remove version label from node-exporter selectors

jsonnet/kube-prometheus/node-exporter/node-exporter.libsonnet

@@ -69,6 +69,11 @@ local k = import 'ksonnet/ksonnet.beta.4/k.libsonnet';
       local containerEnv = container.envType;
 
       local podLabels = $._config.nodeExporter.labels;
+      local selectorLabels = {
+        [labelName]: $._config.nodeExporter.labels[labelName]
+        for labelName in std.objectFields($._config.nodeExporter.labels)
+        if !std.setMember(labelName, ['app.kubernetes.io/version'])
+      };
 
       local existsToleration = toleration.new() +
                                toleration.withOperator('Exists');
@@ -133,7 +138,7 @@ local k = import 'ksonnet/ksonnet.beta.4/k.libsonnet';
       daemonset.mixin.metadata.withName('node-exporter') +
       daemonset.mixin.metadata.withNamespace($._config.namespace) +
       daemonset.mixin.metadata.withLabels(podLabels) +
-      daemonset.mixin.spec.selector.withMatchLabels(podLabels) +
+      daemonset.mixin.spec.selector.withMatchLabels(selectorLabels) +
       daemonset.mixin.spec.template.metadata.withLabels(podLabels) +
       daemonset.mixin.spec.template.spec.withTolerations([existsToleration]) +
       daemonset.mixin.spec.template.spec.withNodeSelector({ 'kubernetes.io/os': 'linux' }) +