Re: no. of Views and Zones
On 10/31/2010 4:48 AM, Alans wrote: Have 2 questions, is there any limitation (beside hardware) on number of views? I mean creating a view/customer? And is there any limitation for number of zones/view? Since I didn't got exact answer for my questions, I was thinking if you can tell what is your largest number of views and zones that you used so far? regards, Alans ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: no. of Views and Zones
On 11/4/2010 12:22 AM, Alans wrote: >> On 10/31/2010 4:48 AM, Alans wrote: >> Have 2 questions, is there any limitation (beside hardware) on number of >> views? I mean creating a view/customer? >> And is there any limitation for number of zones/view? > > Since I didn't got exact answer for my questions, I was thinking if you > can tell what is your largest number of views and zones that you used so > far? sizeof(zone data) * count(views) -> memory required If you have enough memory, you can support whatever you need. Again, I think there's a better solution out there than bunches of views. AlanC signature.asc Description: OpenPGP digital signature ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
multi-master configuration?
How does multi-master configuration work? The scenario I have is three ISC
DHCP
servers configured for dynamic DNS, which also act as primary for the dynamic
zone (dyn.mydomain.com):
zone "dyn.mydomain.com" {
type master;
file "ddb.dyn.mydomain.com";
allow-update { key DHCP_UPDATER; };
};
These three dhcp/dns servers do not respond to DNS queries. My infrastructure
DNS consists of a DNS master (192.168.25.1) that is a slave for
dyn.mydomain.com:
zone "dyn.mydomain.com" {
type slave;
file "ddb.dyn.mydomain.com";
masters { 172.30.8.0; };
};
Obviously, I only have a single master listed above. I know I'll have to list
the other two, and set "multi-master yes".
The secondary servers that actually handle user dns requests slave to the
master
(192.168.25.1):
zone "dyn.mydomain.com" {
type slave;
file "ddb.dyn.mydomain.com";
masters { 192.168.25.1; };
};
So, to clarify my question. When I add the other two dhcp servers to the
masters{} list and set "multi-master yes" will this allow all three dhcp
servers
to update the dyn.mydomain.com zone? If so, do the three dhcp servers also
update each other?
Thanks for any insight.
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Re: BIND - Declare variable?
No. You can set a path in named.conf with the options { directory ...; };
statement, but that single path applies to all unqualified paths in named.conf.
You could, however, write this:
options {
directory "/var/named";
};
logging {
channel config_log {
file "log/config" [...];
};
channel database_log {
file "log/database" [...];
};
};
Your directory structure might include a symlink at /var/named/log pointing to
/var/log/dns.
Regards,
Chris Buxton
BlueCat Networks
On Nov 3, 2010, at 11:13 AM, Mike Cavanagh wrote:
> I do not think this is possible, but would like to confirm.
> I would like to declar a variable, and then use that variable elsewhere
> within the named.conf file.
>
> I have multiple “channel” definitions with “file” options. I want a variable
> for the path so I can change it once and update all entries:
> Example:
> channel config_log {
> file "/var/log/dns/config"
> versions 7
> size 20m
> ;
> channel config_log {
> file "/var/log/dns/config"
> versions 7
> size 20m
> ;
>
> I would like:
> FQPN=/var/log/dns
> channel config_log (
> File “$FQPN/config”
> Version 7
> Size 20m
> ;
> channel database_log {
> file “$FQPN/database"
> versions 7
> size 20m
> ;
>
> Obviously, I could take it even further with the version and size parameters.
> It would be great to reduce this down to:
> FQPN=/var/log/dns
> Ch_Opts=Version 7 Size 20m
>
> channel config_log (
> File “$FQPN/config” $Ch_Opts ;
> channel database_log {
> file “$FQPN/database" $Ch_Opts ;
>
> Thanks,
> Mike C
>
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Re: multi-master configuration?
On Nov 4, 2010, at 8:38 PM, Jiann-Ming Su wrote:
> So, to clarify my question. When I add the other two dhcp servers to the
> masters{} list and set "multi-master yes" will this allow all three dhcp
> servers
> to update the dyn.mydomain.com zone? If so, do the three dhcp servers also
> update each other?
No, this won't work with BIND. It just doesn't work this way. If you try it,
you will have three completely different and unrelated versions of the same
zone. There's no way for a slave to try to integrate the data, either.
Create a single hidden master name server. Configure al three DHCP servers to
update it. Or create three separate zones, one per DHCP server.
Regards,
Chris Buxton
BlueCat Networks
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