在kubernetes网络策略中,我们可以将Ingress值设置为空白数组,即[],也可以将值设置为-{}
使用这两个值有什么区别?
我尝试的第一个YAML-无效
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: internal-policy
spec:
podSelector:
matchLabels:
name: internal
policyTypes: ["Ingress","Egress"]
ingress: []
egress:
- to:
- podSelector:
matchLabels:
name: mysql
ports:
- protocol: TCP
port: 3306
在katacoda场景中回答的第二个YAML
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: internal-policy
namespace: default
spec:
podSelector:
matchLabels:
name: internal
policyTypes:
- Egress
- Ingress
ingress:
- {}
egress:
- to:
- podSelector:
matchLabels:
name: mysql
ports:
- protocol: TCP
port: 3306
答案 0 :(得分:0)
在两种情况下,您都已指定策略类型:入口和出口
ingress: []
此规则(为空),并且拒绝所有入口流量(如果规范中没有入口规则,则结果相同)。
您可以通过运行以下内容进行验证:
kubectl describe networkpolicy internal-policy
Allowing ingress traffic:
<none> (Selected pods are isolated for ingress connectivity)
ingress:
- {}
此规则允许所有入口流量:
kubectl describe networkpolicy internal-policy
Allowing ingress traffic:
To Port: <any> (traffic allowed to all ports)
From: <any> (traffic not restricted by source)
根据文档:Network Policies
入口规则: 每个NetworkPolicy都可以包括白名单进入规则的列表。每个规则都允许匹配“发件人”和“端口”部分的流量。
希望获得帮助。