Content-Type: application/merge-patch+json
{
    "spec": {
        "ingress": [{
            "from": [{
                "podSelector": {
                    "matchLabels": {
			"app": "nginx2"
	            }
                 }
             }]
        }]
     }
}  

响应示例：

{
    "kind": "NetworkPolicy",
    "apiVersion": "networking.k8s.io/v1",
    "metadata": {
	    "name": "test-network-policy",
		"namespace": "default",
		"selfLink": "/apis/networking.k8s.io/v1/namespaces/default/networkpolicies/test-network-policy",
		"uid": "be347ddd-e8af-11e8-b187-fa163e3cca63",
		"resourceVersion": "213982",
		"generation": 1,
		"creationTimestamp": "2018-11-15T08:23:34Z",
            "labels": {
		"app": "nginx"
			}
	},
    "spec": {
	    "podSelector": {
		"matchLabels": {
		    "app": "nginx"
		    }
	    },
	    "ingress": [{
		"from": [{
		    "podSelector": {
		        "matchLabels": {
			    "app": "nginx2"
				    }
			    }
		}],
	    "ports": [{
	        "protocol": "TCP",
		"port": 6379
		}]
	    }],
	    "policyTypes":[
		"Ingress"
        ]
    }
}