[Freeipa-users] bind-dyndb-ldap issues

[Brendan Kearney]

On 10/12/2016 02:35 AM, Petr Spacek wrote:
> Hello,
>
> these are debug messages and are harmless. Apparently you have verbose/debug
> messages enabled in named.conf:
>
>              arg "verbose_checks yes";
>
> If you want to get rid of these messages, just remove the line.
>
> What version of bind-dyndb-ldap are you using?
>
> Sufficiently new versions should use SyncRepl to pull all data from LDAP to
> memory (on start) so the read performance should be nearly identical as with
> plain BIND.
>
> Of course, writes/DNS updates will generate load on your LDAP server so the
> server needs to handle the load.
>
> Petr^2 Spacek
>
> On 11.10.2016 20:41, Brendan Kearney wrote:
>> i am using bind-dyndb-ldap on fedora 24 without FreeIPA, and continue to have
>> my logs swamped with errors about "check failed" from settings.c and fwd.c.  i
>> am completely up to date with every package, so the latest versions of
>> everything are installed.
>>
>> [settings.c : 420: setting_update_from_ldap_entry] check failed: ignore
>> [settings.c : 436: setting_update_from_ldap_entry] check failed: ignore
>> [fwd.c : 378: fwd_setting_isexplicit] check failed: not found
>>
>> i have two boxes running a named instance each, in a "master/master" config.
>> each has the zone data configured per below.  the uri refers to the local ip
>> of each server.
>>
>>      dynamic-db "bpk2.com" {
>>              library "ldap.so";
>>              arg "uri ldap://192.168.88.1/";
>>              arg "base cn=dns,ou=Daemons,dc=bpk2,dc=com";
>>              arg "auth_method simple";
>>              arg "bind_dn cn=dnsUser,dc=bpk2,dc=com";
>>              arg "password dnsPass";
>>
>>              arg "fake_mname server1.bpk2.com.";
>>              arg "dyn_update yes";
>>              arg "connections 2";
>>              arg "verbose_checks yes";
>>      };
>>
>>      zone "." IN {
>>          type hint;
>>          file "named.ca";
>>      };
>>
>>      include "/etc/named.rfc1912.zones";
>>
>> my dns container is defined in openldap as such:
>>
>> dn: cn=dns,ou=Daemons,dc=bpk2,dc=com
>> cn: dns
>> idnspersistentsearch: FALSE
>> idnszonerefresh: 30
>> objectclass: top
>> objectclass: nsContainer
>> objectclass: idnsConfigObject
>>
>> where and how can i find the source of my issue?  these issues are causing
>> performance issues on the rest of my network.  because of these errors, ldap
>> throws errors about deferred operations for binding, too many executing, and
>> pending operations.  additionally, recursion also seems to be impacted.  this
>> is noticed most when streaming content.  buffering, stuttering and pixelation
>> are seen in the video streams.  it could be the swamping of logs killing I/O
>> or the actual recurision, but 100% the video issues are related.  the log
>> events match up exactly with the buffering.
>>
>> i had this issue with bind-dyndb-ldap and fedora 20 up until i recently
>> upgraded.  i went from F20 to F24, and put things on nice new SSDs, instead of
>> spinning disks.  the problem followed the upgrade.  are there configuration
>> items i am missing?  are there tweaks i can do to improve something?  how do i
>> get rid of these errors, so dns performance (or the log swamping) is not
>> affecting the rest of my network?
>>
>> thank you,
>>
>> brendan

i am running 10.1.1 on F24.

why or how would those error logs be related to LDAP seeing an influx of 
updates, that wind up causing LDAP operations to queue up and require 
pended transactions, etc?    are there tweaks and tuning options i 
should have in my LDAP to manage this?

thanks,

brendan