kube-prometheus: Fix double accounting of pod usage

cAdvisor exposes metrics for each cgroup hierachy step, and containers
are part of the respective pod's hierarchy, causing double accounting
when not filtered appropriately.

jsonnet/kube-prometheus/prometheus-adapter/prometheus-adapter.libsonnet

@@ -19,7 +19,7 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
       config: |||
         resourceRules:
           cpu:
-            containerQuery: sum(rate(container_cpu_usage_seconds_total{<<.LabelMatchers>>}[1m])) by (<<.GroupBy>>)
+            containerQuery: sum(rate(container_cpu_usage_seconds_total{<<.LabelMatchers>>,container_name!="POD",container_name!="",pod_name!=""}[1m])) by (<<.GroupBy>>)
             nodeQuery: sum(1 - rate(node_cpu_seconds_total{mode="idle"}[1m]) * on(namespace, pod) group_left(node) node_namespace_pod:kube_pod_info:{<<.LabelMatchers>>}) by (<<.GroupBy>>)
             resources:
               overrides:
@@ -31,7 +31,7 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
                   resource: pod
             containerLabel: container_name
           memory:
-            containerQuery: sum(container_memory_working_set_bytes{<<.LabelMatchers>>}) by (<<.GroupBy>>)
+            containerQuery: sum(container_memory_working_set_bytes{<<.LabelMatchers>>,container_name!="POD",container_name!="",pod_name!=""}) by (<<.GroupBy>>)
             nodeQuery: sum(node:node_memory_bytes_total:sum{<<.LabelMatchers>>} - node:node_memory_bytes_available:sum{<<.LabelMatchers>>}) by (<<.GroupBy>>)
             resources:
               overrides: