output)
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if !hasValidData {
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return errNoValidSmartData
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}
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return nil
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}
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// CollectSmart collects SMART data for a device
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// Collect data using `smartctl -d <type> -aj /dev/<device>` when device type is known
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// Always attempts to parse output even if command fails, as some data may still be available
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// If collect fails, return error
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// If collect succeeds, parse the output and update the SmartDataMap
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// Uses -n standby to avoid waking up sleeping disks, but bypasses standby mode
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// for initial data collection when no cached data exists
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func (sm *SmartManager) CollectSmart(deviceInfo *DeviceInfo) error {
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// Check if we have any existing data for this device
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hasExistingData := sm.hasDataForDevice(deviceInfo.Name)
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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// Try with -n standby first if we have existing data
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args := sm.smartctlArgs(deviceInfo, true)
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cmd := exec.CommandContext(ctx, "smartctl", args...)
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output, err := cmd.CombinedOutput()
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// Check if device is in standby (exit status 2)
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if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 2 {
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if hasExistingData {
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// Device is in standby and we have cached data, keep using cache
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slog.Debug("device in standby mode, using cached data", "device", deviceInfo.Name)
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return nil
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}
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// No cached data, need to collect initial data by bypassing standby
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slog.Debug("device in standby but no cached data, collecting initial data", "device", deviceInfo.Name)
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ctx2, cancel2 := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel2()
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args = sm.smartctlArgs(deviceInfo, false)
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cmd = exec.CommandContext(ctx2, "smartctl", args...)
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output, err = cmd.CombinedOutput()
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}
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hasValidData := false
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switch deviceInfo.Type {
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case "scsi":
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hasValidData, _ = sm.parseSmartForScsi(output)
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case "sat", "ata":
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hasValidData, _ = sm.parseSmartForSata(output)
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case "nvme", "sntasmedia":
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hasValidData, _ = sm.parseSmartForNvme(output)
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}
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if !hasValidData {
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if err != nil {
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return err
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}
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return errNoValidSmartData
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}
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return nil
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}
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// smartctlArgs returns the arguments for the smartctl command
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// based on the device type and whether to include standby mode
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func (sm *SmartManager) smartctlArgs(deviceInfo *DeviceInfo, includeStandby bool) []string {
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args := make([]string, 0, 7)
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if deviceInfo != nil && deviceInfo.Type != "" {
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args = append(args, "-d", deviceInfo.Type)
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}
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args = append(args, "-aj")
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if includeStandby {
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args = append(args, "-n", "standby")
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}
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if deviceInfo != nil {
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args = append(args, deviceInfo.Name)
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}
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return args
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}
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// hasDataForDevice checks if we have cached SMART data for a specific device
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func (sm *SmartManager) hasDataForDevice(deviceName string) bool {
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sm.Lock()
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defer sm.Unlock()
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// Check if any cached data has this device name
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for _, data := range sm.SmartDataMap {
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if data != nil && data.DiskName == deviceName {
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return true
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}
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}
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return false
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}
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// parseScan parses the output of smartctl --scan -j and updates the SmartDevices slice
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func (sm *SmartManager) parseScan(output []byte) bool {
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sm.Lock()
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defer sm.Unlock()
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sm.SmartDevices = make([]*DeviceInfo, 0)
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scan := &scanOutput{}
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if err := json.Unmarshal(output, scan); err != nil {
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slog.Debug("Failed to parse smartctl scan JSON", "err", err)
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return false
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}
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if len(scan.Devices) == 0 {
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return false
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}
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scannedDeviceNameMap := make(map[string]bool, len(scan.Devices))
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for _, device := range scan.Devices {
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deviceInfo := &DeviceInfo{
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Name: device.Name,
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Type: device.Type,
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InfoName: device.InfoName,
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Protocol: device.Protocol,
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}
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sm.SmartDevices = append(sm.SmartDevices, deviceInfo)
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scannedDeviceNameMap[device.Name] = true
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}
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// remove devices that are not in the scan
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for key := range sm.SmartDataMap {
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if _, ok := scannedDeviceNameMap[key]; !ok {
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delete(sm.SmartDataMap, key)
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}
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}
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return true
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}
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// isVirtualDevice checks if a device is a virtual disk that should be filtered out
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func (sm *SmartManager) isVirtualDevice(data *smart.SmartInfoForSata) bool {
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vendorUpper := strings.ToUpper(data.ScsiVendor)
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productUpper := strings.ToUpper(data.ScsiProduct)
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modelUpper := strings.ToUpper(data.ModelName)
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switch {
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case strings.Contains(vendorUpper, "IET"), // iSCSI Enterprise Target
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strings.Contains(productUpper, "VIRTUAL"),
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strings.Contains(productUpper, "QEMU"),
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strings.Contains(productUpper, "VBOX"),
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strings.Contains(productUpper, "VMWARE"),
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strings.Contains(vendorUpper, "MSFT"), // Microsoft Hyper-V
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strings.Contains(modelUpper, "VIRTUAL"),
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strings.Contains(modelUpper, "QEMU"),
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strings.Contains(modelUpper, "VBOX"),
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strings.Contains(modelUpper, "VMWARE"):
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return true
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default:
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return false
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}
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}
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// parseSmartForSata parses the output of smartctl --all -j for SATA/ATA devices and updates the SmartDataMap
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// Returns hasValidData and exitStatus
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func (sm *SmartManager) parseSmartForSata(output []byte) (bool, int) {
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var data smart.SmartInfoForSata
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if err := json.Unmarshal(output, &data); err != nil {
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return false, 0
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}
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if data.SerialNumber == "" {
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slog.Debug("device has no serial number, skipping", "device", data.Device.Name)
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return false, data.Smartctl.ExitStatus
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}
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// Skip virtual devices (e.g., Kubernetes PVCs, QEMU, VirtualBox, etc.)
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if sm.isVirtualDevice(&data) {
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slog.Debug("skipping virtual device", "device", data.Device.Name, "model", data.ModelName)
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return false, data.Smartctl.ExitStatus
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}
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sm.Lock()
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defer sm.Unlock()
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// get device name (e.g. /dev/sda)
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keyName := data.SerialNumber
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// if device does not exist in SmartDataMap, initialize it
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if _, ok := sm.SmartDataMap[keyName]; !ok {
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sm.SmartDataMap[keyName] = &smart.SmartData{}
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}
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// update SmartData
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smartData := sm.SmartDataMap[keyName]
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// smartData.ModelFamily = data.ModelFamily
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smartData.ModelName = data.ModelName
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smartData.SerialNumber = data.SerialNumber
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smartData.FirmwareVersion = data.FirmwareVersion
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smartData.Capacity = data.UserCapacity.Bytes
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smartData.Temperature = data.Temperature.Current
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smartData.SmartStatus = getSmartStatus(smartData.Temperature, data.SmartStatus.Passed)
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smartData.DiskName = data.Device.Name
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smartData.DiskType = data.Device.Type
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// update SmartAttributes
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smartData.Attributes = make([]*smart.SmartAttribute, 0, len(data.AtaSmartAttributes.Table))
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for _, attr := range data.AtaSmartAttributes.Table {
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smartAttr := &smart.SmartAttribute{
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ID: attr.ID,
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Name: attr.Name,
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Value: attr.Value,
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Worst: attr.Worst,
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Threshold: attr.Thresh,
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RawValue: attr.Raw.Value,
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RawString: attr.Raw.String,
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WhenFailed: attr.WhenFailed,
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}
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smartData.Attributes = append(smartData.Attributes, smartAttr)
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}
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sm.SmartDataMap[keyName] = smartData
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return true, data.Smartctl.ExitStatus
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}
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func getSmartStatus(temperature uint8, passed bool) string {
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if passed {
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return "PASSED"
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} else if temperature > 0 {
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return "FAILED"
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} else {
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return "UNKNOWN"
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}
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}
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func (sm *SmartManager) parseSmartForScsi(output []byte) (bool, int) {
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var data smart.SmartInfoForScsi
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if err := json.Unmarshal(output, &data); err != nil {
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return false, 0
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}
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if data.SerialNumber == "" {
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slog.Debug("scsi device has no serial number, skipping", "device", data.Device.Name)
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return false, data.Smartctl.ExitStatus
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}
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sm.Lock()
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defer sm.Unlock()
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keyName := data.SerialNumber
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if _, ok := sm.SmartDataMap[keyName]; !ok {
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sm.SmartDataMap[keyName] = &smart.SmartData{}
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}
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smartData := sm.SmartDataMap[keyName]
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smartData.ModelName = data.ScsiModelName
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smartData.SerialNumber = data.SerialNumber
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smartData.FirmwareVersion = data.ScsiRevision
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smartData.Capacity = data.UserCapacity.Bytes
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smartData.Temperature = data.Temperature.Current
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smartData.SmartStatus = getSmartStatus(smartData.Temperature, data.SmartStatus.Passed)
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smartData.DiskName = data.Device.Name
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smartData.DiskType = data.Device.Type
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attributes := make([]*smart.SmartAttribute, 0, 10)
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attributes = append(attributes, &smart.SmartAttribute{Name: "PowerOnHours", RawValue: data.PowerOnTime.Hours})
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attributes = append(attributes, &smart.SmartAttribute{Name: "PowerOnMinutes", RawValue: data.PowerOnTime.Minutes})
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attributes = append(attributes, &smart.SmartAttribute{Name: "GrownDefectList", RawValue: data.ScsiGrownDefectList})
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attributes = append(attributes, &smart.SmartAttribute{Name: "StartStopCycles", RawValue: data.ScsiStartStopCycleCounter.AccumulatedStartStopCycles})
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attributes = append(attributes, &smart.SmartAttribute{Name: "LoadUnloadCycles", RawValue: data.ScsiStartStopCycleCounter.AccumulatedLoadUnloadCycles})
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attributes = append(attributes, &smart.SmartAttribute{Name: "StartStopSpecified", RawValue: data.ScsiStartStopCycleCounter.SpecifiedCycleCountOverDeviceLifetime})
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attributes = append(attributes, &smart.SmartAttribute{Name: "LoadUnloadSpecified", RawValue: data.ScsiStartStopCycleCounter.SpecifiedLoadUnloadCountOverDeviceLifetime})
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readStats := data.ScsiErrorCounterLog.Read
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writeStats := data.ScsiErrorCounterLog.Write
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verifyStats := data.ScsiErrorCounterLog.Verify
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attributes = append(attributes, &smart.SmartAttribute{Name: "ReadTotalErrorsCorrected", RawValue: readStats.TotalErrorsCorrected})
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attributes = append(attributes, &smart.SmartAttribute{Name: "ReadTotalUncorrectedErrors", RawValue: readStats.TotalUncorrectedErrors})
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attributes = append(attributes, &smart.SmartAttribute{Name: "ReadCorrectionAlgorithmInvocations", RawValue: readStats.CorrectionAlgorithmInvocations})
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if val := parseScsiGigabytesProcessed(readStats.GigabytesProcessed); val >= 0 {
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attributes = append(attributes, &smart.SmartAttribute{Name: "ReadGigabytesProcessed", RawValue: uint64(val)})
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}
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attributes = append(attributes, &smart.SmartAttribute{Name: "WriteTotalErrorsCorrected", RawValue: writeStats.TotalErrorsCorrected})
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attributes = append(attributes, &smart.SmartAttribute{Name: "WriteTotalUncorrectedErrors", RawValue: writeStats.TotalUncorrectedErrors})
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attributes = append(attributes, &smart.SmartAttribute{Name: "WriteCorrectionAlgorithmInvocations", RawValue: writeStats.CorrectionAlgorithmInvocations})
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if val := parseScsiGigabytesProcessed(writeStats.GigabytesProcessed); val >= 0 {
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attributes = append(attributes, &smart.SmartAttribute{Name: "WriteGigabytesProcessed", RawValue: uint64(val)})
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}
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attributes = append(attributes, &smart.SmartAttribute{Name: "VerifyTotalErrorsCorrected", RawValue: verifyStats.TotalErrorsCorrected})
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attributes = append(attributes, &smart.SmartAttribute{Name: "VerifyTotalUncorrectedErrors", RawValue: verifyStats.TotalUncorrectedErrors})
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attributes = append(attributes, &smart.SmartAttribute{Name: "VerifyCorrectionAlgorithmInvocations", RawValue: verifyStats.CorrectionAlgorithmInvocations})
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if val := parseScsiGigabytesProcessed(verifyStats.GigabytesProcessed); val >= 0 {
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attributes = append(attributes, &smart.SmartAttribute{Name: "VerifyGigabytesProcessed", RawValue: uint64(val)})
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}
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smartData.Attributes = attributes
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sm.SmartDataMap[keyName] = smartData
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return true, data.Smartctl.ExitStatus
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}
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func parseScsiGigabytesProcessed(value string) int64 {
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if value == "" {
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return -1
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}
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normalized := strings.ReplaceAll(value, ",", "")
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parsed, err := strconv.ParseInt(normalized, 10, 64)
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if err != nil {
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slog.Debug("failed to parse SCSI gigabytes processed", "value", value, "err", err)
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return -1
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}
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return parsed
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}
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// parseSmartForNvme parses the output of smartctl --all -j /dev/nvmeX and updates the SmartDataMap
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// Returns hasValidData and exitStatus
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func (sm *SmartManager) parseSmartForNvme(output []byte) (bool, int) {
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data := &smart.SmartInfoForNvme{}
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if err := json.Unmarshal(output, &data); err != nil {
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return false, 0
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}
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if data.SerialNumber == "" {
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slog.Debug("device has no serial number, skipping", "device", data.Device.Name)
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return false, data.Smartctl.ExitStatus
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}
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sm.Lock()
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defer sm.Unlock()
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// get device name (e.g. /dev/nvme0)
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keyName := data.SerialNumber
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// if device does not exist in SmartDataMap, initialize it
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if _, ok := sm.SmartDataMap[keyName]; !ok {
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sm.SmartDataMap[keyName] = &smart.SmartData{}
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}
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// update SmartData
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smartData := sm.SmartDataMap[keyName]
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smartData.ModelName = data.ModelName
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smartData.SerialNumber = data.SerialNumber
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smartData.FirmwareVersion = data.FirmwareVersion
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smartData.Capacity = data.UserCapacity.Bytes
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smartData.Temperature = data.NVMeSmartHealthInformationLog.Temperature
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smartData.SmartStatus = getSmartStatus(smartData.Temperature, data.SmartStatus.Passed)
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smartData.DiskName = data.Device.Name
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smartData.DiskType = data.Device.Type
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// nvme attributes does not follow the same format as ata attributes,
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// so we manually map each field to SmartAttributes
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log := data.NVMeSmartHealthInformationLog
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smartData.Attributes = []*smart.SmartAttribute{
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{Name: "CriticalWarning", RawValue: uint64(log.CriticalWarning)},
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{Name: "Temperature", RawValue: uint64(log.Temperature)},
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{Name: "AvailableSpare", RawValue: uint64(log.AvailableSpare)},
|
|
{Name: "AvailableSpareThreshold", RawValue: uint64(log.AvailableSpareThreshold)},
|
|
{Name: "PercentageUsed", RawValue: uint64(log.PercentageUsed)},
|
|
{Name: "DataUnitsRead", RawValue: log.DataUnitsRead},
|
|
{Name: "DataUnitsWritten", RawValue: log.DataUnitsWritten},
|
|
{Name: "HostReads", RawValue: uint64(log.HostReads)},
|
|
{Name: "HostWrites", RawValue: uint64(log.HostWrites)},
|
|
{Name: "ControllerBusyTime", RawValue: uint64(log.ControllerBusyTime)},
|
|
{Name: "PowerCycles", RawValue: uint64(log.PowerCycles)},
|
|
{Name: "PowerOnHours", RawValue: uint64(log.PowerOnHours)},
|
|
{Name: "UnsafeShutdowns", RawValue: uint64(log.UnsafeShutdowns)},
|
|
{Name: "MediaErrors", RawValue: uint64(log.MediaErrors)},
|
|
{Name: "NumErrLogEntries", RawValue: uint64(log.NumErrLogEntries)},
|
|
{Name: "WarningTempTime", RawValue: uint64(log.WarningTempTime)},
|
|
{Name: "CriticalCompTime", RawValue: uint64(log.CriticalCompTime)},
|
|
}
|
|
|
|
sm.SmartDataMap[keyName] = smartData
|
|
|
|
return true, data.Smartctl.ExitStatus
|
|
}
|
|
|
|
// detectSmartctl checks if smartctl is installed, returns an error if not
|
|
func (sm *SmartManager) detectSmartctl() error {
|
|
if _, err := exec.LookPath("smartctl"); err == nil {
|
|
return nil
|
|
}
|
|
return fmt.Errorf("smartctl not found")
|
|
}
|
|
|
|
// NewSmartManager creates and initializes a new SmartManager
|
|
func NewSmartManager() (*SmartManager, error) {
|
|
sm := &SmartManager{
|
|
SmartDataMap: make(map[string]*smart.SmartData),
|
|
}
|
|
if err := sm.detectSmartctl(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return sm, nil
|
|
}
|