How to set up HIGH AVAILABLITY for applications

[Young Hahn]

I am currently trying to build high availability for all the applications that my company is building.. 

all the applications are currently in AWS.. 

I want to use ELB to do this.. 

For example.. Confluence

So far.. I have exact same configuration files (installation directories and Home-directories) in 2 servers 

I was using one server until now.. 

When i try to access to the second server.. it is asking me to rebuild (even with all the same files)..

in this case.. do i have to create another database for it? 

how does Load Balancer work for this applications? 

[Nic Brough [Adaptavist]]

Really simple question to get us started - are you using Confluence Server, or Confluence Data Centre?

(And a partial answer - if it's Confluence server, you can NOT do load balancing...)

[Young Hahn]

@Nic Brough [Adaptavist] I am using the server.. so what will be the best way to do Confluence HA?

[Nic Brough [Adaptavist]]

Two options 1) Go to Confluence Data Centre instead ( See https://www.atlassian.com/enterprise/data-center/ ) 2) Accept that you can NOT cluster/load balance Confluence and build a system that is as close as you can get. On point 2, the best you can do is to have an active/passive config. One active Confluence server running normally, and a second *offline*. You can replicate the database behind them, and a lot of the data so that your failover process is "stop broken Confluence, flip the database from passive to activer, start second Confluence and re-index it", but you can't do active-active (You can, of course stick this behind a load balancer to handle traffic during failover)