Hello,
sorry it took me so long to reply.
Thank you for the answer. That has helped me a lot and I think I'm on
the correct path now. It is just a lot more verbose than I had hoped
:)
> A custom function that expands the array would be a bit more
> universal, but you can still do this with puppet define resource type
> with no ruby code:
>
> define hadoop::mount {
> file { "/mnt/${name}/hadoop":
> ensure => directory,
> owner => "root",
> group => "hadoop",
> require => Package["hadoop-0.20"]
> ;
> }
> }
>
> hadoop::mount {
> ["disk1", "disk2", "disk3"]:
> }
This in combination with virtual resources seems to work[1]. It is
pretty complicated and unintuitive though as I can't require + realize
a virtual resource at the same time[2] so I have to add placebo
definitions that realize the resources so I can require them and
subscribe to them. I'm still in the process of converting everything
to virtual resources so it doesn't work at the moment but I'll see
tomorrow if I can get it working. Can slim it down afterwards if I
find better ways to do stuff.
> The difference between the system can be written as a custom fact, a
> variable set at top scope when defining the nodes, or use parametrized
> class (available in 2.6).
>
> class demo ($disk) {
> case $disk {
> "2" : { # add resource specific for 2 disk }
> "6" : { # add resource specific for 6 disk }
> }
> # common for all system using class demo
> }
>
> node server1 {
> class { "demo": disk => 2 }
> }
>
> node server2 {
> class { "demo": disk => 6 }
> }
That looks interesting. I've read about those new parameterized
classes but skipped them for now. Thanks for the hint. I'll take a
look at it later when I got the basics working again.
Cheers,
Lars
[1]
https://github.com/lfrancke/gbif-puppet/blob/master/modules/hadoop/manifests/init.pp#L22-66
[2]
https://github.com/lfrancke/gbif-puppet/blob/master/modules/hadoop/manifests/namenode.pp#L19-24
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