CODEWITHSUNDEEP
rubyregexchef-infrachef-recipe
eramm
eramm

Reputation: 241

Chef - Query a YUM Repo beforepkg install

I would like to query he YUM repo before I call the install block to make sure the pkg is available

I am using the following code at the beginning of my recipee 

ruby_block 'shellout' do
  block do
    cmd = Mixlib::ShellOut.new('yum search httpd | grep -w httpd.x86_64 |tr -d "\n\r"'
    cmd.run_command
    Chef::Log.warn("printing #{cmd.stdout}")
    if cmd.stdout =~ /httpd/i
      Chef::Log.warn("pkg found in yum  #{cmd.stdout}")
    elsif cmd.stdout =~ /error/i
      Chef::Log.warn("yum returned an error #{cmd.stdout}")
    else
      Chef::Log.warn("pkg not in repo ? yum search returns #{cmd.stdout}")
    end
  end
end

however despite the fact that the pkg is in the repo the code does not work.

1) What am I doing wrong ?

2) Is there an easier way to do this ?

3) If the answer is "because your code is not running at run time how do I force it to run at Cf's run time ?

thanks

Upvotes: 0

Views: 102

Answers (1)

coderanger
coderanger

Reputation: 54249

This is not really how Chef works. You don't react to system state, you declared what it should be and then Chef enforces that. Way down in the depths it does the test-and-repair loop but high level, if the package should be installed then use a package resource. If you need to set up a specific repo first, we have the yum_repository resource. If this should be configurable per-host (or per-role, which is better) maybe use a node attribute to make the whole section conditional.

Upvotes: 1

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