Revert "Use canonical hostname instead of ip by default (#16386)" #17348
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This reverts commit 9459722.
The effect of PR #16386 is that by default, services would advertise themselves with localhost instead of their IP address and because of that, services in docker no longer can discover each other. I ran into this issue while verifying the docker image of 31 RC 1. We don't see this being an issue in IT because there, druid.host is already set to the container name.