Comment 1 for bug 1856281

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Radosław Piliszek (yoctozepto) wrote : Re: Kolla-ansible deploy fails at rabbitmq because epmd does start

RabbitMQ spawns its own epmd for itself in the same container. Your issue is indeed different than the other's. Your /etc/hosts is just fine, same duplicates are fine. You can turn off kolla-ansible creating new by disabling hosts management but it is irrelevant in here.

Did you tweak anything related to networking in comparison to standard install?