Revert "openshift-prometheus: change node_exporter service port to 9101"

This reverts commit 167caab042e19938a5f1df713fa1b810754e2a7f.

Port 9101 has a conflict with node_exporter rbac proxy container.

roles/openshift_prometheus/files/node-exporter-template.yaml

@@ -37,9 +37,9 @@ objects:
     clusterIP: None
     ports:
     - name: scrape
-      port: 9101
+      port: 9100
       protocol: TCP
-      targetPort: 9101
+      targetPort: 9100
     selector:
       app: prometheus-node-exporter
 - apiVersion: extensions/v1beta1
@@ -67,9 +67,8 @@ objects:
           name: node-exporter
           args:
           - --no-collector.wifi
-          - --web.listen-address=:9101
           ports:
-          - containerPort: 9101
+          - containerPort: 9100
             name: scrape
           resources:
             requests:

roles/openshift_prometheus/templates/prometheus.yml.j2

@@ -232,7 +232,7 @@ scrape_configs:
       action: replace
       target_label: kubernetes_name
 
-# Scrape config for node-exporter, which is expected to be running on port 9101.
+# Scrape config for node-exporter, which is expected to be running on port 9100.
 - job_name: 'kubernetes-nodes-exporter'
 
   tls_config:
@@ -270,7 +270,7 @@ scrape_configs:
   relabel_configs:
   - source_labels: [__address__]
     regex: '(.*):10250'
-    replacement: '${1}:9101'
+    replacement: '${1}:9100'
     target_label: __address__
   - source_labels: [__meta_kubernetes_node_label_kubernetes_io_hostname]
     target_label: __instance__