question Re: Adding multiple host while on install options step of ambari server in Archives of Support Questions (Read Only)

Adding multiple host while on install options step of ambari server

Kunal.Gaikwad — Thu, 11 Feb 2016 20:28:59 GMT

I am setting up a 3 node cluster using HDP 2.3 stack and ambari 2.2.0. While, on the step to install options. As I understand i need to state the FQDNS of all the 3 nodes (FQDNs of 3 vsphere VMs in my case). In the Target Hosts text box I am entering I 3 nodes FQDNs each on a new line, But what do I do about the key? I mean, how do I paste or select the SSH-private key for all the 3 hosts. I only get an option to select one, because of which one gets successfully installed, and the other 2 fail.

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Thu, 11 Feb 2016 20:30:42 GMT

@Kunal Gaikwad

You will be pasting key of ambari-server

cd ~/.ssh

get the private key and paste in there...You need private key only from ambari server.

If you are doing manual agent install then you dont need to do this.

Re: Adding multiple host while on install options step of ambari server

Kunal.Gaikwad — Thu, 11 Feb 2016 20:58:24 GMT

A bit unclear! I have 3 nodes (CentOS1.XXXX.net CentOS2.XXX.net CentOS3.XXX.net), so I need to mention all 3 FQDNs in the Target host text box or not? As, I was under the impression I need to mention all 3 FQDNs and keys. Now that you have informed me, I need to only mention the 1st one since that is my ambari server. I Read the caption on the page saying "Enter the list of hosts to be included in the cluster and provide your SSH key." so I thought I need to mention all of them.

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Thu, 11 Feb 2016 20:59:00 GMT

@Kunal Gaikwad

Yes all nodes fqdn

Ssh key only from ambari sever

Re: Adding multiple host while on install options step of ambari server

Kunal.Gaikwad — Thu, 11 Feb 2016 21:00:54 GMT

So on the next page when it say successful to the 1st node and failed for the rest 2 its fine? on the COnfirm Hosts page

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Thu, 11 Feb 2016 21:06:27 GMT

@Kunal Gaikwad

What's the error ?

Re: Adding multiple host while on install options step of ambari server

Kunal.Gaikwad — Thu, 11 Feb 2016 21:13:47 GMT

@Neeraj Sabharwal The next Confirm Host page shows me the following error in the table

Remove Selected Retry Failed Show:All (3)|Installing (0)|Registering (0)|Success (1)|Fail (2)

Host	Progress	Status
centos1.XXXX.net	Success	Remove
centos2.XXXX.net	Failed	Remove
centos3.XXXX.net	Failed	Remove

All host checks passed on 1 registered hosts. Note: Host checks were skipped on 2 hosts that failed to register.

Re: Adding multiple host while on install options step of ambari server

rahulpathak109 — Thu, 11 Feb 2016 22:01:22 GMT

@Kunal Gaikwad

You have to use same key pair on all the hosts.

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Thu, 11 Feb 2016 23:07:18 GMT

@Kunal Gaikwad That does not help. You need to click on failed host and see the error...FYI

If you read errors very carefully then you can find the issue and fix

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Thu, 11 Feb 2016 23:10:18 GMT

@Kunal Gaikwad

Please watch this https://www.youtube.com/watch?v=xeT3A1nha6g&ab_channel=DeepAdmin

Re: Adding multiple host while on install options step of ambari server

Shelton — Thu, 11 Feb 2016 23:52:41 GMT

@Kunal Gaikwad

Find attached below a step to step setup walk through

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Fri, 12 Feb 2016 08:05:43 GMT

@Kunal Gaikwad Please see this and do watch the video https://gist.github.com/nsabharwal/683adf76260ea9010532

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Sat, 13 Feb 2016 23:09:14 GMT

@Kunal Gaikwad Can you close the thread by accepting one of the answers if its resolved?

Re: Adding multiple host while on install options step of ambari server

nsabharwal — Mon, 15 Feb 2016 20:06:13 GMT

@Kunal Gaikwad I can see that you were able to install the cluster. Please accept one of the answers to close the thread.

Re: Adding multiple host while on install options step of ambari server

vpoornalingam — Tue, 16 Feb 2016 13:22:35 GMT

@Kunal Gaikwad ensure that before you start the installation, the nodes in the cluster can do a password less ssh across. Ie generate a ssh in the Ambari Server and then copy the same across all the nodes [including Ambari server if you want some services to be installed]. Then you just have to copy this ssh key during installation. If you do not want to have the same ssh, then you have to do a manual registration - ie install amabri-agent manually on the nodes and then proceed further.

Re: Adding multiple host while on install options step of ambari server

ashneesharma88 — Wed, 17 Feb 2016 01:15:03 GMT

Before installation ensure that on all server firewall should be disable or rules should be configured and ntp service also on .