|
Hi, I’m trying to create a high availability ldap for a system
I have in place that is currently using multimaster replication. Using a shared
storage system isn’t an option in this case. To give you an idea of what our setup looks like, There are two nodes, that have replication set up. These
are set up as multimasters and have processes that write to both of them. These
changes replicate to the other ldap server. Now I need them to be in a high availability configuration. I have created duplicates of each node and gotten the high availability
portion on each of them to work correctly. The problem comes with fedora and replication. I have tried multiple ways of setting up fedora and
replication and they always seem to end up with changes not being replicated to
the other master when we have failed over to the secondary node. The two most
successful one’s are below Configurations. Full
Mesh: All links were set up as a two way replication. This
always ends up with at least 2 nodes showing errors saying it “Can't
locate CSN” or “Duplicate node ID” Node1A
------- Node1B
|
\
/ |
|
X |
|
/ \ | Node2A
------- Node2B Single
replication agreement between VIPs In
this configuration, we initially copied over the slapd instance directory on
setup of the second HA node (Node1A to Node1B) so that the settings and
configurations are identical on both. Then as changes were made to the ldap, we
created backups using db2bak. These backups are copied over to the failover box
and then imported on startup of fedora ds. This doesn’t appear to backup
the changelog and ends up with an error saying “Can’t locate CSN”
again. Node1
VIP
|
| Node2
VIP I have tried other things as well and they were a lot less fruitful
than the two examples I have here. Has anyone set up a high availability scenario similar to
this? Can anyone suggest a different process or configuration that would
accomplish what I’m after? Thanks, Casper |
-- 389 users mailing list 389-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-directory-users
