Thank you Jamis!
Please forgive my ignorance, but how can I know what other options
like :max_hosts are available? And is there a way to configure the
time that max_hosts waits? I have not had any luck finding it in the
source yet.
Thanks again!
On Jun 9, 9:16 pm, Jamis Buck <[EMAIL PROTECTED]> wrote:
> Actually, capistrano has that functionality baked in, via the :max_hosts
> option. You could define your role with a block, so it gets evaluated
> late (from a temp file, for example), and then just set the :max_hosts
> option on the task in question. E.g.:
>
> role :dynamic_servers do
> IO.readlines(server_list).map { |line| line.chomp }
> end
>
> desc "Test cycling through servers"
> task :test_each, :roles => :dynamic_servers, :max_hosts => 5 do
> run "uptime"
> end
>
> Then, when capistrano is asked to execute the "uptime" command on all
> servers in the dynamic_servers role, it will first evaluate the block
> for the dynamic_servers role, and will then see that it is only to use 5
> hosts at a time.
>
> - Jamis
>
> JasonSmithy wrote:
> > Hi,
>
> > Is there anyway to reset a role?
>
> > What I want to do is read a list of IPs dynamically from a temporary
> > file, then run a task on a portion of the list at a time, not have the
> > task run on all the IP's directly in parallel. What I am trying to do
> > so far is to get the list, run the task on the first IP in the list,
> > sleep for 5 seconds and then run the task again on the next IP in the
> > list. Ideally, this would take 5 IPs at a time until all IPs are
> > executed, but I need to learn to crawl before I can walk ;)
>
> > task :test_cycle do
> > transaction do
> > set :j, 4
> > set :k, 0
> > $servers = IO.readlines(server_list) # Get the list of
> > servers from
> > temp file.
> > while k < j
> > # This is a method to increment by one.
> > Capistrano
> > # complains that "+" is an unknown method
> > without this.
> > def add(value)
> > value = value + 1
> > return value
> > end
>
> > $ip = $servers[k].chomp
>
> > role :servers_each, $ip # Set the
> > server_each role to the new IP
>
> > test_each # Run the task
> > set :k, add(k) # Increment k by 1.
> > role :servers_each, servers_each.clear
> > end
> > end
> > end
>
> > desc "Test cycling through servers"
> > task :test_each, :roles => :servers_each do
> > run "uptime"
> > puts "Sleeping for 5 seconds"
> > sleep 5
> > end
>
> > This works except for each time the loop is run, the next IP gets
> > added to the server_each role. This has the effect of re-running the
> > command on each server each time. So the first time it runs from 1
> > server. The next time, it runs on 2 servers, and so on.
>
> > How can I set server_each back to empty after running test_each and is
> > this even the a good way to do this?
>
> > Thanks in advance for you help!
--~--~---------~--~----~------------~-------~--~----~
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at http://groups.google.com/group/capistrano
-~----------~----~----~----~------~----~------~--~---
