question Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7 in Archives of Support Questions (Read Only)

Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

xsy820000 — Thu, 14 Apr 2016 14:18:03 GMT

I try to deploy hadoop with non-root user through Ambari. I have already setup Ambari server successfully and deploying hadoop on Ambari web interface.On step 'Install Options', if I set the SSH User Account with ROOT,then I can go to the next step,but when I replace with my non-root user, then waiting for quite a time and finally shows the status 'Failed' message as below:

========================== Creating target directory... ========================== Command start time 2016-04-14 14:44:13 Automatic Agent registration timed out (timeout = 300 seconds). Check your network connectivity and retry registration, or use manual agent registration.

I have already set SSH free password login on root and non-root users and other essential configuration as well.Besides, I can pass the step 'Install Options' with root. Thus ,I'm quite sure that Non-root user fail the step because of lacking authority but don't know how to fix it.

Anyone has some suggestions?

Thanks.

Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

hkropp — Thu, 14 Apr 2016 15:25:57 GMT

1. First you need to make sure, that your none root user has sufficient sudoers rights. Please check this docuement:

http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.1.1/bk_Ambari_Security_Guide/content/_configuring_ambari_for_non-root.html

2. Next I suspect you setup password less SSH for the root user not the none-root user? I always prefer manual agent registration, but that is just me. Please check:

http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.1.1/bk_ambari_reference_guide/content/_install_the_ambari_agents_manually.html

A simple sed helps to do the manual registration:

$ sed -i 's/hostname=localhost/hostname=<ambari_server_fqdn>/' /etc/ambari-agent/conf/ambari-agent.ini

Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

tunglq_it — Fri, 15 Apr 2016 13:58:09 GMT

With this error, I think you should execute some step below:

1. To secure, you should use to ssh authen with key from ambari server to all nodes with non-root user.

2. For non-root user has sufficient sudoers rights.

I hope it is helped to you!

Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

xsy820000 — Mon, 18 Apr 2016 10:47:27 GMT

Thank you for your help ! Your first suggestion is helpful indeed, and I pass the step 'Install Options' finally after try several times installations. Next time I will try to manual agent registration for more flexible installation ways .

Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

xsy820000 — Mon, 18 Apr 2016 10:47:51 GMT

@hkropp

Re: Non-root user fail to deploy hadoop with Ambari 2.2.1 on CentOS 7

jeff1 — Tue, 19 Apr 2016 01:06:39 GMT

Also, since you are on CentOS7, just pointing out one more thing (that you might/might not hit once you get into the cluster install):

http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.1.1/bk_ambari_troubleshooting/content/_resolving_cluster_install_and_configuration_problems.html