Prerequisites

You must first authenticate and obtain the cookies to send a request.

Authenticate and obtain cookie
- Log in to Cloudera Manager and get the cookie to send a request. This generates a session cookie that must be provided with every request. If you are using an HTTP client such as Postman, you can copy the cookie value from your browser and add it as a header to your requests. You can also authenticate and obtain the cookie using the command line using cURL, as follows:
```
curl -i -k -v -c cookies.txt -u admin:admin
http://<cm_host>:7180/api/v41/clusters
```
- This command saves the resulting cookie in cookies.txt. You can use the cookie to make the requests. Run the following command to make the initial validation request.
```
curl -v -k -b cookies.txt -u <username>:<password> -H 'Content-Type: application/json' -X POST -H 'referer:
http://<cm_host>:7180/cmf/clusters/Cluster%201/queue-manager/'
http://<cm_host>:7180/cmf/clusters/Cluster%201/queue-manager-api/api/v1/environments/dev/clusters/Cluster%201/resources/scheduler/partitions/default/queues/root.default -d '<request_body>'
```

Secure cluster (SSL and Kerberos enabled)

If you are using a cluster secured with SSL and Kerberos, obtain the required certificates.

Create a directory on your machine to copy the certificates from the Queue Manager node. The following command creates the apiCerts directory.
```
mkdir apiCerts
```
SSH to your Queue Manager node to obtain the WebApp folder information.
```
cd /var/run/cloudera-scm-agent/process/
```

Copy the certificates from the Queue Manager node to the “apiCerts” directory.

scp -i <your_keypair>
root@<qm_host>:/var/run/cloudera-scm-agent/process/{12}-queuemanager-QUEUEMANAGER_WEBAPP/cm-auto-host_cert_chain.pem apiCerts/

Copy the following certificates from the Queue Manager node.

scp -i <your_keypair> 
root@<qm_host>:/var/run/cloudera-scm-agent/process/12-queuemanager-QUEUEMANAGER_WEBAPP/cm-auto-global_cacerts.pem apiCerts/

scp -i <your_keypair> 
root@<qm_host>:/var/run/cloudera-scm-agent/process/12-queuemanager-QUEUEMANAGER_WEBAPP/cm-auto-host_cert_chain.pem apiCerts/

scp -i <your_keypair> 
root@<qm_host>:/var/run/cloudera-scm-agent/process/12-queuemanager-QUEUEMANAGER_WEBAPP/cm-auto-host_key.pem apiCerts/

scp -i <your_keypair> 
root@<qm_host>:/var/run/cloudera-scm-agent/process/12-queuemanager-QUEUEMANAGER_WEBAPP/cm-auto-host_key.pw apiCerts/

Decrypt the certificate so that you can use it later in the cURL call.

openssl rsa -passin file:cm-auto-host_key.pw -in cm-auto-host_key.pem -out
cm-auto-host_key_decrypted.pem
chmod 644 cm-auto-host_key_decrypted.pem

Save the cookie for the API calls.

curl --key cm-auto-host_key_decrypted.pem --cert cm-auto-host_cert_chain.pem --cacert cm-auto-global_cacerts.pem -v -c cookies_ssl.txt -u admin:admin https://<cm_host>:7183/api/v41/clusters

Make the initial validation request.

curl --key cm-auto-host_key_decrypted.pem --cert cm-auto-host_cert_chain.pem --cacert cm-auto-global_cacerts.pem -v -b cookies_ssl.txt -u admin:admin -H 'Content-Type: application/json' -X POST -H 'referer: https://<cm_host>:7183/cmf/clusters/Cluster%201/queue-manager/' https://<cm_host>:7183/cmf/clusters/Cluster%201/queue-manager-api/api/v1/environments/dev/clusters/Cluster%201/resources/scheduler/partitions/default/queues/root.default\?validate=true\&startsafemode=60 -d '<request_body>

Initialization

Before using Queue Manager, you must initialize the back-end with information about the cluster. This is usually done using a POST request from the UI with information obtained from the Cloudera Manager, which you can find in various places in the Cloudera Manager UI.

The information can also be found in session storage after navigating to the Queue Manager UI. Refer your browser documentation for information about viewing session storage. For example, to view session storage in Chrome, see View Session Storage.

POST http://<cm_host>:7180/cmf/clusters/Cluster%201/queue-manager-api/api/v1/environments/dev/clusters

{
  "provisioner": "CLOUDERA_MANAGER",
  "provisionerUrl": "<cm_host>:<port (7180 or if secure cluster, 7183)>",
  "clusters": [
    {
      "rmUrl": <resource manager URL(s)>,
      "clusterId": <cluster id>,
      "yarnServiceName": <service name>,
      "rmRoleConfigGroup": <resource manager group name>
    }
  ]
}

Sample request

POST http://my-cluster-1.my-cluster.root.hwx.site:7180/cmf/clusters/Cluster%201/queue-manager-api/api/v1/environments/dev/clusters

{
  "provisioner": "CLOUDERA_MANAGER",
  "provisionerUrl": "my-cluster-1.my-cluster.root.hwx.site:7180",
  "clusters": [
    {
      "rmUrl": "my-cluster-2.my-cluster.root.hwx.site:7180",
      "clusterId": "Cluster 1",
      "yarnServiceName": "YARN-1",
      "rmRoleConfigGroup": "YARN-1-RESOURCEMANAGER-BASE"
    }
  ]
}

You can use a comma separated list to add multiple URLs of the Resource Manager.