Question

我正在使用Weave Net 2.4.0运行Kubernetes 1.9.6。我试图锁定对Kubernetes内部DNS服务器和另一台主机上的特定端口的访问。我似乎找不到适合出口的格式。

我知道以下内容不是有效的政策，只是我想做的事情的代表。如何编写网络策略以支持此操作？

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
    name: test-network-policy
    namespace: dev
spec:
    podSelector:
        matchLabels:
            app: plem-network-policy
policyTypes:
- Egress
egress:
- to:
    - ipBlock:
        cidr: 10.3.0.10/32
        ports:
        - protocol: TCP
        port: 53
        - protocol: UDP
        port: 53
    - ipBlock:
        cidr: 10.49.100.37/32
        ports:
        - protocol: TCP
        port: 8200

Answer 1

我没有对cidr和port的多个块给予足够的重视。这就是我想要的。

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
    name: test-network-policy
    namespace: dev
spec:
    podSelector:
      matchLabels:
        app: plem-network-policy
  policyTypes:
  - Egress
  egress:
  - to:
    - ipBlock:
        cidr: 10.2.0.0/16
    - ipBlock:
        cidr: 10.3.0.10/32
    ports:
    - protocol: UDP
      port: 53
    - protocol: TCP
      port: 53
  - to:
    - ipBlock:
        cidr: 10.49.100.37/32
    - ipBlock:
        cidr: 10.49.100.137/32
    - ipBlock:
        cidr: 10.49.100.85/32
    ports:
    - protocol: TCP
      port: 8200
  - to:
    - ipBlock:
        cidr: 10.29.30.56/32
    ports:
    - protocol: TCP
      port: 5439

Kubernetes网络策略出口仅允许使用某些IP和端口

1 个答案: