Hi,   api.get_all_hosts() returns just basic information about a host by default, a SUMMARY view. You probably want the FULL view. See docs here: https://cloudera.github.io/cm_api/epydoc/5.11.0/cm_api.api_client.ApiResource-class.html#get_all_hosts   If you do a simple HTTP GET on {CM_HOST:PORT}/api/v{version}/hosts you can easily see the kind of stuff returned by api.get_all_hosts(), and if you look at {CM_HOST:PORT}/api/v{version}/hosts?view=FULL you'll see you can get more details, like the role refs.   For your use-case of replacing a failed node, there's significant trickiness in getting the steps just right. You may want to look into Cloudera Director, which can repair worker or gateway nodes, among many other features. Here's the doc page for repairing a node: https://www.cloudera.com/documentation/director/latest/topics/director_ui_cluster_shrink.html   Thanks, Darren ... View more