feat(vault): Add new alert for vault (#1297)

* feat(vault): Add new alert for vault

Signed-off-by: Iago Santos Pardo <iago.santos.pardo@adfinis.com>

charts/vault-monitoring/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: vault-monitoring
 description: monitor your vault server from within Kubernetes' prometheus
 type: application
-version: 0.3.1
+version: 0.4.0
 home: https://github.com/adfinis/helm-charts/tree/main/charts/vault-monitoring
 sources:
   - https://github.com/adfinis/helm-charts/tree/main/charts/vault-monitoring
@@ -12,5 +12,5 @@ maintainers:
     url: https://adfinis.com
 annotations:
   artifacthub.io/changes: |
-    - kind: changed
-      description: "make bearerTokenFile toggleable"
+    - kind: added
+      description: "Add new metric for vault"

charts/vault-monitoring/values.yaml

@@ -120,3 +120,13 @@ prometheusRules:
       annotations:
         summary: High frequency of stored Vault token
         description: There has been an increased number of Vault token storing in the last 15 minutes
+    - alert: VaultLowFailureTolerance
+      expr: vault_autopilot_failure_tolerance == 0
+      for: 5m
+      labels:
+        severity: critical
+      annotations:
+        summary: "Vault Raft Cluster Failure Tolerance Critical on {{ $labels.instance }}"
+        description: >
+          "Vault Raft cluster on {{ $labels.instance }} has a failure tolerance of 0. Any further node
+          failure could result in loss of quorum and make the cluster unavailable."