I have a system in production that has several servers in several roles. I would like to test a new app server by deploying to that specific server, without having to redeploy to every server in production. Is there a way to ask Capistrano to deploy to a specific server? Ideally I'd like to be able to run something like

cap SERVER=app2.example.com ROLE=app production deploy

if I just wanted to deploy to app2.example.com.

Thanks!

[update] I tried the solution suggested by wulong by executing:

cap HOSTS=app2.server.hostname ROLE=app qa deploy

but capistrano seemed be trying to execute tasks for other roles on that server in addition to app tasks. Maybe I need to update my version of cap (I'm running v2.2.0)?

deployment capistrano release-management
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