xintongsong commented on issue #11284: [FLINK-15911][runtime] Make Flink work with NAT. URL: https://github.com/apache/flink/pull/11284#issuecomment-601536922 Thanks for the review @tillrohrmann. > A quick question for my understanding. In the e2e test we give every container an external address which is equal to the hosts ip address, right? How can the docker container route the packages for this address if the docker network does not happen to use the same subnet as the host's IP address? Can docker container talk to services running in the host's network? I guess I don't understand Docker good enough... As I understand, all the packages whose destination is not the docker network will be routed to the host. It depends on the host's setting whether and where to further route the package, which, without any special settings, should be simply forward the package like any other package sent from the host. Accessing other services running on the host should have no difference from accessing any public Internet address from inside a docker container.
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