Update naming.

Signed-off-by: Ben Kochie <superq@gmail.com>

example-rules.yml

@@ -2,17 +2,17 @@ groups:
 - name: example-node-exporter-rules
   rules:
   # The count of CPUs per node, useful for getting CPU time as a percent of total.
-  - record: instance:node_cpu_seconds_total:count
+  - record: instance:node_cpus:count
     expr: count(node_cpu_seconds_total{mode="idle"}) without (cpu,mode)
 
   # CPU in use by CPU.
-  - record: instance_cpu:node_cpu_seconds_total:rate5m
+  - record: instance_cpu:node_cpu_seconds_not_idle:rate5m
     expr: sum(rate(node_cpu_seconds_total{mode!="idle"}[5m])) without (mode)
 
   # CPU in use by mode.
-  - record: instance_mode:node_cpu_seconds_total:rate5m
+  - record: instance_mode:node_cpu_seconds:rate5m
     expr: sum(rate(node_cpu_seconds_total[5m])) without (cpu)
 
   # CPU in use ratio.
   - record: instance:node_cpu_seconds_total_in_use:ratio
-    expr: sum(instance_mode:node_cpu_seconds_total:rate5m{mode!="idle"}) / instance:node_cpu_seconds_total:count
+    expr: sum(instance_mode:node_cpu_seconds:rate5m{mode!="idle"}) / instance:node_cpus:count