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feat: add incident management and maintenance windows

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Maintenance windows suppress alerts during planned downtime while checks
continue running. Incidents provide informational tracking. Supports
targeting all monitors, single monitor, or group (applies to children).

New Maint tab in TUI with create/end/delete. Status page, JSON API, and
Prometheus metrics all reflect maintenance state.
This commit is contained in:
Tyler Koenig
2026-05-22 18:45:02 -04:00
parent 5de834465f
commit b146f34d19
12 changed files with 568 additions and 37 deletions
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internal/monitor/monitor.go
+38 -6
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@@ -385,10 +385,16 @@ func (e *Engine) handleStatusChange(site models.Site, rawStatus string, code int
newState.FailureCount = site.MaxRetries + 1
}
inMaint := e.isInMaintenance(site.ID)
if site.Type == "http" && site.CheckSSL && site.HasSSL {
daysLeft := int(time.Until(site.CertExpiry).Hours() / 24)
if daysLeft <= site.ExpiryThreshold && !site.SentSSLWarning && rawStatus != "SSL EXP" {
e.triggerAlert(site.AlertID, "SSL WARNING", fmt.Sprintf("SSL for '%s' expires in %d days", site.Name, daysLeft))
if !inMaint {
e.triggerAlert(site.AlertID, "SSL WARNING", fmt.Sprintf("SSL for '%s' expires in %d days", site.Name, daysLeft))
} else {
e.AddLog(fmt.Sprintf("SSL warning for '%s' suppressed (maintenance)", site.Name))
}
newState.SentSSLWarning = true
} else if daysLeft > site.ExpiryThreshold {
newState.SentSSLWarning = false
@@ -405,14 +411,22 @@ func (e *Engine) handleStatusChange(site models.Site, rawStatus string, code int
isBroken := func(s string) bool { return s == "DOWN" || s == "SSL EXP" }
if !isBroken(site.Status) && isBroken(newState.Status) && newState.Status != "PENDING" {
msg := fmt.Sprintf("Monitor '%s' is DOWN (%s)", site.Name, rawStatus)
if site.Type == "push" {
msg = fmt.Sprintf("Push Monitor '%s' missed heartbeat.", site.Name)
if inMaint {
e.AddLog(fmt.Sprintf("Monitor '%s' is DOWN (alerts suppressed — maintenance)", site.Name))
} else {
msg := fmt.Sprintf("Monitor '%s' is DOWN (%s)", site.Name, rawStatus)
if site.Type == "push" {
msg = fmt.Sprintf("Push Monitor '%s' missed heartbeat.", site.Name)
}
e.triggerAlert(site.AlertID, "🚨 ALERT", msg)
}
e.triggerAlert(site.AlertID, "🚨 ALERT", msg)
}
if isBroken(site.Status) && newState.Status == "UP" {
e.triggerAlert(site.AlertID, "✅ RECOVERY", fmt.Sprintf("Monitor '%s' is UP", site.Name))
if !inMaint {
e.triggerAlert(site.AlertID, "✅ RECOVERY", fmt.Sprintf("Monitor '%s' is UP", site.Name))
} else {
e.AddLog(fmt.Sprintf("Monitor '%s' recovered (maintenance active, alert suppressed)", site.Name))
}
}
}
@@ -432,6 +446,24 @@ func (e *Engine) triggerAlert(alertID int, title, message string) {
}
}
func (e *Engine) isInMaintenance(monitorID int) bool {
inMaint, err := e.db.IsMonitorInMaintenance(monitorID)
if err != nil {
return false
}
return inMaint
}
func (e *Engine) GetDisplayStatus(site models.Site) string {
if site.Paused {
return "PAUSED"
}
if e.isInMaintenance(site.ID) {
return "MAINT"
}
return site.Status
}
func (e *Engine) checkGroup(site models.Site) {
e.mu.RLock()
status := "UP"