diff --git a/devops-service/lib/executors/server_executor.rb b/devops-service/lib/executors/server_executor.rb
index 671c472..b119567 100644
--- a/devops-service/lib/executors/server_executor.rb
+++ b/devops-service/lib/executors/server_executor.rb
@@ -132,6 +132,7 @@ module Devops
           retry
         end
 
+        provider = @server.provider_instance
         @server.chef_node_name = provider.create_default_chef_node_name(@server) if @server.chef_node_name.nil?
         r = @knife_instance.knife_bootstrap(@out, ip, self.bootstrap_options(ja, options))
         if r == 0