Re: remove unused schema from cn=config in n-way multi-master setup

[Quanah Gibson-Mount <quanah@zimbra.com>]

--On Monday, October 14, 2013 12:27 PM +0400 Igor Zinovik 
<zinovik.igor@gmail.com> wrote:

> In my setup write operations are directed only to single node of a
> cluster.
> I would like to ask for advice about my deletion plan.
> 0. Make backup of current cn=config and data
> 1. Disable replication via deletion olcServerID in cn=config and setting
> olcMirrorMode to FALSE
> 2. Direct write operations to third node
> 3. Stop slapd instance on first node
> 4. Edit configuration (remove custom schema from file, renumber siblings
> in cn=schema,cn=config)
> 5. Load new configuration into /etc/openldap/slapd.d
> 6. Start slapd instance on first node
> 7. Check that schema is absent in cn=config on first node
> 8. Repeat steps from 3-7 on second node
> 9. Direct write operations to first node
> 10. Repeat steps from 3-7 on third node
> 11. Turn on replication in cluster

Since delete on schema is not even supported in the 2.4 series, you have to 
remove it via slapcat/slapadd anyhow.

I would note that if there are zero references to the schema, and you are 
not replicating cn=config, then simply stopping slapd, updating the LDIF 
and reloading, should be sufficient on each server (i.e., no need to mess 
with serverID or olcMirrorMode).

--Quanah


--

Quanah Gibson-Mount
Architect - Server
Zimbra Software, LLC
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