only override with nslabels if podlabel doesn't exist

go.sum

@@ -557,6 +557,7 @@ k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719/go.mod h1:I4A+glKBHiTgiEj
 k8s.io/apimachinery v0.0.0-20190913075812-e119e5e154b6 h1:tGU1C/vMoUV2ZakSH6wQq2shk9KiFtjoH2vDDHlhpA4=
 k8s.io/apimachinery v0.0.0-20190913075812-e119e5e154b6/go.mod h1:nL6pwRT8NgfF8TT68DBI8uEePRt89cSvoXUVqbkWHq4=
 k8s.io/apimachinery v0.18.6 h1:RtFHnfGNfd1N0LeSrKCUznz5xtUP1elRGvHJbL3Ntag=
+k8s.io/apimachinery v0.19.0 h1:gjKnAda/HZp5k4xQYjL0K/Yb66IvNqjthCb03QlKpaQ=
 k8s.io/client-go v0.0.0-20190404172613-2e1a3ed22ac5 h1:BwY2C//EoWktJi74O6R2REBonrhsfhRI0qfVwOjOPp8=
 k8s.io/client-go v0.0.0-20190404172613-2e1a3ed22ac5/go.mod h1:bIEHXHbykaOlj+pgLllzLJ2RPGdzkjtqdk0Il07KPEM=
 k8s.io/client-go v0.0.0-20190620085101-78d2af792bab h1:E8Fecph0qbNsAbijJJQryKu4Oi9QTp5cVpjTE+nqg6g=

pkg/costmodel/costmodel.go

@@ -448,7 +448,9 @@ func (cm *CostModel) ComputeCostData(cli prometheusClient.Client, clientset kube
 			}
 
 			for k, v := range nsLabels {
-				podLabels[k] = v
+				if _, ok := podLabels[k]; !ok {
+					podLabels[k] = v
+				}
 			}
 
 			nodeName := pod.Spec.NodeName
@@ -1926,7 +1928,9 @@ func (cm *CostModel) costDataRange(cli prometheusClient.Client, clientset kubern
 		}
 
 		for k, v := range namespaceLabels {
-			pLabels[k] = v
+			if _, ok := pLabels[k]; !ok {
+				pLabels[k] = v
+			}
 		}
 
 		var podDeployments []string