Using notifies with templates

default.rb

service "mysql" do
  supports :restart => true
  action :enable
end

if ['solo', 'db_master', 'db_slave'].include? node[:instance_role]
  template "/etc/mysql.d/custom.cnf" do
    owner 'root'
    group 'root'
    source 'custom.cnf.erb'
    notifies :restart, resources(:service => 'mysql')
  end

end