On 13.12.2009 23:12, Douglas Garstang wrote:
> Ohad,
>
> No, not really because for starters there are anywhere from 1 to 10
> instances of jboss running, but not always 10. It depends on the node.
> If it was always 10, I could say something like
> before=>Service["jboss-inst0"], before=>Service["jboss-inst1"] etc.
>
> PLUS the jboss service is controlled inside a definition, not a class.
> I don't know if I can use before => in that case.
What you want to do is introduce a well-known, if artificial,
"synchronization" resource. In the simplest case this can be a stupid
stamp file:
| package { jboss: ... }
|
| application {
| app1: ..
| require => Package[jboss],
| before => File[/tmp/stamp];
| app2: ..
| require => Package[jboss],
| before => File[/tmp/stamp];
| app3: ..
| require => Package[jboss],
| before => File[/tmp/stamp];
| }
|
| file {
| "/tmp/stamp":
| }
|
| service {
| jboss1:
| require => File[/tmp/stamp];
| jboss2:
| require => File[/tmp/stamp];
| jboss3:
| require => File[/tmp/stamp];
| }
You can put the stamp file in a class that you include everywhere you
need to reference it. That way you can avoid all corner cases (like zero
applications). The other resources can be placed into classes or defines
without prejudice.
The only thing I'm not sure about, is whether notifications
(notify/subscribe) would propagate through the stamp file. If you need
this, I'd start experimenting with using an Exec with refreshonly instead.
Regards, DavidS
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