[Samba] linux client DNS issues

[Rowland Penny]

On Mon, 2022-02-07 at 09:24 -0600, Patrick Goetz via samba wrote:
> Save for the issue of PTR DNS records not being automatically
> created 
> when joining a linux client to a Samba AD, I've had no problems
> joining 
> Ubuntu + Louis van Belle linux clients to a Samba domain using the 
> internal Samba DNS server.
> 
> At the moment, I'm working on joining an Arch linux client to a
> Samba 
> AD, and have run into an issue I didn't see on Ubuntu and want to
> find 
> out what the difference is. Note: nearly identical smb.conf files
> (only 
> the Shares differ) and same krb5.conf file.
> 
> When I attempt to join the Arch linux machine to the domain using
> `net 
> ads join`:
> 
> [root at erap-gnome samba]# net ads join -U administrator
> Password for [EA\administrator]:
> Using short domain name -- EA
> Joined 'ERAP-GNOME' to dns domain 'ea.linuxcs.com'
> No DNS domain configured for erap-gnome. Unable to perform DNS
> Update.
> DNS update failed: NT_STATUS_INVALID_PARAMETER
> 
> 
> I looked up NT_STATUS_INVALID_PARAMETER in the wiki, and the
> suggestion 
> was a missing or invalid host entry in /etc/hosts. I did indeed have
> a 
> typo in the machine's entry in /etc/hosts, but fixing the typo did
> not 
> resolve the issue. I get the same (or similar) error message when 
> attempting to rejoin the machine to the domain. The machine is added
> to 
> the domain, but no DNS A record is generated for it.
> 
> I also tried using:
> 
>    # samba-tool domain join ea.linuxcs.com MEMBER -U Administrator
> 
> Using samba-tool there's no error message, but also no DNS entry:

This possibly has the same problem as when you join a red-hat OS to
Samba AD, you get the same message. Try checking that /etc/hostname
contains the computers FQDN, this works on red-hat.

Rowland