Wednesday, August 17, 2022

[389-users] Re: DNA Plugin creating duplicates

Hi,


sorry to be late on that thread. DNA should prevent duplicate values via internal searches before allocating. If configured ranges from server are separated, DNA should not allocate duplicate. Is it possible that a direct update could set the attribute managed by DNA ?


regards
Thierry

On 8/11/22 9:59 PM, Merritt, Todd R - (tmerritt) wrote:
Yep, I just tested it out for haha's on my test directory instance after skimming the plugin source and seeing that it actually does does a range search using >=, <=. Sure enough that seems to have resolved it. It did work properly in the current configuration once upon a time so either my directory grew enough that the range search started to time out without the index or the range search was introduced in an update at some point. Thanks for the pointer!

Todd

From: Patrick M Landry <patrick.landry@louisiana.edu>
Sent: Thursday, August 11, 2022 12:55 PM
To: General discussion list for the 389 Directory server project. <389-users@lists.fedoraproject.org>
Subject: [EXT][389-users] Re: DNA Plugin creating duplicates
 

External Email

Sorry, I just double checked and I do​ have the integerOrderingMatch Matching Rule configured for uidNumber and gidNumber. I have no idea if that would make a difference for you or not.

--   Patrick Landry  Special Projects Engineer  University Computing Support Services  University of Louisiana at Lafayette  P.O. Box 43621  Lafayette, LA 70504  (337) 482-6402  patrick.landry@louisiana.edu  –––––––––––––––––––––––––  Universit√© des Acadiens


From: Merritt, Todd R - (tmerritt) <tmerritt@arizona.edu>
Sent: Thursday, August 11, 2022 2:26 PM
To: General discussion list for the 389 Directory server project. <389-users@lists.fedoraproject.org>
Subject: [389-users] Re: DNA Plugin creating duplicates
 
CAUTION: This email originated from outside of UL Lafayette. Do not click links or open attachments unless you recognize the sender and know the content is safe.

Thanks, that's a good thought. It looks like I do have the index set up though.

dn: cn=uidnumber,cn=index,cn=userroot,cn=ldbm database,cn=plugins,cn=config
cn: uidnumber
nsIndexType: eq
nsSystemIndex: False
objectClass: top
objectClass: nsIndex

Does the index also need to support nsMatchingRule: integerOrderingMatch for inequality searching?

Todd

From: Patrick M Landry <patrick.landry@louisiana.edu>
Sent: Thursday, August 11, 2022 12:16 PM
To: General discussion list for the 389 Directory server project. <389-users@lists.fedoraproject.org>
Subject: [EXT][389-users] Re: DNA Plugin creating duplicates
 

External Email

It has been a long time since I set this up and I am running an older version of the server but I did find this in my notes:

Before assigning a number to a new entry the DNA plugin searches the directory to ensure that the number is not already being used. For this reason indexes had to be created for all of the attributes which the DNA plugin can assign values to.

Perhaps that is it?
--   Patrick Landry  Special Projects Engineer  University Computing Support Services  University of Louisiana at Lafayette  P.O. Box 43621  Lafayette, LA 70504  (337) 482-6402  patrick.landry@louisiana.edu  –––––––––––––––––––––––––  Universit√© des Acadiens


From: Merritt, Todd R - (tmerritt) <tmerritt@arizona.edu>
Sent: Thursday, August 11, 2022 12:51 PM
To: 389-users@lists.fedoraproject.org <389-users@lists.fedoraproject.org>
Subject: [389-users] DNA Plugin creating duplicates
 
CAUTION: This email originated from outside of UL Lafayette. Do not click links or open attachments unless you recognize the sender and know the content is safe.

Hi,

I'm running 389ds 2.0.15 on a two node cluster in a multi master mode. I'm using the DNA plugin to generate unique uid numbers for new accounts. Each directory instance is assigned a unique range of uid numbers. It works in so far as it assigns a uid number when it gets the magic token but whatever is supposed to be verifying that the uid number is not already assigned is not working. I've cranked the error log level up, but I don't get anything in the logs that is helpful in determining why that validation is not working correctly. 

# ansible-managed-uidnumber-generation, Distributed Numeric Assignment Plugin,
 plugins, config
dn: cn=ansible-managed-uidnumber-generation,cn=Distributed Numeric Assignment
 Plugin,cn=plugins,cn=config
objectClass: top
objectClass: dnaPluginConfig
cn: ansible-managed-uidnumber-generation
dnaType: uidNumber
dnaNextValue: 62009
dnaMaxValue: 131000
dnaMagicRegen: generate
dnaFilter: (objectclass=posixAccount)
dnaScope: ou=Accounts,dc=example,dc=edu
dnaSharedCfgDN: ou=ranges,ou=Accounts,dc=example,dc=edu

I'm stumped. Anyone have any direction on how to debug this further?

Thanks!
Todd

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