THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
We are performing a multi-node install and the blueprint above has two host groups. Therefore, for our cluster instance, we define one host in masters, two hosts in slaves and reference the multi-node-hdfs-yarn blueprint.
| Info |
|---|
The below multi-nodeexample cluster creation template example uses the "host_count" and "host_predicate" syntax for the "slave" host group which is available as of Ambari 2.1.0. For older versions of Ambari, the "hosts/fqdn" syntax must be used. |
...
| Code Block |
|---|
POST /api/v1/clusters/MyThreeNodeCluster
...
[ Request Body is above Cluster Creation Template ]
...
202 - Accepted
{
"href" : "http://c6401.ambari.apache.org:8080/api/v1/clusters/MyThreeNodeCluster/requests/1",
"Requests" : {
"id" : 1,
"status" : "InProgress"
}
} |
Adding Hosts to an Existing Cluster
After creating a cluster using the Ambari Blueprint API, you may scale up the cluster using the API.
There are two forms of the API, one for adding a single host and another for adding multiple hosts.
| Info |
|---|
The blueprint add hosts API is available as of Ambari 2.0. Currently, only clusters originally provisioned via the blueprint API may be scaled using this API. |
Example Add Host Template
Single Host Example
Host is specified in URL
| Code Block |
|---|
{
"blueprint" : "multi-node-hdfs-yarn",
"host_group" : "slaves"
} |
Multiple Host Form
Host is specified in request body
| Code Block |
|---|
[
{
"blueprint" : "multi-node-hdfs-yarn",
"host_group" : "slaves",
"host_name" : "c6403.ambari.apache.org"
},
{
"blueprint" : "multi-node-hdfs-yarn",
"host_group" : "slaves",
"host_name" : "c6404.ambari.apache.org"
}
] |
Multiple Host Form using host_count
Starting with Ambari 2.1, the fields "host_count" and "host_predicate" can also be used when adding a host.
These fields behave exactly the same as they do when specified in the cluster creation template.
| Code Block |
|---|
[
{
"blueprint" : "multi-node-hdfs-yarn",
"host_group" : "slaves",
"host_count" : 5,
"host_predicate" : "Hosts/os_type=centos6&Hosts/cpu_count=2"
}
] |
Add Host Request
Single Host
| Code Block |
|---|
POST /api/v1/clusters/myExistingCluster/hosts/c6403.ambari.apache.org
...
[ Request Body is above Single Host Add Host Template ]
...
202 - Accepted
{
"href" : "http://c6401.ambari.apache.org:8080/api/v1/clusters/myExistingCluster/requests/1",
"Requests" : {
"id" : 1,
"status" : "Pending"
}
} |
Multiple Hosts
| Code Block |
|---|
POST /api/v1/clusters/myExistingCluster/hosts
...
[ Request Body is above Multiple Host Add Host Template ]
...
202 - Accepted
{
"href" : "http://c6401.ambari.apache.org:8080/api/v1/clusters/myExistingCluster/requests/1",
"Requests" : {
"id" : 1,
"status" : "Pending"
}
} |
Blueprint Support for High Availability Clusters
...