(计算机)Ingress

Ingress 和 egress 的中文意思分别为 进入 和 出去。[^1]

在 AWS 云服务中，Ingress 指 inbound traffic (进入流量)， egress 指 outbound traffic (出去流量)。AWS 中可以指定 ingress 和 egress 的规则。[^2]

在 K8s 中，Ingress 是指一个 API资源。Ingress 使得 cluster外部 能访问 内部的 HTTP 和 HTTPS routes路由器，并且 Ingress 定义了 流量路由 (Traffic routing) 的规则。[^3][^4] 换言之，k8s 的 Ingress 包含的内容以及范围比 AWS 中的 ingress 要大。

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cluster

Ingress-managed
load balancer

routing rule

Ingress

Pod

Service

Pod

client

参考 References

[^1]: ingress - Weblio英和辞書 [^2]: [[AWS::EC2::SecurityGroup Ingress - AWS CloudFormation](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group-rule-1.html#:~:text=Specifies an inbound rule for,with the specified security group.) [^3]: Kubernetes Ingress with AWS ALB Ingress Controller [^4]: Kubernetes Ingress