fixups from code review

integrations/prometheus/README.md

@@ -7,5 +7,6 @@ Requirements:
   - See Prometheus's
     [Getting Started](https://prometheus.io/docs/introduction/getting_started/)
     guide for instructions on how to set up a Prometheus server.
-  - A running Consul server, which will need to be added to this configuration
-    file.
+  - A running Consul server. This configuration is written for a local remote
+    Consul agent, and will need to be updated in the case Consul agent is on a
+    remote server.

integrations/prometheus/prometheus.yml

@@ -1,9 +1,5 @@
-global:
-  external_labels:
-    monitor: 'codelab-monitor'
-
 scrape_configs:
-  - job_name: 'nomad_data'
+  - job_name: 'nomad_metrics'
 
     consul_sd_configs:
     - server: 'localhost:8500'
@@ -18,5 +14,3 @@ scrape_configs:
     metrics_path: /v1/metrics
     params:
       format: ['prometheus']
-
-