xintongsong commented on issue #11284: [FLINK-15911][runtime] Make Flink work with NAT. URL: https://github.com/apache/flink/pull/11284#issuecomment-602363516 @tillrohrmann, I have addressed your comments. However, I'm still trying to understand how the following is a common need. > What we actually need is that for a given TM `t` all other TMs `t'` can resolve the address of `t`. I find it not natural to simulate the above scenario with Docker in the e2e test. For each container I have to manually add the hostname-ip entries of all other containers except for itself. Say all the JM and TMs are running in Docker containers. If a given TM `t` cannot resolve its own external address from inside the container, then unless specifically configured like I did in the e2e test, how could the JM and all the other TMs `t'`, which are also inside containers, resolve the address of `t`? If `t'` can resolve the address of `t` by using the same DNS settings as its host, then shouldn't `t'` also use the same DNS settings as its host and be able to resolve its own address?
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