How can I setting the rack ID in Ambari API？

[#1]

I have to build a large cluster, for which I’ll need to set rack ID many times. I know two methods in Ambari Web for setting the Rack ID. http://docs.hortonworks.com/HDPDocuments/Ambari-2.1.2.0/bk_Ambari_Users_Guide/content/ch03s11.html

So I want to know if I can write a script which sets the rack ID in Ambari API

Ambari: 2.1.2.1 Hadoop: HDP2.3.0

[#2]

@Kai Fukazawa

Please see this

With the latest Ambari UI code you should see an option to set the rack info for each host. You can also set the rack info property through the API ...

PUT api/v1/clusters/c1/hosts/[host_name]

{
  "Hosts" : {
    "rack_info" : "/rack-01"
  } 

}

Take from https://issues.apache.org/jira/browse/AMBARI-6646

[#3 · Accepted solution]

The hosts table in the database has a field called rack_info that supports up to 255 chars. It can be edited from the UI in the Host page for a single host.

In order to edit it using the API, you can make a single request to edit it for x number of hosts. E.g.,

curl -u $username:$password -X PUT -H 'X-Requested-By:admin' http://$server:8080/api/v1/clusters/$clustername/hosts -d '{"RequestInfo":{"context":"Set Rack","query":"Hosts/host_name.in($FQDN_1,$FQDN_2,$FQDN_3)"},"Body":{"Hosts":{"rack_info":"/my_new_rack_value"}}}'

Actual call,

curl -u admin:admin -X PUT -H 'X-Requested-By:admin' http://c6401.ambari.apache.org:8080/api/v1/clusters/c1/hosts -d '{"RequestInfo":{"context":"Set Rack","query":"Hosts/host_name.in(c6401.ambari.apache.org,c6402.ambari.apache.org,c6403.ambari.apache.org)"},"Body":{"Hosts":{"rack_info":"/my_new_rack_value"}}}'

[#4]

It worked! Thank you.