Postfix + LDAP + Cluster

[Bryan O'Neal]

Good point for ldap - perhaps have a local ldap mirror in each server...

On Tue, Jun 1, 2010 at 8:36 PM, Ed <plug at 0x1b.com> wrote:
> Is this just a hot swap or some ghost servers?
>
> The best way is to set up your failover at the DNS level and at the
> LDAP cluster. A heartbeat can bring on the mirror postfix if the
> primary fails. You want to be dropping your LDAP info to a flat file
> for postfix to work from on a regular interval - no reason for postfix
> to stop if it can't reach the LDAP(s) "Temporary lookup failure".
> Also, I would guess there is a database in there somewhere for the
> email themselves - just make that a cluster too.
>
> I don't think Postfix is stateful on its own, just a queu that only
> clears an email after delivery is confirmed to the next queu. If the
> postfix machine dies before a message gets delivered, the message will
> still be in the delivery queu, ready to be delivered.
> or
> http://readlist.com/lists/postfix.org/postfix-users/13/67961.html
> or IPANY
> http://www.gossamer-threads.com/lists/linuxha/users/63864
>
>
> On Sun, May 30, 2010 at 7:57 PM, Bryan O'Neal
> <Bryan.ONeal at theonealandassociates.com> wrote:
>> Ok so I now have another postfix project (second one this week). This
>> one specifies the following - CentOS servers, virtual users, ldap
>> authentication (automatic user creation from ldap is a plus), and all
>> mail and configs must be synced with a second box for redundancy.
>>
>> The configs are just an rsync issue, any recommendations on syncing mail?
>>
>>
>> Any one want to give me there two cents or point to a favorite how too.
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