Add a helper to generate legacy configuration

This moves the DefaultConfig method out into a helper to generate legacy
configuration.  Passing in a config file is now required.

deploy/manifests/custom-metrics-apiserver-deployment.yaml

@@ -28,15 +28,21 @@ spec:
         - --logtostderr=true
         - --prometheus-url=http://prometheus.prom.svc:9090/
         - --metrics-relist-interval=30s
-        - --rate-interval=5m
         - --v=10
+        - --config=/default-config.yaml
         ports:
         - containerPort: 6443
         volumeMounts:
         - mountPath: /var/run/serving-cert
           name: volume-serving-cert
           readOnly: true
+        - mountPath: /etc/adapter/
+          name: config
+          readOnly: true
       volumes:
       - name: volume-serving-cert
         secret:
           secretName: cm-adapter-serving-certs
+      - name: config
+        configMap:
+          name: adapter-config

deploy/manifests/custom-metrics-config-map.yaml

@@ -0,0 +1,74 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: adapter-config
+  namespace: custom-metrics
+data:
+  config.yaml: |
+    rules:
+    - seriesQuery: '{__name__=~"^container_.*",container_name!="POD",namespace!="",pod_name!=""}'
+      seriesFilters: []
+      resources:
+        overrides:
+          namespace:
+            resource: namespace
+          pod_name:
+            resource: pod
+      name:
+        matches: ^container_(.*)_seconds_total$
+        as: ""
+      metricsQuery: sum(rate(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}[5m]))
+        by (<<.GroupBy>>)
+    - seriesQuery: '{__name__=~"^container_.*",container_name!="POD",namespace!="",pod_name!=""}'
+      seriesFilters:
+      - isNot: ^container_.*_seconds_total$
+      resources:
+        overrides:
+          namespace:
+            resource: namespace
+          pod_name:
+            resource: pod
+      name:
+        matches: ^container_(.*)_total$
+        as: ""
+      metricsQuery: sum(rate(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}[5m]))
+        by (<<.GroupBy>>)
+    - seriesQuery: '{__name__=~"^container_.*",container_name!="POD",namespace!="",pod_name!=""}'
+      seriesFilters:
+      - isNot: ^container_.*_total$
+      resources:
+        overrides:
+          namespace:
+            resource: namespace
+          pod_name:
+            resource: pod
+      name:
+        matches: ^container_(.*)$
+        as: ""
+      metricsQuery: sum(<<.Series>>{<<.LabelMatchers>>,container_name!="POD"}) by (<<.GroupBy>>)
+    - seriesQuery: '{namespace!="",__name__!~"^container_.*"}'
+      seriesFilters:
+      - isNot: .*_total$
+      resources:
+        template: <<.Resource>>
+      name:
+        matches: ""
+        as: ""
+      metricsQuery: sum(<<.Series>>{<<.LabelMatchers>>}) by (<<.GroupBy>>)
+    - seriesQuery: '{namespace!="",__name__!~"^container_.*"}'
+      seriesFilters:
+      - isNot: .*_seconds_total
+      resources:
+        template: <<.Resource>>
+      name:
+        matches: ^(.*)_total$
+        as: ""
+      metricsQuery: sum(rate(<<.Series>>{<<.LabelMatchers>>}[5m])) by (<<.GroupBy>>)
+    - seriesQuery: '{namespace!="",__name__!~"^container_.*"}'
+      seriesFilters: []
+      resources:
+        template: <<.Resource>>
+      name:
+        matches: ^(.*)_seconds_total$
+        as: ""
+      metricsQuery: sum(rate(<<.Series>>{<<.LabelMatchers>>}[5m])) by (<<.GroupBy>>)