When there is no DNS server in your infrastructure, How do you make ansible remote hosts be aware of each other server’s IP address.

Yes, The local DNS or /etc/hosts file is the only option

This video talks about how to update the /etc/hosts file across the ansible remote servers to enable DNS lookup between the host group members.

As a Result. Each remote host would be able to connect to the remote server using their hostname and not just IP.

Theoretical explanation of this post can be found here

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