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From Sanjeev Neelarapu <sanjeev.neelar...@citrix.com>
Subject RE: Internal DNS confusion
Date Tue, 28 Jan 2014 14:03:49 GMT
Network domain does not require an entry in internal DNS. That will be taken care by VR.

-----Original Message-----
From: chris snow [mailto:chsnow123@gmail.com] 
Sent: Tuesday, January 28, 2014 12:48 PM
To: users@cloudstack.apache.org
Subject: Re: Internal DNS confusion

Thanks for the answers Shanker. Some more questions ...

Are internal DNS lookups performed only by the system vms?  If no, what other parts of cloudstack
perform internal DNS lookups?  For example, does Management Server perform internal DNS lookups?

I'm trying to figure out 'when' I need to add new records to the internal DNS server.

I guess one way for me to understand when I need to add a host record to the internal DNS
is by knowing what which parts of the Cloudstack admin interface have fields that require
a corresponding internal DNS record.  For example:

   Network > Add Guest Network > Network Domain
   Domains > Add Domain > Network Domain

Does each network domain above require an entry to be added into the internal DNS?  Are there
any other places in the admin UI that require records to be added to the internal DNS server?

On Tue, Jan 28, 2014 at 3:52 AM, Shanker Balan <shanker.balan@shapeblue.com> wrote:
> Comments inline.
>
> On 28-Jan-2014, at 1:21 am, chris snow <chsnow123@gmail.com> wrote:
>
>> When creating a new zone, I have to enter the address for Internal 
>> DNS Servers.  Extract from the Cloudstack installation manual:
>>
>> "Internal DNS 1 and Internal DNS 2. These are DNS servers for use by 
>> system VMs in the zone (these are VMs used by CloudStack itself, such 
>> as virtual routers, console proxies, and Secondary Storage VMs.)."
>
> The internal DNS server is usually the corporate DNS servers that 
> provide "internal" DNS services for your LAN. Usually, these are 
> RFC1918 IPs which is why its hosted "internally".
>
>
>> Question 1: Who manages the Internal DNS? Is an Internal DNS server 
>> setup and managed by me, or is it setup and managed by Cloudstack?
>
> You (or your IT team).
>
>
>> Question 2: If Internal DNS is setup and managed by me, how should it be setup?
>
> set it up any way you look. As long as the internal DNS server can 
> resolve the hostname to IP addresses, you should be fine.
>
>
>> Question 3: If it is setup and managed by Cloudstack, when did it get 
>> setup, and  how can I find out what address Cloudstack is using for 
>> this server?
>
> Its not managed by cloudstack. Most of the time, your internal and 
> external DNS settings would be your corporate DNS server.
>
> If a public DNS server can resolve IP addresses for hosts in your LAN, 
> you can use any public DNS server as your internal and external DNS resolver.
>
> Hope that makes sense.
>
>
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