Hello!
Sorry to bother you during holidays, but is looks like Duffy has a trouble provisioning CentOS 7 nodes:
``` 2019-12-26 07:36:18,171 [agent-control/allocate_node] INFO: Attempting to allocate a node (7 x86_64) ... 2019-12-26 07:52:19,680 [agent-control/allocate_node] INFO: Waiting 1800 seconds before another retry 2019-12-26 08:22:19,757 [agent-control/_execute_api_command] INFO: Duffy request URL: xxx 2019-12-26 08:22:19,759 [connectionpool/_new_conn] INFO: Starting new HTTP connection (1): xxx 2019-12-26 08:22:20,029 [agent-control/allocate_node] ERROR: Received unexpected response from the server: Insufficient Nodes in READY State 2019-12-26 08:22:20,029 [agent-control/allocate_node] INFO: Waiting 3600 seconds before another retry 2019-12-26 09:22:20,126 [agent-control/allocate_node] ERROR: Failed to allocated a node 2019-12-26 09:22:20,126 [agent-control/<module>] CRITICAL: Can't continue without a valid node ```