maintenance(soteria): enable b2 usage scan config and alert

services/maintenance/soteria-configmap.yaml

@@ -12,3 +12,11 @@ data:
   SOTERIA_ALLOWED_GROUPS: admin,maintenance
   SOTERIA_BACKUP_MAX_AGE_HOURS: "24"
   SOTERIA_METRICS_REFRESH_SECONDS: "300"
+  SOTERIA_B2_ENABLED: "true"
+  SOTERIA_B2_SECRET_NAMESPACE: maintenance
+  SOTERIA_B2_SECRET_NAME: soteria-restic
+  SOTERIA_B2_ACCESS_KEY_FIELD: AWS_ACCESS_KEY_ID
+  SOTERIA_B2_SECRET_KEY_FIELD: AWS_SECRET_ACCESS_KEY
+  SOTERIA_B2_ENDPOINT_FIELD: AWS_ENDPOINTS
+  SOTERIA_B2_SCAN_INTERVAL_SECONDS: "900"
+  SOTERIA_B2_SCAN_TIMEOUT_SECONDS: "120"

services/monitoring/grafana-alerting-config.yaml

@@ -543,6 +543,54 @@ data:
               summary: "One or more PVCs are stale, missing, or failed per Soteria backup health"
             labels:
               severity: warning
+          - uid: maint-soteria-b2-scan-unhealthy
+            title: "Soteria B2 usage scan failing or stale"
+            condition: C
+            for: "15m"
+            data:
+              - refId: A
+                relativeTimeRange:
+                  from: 1800
+                  to: 0
+                datasourceUid: atlas-vm
+                model:
+                  expr: sum((((soteria_b2_scan_success < bool 1) and (time() - soteria_b2_scan_timestamp_seconds > 600)) or (time() - soteria_b2_scan_timestamp_seconds > 1800))) or on() vector(0)
+                  intervalMs: 60000
+                  maxDataPoints: 43200
+                  legendFormat: soteria-b2-scan-unhealthy
+                  datasource:
+                    type: prometheus
+                    uid: atlas-vm
+              - refId: B
+                datasourceUid: __expr__
+                model:
+                  expression: A
+                  intervalMs: 60000
+                  maxDataPoints: 43200
+                  reducer: last
+                  type: reduce
+              - refId: C
+                datasourceUid: __expr__
+                model:
+                  expression: B
+                  intervalMs: 60000
+                  maxDataPoints: 43200
+                  type: threshold
+                  conditions:
+                    - evaluator:
+                        params: [0]
+                        type: gt
+                      operator:
+                        type: and
+                      reducer:
+                        type: last
+                      type: query
+            noDataState: OK
+            execErrState: Alerting
+            annotations:
+              summary: "Soteria B2 consumption scan is failing or stale for >15m"
+            labels:
+              severity: warning
           - uid: maint-soteria-authz-denials
             title: "Soteria authorization denials elevated"
             condition: C