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| Re: DNS primary/secondary control via LXadmin [message #36329 is a reply to message #36328] |
Mon, 01 September 2008 10:19   |
Lxhelp
Messages: 23691
Registered: July 2006 |
The Champion |
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Why do you need another software. If you configure lxadmin properly, lxadmin can trivially manage DJBdns on multiple servers.
thanks.
On Mon, Sep 01, 2008 at 02:16:43PM -0000, k0nan wrote:
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> hi
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> in lxadmin enterprise, we can assign the DNS role to a server.
> so, it would be "enough" to add SECONDARY DNS role to this architecture.
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| Re: DNS primary/secondary control via LXadmin [message #36337 is a reply to message #36335] |
Mon, 01 September 2008 11:35 |
Lxhelp
Messages: 23691
Registered: July 2006 |
The Champion |
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OF COURSE. DNS is a list of dns servers.
You can even check this for hyperVM. The dns values are automatically synced to ALL the dns servers configured.
On Mon, Sep 01, 2008 at 03:32:46PM -0000, k0nan wrote:
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> so you're saying that more than one LxAdmin slave can perform the DNS Role ?
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| Re: DNS primary/secondary control via LXadmin [message #62169 is a reply to message #36380] |
Tue, 14 April 2009 12:32 |
 blinkie 
Messages: 56
Registered: January 2009 |
Valuable Member |
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While it is true that LXAdmin will copy dns information to all configured dns servers for a domain (configured in LXAdmin), I'm at odds as to the current implementation.
Traditionally, a sysadmin would designate a primary server and then configure all secondary servers to receive updates from the primary. Now, if you had to update zone files manually (like we used to back in the day...) automatic zone transfers were obviously desirable. With a system like LXAdmin, which copies zone information to all dns servers in a kinda hackish way (by actually copying files instead of updates), you don't really need support for traditional secondary servers and zone transfers. The side effect, is that all of the secondaries appear as "Masters" or "primary" servers. Is this bad?
The fact is that in practice, the Internet doesn't really care about who is a primary and who is a secondary server. That is only important to the servers themselves so they know how to replicate the DNS database. So the LXAdmin implementation isn't necessarily bad. However... (you knew this was coming right?) ...
What does make the LXAdmin setup a problem is that it views the entire cluster (I'm talking about Enterprise) as an island. In larger organizations, it would make sense to be able to leverage some of the LXAdmin servers to help out with external duties. In the case of DNS, it would be desirable (it is here) to be able use some of the LXAdmin DNS servers as secondaries for other existing servers in the corporate domain. This is not currently possible, because there is no way to configure support for true secondary dns in LXAdmin. In other words, you can't configure an LXAdmin DNS server to pull information (i.e. perform zone transfers) from external primary dns servers.
Another fault is that on a real secondary server, a sysadmin can completely erase all local copies of zone files, then perform a reload and all zone files will be pulled again from primaries. This is a nice feature for when things get weird. How do you accomplish the same in LXAdmin?
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| Re: DNS primary/secondary control via LXadmin [message #62187 is a reply to message #35621] |
Tue, 14 April 2009 21:53 |
Ales 
Messages: 139
Registered: July 2008 |
Valuable Member |
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Will Lxadmin recreate the actual DNS records if they get deleted by hand?
Is it already possible to connect HyperVM and Lxadmin DNS servers to exchange DNS records?
Blinkie, we are using Cron and a small set of shell scripts to make our Plesk servers act as a master/slave to one another. I'm sure something similar could be implemented on Lxadmin servers in order to pull the records form third party servers. Not a very elegant solution but it can be set up in a few minutes...
[Updated on: Tue, 14 April 2009 21:54] Report message to a moderator |
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| Re: DNS primary/secondary control via LXadmin [message #62199 is a reply to message #62196] |
Tue, 14 April 2009 23:35 |
Lxhelp
Messages: 23691
Registered: July 2006 |
The Champion |
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Yes, a DNS only like in the case of Cpanel is being worked on.
thanks.
On Wed, Apr 15, 2009 at 02:46:39AM -0000, Blinkie wrote:
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> Yeah, I guess shell scripts could be used. Seems so 1990's...
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> But if you think about it, on LXAdmin Enterprise you could create a product just called "DNS" if the platform properly supported primary and secondary relationships. Secondary DNS, located in a geographically different place form the origination servers is highly desirable and it could easily be a service offering.
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> Another potential is for backup MX. I have subscribed to that in the past to get redundancy without having to build/maintain a system in colo facility. Unfortunately, LXAdmin doesn't even support multiple MX for itself right now.
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