python

Welcome to Cloudera Manager API Client!

Python Client

The python source is in the python directory. The Python client comes with a cm_api Python client module, and examples on performing certain Hadoop cluster administrative tasks using the Python client.

Getting Started

Here is a short snippet on using the cm_api Python client:

Python 2.7.2+ (default, Oct  4 2011, 20:06:09) 
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from cm_api.api_client import ApiResource
>>> api = ApiResource('rhel62-1.ent.cloudera.com', 7180, 'admin', 'admin')
>>> for h in api.get_all_hosts():
...   print h.hostname
... 
rhel62-2.ent.cloudera.com
rhel62-4.ent.cloudera.com
rhel62-3.ent.cloudera.com
rhel62-1.ent.cloudera.com
>>> 

Another example: getting all the services in a cluster:

>>> for c in api.get_all_clusters():
...   print c.name
... 
Cluster 1 - CDH4
>>> for s in api.get_cluster('Cluster 1 - CDH4').get_all_services():
...  print s.name
... 
hdfs1
mapreduce1
zookeeper1
hbase1
oozie1
yarn1
hue1
>>> 

Shell

After installing the cm_api Python package, you can use the API shell cmps (CM Python Shell):

$ cmps -H <host> --user admin --password admin
Welcome to the Cloudera Manager Console
Select a cluster using 'show clusters' and 'use'
cloudera> show clusters
+------------------+
|   CLUSTER NAME   |
+------------------+
| Cluster 1 - CDH4 |
| Cluster 2 - CDH3 |
+------------------+
cloudera> 

Please see the SHELL_README.md file for more.

Example Scripts

You can find example scripts in the python/examples directory.

• bulk_config_update.py --- Useful for heterogenous hardware environment. It sets the configuration on the roles running on a given set of hosts.