[Capistrano] Re: Is there a prettier way to deploy to groups within a role

[Jamis Buck]

Alas, that will almost, but not quite work. The reason it won't is that the :only bit on the deploy_war_group task is evaluated when the file is loaded, which is before group1, group2, or group3 get called. :(

- Jamis

On Aug 26, 2008, at 3:47 PM, Owen wrote:

The reason the file loads at all is that $global is nil until initialized, so the task will only run for :biz servers for which :group is nil.

You've inspired me Jamis. How about the following...

task :group1 do
 $group = 1
end

task :group2 do
 $group = 2
end

task :group3 do
 $group = 3
end

# Note, I have to use a global variable because the tasks can't see
local scope
task :deploy_war_group, :roles => :biz, :only => { :group => $group }
do
 ...
end

task :deploy_war, :roles => :biz do

end

# then i can control what group through command line
cap prod group1 deploy_war_group
cap prod group2 deploy_war_group
cap prod group3 deploy_war_group
cap prod deploy_war

I can then reuse these groupings for my view tier and cache servers,
etc.

Thanks,
Owen


On Aug 26, 1:01 pm, Jamis Buck <[EMAIL PROTECTED]> wrote:

That approach certainly works. In fact, I think it's the simplest
approach. There are others (involving programmatically identifying
which servers are active in a group, and then restricting subsequent
run() calls to those servers), but I'd recommend what you have. If
you're worried about duplicating code inside each subtask, you can
just define a function and call the function from each:

   def deploy_war_guts
     run(...)
     run(...)
     ...
   end

   1.upto(3) do |group|
     task("deploy_war_group#{group}", :roles => :biz, :only =>
{ :group => group }) do
       deploy_war_guts
     end
   end

- Jamis

On Aug 26, 2008, at 12:52 PM, Owen wrote:

We've been using capistrano to manage our Java deployments using
tomcat and BigIP to control load balancing.

We need to deploy to groups within a role to avoid taking the whole

particular role. Is there a better way than the following to achieve
the desired effect?

site out, but want to maintain the the complete list of servers for a

role :biz, "biz1", "biz2", :group => 1
role :biz, "biz3", "biz4", :group => 2
role :biz, "biz5", "biz6", :group => 3

task :deploy_war_group1, :roles => :biz, :only => { :group => 1 } do
  ...
end

task :deploy_war_group2, :roles => :biz, :only => { :group => 2 } do
 ...
end

task :deploy_war_group3, :roles => :biz, :only => { :group => 3 } do
 ...
end

task :deploy_war, :roles => :biz do
  deploy_war_group1
  deploy_war_group2
  deploy_war_group2
end

Thanks.

 smime.p7s
3KViewDownload

--~--~---------~--~----~------------~-------~--~----~
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at http://groups.google.com/group/capistrano
-~----------~----~----~----~------~----~------~--~---

smime.p7s
Description: S/MIME cryptographic signature