[Freeipa-users] sysctl and/or limits.conf?

Janelle janellenicole80 at gmail.com
Tue Oct 14 13:50:48 UTC 2014

Hi Rob,

Thanks for that - it clears up one point - and explains why the replica 
manage command shows all masters, but what I don't understand is how to 
get the CA to a "replica" once it is created? I don't see anything in 
the docs on that. Am I missing something very obvious here? I am coming 
from the AD world and trying to replace it, so please excuse my 
ignorance in this area.


On 10/14/14 6:48 AM, Rob Crittenden wrote:
> Janelle wrote:
>> Hi again,
>> A lot of this information has been very useful.  I did have a question I
>> could not answer. I noticed in the Deployment Recommendations docs, it
>> says not to have any more than 4 replication agreements. Perhaps I am
>> missing something, but I don't see how to get a replica to be a master
>> to be able to create another replicate?  Am I missing something obvious
>> here?
> Every IPA install is a master. The only distinction between servers are
> the optional services of DNS and a CA. So don't get confused by replica
> vs master. Once an IPA server is up it is a master.
> We don't recommend any one master to have more than 4 agreements. Each
> agreement adds a bit more load on the server to calculate the
> differences to send to each one, so you want to keep it reasonable. I'd
> recommend making a map of your topology to ensure that no master ends up
> alone, or one ends up being overloaded. You can use ipa-replica-manage
> to control the replication topology. By default a single agreement is
> set up between a new master and the one that created it.
> Any master can create a new master.
> As you do your installations be sure to have at least 2 masters with a
> CA on it to avoid a single point of failure.
> rob
>> Thank you,
>> ~Janelle
>> On 10/13/14 3:18 PM, Dmitri Pal wrote:
>>> On 10/12/2014 08:07 PM, James wrote:
>>>> On 12 October 2014 19:55, Janelle <janellenicole80 at gmail.com> wrote:
>>>>> Hi again,
>>>>> I was wondering if there were any suggestions for performance of IPA
>>>>> and
>>>>> settings to sysctl and maybe limits.conf? I tried the website, but
>>>>> did not
>>>>> see anything.  Have about 3000 servers that will be talking to 3-4
>>>>> masters/replicas. Are there any formulas to follow?
>>>>> thanks
>>>> If you get an answer to this, or if you know of any other performance
>>>> tuning params, let me know and I'll build it in to puppet-ipa.
>>>> Thanks,
>>>> James
>>> I do not think it is easy automatable.
>>> Please see http://www.freeipa.org/page/Deployment_Recommendations and
>>> part about replicas.
>>> If 3000 in one datacenter then 3 is good enough or 4 if you are very
>>> LDAP heavy (some applications are like Jira for example).
>>> If you have 2 data center I would go for 2+2.

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