deploy.rb

# deploy.rb
server '0.0.0.0', roles: %w{ retire }           # Old app server is given a role of 'retire'
server '0.0.0.1', roles: %w{ app db }       # New app server gets the existing roles
set :whenever_roles, %w{ retire app }

schedule.rb

# schedule.rb
every 1.hour, roles: [:app] do
    # Do some work in here
end