[AMBARI-16379] The 'krb5-conf' configuration is not available

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.4.0
• Component/s: ambari-server
• Labels: kerberos
• Assignee: Robert Levas
• Reporter: Robert Levas
• Due: 10/May/16
• Created: 09/May/16 19:01
• Updated: 10/May/16 21:23
• Resolved: 10/May/16 18:10

Description

Configuration is loaded:

06 May 2016 10:52:11,998  INFO [qtp-ambari-client-26] ClusterImpl:346 - Service config types loaded: {KAFKA=[ranger-kafka-policymgr-ssl, kafka-log4j, kafka-env, kafka-broker, ranger-kafka-security, ranger-kafka-plugin-properties, ranger-kafka-audit], PIG=[pig-properties, pig-env, pig-log4j], ZEPPELIN=[zeppelin-env, zeppelin-config], LOGSEARCH=[logsearch-service_logs-solrconfig, logsearch-admin-json, logfeeder-log4j, logsearch-env, logsearch-solr-log4j, logfeeder-env, logsearch-audit_logs-solrconfig, logsearch-solr-env, logfeeder-properties, logsearch-properties, logsearch-log4j, logsearch-solr-client-log4j, logsearch-solr-xml], RANGER_KMS=[kms-properties, ranger-kms-security, ranger-kms-site, kms-site, kms-env, dbks-site, ranger-kms-audit, ranger-kms-policymgr-ssl, kms-log4j], MAPREDUCE2=[mapred-site, mapred-env], SLIDER=[slider-log4j, slider-env, slider-client], HIVE=[llap-cli-log4j2, hive-interactive-site, hive-exec-log4j, hive-env, ranger-hive-policymgr-ssl, tez-interactive-site, hive-site, hivemetastore-site, hive-interactive-env, webhcat-env, ranger-hive-plugin-properties, webhcat-site, hive-log4j, ranger-hive-audit, webhcat-log4j, hiveserver2-site, hcat-env, llap-daemon-log4j, ranger-hive-security], TEZ=[tez-env, tez-site], HBASE=[ranger-hbase-security, hbase-env, hbase-policy, hbase-log4j, hbase-site, ranger-hbase-policymgr-ssl, ranger-hbase-audit, ranger-hbase-plugin-properties], RANGER=[admin-properties, tagsync-log4j, ranger-site, ranger-ugsync-site, ranger-admin-site, ranger-tagsync-site, usersync-log4j, tagsync-application-properties, usersync-properties, admin-log4j, ranger-env], OOZIE=[oozie-log4j, oozie-env, oozie-site], FLUME=[flume-env, flume-conf], MAHOUT=[mahout-log4j, mahout-env], HDFS=[ssl-server, hdfs-log4j, ranger-hdfs-audit, ranger-hdfs-plugin-properties, ssl-client, hdfs-site, ranger-hdfs-policymgr-ssl, ranger-hdfs-security, hadoop-policy, hadoop-env, core-site], AMBARI_METRICS=[ams-ssl-client, ams-ssl-server, ams-hbase-log4j, ams-grafana-env, ams-hbase-policy, ams-hbase-security-site, ams-hbase-env, ams-env, ams-grafana-ini, ams-log4j, ams-site, ams-hbase-site], SPARK=[spark-thrift-fairscheduler, spark-thrift-sparkconf, spark-log4j-properties, spark-defaults, spark-metrics-properties, spark-hive-site-override, spark-env], SMARTSENSE=[hst-log4j, hst-server-conf, hst-common-conf, capture-levels, hst-agent-conf, anonymization-rules], YARN=[ranger-yarn-policymgr-ssl, yarn-site, ranger-yarn-audit, ranger-yarn-security, ranger-yarn-plugin-properties, yarn-env, capacity-scheduler, yarn-log4j], FALCON=[falcon-startup.properties, falcon-runtime.properties, falcon-env], SQOOP=[sqoop-site, sqoop-env], ZOOKEEPER=[zoo.cfg, zookeeper-env, zookeeper-log4j], STORM=[ranger-storm-plugin-properties, storm-site, ranger-storm-audit, storm-cluster-log4j, storm-worker-log4j, ranger-storm-policymgr-ssl, ranger-storm-security, storm-env], ATLAS=[atlas-hbase-site, atlas-log4j, atlas-env, application-properties], GANGLIA=[ganglia-env], KNOX=[knoxsso-topology, ranger-knox-security, users-ldif, knox-env, ranger-knox-plugin-properties, gateway-site, gateway-log4j, ranger-knox-policymgr-ssl, ranger-knox-audit, topology, admin-topology, ldap-log4j], KERBEROS=[kerberos-env, krb5-conf], ACCUMULO=[accumulo-log4j, accumulo-env, client, accumulo-site]}

But:

06 May 2016 12:43:46,050 ERROR [qtp-ambari-client-171] AbstractResourceProvider:314 - Caught AmbariException when getting a resource
org.apache.ambari.server.AmbariException: The 'krb5-conf' configuration is not available
	at org.apache.ambari.server.controller.KerberosHelperImpl.getKerberosDetails(KerberosHelperImpl.java:1903)
	at org.apache.ambari.server.controller.KerberosHelperImpl.addAmbariServerIdentity(KerberosHelperImpl.java:1364)
	at org.apache.ambari.server.controller.KerberosHelperImpl.getActiveIdentities(KerberosHelperImpl.java:1283)
	at org.apache.ambari.server.controller.internal.HostKerberosIdentityResourceProvider$GetResourcesCommand.invoke(HostKerberosIdentityResourceProvider.java:163)
	at org.apache.ambari.server.controller.internal.HostKerberosIdentityResourceProvider$GetResourcesCommand.invoke(HostKerberosIdentityResourceProvider.java:145)
	at org.apache.ambari.server.controller.internal.AbstractResourceProvider.getResources(AbstractResourceProvider.java:307)
	at org.apache.ambari.server.controller.internal.HostKerberosIdentityResourceProvider.getResources(HostKerberosIdentityResourceProvider.java:134)
	at org.apache.ambari.server.controller.internal.ClusterControllerImpl$ExtendedResourceProviderWrapper.queryForResources(ClusterControllerImpl.java:966)
	at org.apache.ambari.server.controller.internal.ClusterControllerImpl.getResources(ClusterControllerImpl.java:141)
	at org.apache.ambari.server.api.query.QueryImpl.doQuery(QueryImpl.java:512)
	at org.apache.ambari.server.api.query.QueryImpl.queryForSubResources(QueryImpl.java:464)
	at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:437)
	at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:217)
	at org.apache.ambari.server.api.handlers.ReadHandler.handleRequest(ReadHandler.java:69)
	at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:145)
	at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:126)
	at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:90)
	at org.apache.ambari.server.api.services.HostService.getHost(HostService.java:80)
	at sun.reflect.GeneratedMethodAccessor205.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)

Cause
This is caused in the org.apache.ambari.server.controller.internal.HostKerberosIdentityResourceProvider when the relevant host is the host where the Ambari server is installed and Kerberos is not enabled.

When querying information about a host via GET /api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME, the relevant Kerberos identities for that host are generated. This happens whether Kerberos is enabled or not. If the host is the host where the Ambari server is installed, than code is invoked to calculate the Ambari server's Kerberos identity. In this code, the Kerberos-specific configurations are retrieved. If Kerberos is not enabled, these configurations will not be available and thus the error, "The 'krb5-conf' configuration is not available", is encountered.

Solution

1. Stop calculating the Kerberos identities when Kerberos is not enabled
2. Protect access to the Kerberos configurations and set default values for needed configuration properties

Issue Links

• links to: ReviewBoard