devops-school · March 31, 2020 08:07 · Mar 31, 2020
diff --git a/Example-prometheus-Recording-Rule.yaml b/Example-prometheus-Recording-Rule.yaml
@@ -0,0 +1,101 @@
+Recording Rule Example 1
+================================
+# Aggregating up requests per second that has a path label:
+- record: instance_path:requests:rate5m
+  expr: rate(requests_total{job="myjob"}[5m])
+
+- record: path:requests:rate5m
+  expr: sum without (instance)(instance_path:requests:rate5m{job="myjob"})
+
+Recording Rule Example 2
+================================
+# Calculating a request failure ratio and aggregating up to the job-level failure ratio:
+- record: instance_path:request_failures:rate5m
+  expr: rate(request_failures_total{job="myjob"}[5m])
+
+- record: instance_path:request_failures_per_requests:ratio_rate5m
+  expr: |2
+      instance_path:request_failures:rate5m{job="myjob"}
+    /
+      instance_path:requests:rate5m{job="myjob"}
+
+# Aggregate up numerator and denominator, then divide to get path-level ratio.
+- record: path:request_failures_per_requests:ratio_rate5m
+  expr: |2
+      sum without (instance)(instance_path:request_failures:rate5m{job="myjob"})
+    /
+      sum without (instance)(instance_path:requests:rate5m{job="myjob"})
+
+# No labels left from instrumentation or distinguishing instances,
+# so we use 'job' as the level.
+- record: job:request_failures_per_requests:ratio_rate5m
+  expr: |2
+      sum without (instance, path)(instance_path:request_failures:rate5m{job="myjob"})
+    /
+      sum without (instance, path)(instance_path:requests:rate5m{job="myjob"})
+
+Recording Rule Example 3
+================================
+# Calculating average latency over a time period from a Summary:
+
+- record: instance_path:request_latency_seconds_count:rate5m
+  expr: rate(request_latency_seconds_count{job="myjob"}[5m])
+
+- record: instance_path:request_latency_seconds_sum:rate5m
+  expr: rate(request_latency_seconds_sum{job="myjob"}[5m])
+
+- record: instance_path:request_latency_seconds:mean5m
+  expr: |2
+      instance_path:request_latency_seconds_sum:rate5m{job="myjob"}
+    /
+      instance_path:request_latency_seconds_count:rate5m{job="myjob"}
+
+# Aggregate up numerator and denominator, then divide.
+- record: path:request_latency_seconds:mean5m
+  expr: |2
+      sum without (instance)(instance_path:request_latency_seconds_sum:rate5m{job="myjob"})
+    /
+      sum without (instance)(instance_path:request_latency_seconds_count:rate5m{job="myjob"})
+
+
+Recording Rule Example 5
+================================
+# Calculating the average query rate across instances and paths is done using the avg() function:
+
+- record: job:request_latency_seconds_count:avg_rate5m
+  expr: avg without (instance, path)(instance:request_latency_seconds_count:rate5m{job="myjob"})
+
+Recording Rule Example 6
+================================
+groups:
+  - name: custom_rules
+    rules:
+      - record: node_memory_MemFree_percent
+        expr: 100 - (100 * node_memory_MemFree_bytes / node_memory_MemTotal_bytes)
+
+      - record: node_filesystem_free_percent
+        expr: 100 * node_filesystem_free_bytes{mountpoint="/"} / node_filesystem_size_bytes{mountpoint="/"}
+
+
+Recording Rule Example 7
+================================
+groups:
+  - name: recording_rules
+    interval: 5s
+    rules:
+      - record: node_exporter:node_filesystem_free:fs_used_percents
+        expr: 100 - 100 * ( node_filesystem_free{mountpoint="/"} / node_filesystem_size{mountpoint="/"} )
+
+      - record: node_exporter:node_memory_free:memory_used_percents
+        expr: 100 - 100 * (node_memory_MemFree / node_memory_MemTotal)
+
+Recording Rule Example 8
+================================
+groups: 
+  - name: custom_rules 
+    rules: 
+      - record: node_memory_MemFree_percent 
+      expr: 100 - (100 * node_memory_MemFree_bytes / node_memory_MemTotal_bytes)
+      - record: node_filesystem_free_percent expr: 100 * node_filesystem_free_bytes{mountpoint="/"} / node_filesystem_size_bytes
+
+{mountpoint="/"}