[jboss-as7-dev] Domain mode server launch command

When running AS7 in a domain, we need to be able to bind each host to explicit numa nodes when the process is launched. We need to be able to insert a numa command before the java command for each server process that is launched by the HostController. The numa command needs to be configurable for each host, i.e. we might want to bind hosts to different numa nodes or the same numa node. Another use case that I am aware of is running the server process under a different user account to the HostController, e.g. prefixing the java command with something like "sudo joe java" Having thought about our use case and a use case where the host should start start under a different account , a possible solution could be to modify the AS config schema to allow a generic "launch command" for each server entity, so that the host.xml would look something like; <server name="server-one" group="main-server-group" launchCommand="numactl --membind 0 --cpubind 0"/> <server name="server-two" group="main-server-group" auto-start="true" launchCommand="numactl --membind 1 --cpubind 1"> <!-- server-two avoids port conflicts by incrementing the ports in the default socket-group declared in the server-group --> <socket-bindings port-offset="150"/> </server> <server name="server-three" group="main-server-group" auto-start="true" launchCommand="sudo joe"> <!-- server-two avoids port conflicts by incrementing the ports in the default socket-group declared in the server-group --> <socket-bindings port-offset="150"/> </server> If a launchCommand attribute was defined for a server, you could parse the attribute value and add the parsed commands to the ProcessBuilder before the java command. The main difficulty would be validating any commands added in launchCommand attribute, not sure how problematic this would be? Regards, John -- John O'Hara johara(a)redhat.com JBoss, by Red Hat Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in UK and Wales under Company Registration No. 3798903 Directors: Michael Cunningham (USA), Charlie Peters (USA), Matt Parsons (USA) and Brendan Lane (Ireland).