Keeping capistrano in check: ensuring roles are respected in sub-tasks

Keeping capistrano in check: ensuring roles are respected in sub-tasks

def with_role(role, &block)
 original, ENV['HOSTS'] = ENV['HOSTS'], find_servers(:roles =>role).map{|d| d.host}.join(",")
 begin
   yield
 ensure
   ENV['HOSTS'] = original
 end
end 

Capistranoで上位タスクと同じホストを強引に処理対象とする

Re: Identify current host

task :bootstrap, :roles => :master do
servers = find_servers_for_task(current_task)
servers.each do |server|
puts "host: #{server.host}"
end
end

Callbacks and roles

  task :my_custom_task, :roles => :role2 do
    servers = find_servers_for_task(current_task) & roles[:role2].servers
    run "whatever", :hosts => servers if servers.any?
  end

Capistrano で rsync

Capistranoであえて非並列にコマンド実行する

Capistrano