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See the property, "host_components"  for all the host.

Sample:

Code Block
 Output:
...
"host_components" : [
    {
      "href" : "http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME/host_components/DATANODE",
      "HostRoles" : {
        "cluster_name" : "CLUSTERNAME",
        "component_name" : "DATANODE",
        "host_name" : "HOSTNAME"
      }
    },
    {
      "href" : "http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME/host_components/GANGLIA_MONITOR",
      "HostRoles" : {
        "cluster_name" : "CLUSTERNAME",
        "component_name" : "GANGLIA_MONITOR",
        "host_name" : "HOSTNAME"
      }
    }]

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2. DELETE all host components mapped to this host

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