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How to authenticate using hadoop delegation token file? #152

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Nithanaroy opened this issue Mar 22, 2020 · 1 comment
Open

How to authenticate using hadoop delegation token file? #152

Nithanaroy opened this issue Mar 22, 2020 · 1 comment

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@Nithanaroy
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client = KerberosClient('http://....:50070', delegate=True)
client.list('hdfs:///')

produces this error

INFO:hdfs.client:Instantiated <KerberosClient(url='http://*****:50070')>.
INFO:hdfs.client:Listing 'hdfs:///'.
DEBUG:hdfs.client:Resolved path '/' to '/'.
DEBUG:urllib3.connectionpool:Starting new HTTP connection (1): *****:50070
DEBUG:urllib3.connectionpool:http://*****:50070 "GET /webhdfs/v1/?op=GETHOMEDIRECTORY HTTP/1.1" 401 1538
DEBUG:requests_kerberos.kerberos_:handle_401(): Handling: 401
ERROR:requests_kerberos.kerberos_:generate_request_header(): authGSSClientStep() failed:
Traceback (most recent call last):
  File "/root/miniconda3/lib/python3.7/site-packages/requests_kerberos/kerberos_.py", line 230, in generate_request_header
    negotiate_resp_value)
kerberos.GSSError: (('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
ERROR:requests_kerberos.kerberos_:(('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
Traceback (most recent call last):
  File "/root/miniconda3/lib/python3.7/site-packages/requests_kerberos/kerberos_.py", line 230, in generate_request_header
    negotiate_resp_value)
kerberos.GSSError: (('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
DEBUG:requests_kerberos.kerberos_:handle_401(): returning <Response [401]>
DEBUG:requests_kerberos.kerberos_:handle_response(): returning <Response [401]>
DEBUG:requests_kerberos.kerberos_:handle_response() has seen 0 401 responses
DEBUG:requests_kerberos.kerberos_:handle_401(): Handling: 401
ERROR:requests_kerberos.kerberos_:generate_request_header(): authGSSClientStep() failed:
Traceback (most recent call last):
  File "/root/miniconda3/lib/python3.7/site-packages/requests_kerberos/kerberos_.py", line 230, in generate_request_header
    negotiate_resp_value)
kerberos.GSSError: (('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
ERROR:requests_kerberos.kerberos_:(('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
Traceback (most recent call last):
  File "/root/miniconda3/lib/python3.7/site-packages/requests_kerberos/kerberos_.py", line 230, in generate_request_header
    negotiate_resp_value)
kerberos.GSSError: (('Unspecified GSS failure.  Minor code may provide more information', 851968), ('No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_0)', -1765328243))
DEBUG:requests_kerberos.kerberos_:handle_401(): returning <Response [401]>
DEBUG:requests_kerberos.kerberos_:handle_response(): returning <Response [401]>
DEBUG:requests_kerberos.kerberos_:handle_response() has seen 1 401 responses
DEBUG:requests_kerberos.kerberos_:handle_response(): returning 401 <Response [401]>
ERROR:hdfs.client:b'<html>\n<head>\n<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>\n<title>Error 401 Authentication required. ....\n'

I know the location of hadoop token file. But I'm not sure how to convey this to the library. I'm able to run hadoop fs ... command successfully. Do I need to set any environment variables?
@Nithanaroy Nithanaroy changed the title How to authenticate using Kerberos delegation token file? How to authenticate using hadoop delegation token file? Mar 22, 2020
@Nithanaroy
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Nithanaroy commented Mar 22, 2020 •
edited
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I tried using TokenClient by passing token file path, raw token file contents, base64 encoded contents. I get a 500 or 403 errors.

with open("hdfs-delegation-token", "rb") as f:
    binary_token = f.read()
    base64_encoded_data = base64.b64encode(binary_token)
    token = base64_encoded_data.decode('utf-8')

client = hdfs.TokenClient("http://*****:50070", token=token)
client.list("hdfs:///data.txt")

403 Error: HdfsError: Failed to obtain user group information: java.io.EOFException
500 Error: None

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