Add rules files to prometheus dynamically

This dynamically adds the rules files for prometheus to the
prometheus-etc configmap, and also dynamically adds volume mounts
to the prometheus statefulset for each rules file

This also removes the empty rules file trees in the prometheus
values.yaml file

Change-Id: I9acbbe57d71a23f69e9e172b2f3ad66985e99574

prometheus/templates/configmap-etc.yaml

@@ -24,26 +24,8 @@ metadata:
 data:
   prometheus.yml: |+
 {{ toYaml .Values.conf.prometheus.scrape_configs | indent 4 }}
-  alertmanager.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.alertmanager | indent 4 }}
-  etcd3.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.etcd3 | indent 4 }}
-  kube-apiserver.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.kube_apiserver | indent 4 }}
-  kube-controller-manager.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.kube_controller_manager | indent 4 }}
-  kubelet.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.kubelet | indent 4 }}
-  kubernetes.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.kubernetes | indent 4 }}
-  rabbitmq.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.rabbitmq | indent 4 }}
-  mysql.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.mysql | indent 4 }}
-  ceph.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.ceph | indent 4 }}
-  openstack.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.openstack | indent 4 }}
-  custom.rules: |+
-{{ toYaml .Values.conf.prometheus.rules.custom | indent 4 }}
+{{ range $key, $value := .Values.conf.prometheus.rules }}
+  {{ $key }}.rules: |+
+{{ toYaml $value | indent 4 }}
+{{ end }}
 {{- end }}

prometheus/templates/statefulset.yaml

@@ -92,50 +92,12 @@ spec:
               mountPath: /etc/config
             - name: rulesprometheus
               mountPath: /etc/config/rules
+            {{- range $key, $value := .Values.conf.prometheus.rules }}
             - name: prometheus-etc
-              mountPath: /etc/config/rules/alertmanager.rules
-              subPath: alertmanager.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/etcd3.rules
-              subPath: etcd3.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/kubernetes.rules
-              subPath: kubernetes.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/kube-apiserver.rules
-              subPath: kube-apiserver.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/kube-controller-manager.rules
-              subPath: kube-controller-manager.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/kubelet.rules
-              subPath: kubelet.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/rabbitmq.rules
-              subPath: rabbitmq.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/mysql.rules
-              subPath: mysql.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/ceph.rules
-              subPath: ceph.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/openstack.rules
-              subPath: openstack.rules
-              readOnly: true
-            - name: prometheus-etc
-              mountPath: /etc/config/rules/custom.rules
-              subPath: custom.rules
+              mountPath: /etc/config/rules/{{ $key }}.rules
+              subPath: {{ $key }}.rules
               readOnly: true
+            {{- end }}
             - name: prometheus-etc
               mountPath: /etc/config/prometheus.yml
               subPath: prometheus.yml

prometheus/values.yaml

@@ -207,15 +207,9 @@ conf:
         - /etc/config/rules/alertmanager.rules
         - /etc/config/rules/etcd3.rules
         - /etc/config/rules/kubernetes.rules
-        - /etc/config/rules/kube-apiserver.rules
-        - /etc/config/rules/kube-controller-manager.rules
+        - /etc/config/rules/kube_apiserver.rules
+        - /etc/config/rules/kube_controller_manager.rules
         - /etc/config/rules/kubelet.rules
-        - /etc/config/rules/kube-scheduler.rules
-        - /etc/config/rules/rabbitmq.rules
-        - /etc/config/rules/mysql.rules
-        - /etc/config/rules/ceph.rules
-        - /etc/config/rules/openstack.rules
-        - /etc/config/rules/custom.rules
       scrape_configs:
         - job_name: kubelet
           scheme: https
@@ -768,8 +762,3 @@ conf:
             expr: histogram_quantile(0.5, sum(scheduler_binding_latency_microseconds_bucket) BY (le, cluster)) / 1e+06
             labels:
               quantile: "0.5"
-      rabbitmq: null
-      mysql: null
-      ceph: null
-      openstack: null
-      custom: null