Re: not aborting on command failure - batching hosts

On 20 Dec, 19:50, Jamis Buck <ja...-uHoyYlH2B+GakBO8gow8eQ@xxxxxxxxxxxxxxxx> 
wrote:
> Yes, you can do:
>
> task :foo, :roles => %w(whatever), :on_error => :continue do
>    run "something that might fail"
> end
>
> The :on_error => :continue bit tells capistrano to continue on to the  
> next task, even if the command fails for any of the servers.
>
> As for running commands on N hosts at a time, that's what Capistrano  
> is all about. Just describe the hosts in roles, and then specify those  
> roles in the :roles parameter when defining the task. Or, you can use  
> the :hosts parameter and just give it an array of servers directly.
>
> - Jamis

jamis,

Thanks! I wasn't totally clear about the second question. Say I have
400 hosts, and I only want to run something on 5 at a time, instead of
all of them. Can I restrict to operating in batches? A good use case
example is a set of web servers that have dependencies on each others
deploys and need to having 'rolling' deploys. While I know this could
be done by placing them in different roles, it wouldd be tedious to do
it with all 400 if all I really want is to batch the execution.

Josh