Bootstrap another node with your chef-server. If you get the following error: Failed to read the private key /etc/chef/validation.pem: # In the same error logs you will see a line: Delete your validation key in order to use your user credentials instead Please check that you don't have any validation.pem key in /etc/chef, if any, then delete it. You can verify by executing one of the following: knife client list knife node show chef-node2 Create a new cookbook postgresql: chef generate cookbook cookbooks/postgresql Edit cookbooks/postgresql/recipes/default.rb [code] package 'postgresql-server' do notifies :run, 'execute[postgresql-init]' end execute 'postgresql-init' do command 'postgresql-setup initdb' action :nothing end service 'postgresql' do action [:enable, :start] end <span data-mce-type="bookmark" id="mce_SELREST_start" data-mce-style="overflow:h...