Merge pull request #70 from eduponte/version-2

Update configs to Prometheus v2

prometheus/alert.rules

@@ -1,11 +1,22 @@
 groups:
 - name: example
   rules:
-  - alert: InstanceDown
+
+  # Alert for any instance that is unreachable for >5 minutes.
+  - alert: service_down
     expr: up == 0
-    for: 5m
+    for: 2m
     labels:
       severity: page
     annotations:
       summary: "Instance {{ $labels.instance }} down"
-      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."
+      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 2 minutes."
+
+  - alert: high_load
+    expr: node_load1 > 0.5
+    for: 2m
+    labels:
+      severity: page
+    annotations:
+      summary: "Instance {{ $labels.instance }} under high load"
+      description: "{{ $labels.instance }} of job {{ $labels.job }} is under high load."

prometheus/prometheus.yml

@@ -11,7 +11,7 @@ global:
 
 # Load and evaluate rules in this file every 'evaluation_interval' seconds.
 rule_files:
-  - "alert.rules"
+  - 'alert.rules'
   # - "first.rules"
   # - "second.rules"