fix namespace networkpolicy

1. allow egress when isolate is enabled
2. add nsnp prefix "nsnp-"
3. remove some useless log

Signed-off-by: Duan Jiong <djduanjiong@gmail.com>

pkg/controller/network/provider/ns_k8s.go

@@ -19,10 +19,11 @@ import (
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/klog"
+	"kubesphere.io/kubesphere/pkg/controller/network"
 )
 
 const (
-	defaultSyncTime = 5 * time.Minute
+	defaultSyncTime = 1 * time.Minute
 )
 
 func (c *k8sPolicyController) GetKey(name, nsname string) string {
@@ -231,9 +232,11 @@ func NewNsNetworkPolicyProvider(client kubernetes.Interface, npInformer informer
 		// Filter in only objects that are written by policy controller.
 		m := make(map[string]interface{})
 		for _, policy := range policies {
-			policy.ObjectMeta = metav1.ObjectMeta{Name: policy.Name, Namespace: policy.Namespace}
-			k := c.GetKey(policy.Name, policy.Namespace)
-			m[k] = *policy
+			if strings.HasPrefix(policy.Name, network.NSNPPrefix) {
+				policy.ObjectMeta = metav1.ObjectMeta{Name: policy.Name, Namespace: policy.Namespace}
+				k := c.GetKey(policy.Name, policy.Namespace)
+				m[k] = *policy
+			}
 		}
 
 		klog.Infof("Found %d policies in k8s datastore:", len(m))