Merge pull request #8285 from ashumkin/label-selector

discovery/kubernetes: Fix valid label selector causing config error

config/testdata/kubernetes_selectors_pod.good.yml

@@ -6,3 +6,8 @@ scrape_configs:
           - role:  "pod"
             label: "foo=bar"
             field: "metadata.status=Running"
+      - role: pod
+        selectors:
+          - role:  "pod"
+            label: "foo in (bar,baz)"
+            field: "metadata.status=Running"

discovery/kubernetes/kubernetes.go

@@ -33,6 +33,7 @@ import (
 	"k8s.io/api/networking/v1beta1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
+	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/watch"
 	"k8s.io/client-go/kubernetes"
@@ -203,7 +204,7 @@ func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 		if err != nil {
 			return err
 		}
-		_, err = fields.ParseSelector(selector.Label)
+		_, err = labels.Parse(selector.Label)
 		if err != nil {
 			return err
 		}