Hi Mike,Thank you for your response. I have another related question:assuming this is the part of template for DELETE action: Type: OS::Heat::SoftwareDeployment Properties: actions: [ DELETE ] config: { get_file: scripts/drain_sessions.sh } input_values: {...} name: .... server: ... signal_transport: NO_SIGNAL When the config script is executed, is this correct:* No traffic will reach the server (The server is removed from loadbalancing) One thing more: who call the config script ? Thank you -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20150505/4f9dbb21/attachment.html>