[chef] Re: Prevent resource from triggering multiple times in a single run

[Lamont Granquist < >]

If its really a remote_file resource then those support etags and 
last-modified-since so it won't be expensive to run multiple times.

Generally when you have a call-many-times-run-only-once pattern you're 
looking at include_recipe'ing the expensive thing so it only gets 
created once in the resource collection.

You can also use a definition to edit the resource collection and the 
definition can check and exit if the resource always exists.

On 08/29/2015 01:42 PM, Mark Selby wrote:
> remote_file “/var/tmp/somefile” do
>     source “http://binfiles/somefile”
>     owner “root”
>     group “root”
>     mode “0644”
>     action :create
> end
>
> Lets just suppose that this is a somewhat expensive operation that may 
> need to get called multiple times during a converge depending on what 
> recipes the node is running. I would like to say “do not execute this 
> resource if it has already been triggered during this run”
>
> I would also not like to use a marker file if I can avoid it.
>
> I know we have delayed execution but that is not what I want. I need 
> this to trigger on the first call and then not again. Can I use the 
> run_status or run_context to accomplish this?
>
> Thanks!