Explain about nameservers, a entry, etc.?

Question

Network administration

There is a vps (WHM/cPanel is installed) from a hoster (leaseweb.nl)
I want to create end user cPanel accounts there and direct certain domains to them.
I also want to use nameservers from the host.
hostname - kanga.leaseweb.nl
/etc/hosts -
127.0.0.1 localhost.localdomain localhost SERVER_IP kanga.leaseweb.nl
kanga some_end_user_domain.ru
/etc/resolv.conf 78.199 The last three are IP nameservers from leaseweb > ns1.leaseweb.nl 62.212.64.121 > ns5.leaseweb.nl 83.149.64.123 > ns4.leaseweb.net 62.212.78.199
The domain registrar at the some_end_user_domain.ru domain has the same nameservers
In /usr/local/apache/conf/httpd.conf there are the following virtual hosts
<VirtualHost SERVER_IP:80>
ServerName kanga.leaseweb.nl
DocumentRoot /usr/local/apache/htdocs
< VirtualHost *>
ServerName kanga.leaseweb.nl
DocumentRoot /usr/local/apache/htdocs
<VirtualHost SERVER_IP:80>
ServerName some_end_user_domain.ru
ServerAlias ​​www.some_end_user_domain.ru
DocumentRoot /home/some_end_user_domain/public_html
Is this a sufficient condition for everything to work? Or is something missing?
WHM swears as follows (it's also called /scripts/ipcheck )
The hostname (kanga.leaseweb.nl) resolves to 85.17.96.111. It
should resolve to SERVER_IP. Please be sure that the contents
of /etc/hosts are configured correctly, and also that there is a
correct 'A' entry for the domain in the zone file.
Some or all of these problems can be caused by /etc/resolv.conf
being setup incorrectly. Please check that file if you believe
everything else is correct.
You may be able to automatically correct this problem by using the
'Add an A entry for your hostname' option under 'Dns Functions' in
your Web Host Manager.
Add an A entry is set to IP - SERVER_IP
And if you do ping kanga.leaseweb.nl on the server itself - then it will resolve to SERVER_IP
If you do dig some_end_user_domain.ru then ANSWER SECTION and so on are missing.
In which direction to look, what can I miss or what do I not understand?

Answer 1

Something is not clear what you are trying to do ...
where is "Add an A entry set to IP - SERVER_IP" is set?
Where is the zone itself located and how do you edit it? on these NSs? or did you just assign these NSs to the domain because you had them in resolv.conf? if so, then you are very mistaken. Domain NSs should point to a DNS server with your domain's zone, which you can edit.

Answer 2

You're a little confused... the hoster provides you with DNS, not NS.
NS - must be on your server.
DNS - at the hoster, so that you can resolve other domains from the server.