[chef] Re: Re: chef + managed-directory pain

[" " < >]

Hi,

maybe my explanation wasn't clear enough.


The goal is to have only files managed by chef in a directory ( imagine /etc/apache2/conf.d/ or /etc/apt/sources.list.d/).

On most systems you don't know what's in these directories (for example bringing existing/legacy systems under chef control)


Example:

#delete unmanged files in directory "/etc/apache2/conf.d" ("empty" is an empty-directory (only with a .placeholder file because chef fails if the
source-directory is empty). With this approach you can clean out a directory:

remote_directory "/etc/apache2/conf.d" do
  source "empty"
  mode "0755"
  files_backup 0
  recursive true
  purge true
end


#generate (config)-file
file "/etc/apache2/conf.d/charset.conf" do
  content "some content\n"
end


The problem with this approach is that now on every chef run the file gets recreated and for a short period of time the file is unavailable (and for example if you use notifications on the file resource these are triggered now on every chef run even when the file content hasn't changed)


In puppet this works and I've used this a lot to realize managed directory's.


https://github.com/zts/chef-cookbook-managed_directory tries to solve the problem, but unfortunately has the same issues.


I think managed directory's are best-practice because you only have full-control what's in the directory with managed directories. 


Thanks for help,

Bjoern

2012/8/22 AJ Christensen < " target="_blank"> >

Hello,

I has an idea:

On 23 August 2012 03:06, "> < "> > wrote:
> Hi,
>
> has anybody a solution how to realize managed directories with chef ?
>
>
> remote_directory with "purge true" isn't a solution in the following cases:
>
>
> Ubuntu:
>
>
> Case 1:
>
> 1.  clean out /etc/apt/sources.list.d/
>
> 2.  create apt-repo-files with "apt_repository" in /etc/apt/sources.list.d/
>
> 3.  remote_directory-resource deletes the files from 2.

Don't mix resources (and providers) to manage the same content.

Dynamically consume data pertaining to your infrastructure and create
the Resources required via the Recipe DSL:

node['apt_repositories']['enabled_repositories'].each do |repo|
  apt_repository repo['name'] do
    ...
  end
end

A similar (contrived) example could be made for the other scenario you
posted below.

Generally, I'd (personally) say jamming files in a cookbook and
remote_directory transferring them around is an anti-pattern that
should be avoided (YMMV)

--AJ

>
>
>
> Case 2:
>
> 1. clean out /etc/apache2/conf.d/
>
> 2. generate apache config-files (with template resource) in
> /etc/apache2/conf.d/
>
> 3. remote_directory-resource deletes the files from 2.
>
>
>
> I've looked at  https://github.com/zts/chef-cookbook-managed_directory ,but
> ths solution has the same problems.
>
>
> Thats the last big hurdle on our migration to chef,  I hope somebody have an
> idea.
>
>