@Dim Guy please take a look at documentation here. Removing a Host (2.1.0) Verified against releases 2.1.0 The preferred way to remove a host is to move the master services from the host, decommission the slave nodes and then remove the host afterdeleting all the host components. However, there are situations such as the host is lost and cannot be brought back online for graceful removal. Under this circumstances the following API calls can be used to clean up the host. 1. Get a list of host components mapped to the host curl -u admin:admin -H "X-Requested-By: ambari" -X GET http: //AMBARI_SERVER_HOST:8080/api/v1/clusters/c1/hosts/HOSTNAME
See the property, "host_components" for all the host. Sample: 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"
}
}]
...
2. DELETE all host components mapped to this host E.g. Delete DATANODE
curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http: //AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME/host_components/DATANODE
3. DELETE the host curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http: //AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME
... View more
