Add comprehensive alert system reliability improvements
This commit implements critical reliability features to prevent data loss and improve alert system robustness: **Persistent Notification Queue:** - SQLite-backed queue with WAL journaling for crash recovery - Dead Letter Queue (DLQ) for notifications that exhaust retries - Exponential backoff retry logic (100ms → 200ms → 400ms) - Full audit trail for all notification delivery attempts - New file: internal/notifications/queue.go (661 lines) **DLQ Management API:** - GET /api/notifications/dlq - Retrieve DLQ items - GET /api/notifications/queue/stats - Queue statistics - POST /api/notifications/dlq/retry - Retry failed notifications - POST /api/notifications/dlq/delete - Delete DLQ items - New file: internal/api/notification_queue.go (145 lines) **Prometheus Metrics:** - 18 comprehensive metrics for alerts and notifications - Metric hooks integrated via function pointers to avoid import cycles - /metrics endpoint exposed for Prometheus scraping - New file: internal/metrics/alert_metrics.go (193 lines) **Alert History Reliability:** - Exponential backoff retry for history saves (3 attempts) - Automatic backup restoration on write failure - Modified: internal/alerts/history.go **Flapping Detection:** - Detects and suppresses rapidly oscillating alerts - Configurable window (default: 5 minutes) - Configurable threshold (default: 5 state changes) - Configurable cooldown (default: 15 minutes) - Automatic cleanup of inactive flapping history **Alert TTL & Auto-Cleanup:** - MaxAlertAgeDays: Auto-cleanup old alerts (default: 7 days) - MaxAcknowledgedAgeDays: Faster cleanup for acked alerts (default: 1 day) - AutoAcknowledgeAfterHours: Auto-ack long-running alerts (default: 24 hours) - Prevents memory leaks from long-running alerts **WebSocket Broadcast Sequencer:** - Channel-based sequencing ensures ordered message delivery - 100ms coalescing window for rapid state updates - Prevents race conditions in WebSocket broadcasts - Modified: internal/websocket/hub.go **Configuration Fields Added:** - FlappingEnabled, FlappingWindowSeconds, FlappingThreshold, FlappingCooldownMinutes - MaxAlertAgeDays, MaxAcknowledgedAgeDays, AutoAcknowledgeAfterHours All features are production-ready and build successfully.
This commit is contained in:
rcourtman
parent
47748230f4
commit
c8e0281953
6 changed files with 1341 additions and 16 deletions
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@ -365,6 +365,15 @@ type AlertConfig struct {
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TimeThreshold int `json:"timeThreshold"` // Legacy: Seconds that threshold must be exceeded before triggering
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TimeThresholds map[string]int `json:"timeThresholds"` // Per-type delays: guest, node, storage, pbs
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MetricTimeThresholds map[string]map[string]int `json:"metricTimeThresholds"` // Optional per-metric delays keyed by resource type
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// Alert TTL and auto-cleanup
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MaxAlertAgeDays int `json:"maxAlertAgeDays"` // Maximum age for alerts before auto-cleanup (0 = disabled)
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MaxAcknowledgedAgeDays int `json:"maxAcknowledgedAgeDays"` // Maximum age for acknowledged alerts (0 = disabled)
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AutoAcknowledgeAfterHours int `json:"autoAcknowledgeAfterHours"` // Auto-acknowledge alerts after X hours (0 = disabled)
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// Flapping detection
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FlappingEnabled bool `json:"flappingEnabled"` // Enable flapping detection
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FlappingWindowSeconds int `json:"flappingWindowSeconds"` // Time window for counting state changes
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FlappingThreshold int `json:"flappingThreshold"` // Number of state changes to trigger flapping
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FlappingCooldownMinutes int `json:"flappingCooldownMinutes"` // Cooldown period after flapping detected
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}
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// pmgQuarantineSnapshot stores quarantine counts at a point in time for growth detection
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@ -460,6 +469,9 @@ type Manager struct {
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pmgAnomalyTrackers map[string]*pmgAnomalyTracker // Track mail metrics for anomaly detection per PMG instance
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// Persistent acknowledgement state so quick alert rebuilds keep user acknowledgements
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ackState map[string]ackRecord
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// Flapping detection tracking
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flappingHistory map[string][]time.Time // Track state change times for flapping detection
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flappingActive map[string]bool // Track which alerts are currently in flapping state
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}
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type ackRecord struct {
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@ -496,6 +508,8 @@ func NewManager() *Manager {
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pmgQuarantineHistory: make(map[string][]pmgQuarantineSnapshot),
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pmgAnomalyTrackers: make(map[string]*pmgAnomalyTracker),
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ackState: make(map[string]ackRecord),
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flappingHistory: make(map[string][]time.Time),
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flappingActive: make(map[string]bool),
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config: AlertConfig{
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Enabled: true,
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ActivationState: ActivationPending,
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@ -608,6 +622,15 @@ func NewManager() *Manager {
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ByGuest: false, // Don't group by guest by default
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},
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},
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// Alert TTL defaults
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MaxAlertAgeDays: 7, // Auto-cleanup alerts older than 7 days
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MaxAcknowledgedAgeDays: 1, // Auto-cleanup acknowledged alerts older than 1 day
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AutoAcknowledgeAfterHours: 24, // Auto-acknowledge alerts after 24 hours
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// Flapping detection defaults
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FlappingEnabled: true, // Enable flapping detection
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FlappingWindowSeconds: 300, // 5 minute window
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FlappingThreshold: 5, // 5 state changes triggers flapping
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FlappingCooldownMinutes: 15, // 15 minute cooldown
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},
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}
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@ -710,11 +733,69 @@ func (m *Manager) safeCallEscalateCallback(alert *Alert, level int) {
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// dispatchAlert delivers an alert to the configured callback, cloning it first to
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// prevent concurrent mutations from racing with consumers.
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// checkFlapping checks if an alert is flapping (changing state too rapidly)
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func (m *Manager) checkFlapping(alertID string) bool {
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if !m.config.FlappingEnabled {
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return false
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}
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now := time.Now()
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windowDuration := time.Duration(m.config.FlappingWindowSeconds) * time.Second
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// Record this state change
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m.flappingHistory[alertID] = append(m.flappingHistory[alertID], now)
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// Remove state changes outside the window
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history := m.flappingHistory[alertID]
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validHistory := []time.Time{}
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for _, t := range history {
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if now.Sub(t) <= windowDuration {
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validHistory = append(validHistory, t)
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}
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}
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m.flappingHistory[alertID] = validHistory
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// Check if we've exceeded the threshold
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if len(validHistory) >= m.config.FlappingThreshold {
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// Mark as flapping
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if !m.flappingActive[alertID] {
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log.Warn().
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Str("alertID", alertID).
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Int("stateChanges", len(validHistory)).
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Int("threshold", m.config.FlappingThreshold).
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Int("windowSeconds", m.config.FlappingWindowSeconds).
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Msg("Flapping detected - suppressing alert")
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m.flappingActive[alertID] = true
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// Set cooldown period
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cooldownDuration := time.Duration(m.config.FlappingCooldownMinutes) * time.Minute
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m.suppressedUntil[alertID] = now.Add(cooldownDuration)
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// Record suppression metric
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if recordAlertSuppressed != nil {
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recordAlertSuppressed("flapping")
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}
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}
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return true
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}
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return false
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}
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func (m *Manager) dispatchAlert(alert *Alert, async bool) bool {
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if m.onAlert == nil || alert == nil {
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return false
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}
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// Check for flapping
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if m.checkFlapping(alert.ID) {
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log.Debug().
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Str("alertID", alert.ID).
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Msg("Alert suppressed due to flapping")
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return false
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}
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// Check activation state - only dispatch notifications if active
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if m.config.ActivationState != ActivationActive {
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log.Debug().
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@ -6932,7 +7013,56 @@ func (m *Manager) Cleanup(maxAge time.Duration) {
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now := time.Now()
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// Clean up acknowledged alerts
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// Auto-acknowledge old alerts if configured
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if m.config.AutoAcknowledgeAfterHours > 0 {
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autoAckThreshold := time.Duration(m.config.AutoAcknowledgeAfterHours) * time.Hour
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for id, alert := range m.activeAlerts {
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if !alert.Acknowledged && now.Sub(alert.StartTime) > autoAckThreshold {
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log.Info().
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Str("alertID", id).
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Dur("age", now.Sub(alert.StartTime)).
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Msg("Auto-acknowledging old alert")
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alert.Acknowledged = true
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ackTime := now
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alert.AckTime = &ackTime
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alert.AckUser = "system-auto"
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if recordAlertAcknowledged != nil {
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recordAlertAcknowledged()
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}
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}
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}
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}
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// Clean up acknowledged alerts based on TTL
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if m.config.MaxAcknowledgedAgeDays > 0 {
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acknowledgedTTL := time.Duration(m.config.MaxAcknowledgedAgeDays) * 24 * time.Hour
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for id, alert := range m.activeAlerts {
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if alert.Acknowledged && alert.AckTime != nil && now.Sub(*alert.AckTime) > acknowledgedTTL {
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log.Info().
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Str("alertID", id).
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Dur("age", now.Sub(*alert.AckTime)).
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Msg("Cleaning up old acknowledged alert (TTL)")
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m.removeActiveAlertNoLock(id)
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}
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}
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}
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// Clean up old unacknowledged alerts based on TTL
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if m.config.MaxAlertAgeDays > 0 {
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alertTTL := time.Duration(m.config.MaxAlertAgeDays) * 24 * time.Hour
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for id, alert := range m.activeAlerts {
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if !alert.Acknowledged && now.Sub(alert.StartTime) > alertTTL {
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log.Info().
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Str("alertID", id).
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Dur("age", now.Sub(alert.StartTime)).
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Msg("Cleaning up old unacknowledged alert (TTL)")
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m.removeActiveAlertNoLock(id)
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}
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}
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}
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// Original cleanup for acknowledged alerts (fallback if TTL not configured)
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for id, alert := range m.activeAlerts {
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if alert.Acknowledged && alert.AckTime != nil && now.Sub(*alert.AckTime) > maxAge {
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m.removeActiveAlertNoLock(id)
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@ -6999,6 +7129,21 @@ func (m *Manager) Cleanup(maxAge time.Duration) {
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}
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}
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// Clean up flapping history for resolved/inactive alerts
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flappingCleanupAge := 1 * time.Hour
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for alertID := range m.flappingHistory {
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// If alert is no longer active and flapping cooldown has expired
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if _, exists := m.activeAlerts[alertID]; !exists {
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if suppressUntil, suppressed := m.suppressedUntil[alertID]; !suppressed || now.After(suppressUntil.Add(flappingCleanupAge)) {
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delete(m.flappingHistory, alertID)
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delete(m.flappingActive, alertID)
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log.Debug().
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Str("alertID", alertID).
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Msg("Cleaned up flapping history for inactive alert")
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}
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}
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}
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// Clean up old Docker restart tracking (containers not seen in 24h)
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// Prevents memory leak from ephemeral containers in CI/CD environments
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for resourceID, record := range m.dockerRestartTracking {
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@ -167,36 +167,65 @@ func (hm *HistoryManager) loadHistory() error {
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return nil
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}
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// saveHistory saves history to disk
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// saveHistory saves history to disk with retry logic
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func (hm *HistoryManager) saveHistory() error {
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return hm.saveHistoryWithRetry(3)
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}
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// saveHistoryWithRetry saves history with exponential backoff retry
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func (hm *HistoryManager) saveHistoryWithRetry(maxRetries int) error {
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hm.mu.RLock()
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snapshot := make([]HistoryEntry, len(hm.history))
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copy(snapshot, hm.history)
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hm.mu.RUnlock()
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data, err := json.Marshal(snapshot)
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if err != nil {
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return fmt.Errorf("failed to marshal history: %w", err)
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}
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// Create backup of existing file
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historyFile := hm.historyFile
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backupFile := hm.backupFile
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if _, err := os.Stat(historyFile); err == nil {
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if err := os.Rename(historyFile, backupFile); err != nil {
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log.Warn().Err(err).Msg("Failed to create backup file")
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var lastErr error
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for attempt := 1; attempt <= maxRetries; attempt++ {
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// Create backup of existing file before writing
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if _, err := os.Stat(historyFile); err == nil {
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if err := os.Rename(historyFile, backupFile); err != nil {
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log.Warn().Err(err).Msg("Failed to create backup file")
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}
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}
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// Write new file
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if err := os.WriteFile(historyFile, data, 0644); err != nil {
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lastErr = err
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log.Warn().
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Err(err).
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Int("attempt", attempt).
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Int("maxRetries", maxRetries).
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Msg("Failed to write history file, will retry")
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// Restore backup if write failed
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if _, statErr := os.Stat(backupFile); statErr == nil {
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if restoreErr := os.Rename(backupFile, historyFile); restoreErr != nil {
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log.Error().Err(restoreErr).Msg("Failed to restore backup after write failure")
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}
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}
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// Exponential backoff: 100ms, 200ms, 400ms
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if attempt < maxRetries {
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backoff := time.Duration(100*(1<<uint(attempt-1))) * time.Millisecond
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time.Sleep(backoff)
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}
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continue
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}
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// Success
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log.Debug().Int("entries", len(snapshot)).Msg("Saved alert history")
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return nil
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}
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// Write new file
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if err := os.WriteFile(historyFile, data, 0644); err != nil {
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return fmt.Errorf("failed to write history file: %w", err)
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}
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log.Debug().Int("entries", len(snapshot)).Msg("Saved alert history")
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return nil
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return fmt.Errorf("failed to write history file after %d attempts: %w", maxRetries, lastErr)
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}
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// startPeriodicSave starts the periodic save routine
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186
internal/api/notification_queue.go
Normal file
186
internal/api/notification_queue.go
Normal file
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@ -0,0 +1,186 @@
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package api
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import (
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"encoding/json"
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"net/http"
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"strconv"
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"github.com/rcourtman/pulse-go-rewrite/internal/config"
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"github.com/rcourtman/pulse-go-rewrite/internal/monitoring"
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"github.com/rcourtman/pulse-go-rewrite/internal/notifications"
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"github.com/rcourtman/pulse-go-rewrite/internal/utils"
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"github.com/rs/zerolog/log"
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)
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// NotificationQueueHandlers handles notification queue API endpoints
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type NotificationQueueHandlers struct {
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monitor *monitoring.Monitor
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}
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// NewNotificationQueueHandlers creates new notification queue handlers
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func NewNotificationQueueHandlers(monitor *monitoring.Monitor) *NotificationQueueHandlers {
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return &NotificationQueueHandlers{
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monitor: monitor,
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}
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}
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// GetDLQ returns notifications in the dead letter queue
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func (h *NotificationQueueHandlers) GetDLQ(w http.ResponseWriter, r *http.Request) {
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if !ensureScope(w, r, config.ScopeMonitoringRead) {
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return
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}
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limit := 100
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if limitStr := r.URL.Query().Get("limit"); limitStr != "" {
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if l, err := strconv.Atoi(limitStr); err == nil && l > 0 && l <= 1000 {
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limit = l
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}
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}
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queue := h.monitor.GetNotificationManager().GetQueue()
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if queue == nil {
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http.Error(w, "Notification queue not initialized", http.StatusServiceUnavailable)
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return
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}
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dlq, err := queue.GetDLQ(limit)
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if err != nil {
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log.Error().Err(err).Msg("Failed to get DLQ")
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http.Error(w, "Failed to retrieve dead letter queue", http.StatusInternalServerError)
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return
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}
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if err := utils.WriteJSONResponse(w, dlq); err != nil {
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log.Error().Err(err).Msg("Failed to write DLQ response")
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}
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}
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// GetQueueStats returns statistics about the notification queue
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func (h *NotificationQueueHandlers) GetQueueStats(w http.ResponseWriter, r *http.Request) {
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if !ensureScope(w, r, config.ScopeMonitoringRead) {
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return
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}
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queue := h.monitor.GetNotificationManager().GetQueue()
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if queue == nil {
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http.Error(w, "Notification queue not initialized", http.StatusServiceUnavailable)
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return
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}
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stats, err := queue.GetQueueStats()
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if err != nil {
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log.Error().Err(err).Msg("Failed to get queue stats")
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http.Error(w, "Failed to retrieve queue statistics", http.StatusInternalServerError)
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return
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}
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if err := utils.WriteJSONResponse(w, stats); err != nil {
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log.Error().Err(err).Msg("Failed to write queue stats response")
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}
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}
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// RetryDLQItem retries a specific notification from the DLQ
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func (h *NotificationQueueHandlers) RetryDLQItem(w http.ResponseWriter, r *http.Request) {
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if !ensureScope(w, r, config.ScopeMonitoringWrite) {
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return
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}
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var request struct {
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ID string `json:"id"`
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}
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if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
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http.Error(w, "Invalid request body", http.StatusBadRequest)
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return
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}
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if request.ID == "" {
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http.Error(w, "Missing notification ID", http.StatusBadRequest)
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return
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}
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queue := h.monitor.GetNotificationManager().GetQueue()
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if queue == nil {
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http.Error(w, "Notification queue not initialized", http.StatusServiceUnavailable)
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return
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}
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// Reset notification to pending status with immediate retry
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if err := queue.ScheduleRetry(request.ID, 0); err != nil {
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log.Error().Err(err).Str("id", request.ID).Msg("Failed to retry DLQ item")
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http.Error(w, "Failed to retry notification", http.StatusInternalServerError)
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return
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}
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log.Info().Str("id", request.ID).Msg("DLQ notification scheduled for retry")
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if err := utils.WriteJSONResponse(w, map[string]interface{}{
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"success": true,
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"message": "Notification scheduled for retry",
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"id": request.ID,
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}); err != nil {
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log.Error().Err(err).Msg("Failed to write retry response")
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}
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}
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// DeleteDLQItem removes a notification from the DLQ permanently
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func (h *NotificationQueueHandlers) DeleteDLQItem(w http.ResponseWriter, r *http.Request) {
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if !ensureScope(w, r, config.ScopeMonitoringWrite) {
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return
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}
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var request struct {
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ID string `json:"id"`
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}
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if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
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http.Error(w, "Invalid request body", http.StatusBadRequest)
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return
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}
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if request.ID == "" {
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http.Error(w, "Missing notification ID", http.StatusBadRequest)
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return
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}
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queue := h.monitor.GetNotificationManager().GetQueue()
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if queue == nil {
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http.Error(w, "Notification queue not initialized", http.StatusServiceUnavailable)
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return
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}
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// Update status to deleted/cancelled
|
||||
if err := queue.UpdateStatus(request.ID, notifications.QueueStatusCancelled, "Manually deleted from DLQ"); err != nil {
|
||||
log.Error().Err(err).Str("id", request.ID).Msg("Failed to delete DLQ item")
|
||||
http.Error(w, "Failed to delete notification", http.StatusInternalServerError)
|
||||
return
|
||||
}
|
||||
|
||||
log.Info().Str("id", request.ID).Msg("DLQ notification deleted")
|
||||
|
||||
if err := utils.WriteJSONResponse(w, map[string]interface{}{
|
||||
"success": true,
|
||||
"message": "Notification deleted from DLQ",
|
||||
"id": request.ID,
|
||||
}); err != nil {
|
||||
log.Error().Err(err).Msg("Failed to write delete response")
|
||||
}
|
||||
}
|
||||
|
||||
// HandleNotificationQueue routes notification queue requests
|
||||
func (h *NotificationQueueHandlers) HandleNotificationQueue(w http.ResponseWriter, r *http.Request) {
|
||||
path := r.URL.Path
|
||||
|
||||
switch {
|
||||
case path == "/api/notifications/dlq" && r.Method == http.MethodGet:
|
||||
h.GetDLQ(w, r)
|
||||
case path == "/api/notifications/queue/stats" && r.Method == http.MethodGet:
|
||||
h.GetQueueStats(w, r)
|
||||
case path == "/api/notifications/dlq/retry" && r.Method == http.MethodPost:
|
||||
h.RetryDLQItem(w, r)
|
||||
case path == "/api/notifications/dlq/delete" && r.Method == http.MethodPost:
|
||||
h.DeleteDLQItem(w, r)
|
||||
default:
|
||||
http.Error(w, "Not found", http.StatusNotFound)
|
||||
}
|
||||
}
|
||||
220
internal/metrics/alert_metrics.go
Normal file
220
internal/metrics/alert_metrics.go
Normal file
|
|
@ -0,0 +1,220 @@
|
|||
package metrics
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
"github.com/prometheus/client_golang/prometheus/promauto"
|
||||
"github.com/rcourtman/pulse-go-rewrite/internal/alerts"
|
||||
)
|
||||
|
||||
var (
|
||||
// Alert lifecycle metrics
|
||||
AlertsActive = promauto.NewGaugeVec(
|
||||
prometheus.GaugeOpts{
|
||||
Name: "pulse_alerts_active",
|
||||
Help: "Number of currently active alerts by level and type",
|
||||
},
|
||||
[]string{"level", "type"},
|
||||
)
|
||||
|
||||
AlertsFiredTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alerts_fired_total",
|
||||
Help: "Total number of alerts fired by level and type",
|
||||
},
|
||||
[]string{"level", "type"},
|
||||
)
|
||||
|
||||
AlertsResolvedTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alerts_resolved_total",
|
||||
Help: "Total number of alerts resolved by type",
|
||||
},
|
||||
[]string{"type"},
|
||||
)
|
||||
|
||||
AlertsAcknowledgedTotal = promauto.NewCounter(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alerts_acknowledged_total",
|
||||
Help: "Total number of alerts acknowledged",
|
||||
},
|
||||
)
|
||||
|
||||
AlertDurationSeconds = promauto.NewHistogramVec(
|
||||
prometheus.HistogramOpts{
|
||||
Name: "pulse_alert_duration_seconds",
|
||||
Help: "Duration of alerts from fire to resolve",
|
||||
Buckets: []float64{60, 300, 900, 1800, 3600, 7200, 14400, 28800, 86400}, // 1m to 1d
|
||||
},
|
||||
[]string{"type"},
|
||||
)
|
||||
|
||||
// Notification metrics
|
||||
NotificationsSentTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_notifications_sent_total",
|
||||
Help: "Total number of notifications sent by method and status",
|
||||
},
|
||||
[]string{"method", "status"}, // method: email, webhook, apprise; status: success, failure
|
||||
)
|
||||
|
||||
NotificationQueueDepth = promauto.NewGaugeVec(
|
||||
prometheus.GaugeOpts{
|
||||
Name: "pulse_notification_queue_depth",
|
||||
Help: "Number of notifications in queue by status",
|
||||
},
|
||||
[]string{"status"}, // pending, sending, dlq
|
||||
)
|
||||
|
||||
NotificationDeliveryDuration = promauto.NewHistogramVec(
|
||||
prometheus.HistogramOpts{
|
||||
Name: "pulse_notification_delivery_duration_seconds",
|
||||
Help: "Time to deliver notifications",
|
||||
Buckets: prometheus.DefBuckets,
|
||||
},
|
||||
[]string{"method"},
|
||||
)
|
||||
|
||||
NotificationRetriesTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_notification_retries_total",
|
||||
Help: "Total number of notification retry attempts",
|
||||
},
|
||||
[]string{"method"},
|
||||
)
|
||||
|
||||
NotificationDLQTotal = promauto.NewCounter(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_notification_dlq_total",
|
||||
Help: "Total number of notifications moved to dead letter queue",
|
||||
},
|
||||
)
|
||||
|
||||
// Alert grouping metrics
|
||||
NotificationsGroupedTotal = promauto.NewCounter(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_notifications_grouped_total",
|
||||
Help: "Total number of grouped notifications sent",
|
||||
},
|
||||
)
|
||||
|
||||
AlertsGroupedCount = promauto.NewHistogram(
|
||||
prometheus.HistogramOpts{
|
||||
Name: "pulse_alerts_grouped_count",
|
||||
Help: "Number of alerts in grouped notifications",
|
||||
Buckets: []float64{1, 2, 5, 10, 20, 50, 100},
|
||||
},
|
||||
)
|
||||
|
||||
// Escalation metrics
|
||||
AlertEscalationsTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alert_escalations_total",
|
||||
Help: "Total number of alert escalations by level",
|
||||
},
|
||||
[]string{"level"},
|
||||
)
|
||||
|
||||
// History metrics
|
||||
AlertHistorySize = promauto.NewGauge(
|
||||
prometheus.GaugeOpts{
|
||||
Name: "pulse_alert_history_size",
|
||||
Help: "Number of alerts in history",
|
||||
},
|
||||
)
|
||||
|
||||
AlertHistorySaveErrors = promauto.NewCounter(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alert_history_save_errors_total",
|
||||
Help: "Total number of alert history save failures",
|
||||
},
|
||||
)
|
||||
|
||||
// Suppression and quiet hours metrics
|
||||
AlertsSuppressedTotal = promauto.NewCounterVec(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alerts_suppressed_total",
|
||||
Help: "Total number of alerts suppressed by reason",
|
||||
},
|
||||
[]string{"reason"}, // quiet_hours, rate_limit, duplicate, etc.
|
||||
)
|
||||
|
||||
AlertsRateLimitedTotal = promauto.NewCounter(
|
||||
prometheus.CounterOpts{
|
||||
Name: "pulse_alerts_rate_limited_total",
|
||||
Help: "Total number of alerts suppressed due to rate limiting",
|
||||
},
|
||||
)
|
||||
)
|
||||
|
||||
// RecordAlertFired records when an alert is fired
|
||||
func RecordAlertFired(alert *alerts.Alert) {
|
||||
AlertsFiredTotal.WithLabelValues(string(alert.Level), alert.Type).Inc()
|
||||
AlertsActive.WithLabelValues(string(alert.Level), alert.Type).Inc()
|
||||
}
|
||||
|
||||
// RecordAlertResolved records when an alert is resolved
|
||||
func RecordAlertResolved(alert *alerts.Alert) {
|
||||
AlertsResolvedTotal.WithLabelValues(alert.Type).Inc()
|
||||
AlertsActive.WithLabelValues(string(alert.Level), alert.Type).Dec()
|
||||
|
||||
// Record duration
|
||||
duration := alert.LastSeen.Sub(alert.StartTime).Seconds()
|
||||
AlertDurationSeconds.WithLabelValues(alert.Type).Observe(duration)
|
||||
}
|
||||
|
||||
// RecordAlertAcknowledged records when an alert is acknowledged
|
||||
func RecordAlertAcknowledged() {
|
||||
AlertsAcknowledgedTotal.Inc()
|
||||
}
|
||||
|
||||
// RecordNotificationSent records a notification delivery attempt
|
||||
func RecordNotificationSent(method string, success bool) {
|
||||
status := "success"
|
||||
if !success {
|
||||
status = "failure"
|
||||
}
|
||||
NotificationsSentTotal.WithLabelValues(method, status).Inc()
|
||||
}
|
||||
|
||||
// RecordNotificationRetry records a notification retry
|
||||
func RecordNotificationRetry(method string) {
|
||||
NotificationRetriesTotal.WithLabelValues(method).Inc()
|
||||
}
|
||||
|
||||
// RecordNotificationDLQ records a notification moved to DLQ
|
||||
func RecordNotificationDLQ() {
|
||||
NotificationDLQTotal.Inc()
|
||||
}
|
||||
|
||||
// RecordGroupedNotification records a grouped notification
|
||||
func RecordGroupedNotification(alertCount int) {
|
||||
NotificationsGroupedTotal.Inc()
|
||||
AlertsGroupedCount.Observe(float64(alertCount))
|
||||
}
|
||||
|
||||
// RecordAlertEscalation records an alert escalation
|
||||
func RecordAlertEscalation(level int) {
|
||||
AlertEscalationsTotal.WithLabelValues(fmt.Sprintf("%d", level)).Inc()
|
||||
}
|
||||
|
||||
// RecordAlertSuppressed records a suppressed alert
|
||||
func RecordAlertSuppressed(reason string) {
|
||||
AlertsSuppressedTotal.WithLabelValues(reason).Inc()
|
||||
}
|
||||
|
||||
// UpdateQueueDepth updates the notification queue depth metric
|
||||
func UpdateQueueDepth(status string, count int) {
|
||||
NotificationQueueDepth.WithLabelValues(status).Set(float64(count))
|
||||
}
|
||||
|
||||
// UpdateHistorySize updates the alert history size metric
|
||||
func UpdateHistorySize(size int) {
|
||||
AlertHistorySize.Set(float64(size))
|
||||
}
|
||||
|
||||
// RecordHistorySaveError records a history save failure
|
||||
func RecordHistorySaveError() {
|
||||
AlertHistorySaveErrors.Inc()
|
||||
}
|
||||
673
internal/notifications/queue.go
Normal file
673
internal/notifications/queue.go
Normal file
|
|
@ -0,0 +1,673 @@
|
|||
package notifications
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"path/filepath"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/rcourtman/pulse-go-rewrite/internal/alerts"
|
||||
"github.com/rcourtman/pulse-go-rewrite/internal/utils"
|
||||
_ "github.com/mattn/go-sqlite3"
|
||||
"github.com/rs/zerolog/log"
|
||||
)
|
||||
|
||||
// NotificationQueueStatus represents the status of a queued notification
|
||||
type NotificationQueueStatus string
|
||||
|
||||
const (
|
||||
QueueStatusPending NotificationQueueStatus = "pending"
|
||||
QueueStatusSending NotificationQueueStatus = "sending"
|
||||
QueueStatusSent NotificationQueueStatus = "sent"
|
||||
QueueStatusFailed NotificationQueueStatus = "failed"
|
||||
QueueStatusDLQ NotificationQueueStatus = "dlq"
|
||||
QueueStatusCancelled NotificationQueueStatus = "cancelled"
|
||||
)
|
||||
|
||||
// QueuedNotification represents a notification in the persistent queue
|
||||
type QueuedNotification struct {
|
||||
ID string `json:"id"`
|
||||
Type string `json:"type"` // email, webhook, apprise
|
||||
Method string `json:"method,omitempty"`
|
||||
Status NotificationQueueStatus `json:"status"`
|
||||
Alerts []*alerts.Alert `json:"alerts"`
|
||||
Config json.RawMessage `json:"config"` // EmailConfig, WebhookConfig, or AppriseConfig
|
||||
Attempts int `json:"attempts"`
|
||||
MaxAttempts int `json:"maxAttempts"`
|
||||
LastAttempt *time.Time `json:"lastAttempt,omitempty"`
|
||||
LastError string `json:"lastError,omitempty"`
|
||||
CreatedAt time.Time `json:"createdAt"`
|
||||
NextRetryAt *time.Time `json:"nextRetryAt,omitempty"`
|
||||
CompletedAt *time.Time `json:"completedAt,omitempty"`
|
||||
PayloadBytes int `json:"payloadBytes,omitempty"`
|
||||
}
|
||||
|
||||
// NotificationQueue manages persistent notification delivery with retries and DLQ
|
||||
type NotificationQueue struct {
|
||||
mu sync.RWMutex
|
||||
db *sql.DB
|
||||
dbPath string
|
||||
stopChan chan struct{}
|
||||
wg sync.WaitGroup
|
||||
processorTicker *time.Ticker
|
||||
cleanupTicker *time.Ticker
|
||||
notifyChan chan struct{} // Signal when new notifications are added
|
||||
processor func(*QueuedNotification) error // Notification processor function
|
||||
}
|
||||
|
||||
// NewNotificationQueue creates a new persistent notification queue
|
||||
func NewNotificationQueue(dataDir string) (*NotificationQueue, error) {
|
||||
if dataDir == "" {
|
||||
dataDir = filepath.Join(utils.GetDataDir(), "notifications")
|
||||
}
|
||||
|
||||
dbPath := filepath.Join(dataDir, "notification_queue.db")
|
||||
|
||||
db, err := sql.Open("sqlite3", dbPath)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to open notification queue database: %w", err)
|
||||
}
|
||||
|
||||
// Configure SQLite for better concurrency and durability
|
||||
pragmas := []string{
|
||||
"PRAGMA journal_mode=WAL",
|
||||
"PRAGMA synchronous=NORMAL",
|
||||
"PRAGMA busy_timeout=5000",
|
||||
"PRAGMA foreign_keys=ON",
|
||||
"PRAGMA cache_size=-64000", // 64MB cache
|
||||
}
|
||||
|
||||
for _, pragma := range pragmas {
|
||||
if _, err := db.Exec(pragma); err != nil {
|
||||
db.Close()
|
||||
return nil, fmt.Errorf("failed to set pragma: %w", err)
|
||||
}
|
||||
}
|
||||
|
||||
nq := &NotificationQueue{
|
||||
db: db,
|
||||
dbPath: dbPath,
|
||||
stopChan: make(chan struct{}),
|
||||
processorTicker: time.NewTicker(5 * time.Second),
|
||||
cleanupTicker: time.NewTicker(1 * time.Hour),
|
||||
notifyChan: make(chan struct{}, 100),
|
||||
}
|
||||
|
||||
if err := nq.initSchema(); err != nil {
|
||||
db.Close()
|
||||
return nil, fmt.Errorf("failed to initialize schema: %w", err)
|
||||
}
|
||||
|
||||
// Start background processors
|
||||
nq.wg.Add(2)
|
||||
go nq.processQueue()
|
||||
go nq.cleanupOldEntries()
|
||||
|
||||
log.Info().
|
||||
Str("dbPath", dbPath).
|
||||
Msg("Notification queue initialized")
|
||||
|
||||
return nq, nil
|
||||
}
|
||||
|
||||
// initSchema creates the database tables
|
||||
func (nq *NotificationQueue) initSchema() error {
|
||||
schema := `
|
||||
CREATE TABLE IF NOT EXISTS notification_queue (
|
||||
id TEXT PRIMARY KEY,
|
||||
type TEXT NOT NULL,
|
||||
method TEXT,
|
||||
status TEXT NOT NULL,
|
||||
alerts TEXT NOT NULL,
|
||||
config TEXT NOT NULL,
|
||||
attempts INTEGER NOT NULL DEFAULT 0,
|
||||
max_attempts INTEGER NOT NULL DEFAULT 3,
|
||||
last_attempt INTEGER,
|
||||
last_error TEXT,
|
||||
created_at INTEGER NOT NULL,
|
||||
next_retry_at INTEGER,
|
||||
completed_at INTEGER,
|
||||
payload_bytes INTEGER
|
||||
);
|
||||
|
||||
CREATE INDEX IF NOT EXISTS idx_status ON notification_queue(status);
|
||||
CREATE INDEX IF NOT EXISTS idx_next_retry ON notification_queue(next_retry_at) WHERE status = 'pending';
|
||||
CREATE INDEX IF NOT EXISTS idx_created_at ON notification_queue(created_at);
|
||||
|
||||
CREATE TABLE IF NOT EXISTS notification_audit (
|
||||
id INTEGER PRIMARY KEY AUTOINCREMENT,
|
||||
notification_id TEXT NOT NULL,
|
||||
type TEXT NOT NULL,
|
||||
method TEXT,
|
||||
status TEXT NOT NULL,
|
||||
alert_ids TEXT,
|
||||
alert_count INTEGER,
|
||||
attempts INTEGER,
|
||||
success BOOLEAN,
|
||||
error_message TEXT,
|
||||
payload_size INTEGER,
|
||||
timestamp INTEGER NOT NULL,
|
||||
FOREIGN KEY (notification_id) REFERENCES notification_queue(id)
|
||||
);
|
||||
|
||||
CREATE INDEX IF NOT EXISTS idx_audit_timestamp ON notification_audit(timestamp);
|
||||
CREATE INDEX IF NOT EXISTS idx_audit_notification_id ON notification_audit(notification_id);
|
||||
CREATE INDEX IF NOT EXISTS idx_audit_status ON notification_audit(status);
|
||||
`
|
||||
|
||||
_, err := nq.db.Exec(schema)
|
||||
return err
|
||||
}
|
||||
|
||||
// Enqueue adds a notification to the queue
|
||||
func (nq *NotificationQueue) Enqueue(notif *QueuedNotification) error {
|
||||
if notif.ID == "" {
|
||||
notif.ID = fmt.Sprintf("%s-%d", notif.Type, time.Now().UnixNano())
|
||||
}
|
||||
if notif.Status == "" {
|
||||
notif.Status = QueueStatusPending
|
||||
}
|
||||
if notif.MaxAttempts == 0 {
|
||||
notif.MaxAttempts = 3
|
||||
}
|
||||
if notif.CreatedAt.IsZero() {
|
||||
notif.CreatedAt = time.Now()
|
||||
}
|
||||
|
||||
alertsJSON, err := json.Marshal(notif.Alerts)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to marshal alerts: %w", err)
|
||||
}
|
||||
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
|
||||
query := `
|
||||
INSERT INTO notification_queue
|
||||
(id, type, method, status, alerts, config, attempts, max_attempts, created_at, next_retry_at)
|
||||
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
|
||||
`
|
||||
|
||||
var nextRetryAt *int64
|
||||
if notif.NextRetryAt != nil {
|
||||
ts := notif.NextRetryAt.Unix()
|
||||
nextRetryAt = &ts
|
||||
}
|
||||
|
||||
_, err = nq.db.Exec(query,
|
||||
notif.ID,
|
||||
notif.Type,
|
||||
notif.Method,
|
||||
notif.Status,
|
||||
string(alertsJSON),
|
||||
string(notif.Config),
|
||||
notif.Attempts,
|
||||
notif.MaxAttempts,
|
||||
notif.CreatedAt.Unix(),
|
||||
nextRetryAt,
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to enqueue notification: %w", err)
|
||||
}
|
||||
|
||||
log.Debug().
|
||||
Str("id", notif.ID).
|
||||
Str("type", notif.Type).
|
||||
Int("alertCount", len(notif.Alerts)).
|
||||
Msg("Notification enqueued")
|
||||
|
||||
// Signal processor that new work is available
|
||||
select {
|
||||
case nq.notifyChan <- struct{}{}:
|
||||
default:
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// UpdateStatus updates the status of a queued notification
|
||||
func (nq *NotificationQueue) UpdateStatus(id string, status NotificationQueueStatus, errorMsg string) error {
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
|
||||
now := time.Now().Unix()
|
||||
var completedAt *int64
|
||||
if status == QueueStatusSent || status == QueueStatusFailed || status == QueueStatusDLQ {
|
||||
completedAt = &now
|
||||
}
|
||||
|
||||
query := `
|
||||
UPDATE notification_queue
|
||||
SET status = ?, last_attempt = ?, last_error = ?, completed_at = ?, attempts = attempts + 1
|
||||
WHERE id = ?
|
||||
`
|
||||
|
||||
result, err := nq.db.Exec(query, status, now, errorMsg, completedAt, id)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to update notification status: %w", err)
|
||||
}
|
||||
|
||||
rows, _ := result.RowsAffected()
|
||||
if rows == 0 {
|
||||
return fmt.Errorf("notification not found: %s", id)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// GetPending returns notifications ready for processing
|
||||
func (nq *NotificationQueue) GetPending(limit int) ([]*QueuedNotification, error) {
|
||||
nq.mu.RLock()
|
||||
defer nq.mu.RUnlock()
|
||||
|
||||
query := `
|
||||
SELECT id, type, method, status, alerts, config, attempts, max_attempts,
|
||||
last_attempt, last_error, created_at, next_retry_at, completed_at, payload_bytes
|
||||
FROM notification_queue
|
||||
WHERE status = 'pending'
|
||||
AND (next_retry_at IS NULL OR next_retry_at <= ?)
|
||||
ORDER BY created_at ASC
|
||||
LIMIT ?
|
||||
`
|
||||
|
||||
rows, err := nq.db.Query(query, time.Now().Unix(), limit)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to query pending notifications: %w", err)
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
var notifications []*QueuedNotification
|
||||
for rows.Next() {
|
||||
notif, err := nq.scanNotification(rows)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to scan notification row")
|
||||
continue
|
||||
}
|
||||
notifications = append(notifications, notif)
|
||||
}
|
||||
|
||||
return notifications, rows.Err()
|
||||
}
|
||||
|
||||
// scanNotification scans a database row into a QueuedNotification
|
||||
func (nq *NotificationQueue) scanNotification(rows *sql.Rows) (*QueuedNotification, error) {
|
||||
var notif QueuedNotification
|
||||
var alertsJSON, configJSON string
|
||||
var lastAttempt, nextRetryAt, completedAt *int64
|
||||
var createdAtUnix int64
|
||||
|
||||
err := rows.Scan(
|
||||
¬if.ID,
|
||||
¬if.Type,
|
||||
¬if.Method,
|
||||
¬if.Status,
|
||||
&alertsJSON,
|
||||
&configJSON,
|
||||
¬if.Attempts,
|
||||
¬if.MaxAttempts,
|
||||
&lastAttempt,
|
||||
¬if.LastError,
|
||||
&createdAtUnix,
|
||||
&nextRetryAt,
|
||||
&completedAt,
|
||||
¬if.PayloadBytes,
|
||||
)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
notif.CreatedAt = time.Unix(createdAtUnix, 0)
|
||||
|
||||
if lastAttempt != nil {
|
||||
t := time.Unix(*lastAttempt, 0)
|
||||
notif.LastAttempt = &t
|
||||
}
|
||||
if nextRetryAt != nil {
|
||||
t := time.Unix(*nextRetryAt, 0)
|
||||
notif.NextRetryAt = &t
|
||||
}
|
||||
if completedAt != nil {
|
||||
t := time.Unix(*completedAt, 0)
|
||||
notif.CompletedAt = &t
|
||||
}
|
||||
|
||||
if err := json.Unmarshal([]byte(alertsJSON), ¬if.Alerts); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal alerts: %w", err)
|
||||
}
|
||||
|
||||
notif.Config = json.RawMessage(configJSON)
|
||||
|
||||
return ¬if, nil
|
||||
}
|
||||
|
||||
// ScheduleRetry schedules a notification for retry with exponential backoff
|
||||
func (nq *NotificationQueue) ScheduleRetry(id string, attempt int) error {
|
||||
backoff := calculateBackoff(attempt)
|
||||
nextRetry := time.Now().Add(backoff)
|
||||
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
|
||||
query := `
|
||||
UPDATE notification_queue
|
||||
SET status = 'pending', next_retry_at = ?, last_attempt = ?
|
||||
WHERE id = ?
|
||||
`
|
||||
|
||||
_, err := nq.db.Exec(query, nextRetry.Unix(), time.Now().Unix(), id)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to schedule retry: %w", err)
|
||||
}
|
||||
|
||||
log.Debug().
|
||||
Str("id", id).
|
||||
Int("attempt", attempt).
|
||||
Dur("backoff", backoff).
|
||||
Time("nextRetry", nextRetry).
|
||||
Msg("Notification retry scheduled")
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// MoveToDLQ moves a notification to the dead letter queue
|
||||
func (nq *NotificationQueue) MoveToDLQ(id string, reason string) error {
|
||||
return nq.UpdateStatus(id, QueueStatusDLQ, reason)
|
||||
}
|
||||
|
||||
// GetDLQ returns all notifications in the dead letter queue
|
||||
func (nq *NotificationQueue) GetDLQ(limit int) ([]*QueuedNotification, error) {
|
||||
nq.mu.RLock()
|
||||
defer nq.mu.RUnlock()
|
||||
|
||||
query := `
|
||||
SELECT id, type, method, status, alerts, config, attempts, max_attempts,
|
||||
last_attempt, last_error, created_at, next_retry_at, completed_at, payload_bytes
|
||||
FROM notification_queue
|
||||
WHERE status = 'dlq'
|
||||
ORDER BY completed_at DESC
|
||||
LIMIT ?
|
||||
`
|
||||
|
||||
rows, err := nq.db.Query(query, limit)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to query DLQ: %w", err)
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
var notifications []*QueuedNotification
|
||||
for rows.Next() {
|
||||
notif, err := nq.scanNotification(rows)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to scan DLQ notification")
|
||||
continue
|
||||
}
|
||||
notifications = append(notifications, notif)
|
||||
}
|
||||
|
||||
return notifications, rows.Err()
|
||||
}
|
||||
|
||||
// RecordAudit records a notification delivery attempt in the audit log
|
||||
func (nq *NotificationQueue) RecordAudit(notif *QueuedNotification, success bool, errorMsg string) error {
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
|
||||
alertIDs := make([]string, len(notif.Alerts))
|
||||
for i, alert := range notif.Alerts {
|
||||
alertIDs[i] = alert.ID
|
||||
}
|
||||
alertIDsJSON, _ := json.Marshal(alertIDs)
|
||||
|
||||
query := `
|
||||
INSERT INTO notification_audit
|
||||
(notification_id, type, method, status, alert_ids, alert_count, attempts, success, error_message, payload_size, timestamp)
|
||||
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
|
||||
`
|
||||
|
||||
_, err := nq.db.Exec(query,
|
||||
notif.ID,
|
||||
notif.Type,
|
||||
notif.Method,
|
||||
notif.Status,
|
||||
string(alertIDsJSON),
|
||||
len(notif.Alerts),
|
||||
notif.Attempts,
|
||||
success,
|
||||
errorMsg,
|
||||
notif.PayloadBytes,
|
||||
time.Now().Unix(),
|
||||
)
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
// GetQueueStats returns statistics about the notification queue
|
||||
func (nq *NotificationQueue) GetQueueStats() (map[string]int, error) {
|
||||
nq.mu.RLock()
|
||||
defer nq.mu.RUnlock()
|
||||
|
||||
query := `
|
||||
SELECT status, COUNT(*) as count
|
||||
FROM notification_queue
|
||||
WHERE completed_at IS NULL OR completed_at > ?
|
||||
GROUP BY status
|
||||
`
|
||||
|
||||
// Include last 24 hours of completed
|
||||
since := time.Now().Add(-24 * time.Hour).Unix()
|
||||
|
||||
rows, err := nq.db.Query(query, since)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer rows.Close()
|
||||
|
||||
stats := make(map[string]int)
|
||||
for rows.Next() {
|
||||
var status string
|
||||
var count int
|
||||
if err := rows.Scan(&status, &count); err != nil {
|
||||
continue
|
||||
}
|
||||
stats[status] = count
|
||||
}
|
||||
|
||||
return stats, nil
|
||||
}
|
||||
|
||||
// processQueue runs in background to process pending notifications
|
||||
func (nq *NotificationQueue) processQueue() {
|
||||
defer nq.wg.Done()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-nq.stopChan:
|
||||
return
|
||||
case <-nq.processorTicker.C:
|
||||
nq.processBatch()
|
||||
case <-nq.notifyChan:
|
||||
// Process immediately when notified
|
||||
nq.processBatch()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// SetProcessor sets the notification processor function
|
||||
func (nq *NotificationQueue) SetProcessor(processor func(*QueuedNotification) error) {
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
nq.processor = processor
|
||||
}
|
||||
|
||||
// processBatch processes a batch of pending notifications
|
||||
func (nq *NotificationQueue) processBatch() {
|
||||
pending, err := nq.GetPending(10)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to get pending notifications")
|
||||
return
|
||||
}
|
||||
|
||||
if len(pending) == 0 {
|
||||
return
|
||||
}
|
||||
|
||||
log.Debug().Int("count", len(pending)).Msg("Processing notification batch")
|
||||
|
||||
for _, notif := range pending {
|
||||
nq.processNotification(notif)
|
||||
}
|
||||
}
|
||||
|
||||
// processNotification processes a single notification
|
||||
func (nq *NotificationQueue) processNotification(notif *QueuedNotification) {
|
||||
// Update status to sending
|
||||
if err := nq.UpdateStatus(notif.ID, QueueStatusSending, ""); err != nil {
|
||||
log.Error().Err(err).Str("id", notif.ID).Msg("Failed to update notification status to sending")
|
||||
return
|
||||
}
|
||||
|
||||
// Call processor if set
|
||||
nq.mu.RLock()
|
||||
processor := nq.processor
|
||||
nq.mu.RUnlock()
|
||||
|
||||
var err error
|
||||
if processor != nil {
|
||||
err = processor(notif)
|
||||
} else {
|
||||
err = fmt.Errorf("no processor configured")
|
||||
}
|
||||
|
||||
// Record audit
|
||||
success := err == nil
|
||||
errorMsg := ""
|
||||
if err != nil {
|
||||
errorMsg = err.Error()
|
||||
}
|
||||
|
||||
if auditErr := nq.RecordAudit(notif, success, errorMsg); auditErr != nil {
|
||||
log.Error().Err(auditErr).Str("id", notif.ID).Msg("Failed to record audit")
|
||||
}
|
||||
|
||||
if success {
|
||||
// Mark as sent
|
||||
if err := nq.UpdateStatus(notif.ID, QueueStatusSent, ""); err != nil {
|
||||
log.Error().Err(err).Str("id", notif.ID).Msg("Failed to update notification status to sent")
|
||||
}
|
||||
log.Info().Str("id", notif.ID).Str("type", notif.Type).Msg("Notification sent successfully")
|
||||
} else {
|
||||
// Check if we should retry or move to DLQ
|
||||
if notif.Attempts+1 >= notif.MaxAttempts {
|
||||
// Move to DLQ
|
||||
if dlqErr := nq.MoveToDLQ(notif.ID, errorMsg); dlqErr != nil {
|
||||
log.Error().Err(dlqErr).Str("id", notif.ID).Msg("Failed to move notification to DLQ")
|
||||
} else {
|
||||
log.Warn().
|
||||
Str("id", notif.ID).
|
||||
Str("type", notif.Type).
|
||||
Int("attempts", notif.Attempts+1).
|
||||
Str("error", errorMsg).
|
||||
Msg("Notification moved to DLQ after max retries")
|
||||
}
|
||||
} else {
|
||||
// Schedule retry
|
||||
if retryErr := nq.ScheduleRetry(notif.ID, notif.Attempts+1); retryErr != nil {
|
||||
log.Error().Err(retryErr).Str("id", notif.ID).Msg("Failed to schedule retry")
|
||||
} else {
|
||||
log.Warn().
|
||||
Str("id", notif.ID).
|
||||
Str("type", notif.Type).
|
||||
Int("attempt", notif.Attempts+1).
|
||||
Str("error", errorMsg).
|
||||
Msg("Notification failed, scheduled for retry")
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// cleanupOldEntries removes old completed notifications
|
||||
func (nq *NotificationQueue) cleanupOldEntries() {
|
||||
defer nq.wg.Done()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-nq.stopChan:
|
||||
return
|
||||
case <-nq.cleanupTicker.C:
|
||||
nq.performCleanup()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// performCleanup removes notifications older than retention period
|
||||
func (nq *NotificationQueue) performCleanup() {
|
||||
nq.mu.Lock()
|
||||
defer nq.mu.Unlock()
|
||||
|
||||
// Keep completed/failed for 7 days, DLQ for 30 days
|
||||
completedCutoff := time.Now().Add(-7 * 24 * time.Hour).Unix()
|
||||
dlqCutoff := time.Now().Add(-30 * 24 * time.Hour).Unix()
|
||||
|
||||
// Clean completed/sent/failed
|
||||
query := `DELETE FROM notification_queue WHERE status IN ('sent', 'failed') AND completed_at < ?`
|
||||
result, err := nq.db.Exec(query, completedCutoff)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to cleanup old notifications")
|
||||
} else {
|
||||
if rows, _ := result.RowsAffected(); rows > 0 {
|
||||
log.Info().Int64("count", rows).Msg("Cleaned up old completed notifications")
|
||||
}
|
||||
}
|
||||
|
||||
// Clean old DLQ entries
|
||||
query = `DELETE FROM notification_queue WHERE status = 'dlq' AND completed_at < ?`
|
||||
result, err = nq.db.Exec(query, dlqCutoff)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to cleanup old DLQ entries")
|
||||
} else {
|
||||
if rows, _ := result.RowsAffected(); rows > 0 {
|
||||
log.Info().Int64("count", rows).Msg("Cleaned up old DLQ entries")
|
||||
}
|
||||
}
|
||||
|
||||
// Clean old audit logs (keep 30 days)
|
||||
auditCutoff := time.Now().Add(-30 * 24 * time.Hour).Unix()
|
||||
query = `DELETE FROM notification_audit WHERE timestamp < ?`
|
||||
result, err = nq.db.Exec(query, auditCutoff)
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("Failed to cleanup old audit logs")
|
||||
} else {
|
||||
if rows, _ := result.RowsAffected(); rows > 0 {
|
||||
log.Debug().Int64("count", rows).Msg("Cleaned up old audit logs")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Stop gracefully stops the queue processor
|
||||
func (nq *NotificationQueue) Stop() error {
|
||||
close(nq.stopChan)
|
||||
nq.wg.Wait()
|
||||
|
||||
nq.processorTicker.Stop()
|
||||
nq.cleanupTicker.Stop()
|
||||
|
||||
if err := nq.db.Close(); err != nil {
|
||||
return fmt.Errorf("failed to close database: %w", err)
|
||||
}
|
||||
|
||||
log.Info().Msg("Notification queue stopped")
|
||||
return nil
|
||||
}
|
||||
|
||||
// calculateBackoff calculates exponential backoff duration
|
||||
func calculateBackoff(attempt int) time.Duration {
|
||||
// 1s, 2s, 4s, 8s, 16s, 32s, 60s (capped)
|
||||
backoff := time.Duration(1<<uint(attempt)) * time.Second
|
||||
if backoff > 60*time.Second {
|
||||
backoff = 60 * time.Second
|
||||
}
|
||||
return backoff
|
||||
}
|
||||
|
|
@ -269,11 +269,18 @@ func cloneMetadataValue(value interface{}) interface{} {
|
|||
type Hub struct {
|
||||
clients map[*Client]bool
|
||||
broadcast chan []byte
|
||||
broadcastSeq chan Message // Sequenced broadcast channel for ordering
|
||||
register chan *Client
|
||||
unregister chan *Client
|
||||
mu sync.RWMutex
|
||||
getState func() interface{} // Function to get current state
|
||||
allowedOrigins []string // Allowed origins for CORS
|
||||
// Broadcast coalescing fields
|
||||
lastBroadcast time.Time
|
||||
coalesceWindow time.Duration
|
||||
coalescePending *Message
|
||||
coalesceTimer *time.Timer
|
||||
coalesceMutex sync.Mutex
|
||||
}
|
||||
|
||||
// Message represents a WebSocket message
|
||||
|
|
@ -295,15 +302,20 @@ func NewHub(getState func() interface{}) *Hub {
|
|||
return &Hub{
|
||||
clients: make(map[*Client]bool),
|
||||
broadcast: make(chan []byte, 256),
|
||||
broadcastSeq: make(chan Message, 256), // Buffered sequenced channel
|
||||
register: make(chan *Client),
|
||||
unregister: make(chan *Client),
|
||||
getState: getState,
|
||||
allowedOrigins: []string{}, // Default to empty (will be set based on actual host)
|
||||
coalesceWindow: 100 * time.Millisecond, // Coalesce rapid updates within 100ms
|
||||
}
|
||||
}
|
||||
|
||||
// Run starts the hub's main loop
|
||||
func (h *Hub) Run() {
|
||||
// Start broadcast sequencer goroutine
|
||||
go h.runBroadcastSequencer()
|
||||
|
||||
pingTicker := time.NewTicker(30 * time.Second)
|
||||
defer pingTicker.Stop()
|
||||
|
||||
|
|
@ -453,7 +465,61 @@ func (h *Hub) HandleWebSocket(w http.ResponseWriter, r *http.Request) {
|
|||
go client.readPump()
|
||||
}
|
||||
|
||||
// BroadcastState broadcasts state update to all clients
|
||||
// runBroadcastSequencer handles sequenced broadcasts with coalescing for rapid state updates
|
||||
func (h *Hub) runBroadcastSequencer() {
|
||||
for msg := range h.broadcastSeq {
|
||||
// Handle raw data (state) messages with coalescing
|
||||
if msg.Type == "rawData" {
|
||||
h.coalesceMutex.Lock()
|
||||
|
||||
// Cancel pending timer if exists
|
||||
if h.coalesceTimer != nil {
|
||||
h.coalesceTimer.Stop()
|
||||
}
|
||||
|
||||
// Update pending message
|
||||
h.coalescePending = &msg
|
||||
|
||||
// Set timer to send after coalesce window
|
||||
h.coalesceTimer = time.AfterFunc(h.coalesceWindow, func() {
|
||||
h.coalesceMutex.Lock()
|
||||
if h.coalescePending != nil {
|
||||
// Send the coalesced message
|
||||
if data, err := json.Marshal(*h.coalescePending); err == nil {
|
||||
h.mu.RLock()
|
||||
for client := range h.clients {
|
||||
select {
|
||||
case client.send <- data:
|
||||
default:
|
||||
log.Warn().Str("client", client.id).Msg("Client send channel full, skipping coalesced message")
|
||||
}
|
||||
}
|
||||
h.mu.RUnlock()
|
||||
}
|
||||
h.coalescePending = nil
|
||||
}
|
||||
h.coalesceMutex.Unlock()
|
||||
})
|
||||
|
||||
h.coalesceMutex.Unlock()
|
||||
} else {
|
||||
// Non-state messages (alerts, etc.) - send immediately
|
||||
if data, err := json.Marshal(msg); err == nil {
|
||||
h.mu.RLock()
|
||||
for client := range h.clients {
|
||||
select {
|
||||
case client.send <- data:
|
||||
default:
|
||||
log.Warn().Str("client", client.id).Msg("Client send channel full, skipping message")
|
||||
}
|
||||
}
|
||||
h.mu.RUnlock()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// BroadcastState broadcasts state update to all clients via sequencer
|
||||
func (h *Hub) BroadcastState(state interface{}) {
|
||||
// Debug log to track docker hosts
|
||||
dockerHostsCount := -1
|
||||
|
|
@ -471,7 +537,13 @@ func (h *Hub) BroadcastState(state interface{}) {
|
|||
Type: "rawData",
|
||||
Data: state,
|
||||
}
|
||||
h.BroadcastMessage(msg)
|
||||
|
||||
// Send through sequencer for ordering and coalescing
|
||||
select {
|
||||
case h.broadcastSeq <- msg:
|
||||
default:
|
||||
log.Warn().Msg("Broadcast sequencer channel full, dropping state update")
|
||||
}
|
||||
}
|
||||
|
||||
// BroadcastAlert broadcasts alert to all clients
|
||||
|
|
|
|||
Loading…
Reference in a new issue