anchor.diff:  - Kubernetes API server: https://github.com/kubernetes/kube-state-metrics
   - Node exporter: https://github.com/prometheus/node_exporter
   
  -Let's take a look at how we can see these metrics in the Prometheus dashboard.
  +Let's look at these these metrics in the Prometheus dashboard.
   
   . Find the master node in the EC2 console:
   +
   image::prometheus-ec2-nodes.png[]
   +
  -. Copy public IP address of the master node.
  -. Edit the security group and add a rule to allow inbound traffic on port 30900 as shown:
  -+
  -image::prometheus-ec2-security-group.png[]
  +. Copy public IP address of the master node as `<master-ip>`.
  +. Prometheus dashboard is accessible on port 30900. Edit the security group and add a rule to allow inbound traffic on port 30900 as shown:
  ++
  +image::prometheus-ec2-security-group.png[
   +
   . Prometheus dashboard is now available at http://<master-ip>:30900. In our case, this will be http://ec2-34-215-44-44.us-west-2.compute.amazonaws.com:30900 and looks like:
   +
  
positive.code: 
  http://prometheus.io/[Prometheus] is an open-source systems monitoring and alerting toolkit. Prometheus collects metrics from monitored targets by scraping metrics from HTTP endpoints on these targets.
  
  Different targets to scrape are defined in the Prometheus configuration file. Targets may be statically configured via the `static_configs` parameter in the configuration fle or dynamically discovered using one of the supported service-discovery mechanisms (Consul, DNS, Etcd, etc.).
  
  Prometheus gathers these metrics from https://github.com/kubernetes/kube-state-metrics[kube-state-metrics]. A wide variety of metrics are available and documented at https://github.com/kubernetes/kube-state-metrics/tree/master/Documentation.
  
  === Installation
  
  
negative.code: etcd-server-ip-172-20-48-121.us-west-2.compute.internal               1/1       Running   0          9h
  ```
  
  Other pods are shown as well, but we are only showing the etcd pods. Note down the name of the pod that starts with `etcd-server-ip`. Get more details about this pod:
  
    kubectl describe pod/etcd-server-ip-172-20-48-121.us-west-2.compute.internal --namespace=kube-system 
  
  