Cloudera Manager API

The Cloudera Manager API provides configuration and service life cycle management, service health information and metrics, and allows you to configure Cloudera Manager itself. The API is served on the same host and port as the Cloudera Manager Admin Console, and does not require an extra process or extra configuration. The API supports HTTP Basic Authentication, accepting the same users and credentials as the Cloudera Manager Admin Console.

Resources

Here are some resources for your exploration:

Obtaining Configuration Files

  1. Obtain the list of a service's roles: 
    http://cm_server_host:7180/api/v8/clusters/clusterName/services/serviceName/roles
  2. Obtain the list of configuration files a process is using: 
    http://cm_server_host:7180/api/v8/clusters/clusterName/services/serviceName/roles/roleName/process
  3. Obtain the content of any particular file: 
    http://cm_server_host:7180/api/v8/clusters/clusterName/services/serviceName/roles/roleName/process/
configFiles/configFileName
    For example: 
    http://cm_server_host:7180/api/v8/clusters/Cluster%201/services/OOZIE-1/roles/
OOZIE-1-OOZIE_SERVER-e121641328fcb107999f2b5fd856880d/process/configFiles/oozie-site.xml

Retrieving Service and Host Properties

To update a service property using the Cloudera Manager APIs, you'll need to know the name of the property, not just the display name. If you know the property's display name but not the property name itself, retrieve the documentation by requesting any configuration object with the query string view=FULL appended to the URL. For example: 
http://cm_server_host:7180/api/v8/clusters/Cluster%201/services/service_name/config?view=FULL
Search the results for the display name of the desired property. For example, a search for the display name HDFS Service Environment Advanced Configuration Snippet (Safety Valve) shows that the corresponding property name is hdfs_service_env_safety_valve: 
{
   "name" : "hdfs_service_env_safety_valve",
   "require" : false,
   "displayName" : "HDFS Service Environment Advanced Configuration Snippet (Safety Valve)",
   "description" : "For advanced use onlyu, key/value pairs (one on each line) to be inserted into a roles
   environment. Applies to configurations of all roles in this service except client configuration.",
   "relatedName" : "",
   "validationState" : "OK"
}
Similar to finding service properties, you can also find host properties. First, get the host IDs for a cluster with the URL: 
http://cm_server_host:7180/api/v8/hosts
This should return host objects of the form: 
{
   "hostId" : "2c2e951c-aaf2-4780-a69f-0382181f1821",
   "ipAddress" : "10.30.195.116",
   "hostname" : "cm_server_host",
   "rackId" : "/default",
   "hostUrl" : "http://cm_server_host:7180/cmf/hostRedirect/2c2e951c-adf2-4780-a69f-0382181f1821",
   "maintenanceMode" : false,
   "maintenanceOwners" : [ ],
   "commissionState" : "COMMISSIONED",
   "numCores" : 4,
   "totalPhysMemBytes" : 10371174400
}
Then obtain the host properties by including one of the returned host IDs in the URL: 
http://cm_server_host:7180/api/v8/hosts/2c2e951c-adf2-4780-a69f-0382181f1821?view=FULL