[chef] Re: how can i set node attribute from inside powershell_script resource

["Steven Murawski" < >]

You can't update an attribute from inside a powershell_script that is executing.  You could do something like the below (with one example where the PowerShell script evaluates to $true and one where it evals to $false:

node.default['test'] = false

ruby_block 'Terminate Chef Client Run' do

  action :nothing

  block do 

    Chef::Application.fatal! 'The attribute was true!'

  end

  only_if {node['test'] == true}

end

ruby_block 'Fail PowerShell Test' do

  block do 

    node.default['test'] = true

  end

  guard_interpreter :powershell_script

  only_if "test-path c:/windows2"

  notifies :run, 'ruby_block[Terminate Chef Client Run]', :immediately

end

ruby_block 'Pass PowerShell Test' do

  block do 

    node.default['test'] = true

  end

  guard_interpreter :powershell_script

  only_if "test-path c:/windows"

  notifies :run, 'ruby_block[Terminate Chef Client Run]', :immediately

end

Steven Murawski

Community Software Development Engineer @ Chef

Microsoft MVP - PowerShell
http://stevenmurawski.com

On 7/10/2015 9:07:23 AM, Pradeep Kumar < > wrote:

Hi All,

i have a boolean attribute. i want to set the attribute to true conditionally inside a powershell_script.

if the attribute is true i would like to throw a fatal error message and abort chef run.

i'm stuck on how to set the attribute value from inside the powershell.

in the below case #{node.default['saas_wfa_prod_db_server']['fail_chef']=true} is running irrespective of the if condition. (may be its evaluated during compile) 

below is the code. can some one please help.

--code--

node.default['saas_wfa_prod_db_server']['fail_chef'] = false

powershell_script "get available offline disks" do

code <<-EOH

$sysstoragelength =4

$drivestoragelength=5

if($sysstoragelength -lt $drivestoragelength)

{

#{node.default['saas_wfa_prod_db_server']['fail_chef']=true}

}

EOH

end

if (node['saas_wfa_prod_db_server']['fail_chef']) 

Chef::Application.fatal!("sufficient number of disks not available in offline state", 42) 

end

--

pradeep