Removes a few relabel_configs for the kubernetes-pods job that don't …

…apply to the platform cluster (but maybe do to the GKE clusters). (#239)

config/prometheus/prometheus.yml

@@ -127,26 +127,12 @@ scrape_configs:
         action: replace
         target_label: namespace
 
-      # Add the GKE node name.
-      - source_labels: [__meta_kubernetes_pod_node_name]
-        action: replace
-        target_label: node
-
       # Add a machine label to make it easier to join these metrics with
       # existing metrics that use machine instead of the node label.
       - source_labels: [__meta_kubernetes_pod_node_name]
         action: replace
         target_label: machine
 
-      # TODO: find a better source of this information or remove it. The value
-      # returned is incomplete. Used only by Prometheus_SelfMonitoring.json.
-      # Extract the "<cluster>-<node-pool>" name from the GKE node name.
-      - source_labels: [__meta_kubernetes_pod_node_name]
-        action: replace
-        regex: gke-(.*)(-[^-]+){2}
-        replacement: $1
-        target_label: cluster
-
       # Identify the deployment name for replica set or daemon set.  Pods
       # created by deployments or daemon sets are processed here. The
       # following two rules recognize these two cases.