[chef] Re: compile vs execution phase

[Lamont Granquist < >]

I think this is worse than you think it is, because all attributes files 
are parsed before any recipes are evaluated, so your trouble here is 
going beyond compile-converge mode issues.

You may want to move both your attribute-default-setting code and your 
directory construction into an LWRP.  That will result in your 
attributes only being set correctly in converge mode after the LWRP has 
run, however.   If you have more code that expects to be able to consume 
the node[:cassandra][:data_dirs] attribute in compile mode, then you'll 
probably need to modify or wrap your cassandra cookbook to do its work 
at compile time and then update the attributes after its done its work.

On 1/3/14 10:46 PM, Bill Warner wrote:
> I've been working on learning how to write cookbooks using chef-solo.  
> I have created two cookbooks, one that evaluates the physical array 
> controllers and configures, partitions, luks_encrypts, mkfs and mounts 
> the drives to /data/1, /data/2, /data/3, etc...  This works really 
> well on a new machine and puts the hardware in a state we are looking 
> for no matter how many drives there are or what their sizes are.
>
> I also have a simple cassandra cookbook that installs an fpm version 
> of cassandra, runs a template of the cassandra.yaml and creates the 
> data directories depending on what drives are mounted to /data/1 
> /data/2 /data/3 etc...
> done similar to:
>
> #attributes file
> default[:datadirs] = []
> Dir.foreach("/data") do |drives|
>   next if drives.match(/^\.\.?$)
>   if system "/bin/mountpoint /data/#{drives}>/dev/null" then
>     default[:cassandra][:data_dirs].push( 
> "/data/#{drives}/cassandra/data" )
>   end
> end
>
> #recipe
> node[:cassandra][:data_dirs].each do |data_dir|
>   directory "#{data_dir}" do
>     owner "cassandra"
>     group "cassandra"
>     mode 0750
>     action :create
>     recursive true
>   end
> end
>
>
> Of course this is getting generated at compile time when nothing is in 
> /data.  The disks cookbook runs and populates /data/# however, the 
> cassandra cookbook wont work unless there is a way to regen the recipe 
> after the disk cookbook has completed.  running chef-solo a second 
> time gets things into a proper state.
>
> Is there a better way to create the directories?  I think I can use 
> the lazy attribute assignment to make my template work, but the 
> directory creation is giving me hell.
>
> Thanks for any help
> --
> Bill Warner