Because the hadoop services also need to use certificates when Kerberos is enabled. For example for the hdfs service and in case we have two hosts host1. Means that you forgot to deploy the client configuration, so the hadoop configuration used by the client still uses simple authentication, but Kerberos is enabled on the cluster. When enabling security with Hadoop each user should have a Kerberos principal configured. The rest of the series contains:
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To see the error details we set logging level:. We need to update the krbtgt principal for our realm, because KDC cannot hand out tickets with a longer lifetime than the lifetime of the krbtgt principal. This can be found on the Cloudera website: Of course this solution will also involve some configuration to enable Cloudera Manager to generate the clouddera correctly. It also makes sure that you will make less mistakes Luckily Cloudera Manager has quite good documentation about what you need to change to enable Kerberos.
cloudera - CDH4.x : Installation hangs there - Stack Overflow
Make sure that DNS is configured correctly. Use kadmin to make the hue certificate renewable.
I've tried two different approaches:. If you want to be really sure that HDFS is working properly, you can copy a bigger file file size should be greater than your block size -- which is by default MB and then check that the blocks are properly replicated.
You can try to change the value of min. The challenge was to identify solutions how we could integrate Active Directory with Hadoop's security.
The rest of the series contains:. The rest of the series contain: In case we would not configure a one-way cross-realm trust, all these users would end up in our production Active Directory or KDC server.
This can be done by following the steps on the Cloudera website: I showed you the steps which you need to follow using bash commands. You can see the block number on the Namenode web UI http: Search for the Datanode Transceiver Port property and specify a privileged port number below For example for the hdfs service and in nanager we have two hosts host1.
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I didn't need to install HBase on the secure cluster, so Manater did not test these. Not all services are running on all hosts, so for example you shouldn't expect a hue credential generated for each host.
You can chose any one of your Impala Daemon hosts. Exception encountered while connecting to the server: To understand Kerberos and what you need to do to set up a Kerberos server, see Kerberos basics and installing a KDC When enabling security with Hadoop each user should have a Kerberos principal configured.
No valid credentials provided Mechanism level: Introduction to Cloudera Manager Installation. You can also use "hadoop dfsadmin -report" which gives a similar output to fsck, but on a per node basis. Organizations which already have an Active Directory to manage user account, aren't keen in managing another set of user accounts separately in MIT Kerberos. You will only have a hue credential for the host where hue is running.
You can do this by going to the Hue service configuration in Cloudera Manager and find the Hue Cloudsra Valve properties. Doing this on one machine is acceptable, but when you have a cluster with 6 node you already want to be able to do the provisioning from one central machine and deploy it to the rest.
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First it might seem scary and complicated but after you figured it out once, you'll realize it's not that hard. Couldn 't renew kerberos ticket in order to work around Kerberos 1. In Hadoop there is a setting, min. Go to Cloudera Manager page and Deploy Client configuration.
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