I would some advice and how best to go about setting up a redundant infrastructure for my ldap consumer servers.
I work for a company that has remote offices around the world.
In our main office we have setup 2 OpenLDAP servers running 4.x version of the software in a MirrorMode configuration. I have load balancer which points a single VIP to the server that I want to be the authoritative writer at any point in time.
Around the world I have around 42 servers that I would like to slave off these master servers.
First off does anyone think having 42 slaves to a single master is going to kill the server. It is an 8 core box with gobs of RAM.
The other question is on how I obtain replication redundancy. Do I simply point my syncrepl provider to the VIP that hosts the master server. When the VIP re points in case the a server failure the salvea should just reconnect? Has anyone ever used 2 syncrepl stanzas against the same DIT. Something like below. This way the slaves always has a connection to both servers in the MirrorMode config. If one goes down then the other replication thread will continue getting updates. Is this a supported configor does it create a lot of conflicts in deciding who to get the updates from since it will receive 2 updates when both servers are live.
Thanks!
syncrepl rid=100 provider=ldap://master1.nyc.example.com:389 bindmethod=simple binddn="cn=repl,dc=nyc,dc=example,dc=com" credentials=secret type=refreshAndPersist searchbase="dc=nyc,dc=example,dc=com" retry="5 5 10 10 60 +" schemachecking=off
syncrepl rid=101 provider=ldap://master2.nyc.example.com:389 bindmethod=simple binddn="cn=repl,dc=nyc,dc=example,dc=com" credentials=secret type=refreshAndPersist searchbase="dc=nyc,dc=example,dc=com" retry="5 5 10 10 60 +" schemachecking=off