在Chef only_if guard中使用多个条件

Question

I am using the following chef resource:

execute 'run_command' do
  command "chkconfig service on"
  only_if node['platform_version'].to_i == 6, 5
end

Please let me know if only_if guard is used in correct fashion

Answer 1

The ruby commands in the guard block should be enclosed in {}. Also note that any ruby code inside the guard block will be executed at the converging phase ie run-time. I had a similar scenario and based on tensibai's comment above, I just used a array with pre-included values to be checked for the ubuntu version.

execute "apt-get-update" do
  command "apt-get update"
  ignore_failure true
  notifies :install, 'package[ntp]', :immediately
  not_if {[16.04, 18.04].include?(node['platform_version'].to_f) && (node['packages'].keys.include? "ntp")}
  #not_if {(node['packages'].keys.include? "ntp")}
end

So for your scenario, I believe that the guard-block would be something like

execute 'run_command' do
    command "chkconfig service on"
    only_if {[5, 6].include?(node['platform_version'].to_i)} 
end