gistfile1.txt

~/ruby/chef/chef$ cat /etc/chef/solo.json 
{
        "radiant": {
                "migrate": true,
                "migrate_command": "rake db:migrate",
                "revision": "HEAD",
                "action": "rollback",
                "environment": "production"
        },
        "recipes": ["radiant"]
}
#######################################################################

~/ruby/chef/chef$ sudo chef-solo -j /etc/chef/solo.json 
[Mon, 07 Sep 2009 06:05:56 -0600] INFO: Starting Chef Solo Run
[Mon, 07 Sep 2009 06:05:57 -0600] INFO: Setting RAILS_ENV, RACK_ENV, and MERB_ENV to `production'
[Mon, 07 Sep 2009 06:05:57 -0600] WARN: [DEPRECATED] please modify your deploy recipe or attributes to set the environment using a hash
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: rolling back to previous release: /srv/radiant/releases/20090907115535
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: Symlinking
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: Purging checked out copies of /log /tmp/pids and /public/system from current release
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: Linking shared /log /tmp/pids and /public/system into current release
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: Linking shared db config: /srv/radiant/shared/config/database.yml to release db config: /srv/radiant/releases/20090907115535/config/database.yml
[Mon, 07 Sep 2009 06:06:00 -0600] INFO: ensuring proper ownership
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: Linking release /srv/radiant/releases/20090907115535 into production at /srv/radiant/current
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: ensuring proper ownership
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: removing last release: /srv/radiant/releases/20090907120341
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: restarting with previous release
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: Restarting app with touch tmp/restart.txt in /srv/radiant/current
[Mon, 07 Sep 2009 06:06:01 -0600] INFO: Chef Run complete in 5.869913 seconds

#################################################

~/ruby/chef/chef$ ls -ahlp /srv/radiant/current
lrwxrwxrwx 1 railsdev root 36 2009-09-07 06:06 /srv/radiant/current -> /srv/radiant/releases/20090907115535/