Replace Heapster with Metrics API (#177)

* Replace Heapster with Metrics API call

* Add `n` factor

Metrics API likes to report CPU usage in `n`-suffixed units, so make
sure its represented correctly.

Author: wms

app/src/utils.js

@@ -1,6 +1,7 @@
 const PIXI = require('pixi.js')
 
 const FACTORS = {
+    'n': 1 / 1000 / 1000 / 1000,
     'm': 1 / 1000,
     'K': 1000,
     'M': Math.pow(1000, 2),

kube_ops_view/kubernetes.py

@@ -101,7 +101,7 @@ def query_kubernetes_cluster(cluster):
             unassigned_pods[pod_key] = obj
 
     try:
-        response = request(cluster, '/api/v1/namespaces/kube-system/services/heapster/proxy/apis/metrics/v1alpha1/nodes')
+        response = request(cluster, '/apis/metrics.k8s.io/v1beta1/nodes')
         response.raise_for_status()
         data = response.json()
         if not data.get('items'):
@@ -112,7 +112,7 @@ def query_kubernetes_cluster(cluster):
     except Exception as e:
         logger.warning('Failed to query node metrics {}: {}'.format(cluster.id, get_short_error_message(e)))
     try:
-        response = request(cluster, '/api/v1/namespaces/kube-system/services/heapster/proxy/apis/metrics/v1alpha1/pods')
+        response = request(cluster, '/apis/metrics.k8s.io/v1beta1/pods')
         response.raise_for_status()
         data = response.json()
         if not data.get('items'):