cm_api.api_client.ApiException: HTTP Error 401: basic auth failed (error 401)

[#1]

Hi Friends,

Getting the following exception:

cm_api.api_client.ApiException: HTTP Error 401: basic auth failed (error 401)

CM is on the same host where I am executing the python script. Seems a very basic error. Passing admin CM credentials. Seeking pointers to 

- which port is it using?

- do I have to enable CM REST API?

- anyothers?

Complete stack trace.

[rizwmian@w0575oslshcea01 cluster_diff]$ python --version
Python 2.6.6
[rizwmian@w0575oslshcea01 cluster_diff]$ cdh.py
Traceback (most recent call last):
File "./cdh.py", line 67, in <module>
main()
File "./cdh.py", line 62, in main
cluster = find_cluster(api, None)
File "./cdh.py", line 12, in find_cluster
all_clusters = api.get_all_clusters()
File "/usr/lib/python2.6/site-packages/cm_api/api_client.py", line 128, in get_all_clusters
return clusters.get_all_clusters(self, view)
File "/usr/lib/python2.6/site-packages/cm_api/endpoints/clusters.py", line 66, in get_all_clusters
params=view and dict(view=view) or None)
File "/usr/lib/python2.6/site-packages/cm_api/endpoints/types.py", line 139, in call
ret = method(path, params=params)
File "/usr/lib/python2.6/site-packages/cm_api/resource.py", line 110, in get
return self.invoke("GET", relpath, params)
File "/usr/lib/python2.6/site-packages/cm_api/resource.py", line 73, in invoke
headers=headers)
File "/usr/lib/python2.6/site-packages/cm_api/http_client.py", line 174, in execute
raise self._exc_class(ex)
cm_api.api_client.ApiException: HTTP Error 401: basic auth failed (error 401)

cm_api.api_client.ApiException: HTTP Error 401: basic auth failed (error 401)

[#2 · Accepted solution]

Figured out. Need both:
- username/password to connect to cm api
- user launching script to have valid kerberos ticket (surprising find)

Thanks everyone. 🙂

[#3]

Hello,

i am also facing the same issue . can you please elaborate what exactly you did.

Thank you.

-avi

[#4]

@ParidaAbinash

In order to use the API, you must provide authenticate to CM.  See the example here:

https://cloudera.github.io/cm_api/docs/python-client/

# Get a handle to the API client
from cm_api.api_client import ApiResource

cm_host = "cm-host"
api = ApiResource(cm_host, username="admin", password="admin")

# Get a list of all clusters
cdh4 = None
for c in api.get_all_clusters():
  print c.name
  if c.version == "CDH4":
    cdh4 = c

[#5]

Thanks ,

i figured out the issue.

i was passing the credentials but as it was a new service id , i had not added it with our hadoop group.

so the credential also couldnot be logged in to cloudera manager (which i hadnt checked earlier ,as it was working fine while logging into the server )