wow a lot of changes happend since I set this up in October. I locked down the Prometheus version to 0.16.1, fixed the docker-compose to align the new config commands, and updated the prometheus.yml format to the new standard.

prom/Dockerfile

@@ -1,4 +1,4 @@
-FROM prom/prometheus:latest
+FROM prom/prometheus:0.16.1
 
 ADD prometheus.yml /etc/prometheus/prometheus.yml
 

prom/prometheus.yml

@@ -4,8 +4,9 @@ global:
   evaluation_interval: 15s # By default, scrape targets every 15 seconds.
   # scrape_timeout is set to the global default (10s).
 
-  # Attach these extra labels to all timeseries collected by this Prometheus instance.
-  labels:
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  external_labels:
       monitor: 'codelab-monitor'
 
 # Load and evaluate rules in this file every 'evaluation_interval' seconds.
@@ -27,4 +28,4 @@ scrape_configs:
     # scheme defaults to 'http'.
 
     target_groups:
-      - targets: ['localhost:9090','exporter:9104','cadvisor:8080']
+      - targets: ['localhost:9090','cadvisor:8080']