Impossible to run Rancher HA

I’m trying to run Rancher in HA mode with 3 nodes and an external database.
I’m able to log into URL:18080 to see management stack.
My “rancher-compose-executor” and “go-machine-service” cannot be up. One of the two containers is able to start, and the second failed with this logs :

time="2016-09-20T15:49:10Z" level=info msg="Listening on" 
time="2016-09-20T15:49:10Z" level=info msg="Forwarding setup to: :80" 
time="2016-09-20T15:49:11Z" level=info msg="Listening on port: 80" 
time="2016-09-20T15:49:11Z" level=info msg="Setting log level" logLevel=info 
time="2016-09-20T15:49:11Z" level=info msg="Starting go-machine-service..." gitcommit=v0.31.7 
time="2016-09-20T15:49:11Z" level=info msg="Waiting for handler registration (1/2)" 
time="2016-09-20T15:49:11Z" level=fatal msg="Exiting go-machine-service: Get https://my-server/v1: read tcp> read: connection reset by peer" 
time="2016-09-20T15:49:11Z" level=fatal msg="exit status 1" 

I also noticed that the Loadbalancer stay in “Initializing” status.