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From: Sanjeev Neelarapu <sanjeev.neelarapu@citrix.com>
To: "users@cloudstack.apache.org" <users@cloudstack.apache.org>
Subject: RE: Internal DNS confusion
Thread-Topic: Internal DNS confusion
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Date: Tue, 28 Jan 2014 14:03:49 +0000
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Network domain does not require an entry in internal DNS. That will be take=
n care by VR.

-----Original Message-----
From: chris snow [mailto:chsnow123@gmail.com]=20
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 oth=
er parts of cloudstack perform internal DNS lookups?  For example, does Man=
agement Server perform internal DNS lookups?

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

I guess one way for me to understand when I need to add a host record to th=
e internal DNS is by knowing what which parts of the Cloudstack admin inter=
face have fields that require a corresponding internal DNS record.  For exa=
mple:

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

Does each network domain above require an entry to be added into the intern=
al 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=20
>> DNS Servers.  Extract from the Cloudstack installation manual:
>>
>> "Internal DNS 1 and Internal DNS 2. These are DNS servers for use by=20
>> system VMs in the zone (these are VMs used by CloudStack itself, such=20
>> as virtual routers, console proxies, and Secondary Storage VMs.)."
>
> The internal DNS server is usually the corporate DNS servers that=20
> provide "internal" DNS services for your LAN. Usually, these are=20
> RFC1918 IPs which is why its hosted "internally".
>
>
>> Question 1: Who manages the Internal DNS? Is an Internal DNS server=20
>> 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=20
> resolve the hostname to IP addresses, you should be fine.
>
>
>> Question 3: If it is setup and managed by Cloudstack, when did it get=20
>> setup, and  how can I find out what address Cloudstack is using for=20
>> this server?
>
> Its not managed by cloudstack. Most of the time, your internal and=20
> external DNS settings would be your corporate DNS server.
>
> If a public DNS server can resolve IP addresses for hosts in your LAN,=20
> you can use any public DNS server as your internal and external DNS resol=
ver.
>
> Hope that makes sense.
>
>
> --
> @shankerbalan
>
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