How does one run Spring XD in distributed mode?

Question

I'm looking to start Spring XD in distributed mode (more specifically deploying it with BOSH). How does the admin component communicate to the module container?

If it's via TCP/HTTP, surely I'll have to tell the admin component where all the containers are? If it's via Redis, I would've thought that I'll need to tell the containers where the Redis instance is?

Update

I've tried running xd-admin and Redis on one box, and xd-container on another with redis.properties updated to point to the admin box. The container starts without reporting any exceptions.

Running the example stream submission curl -d "time | log" http://{admin IP}:8080/streams/ticktock yields no output to either console, and not output to the logs.

Answer 1

Communication between the Admin and Container runtime components is via the messaging bus, which by default is Redis.

Make sure the environment variable XD_HOME is set as per the documentation; if it is not you will see a logging message that suggests the properties file has been loaded correctly when it has not:

13/06/24 09:20:35 INFO support.PropertySourcesPlaceholderConfigurer: Loading properties file from URL [file:../config/redis.properties]

Answer 2

If you are using the xd-container script, then the redis.properties is expected to be under "XD_HOME/config" where XD_HOME points the base directory where you have bin, config, lib & modules of xd.