Adjust formatting in prometheus_for_dev

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

docs/monitoring_metrics/prometheus_for_dev.rst

@@ -92,21 +92,21 @@ For example:
 
 ::
 
-apiVersion: monitoring.coreos.com/v1
+    apiVersion: monitoring.coreos.com/v1
-kind: PrometheusRule
+    kind: PrometheusRule
-metadata:
+    metadata:
-  labels:
+      labels:
-    monitoring-key: cpe
+        monitoring-key: cpe
-  name: prometheus-application-monitoring-rules
+      name: prometheus-application-monitoring-rules
-spec:
+    spec:
-  groups:
+      groups:
-    - name: general.rules
+        - name: general.rules
-      rules:
+          rules:
-        - alert: AlertBodhi500Status
+            - alert: AlertBodhi500Status
-          annotations:
+              annotations:
-            summary: Alerting on too many server errors
+                summary: Alerting on too many server errors
-          expr: (100*sum(rate(pyramid_request_count{namespace="bodhi", path_info_pattern=~".*[^healthz]", status="500"}[20m]))/sum(rate(pyramid_request_count{namespace="bodhi", path_info_pattern=~".*[^healthz]"}[20m])))>1
+              expr: (100*sum(rate(pyramid_request_count{namespace="bodhi", path_info_pattern=~".*[^healthz]", status="500"}[20m]))/sum(rate(pyramid_request_count{namespace="bodhi", path_info_pattern=~".*[^healthz]"}[20m])))>1
-          labels:
+              labels:
-            severity: high
+                severity: high
 
-would alert if there is more than 1% responses with 500 status code.
+would alert if there is more than 1% responses with 500 status code.