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Ranger policies failed to refresh after implementing Kerberos

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author-rank frank93
Super Collaborator

Created ‎03-29-2017 10:03 AM

Hi guys,

Ranger fails to refresh policies after implementing Kerberos. I implemented Kerberos with new local MIT KDC, and using Ambari Automated Setup. HDFS, Hive and HBase works fine with new authentication method, but there are errors in refreshing policies. Every service where Ranger plugin is enabled gives me error:

2017-03-29 11:24:52,657 ERROR client.RangerAdminRESTClient (RangerAdminRESTClient.java:getServicePoliciesIfUpdated(124)) - Error getting policies. secureMode=true, user=nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS), response={"httpStatusCode":401,"statusCode":0}, serviceName=CLUSTER_hadoop
2017-03-29 11:24:52,657 ERROR util.PolicyRefresher (PolicyRefresher.java:loadPolicyfromPolicyAdmin(240)) - PolicyRefresher(serviceName=CLUSTER_hadoop): failed to refresh policies. Will continue to use last known version of policies (3)
java.lang.Exception: HTTP 401
        at org.apache.ranger.admin.client.RangerAdminRESTClient.getServicePoliciesIfUpdated(RangerAdminRESTClient.java:126)
        at org.apache.ranger.plugin.util.PolicyRefresher.loadPolicyfromPolicyAdmin(PolicyRefresher.java:217)
        at org.apache.ranger.plugin.util.PolicyRefresher.loadPolicy(PolicyRefresher.java:185)
        at org.apache.ranger.plugin.util.PolicyRefresher.run(PolicyRefresher.java:158)

Thats for HDFS, for other services the user is different (hive etc.). I am using HDP 2.5 and Ambari 2.4.1.

These users exist in Kerberos (klist):

hive/hadoop1.locald@EXAMPLE.COM
hive/hadoop2.locald@EXAMPLE.COM
hive/hadoop3.locald@EXAMPLE.COM
hive/hadoop4.locald@EXAMPLE.COM
infra-solr/hadoop1.locald@EXAMPLE.COM
jhs/hadoop2.locald@EXAMPLE.COM
jn/hadoop1.locald@EXAMPLE.COM
jn/hadoop2.locald@EXAMPLE.COM
jn/hadoop3.locald@EXAMPLE.COM
kadmin/admin@EXAMPLE.COM
kadmin/changepw@EXAMPLE.COM
kadmin/hadoop1.locald@EXAMPLE.COM
kafka/hadoop1.locald@EXAMPLE.COM
knox/hadoop1.locald@EXAMPLE.COM
krbtgt/EXAMPLE.COM@EXAMPLE.COM
livy/hadoop1.locald@EXAMPLE.COM
livy/hadoop2.locald@EXAMPLE.COM
livy/hadoop4.locald@EXAMPLE.COM
nm/hadoop1.locald@EXAMPLE.COM
nm/hadoop2.locald@EXAMPLE.COM
nm/hadoop3.locald@EXAMPLE.COM
nm/hadoop4.locald@EXAMPLE.COM
nn/hadoop1.locald@EXAMPLE.COM
nn/hadoop2.locald@EXAMPLE.COM
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1 ACCEPTED SOLUTION

avatar
author-rank ds5634
Explorer

Created ‎03-31-2017 01:03 AM

We were getting the same error and after troubleshooting for some time we found that Ranger policymgr_external_url (in Ambari under Ranger -> Configs -> Advanced -> Ranger Settings -> External URL) was improperly set to the Ranger hosts IP address. We changed that to the FQDN and restarted the effected service (e.g HS2 for hive, NN for HDFS, etc) and the problem was resolved.

Give that a look and shot if applicable.

View solution in original post

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26 REPLIES 26

avatar
author-rank dsharma author-rank
Guru

Created on ‎03-29-2017 10:18 AM - edited ‎08-18-2019 02:13 AM

can you please check if ranger is also kerberised , because if it is hdp2.5 or above then it will be kerberised.

if it is then can you please try following

1) regenerating keytabs from ambari and restart the services.

2) add following properties in the repos on ranger:

policy.grantrevoke.auth.users: hbase ( or corresponding service user)

tag.download.auth.users: hbase ( or corresponding service user)

policy.download.auth.users: hbase (or corresponding service user)

same way these properties to be added in hdfs repo too , and service user will be hdfs or what ever you have in your cluster.

14180-screen-shot-2017-03-29-at-34826-pm.png

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avatar
author-rank frank93
Super Collaborator

Created ‎03-29-2017 10:47 AM

@Deepak Sharma thank you for a quick answer. Ranger is also Kerberized. I added those properties and changed Authentication Type in HDFS Repo to Kerberos. Now Test connection is done successfully, but the same error appears. After these changes few INFO logs appeared:

2017-03-29 12:46:23,368 ERROR client.RangerAdminRESTClient (RangerAdminRESTClient.java:getServicePoliciesIfUpdated(124)) - Error getting policies. secureMode=true, user=nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS), response={"httpStatusCode":401,"statusCode":0}, serviceName=3SOFT_HDL_hadoop
2017-03-29 12:46:23,368 ERROR util.PolicyRefresher (PolicyRefresher.java:loadPolicyfromPolicyAdmin(240)) - PolicyRefresher(serviceName=3SOFT_HDL_hadoop): failed to refresh policies. Will continue to use last known version of policies (3)
java.lang.Exception: HTTP 401
        at org.apache.ranger.admin.client.RangerAdminRESTClient.getServicePoliciesIfUpdated(RangerAdminRESTClient.java:126)
        at org.apache.ranger.plugin.util.PolicyRefresher.loadPolicyfromPolicyAdmin(PolicyRefresher.java:217)
        at org.apache.ranger.plugin.util.PolicyRefresher.loadPolicy(PolicyRefresher.java:185)
        at org.apache.ranger.plugin.util.PolicyRefresher.run(PolicyRefresher.java:158)
2017-03-29 12:46:24,577 WARN  protocol.ResponseProcessCookies (ResponseProcessCookies.java:processCookies(122)) - Cookie rejected [hadoop.auth="", version:0, domain:hadoop1.locald, path:/, expiry:Thu Jan 01 01:00:00 CET 1970] Domain attribute "hadoop1.locald" violates the Netscape cookie specification
2017-03-29 12:46:24,582 WARN  protocol.ResponseProcessCookies (ResponseProcessCookies.java:processCookies(122)) - Cookie rejected [hadoop.auth=""u=nn&p=nn/hadoop1.locald@EXAMPLE.COM&t=kerberos&e=1490820384581&s=hi0THf8d5c4wUgzQbs/+W/PENPo="", version:0, domain:hadoop1.locald, path:/, expiry:Wed Mar 29 22:46:24 CEST 2017] Domain attribute "hadoop1.locald" violates the Netscape cookie specification
2017-03-29 12:46:25,229 INFO  BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1580)) - BLOCK* neededReplications = 0, pendingReplications = 0.
2017-03-29 12:46:27,578 WARN  protocol.ResponseProcessCookies (ResponseProcessCookies.java:processCookies(122)) - Cookie rejected [hadoop.auth="", version:0, domain:hadoop1.locald, path:/, expiry:Thu Jan 01 01:00:00 CET 1970] Domain attribute "hadoop1.locald" violates the Netscape cookie specification
2017-03-29 12:46:27,582 WARN  protocol.ResponseProcessCookies (ResponseProcessCookies.java:processCookies(122)) - Cookie rejected [hadoop.auth=""u=nn&p=nn/hadoop1.locald@EXAMPLE.COM&t=kerberos&e=1490820387581&s=S0zta5LH3SfBXFh0XoB3T5ldjsQ="", version:0, domain:hadoop1.locald, path:/, expiry:Wed Mar 29 22:46:27 CEST 2017] Domain attribute "hadoop1.locald" violates the Netscape cookie specification
2017-03-29 12:46:28,230 INFO  BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1580)) - BLOCK* neededReplications = 0, pendingReplications = 0.
2017-03-29 12:46:28,474 INFO  ipc.Server (Server.java:saslProcess(1538)) - Auth successful for nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS)
2017-03-29 12:46:28,475 INFO  authorize.ServiceAuthorizationManager (ServiceAuthorizationManager.java:authorize(137)) - Authorization successful for nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS) for protocol=interface org.apache.hadoop.hdfs.protocol.ClientProtocol
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avatar
author-rank dsharma author-rank
Guru

Created on ‎03-29-2017 11:00 AM - edited ‎08-18-2019 02:13 AM

did you regenerated keytabs and restarted service?

14193-screen-shot-2017-03-29-at-42948-pm.png

14,449 Views

avatar
author-rank frank93
Super Collaborator

Created ‎03-29-2017 11:20 AM

Yes, I regenerated keytabs and restarted services. I dont get it: The log:

2017-03-29 13:26:35,429 ERROR client.RangerAdminRESTClient (RangerAdminRESTClient.java:getServicePoliciesIfUpdated(124)) - Error getting policies. secureMode=true, user=nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS), response={"httpStatusCode":401,"statusCode":0}, serviceName=CLUSTER_hadoop
2017-03-29 13:26:35,429 ERROR util.PolicyRefresher (PolicyRefresher.java:loadPolicyfromPolicyAdmin(240)) - PolicyRefresher(serviceName=CLUSTER_hadoop): failed to refresh policies. Will continue to use last known version of policies (3)
java.lang.Exception: HTTP 401

says user nn/hadoop1.locald@EXAMPLE.COM us unauthorized (HTTP 401), but below is:

2017-03-29 13:26:38,877 INFO  ipc.Server (Server.java:saslProcess(1538)) - Auth successful for nn/hadoop1.locald@EXAMPLE.COM (auth:KERBEROS)
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avatar
author-rank dsharma author-rank
Guru

Created ‎03-29-2017 11:49 AM

can you check hadoop.security.auth_to_local config in hdfs & hdfs repo also , if rule is specified for nn ,

RULE:[2:$1@$0](nn@EXAMPLE.COM)s/.*/hdfs/

so that call is sent as hdfs user , and since hdfs user is in policy,download.auth.users so it will be alllowed to download the policy and make sure same config is pres in hdfs repo config also

check this config:

RULE:[1:$1@$0](.*@EXAMPLE.COM)s/@.*//
RULE:[2:$1@$0](activity_analyzer@EXAMPLE.COM)s/.*/activity_analyzer/
RULE:[2:$1@$0](activity_explorer@EXAMPLE.COM)s/.*/activity_explorer/
RULE:[2:$1@$0](amshbase@EXAMPLE.COM)s/.*/ams/
RULE:[2:$1@$0](amszk@EXAMPLE.COM)s/.*/ams/
RULE:[2:$1@$0](atlas@EXAMPLE.COM)s/.*/atlas/
RULE:[2:$1@$0](dn@EXAMPLE.COM)s/.*/hdfs/
RULE:[2:$1@$0](hbase@EXAMPLE.COM)s/.*/hbase/
RULE:[2:$1@$0](hive@EXAMPLE.COM)s/.*/hive/
RULE:[2:$1@$0](jhs@EXAMPLE.COM)s/.*/mapred/
RULE:[2:$1@$0](knox@EXAMPLE.COM)s/.*/knox/
RULE:[2:$1@$0](nfs@EXAMPLE.COM)s/.*/hdfs/
RULE:[2:$1@$0](nm@EXAMPLE.COM)s/.*/yarn/
RULE:[2:$1@$0](nn@EXAMPLE.COM)s/.*/hdfs/
RULE:[2:$1@$0](rangeradmin@EXAMPLE.COM)s/.*/ranger/
RULE:[2:$1@$0](rangertagsync@EXAMPLE.COM)s/.*/rangertagsync/
RULE:[2:$1@$0](rangerusersync@EXAMPLE.COM)s/.*/rangerusersync/
RULE:[2:$1@$0](rm@EXAMPLE.COM)s/.*/yarn/
RULE:[2:$1@$0](yarn@EXAMPLE.COM)s/.*/yarn/
DEFAULT
14,449 Views

avatar
author-rank dsharma author-rank
Guru

Created ‎03-29-2017 12:01 PM

can you share screenshot of your repo config , I want to see which is the repo user ?

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avatar
author-rank frank93
Super Collaborator

Created on ‎03-29-2017 12:31 PM - edited ‎08-18-2019 02:13 AM

@Deepak Sharma Sorry I missed this comment, here is my config:14189-przechwytywanie.png

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avatar
author-rank frank93
Super Collaborator

Created ‎03-29-2017 11:57 AM

I have exactly the same rules that you uploaded, both in hdfs and hdfs repo. I deleted my old repo and let Ambari create new one, and the newly created HDFS repo has correct configs and test connection is done successfully.

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avatar
author-rank dsharma author-rank
Guru

Created on ‎03-29-2017 12:05 PM - edited ‎08-18-2019 02:13 AM

and can you please change the repo user to hdfs if it is something else

14186-screen-shot-2017-03-29-at-53526-pm.png14186-screen-shot-2017-03-29-at-53526-pm.png

14,449 Views
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