And, _actually_, there's an even better way to do it. (Why do I
always think of these things after opening my mouth?)
The problem with the solution I gave you is that the restarts will
happen serially, instead of in parallel. First, the solaris servers
will restart, and then the others.
A cleaner way to do it is to package your custom restart code in a
script that detects the OS on which it is executing and "does the
right thing." Then, your restart task just needs to call that script,
and all servers will execute it, choosing the branch that works for
them, and the restarts occur in parallel again:
task :restart, :roles => :app do
run "#{current_path}/script/restart"
end
I'd give the script/restart script here, too, but my shell-fu is
limited enough that I can't do it off the top of my head. I'll leave
it as an exercise for the reader. :)
- Jamis
On Apr 4, 2007, at 12:10 PM, maui wrote:
>
> Very cool!
>
> Thank You Jamis
>
> On Apr 4, 12:51 pm, Jamis Buck <[EMAIL PROTECTED]> wrote:
>> On Apr 4, 2007, at 9:03 AM, maui wrote:
>>
>>
>>
>>> Hi everyone,
>>
>>> Over here we're using multiple OSs for our rails app. Our dev
>>> env is
>>> on a FreeBSD box and we're using TextDrive Accelerators for
>>> deployment
>>> (OpenSolaris). As a result we need to customize a few of our tasks
>>> based on the server type. One idea we had was to use extra
>>> information to indicate which servers are running OpenSolaris. For
>>> example s1.foo.com is running FreeBSD and s1.foo.com is running
>>> Solaris.
>>
>>> role :app, "s1.foo.com"
>>> role :app, "s2.foo.com", :solaris => true
>>
>>> So, the question is can a task see which server it is being executed
>>> on? For instance:
>>
>>> task :restart do
>>> if <extra information for this server hash>[:solaris]
>>> run 'svcadm restart /network/mongrel'
>>> else
>>> mongrel_rails cluster::restart
>>> end
>>> end
>>
>>> Does the magic code in angle brackets above exist?
>>
>> Mark, no, because the task is not executed once for each server, but
>> once for all matching servers. The "right" way to do that would be to
>> put the different parts in different tasks, and put the condition on
>> the task:
>>
>> task :restart do
>> restart_solaris
>> restart_other
>> end
>>
>> task :restart_solaris, :only => { :solaris => true } do
>> run 'svcadm restart /network/mongrel'
>> end
>>
>> task :restart_other, :except => { :solaris => true } do
>> run "mongrel_rails cluster::restart"
>> end
>>
>> Hope that helps,
>>
>> Jamis
>
>
> >
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