[chef] Re: Case statement with wildcards?

[Joshua Timberman < >]

Hello!

On Mon, Jul 4, 2011 at 8:18 AM, ItsMikeE 
<
 >
 wrote:
> I was intending to set up some Chef environments for different parts of the
> network but noticed that the information is already present within the FQDN.
>
> Taking the simple example of
>  node1.primary.mycompany.com
>  node2.secondary.mycompany.com
>  node3.dmz.mycompany.com
>
> how can I write a case statement to process differently according to whether
> node is in primary, secondary or dmz?

I would create an ohai plugin to get the subdomain part. Something like this:

    provides "subdomain"
    require_plugin "#{os}::hostname"

    parts = fqdn.split(/\./)

    subdomain parts[1]

You can distribute this to your nodes with Opscode's "ohai" cookbook[0].

    % knife cookbook site install ohai
    % $EDITOR cookbooks/ohai/files/default/plugins/subdomain.rb
    # paste the code above
    % knife cookbook upload ohai

Then add 'recipe[ohai]' to your nodes, and when chef runs, they'll
have an attribute "subdomain".

    % knife node show virt1test -a fqdn
    fqdn:  virt1test.int.example.com
    % knife node show virt1test -a subdomain
    subdomain: int


[0]: http://wiki.opscode.com/display/chef/Distributing+Ohai+Plugins

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Joshua Timberman, Director of Training and Services
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