Hi NIck, yes, many thanks, that helps a lot to verify what I discovered
later last night. Once I remembered Scalr DNS uses multiple entries for
allocation (as oppose to how regular DNS works) it all made clear sense,
i.e in the farm using an Nginx load balancer the DNS points to the Nginx
role while the corresponding vhosts just point to the app role, in the
single app farm everything (dns and vhosts) just point to the app role,
easy...!
Thanks again for helping me out :-)
Richard.
On 28/11/12 11:54, Nick Toursky wrote:
Hi Richard,
First, a farm doesn't require a DNS zone to be assigned to it.
Second, the combination of what you've suggested is recommended:
create DNS zones for TLD and all required subdomains and point them to
the relevant farms/roles, then create corresponding virtual hosts and
assign them to the app roles.
Hope that helps.
Regards,
Nick
On Tue, Nov 27, 2012 at 9:56 PM, RichBos <[email protected]
<mailto:[email protected]>> wrote:
Hi, I'm getting somewhat confused with how Scalr DNS hangs
together and wondered if anybody could advise. Here's what I
require (which sounds easy but for some reason I can't seem to get
my head round it today, it's either too much or not enough
coffee....!)
I need to -
1. Create x2 server farms - i.e farm1 (Nginx balancer + x2 app
servers + MySQL instance) and farm2 (no balancer, single app
server + MySQL instance).
2. Host the TLD of the domain in Scalr with the main website (i.e
'domain.com <http://domain.com>') on farm1 along with a selection
of sub domains (i.e one.domain.com <http://one.domain.com>,
two.domain.com <http://two.domain.com> etc).
3. Host a selection of other sub domains on farm2 (from the same
TLD), i.e three.domain.com <http://three.domain.com>,
four.domain.com <http://four.domain.com> (etc).
My confusion is this, do need to -
1. Create multiple subdomain 'domains' (alongside the TLD) and
allocate them accordingly to the relevant farms? (Farms need a
domain or domains allocating to them?).
2. Just create vhosts and point at the relevant app-servers?
3. A combination of 1 & 2?
...and, what extra (if any) DNS entries do I need to create
(manually?) for any/all of the (correct( selection above?).
I'm reluctant to map anything to EIPs (although I seem able to get
a degree of functionality by doing so), but if that's the way to
go (by creating A records to EIPs) I presume for the Nginx
balancer I'd allocate an EIP to that?
Just looking for the cleanest solution really, any advice appreciated.
Richard.
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