networking - 如何使用容器中的主机IP？

Question

在使用主机网络选项运行的容器中，可以使用容器中的主机网络接口(interface)及其 IP，并通过该接口(interface)和 IP 联系外部网络。因此，如果一台主机配置了多个 IP，容器可以选择使用哪一个。

我可以对 Kubernetes 进行类似的设置并让容器使用主机 IP 吗？

注意:我需要从特定 IP 联系外部服务的流程，我不一定需要从外部 View 将这些 IP 分配给容器。

Answer 1

正如我在 Egress IP adress selection 中所写的那样:

One of the things that could help you solve it is Istio Egress Gateway so I suggest you look into it.

Otherwise, it is still dependent on particular platform and way to deploy your cluster. For example on AWS you can make sure your egress traffic always leaves from predefined, known set of IPs by using instances with Elastic IPs assigned to forward your traffic (be it regular EC2s or AWS NAT Gateways). Even with Egress above, you need some way to define a fixed IP for this, so AWS ElasticIP (or equivalent) is a must.