SSSD and Dynamic DNS - clarification

[Frank Pikelner]

Hello,

In my testing it would appear for Dynamic DNS to work (update DNS A and PTR
records), the Linux client hostsname needs to be FQDN (client123.domain.com)
defined as one of the hostnames in /etc/hosts for the 127.0.0.1 IP as:

[/etc/hosts]

127.0.0.1      client123.domain.com     client123    localhost.local
 localhost
172.16.5.10   client123.domain.com     client123


If I have something like, dynamic DNS does not appear to work:

[/etc/hosts]

127.0.0.1      localhost.local localhost
172.16.5.10   client123.domain.com     client123


The second /etc/hosts file should be correct but dynamic DNS is not
working. Is there something in the implementation that requires the first
case, or should just the order of the /etc/hosts entries modified so that
the localhost appears second in the list?

Frank