I need to make cluster camunda (two apps from different servers see on some base)
Current config: camunda 7.9 with apache tomcat 9.0.47, jobexacutor enabled
I wanna copy camunda with tomcat on second server and what settings should I do?
Select nginx as load balancer, but say pls alternatives in your opinion
Best regards
UPD
So, I installed nginx at server1 where there is first part of camunda cluster. There is second camunda at server2.
Load balancing method was selected least_conn, added to default nginx conf:
upstream backend {
least_conn;
server $server1_ip;
server $server2_ip;
}
I wanna use http for start, should i do any settings at nginx/caunda?
In general, you can copy the entire Camunda installation directory to another server and have a reasonable expectation that it will work. I use WildFly, but Tomcat should behave in a similar manner. The only things you need to concern yourself with would be any configuration that is specific to a particular hostname. For example, if you are using HTTPS and pointing at a specific Java keystore, then the server certificate in the keystore must be correct for the server.
The datasource (database), which is really what ties a cluster together, should be the same for both.
The load balancer shouldn’t care what your Camunda configuration is as it generally is just routing to a host and port.
When using a load balancer, make sure to use sticky sessions. The Camunda web application’s do not share sessions across cluster nodes, so plain round-robin load balancing does not work.
When settin up a clustered configuration I like to allocate a given number of nodes as job executors and a different set of nodes wth job executor disabled to act as service nodes. Using this approach you can scale job executors and service nodes independently.
if you are using MSA architecture, you can do client side load balancing using netflix-ribbon dependencies which works on round-robin load balancing algorithm
So, I installed nginx at server1 where there is first part of camunda cluster. There is second camunda at server2.
Load balancing method was selected least_conn, added to default nginx conf:
upstream backend {
least_conn;
server $server1_ip;
server $server2_ip;
}
I wanna use http for start, should i do any settings at nginx/camunda?