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Unable to register host while creating Apache Ambari cluster

I am trying to create localhost Apache Ambari cluster on CentOS7. I am using Ambari 2.2.2 binaries downloaded and installed from the Ambari repository with the following commands

cd /etc/yum.repos.d/
wget  http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.2.2.0/ambari.repo
yum install ambari-server
ambari-server setup
ambari-server start

Before starting the server I have done all the necessary preparations steps described on the Hortonworks including the setup of passwordless ssh, which is frequent reason of problems according to the posts found on the internet. I verify it with

ssh root@localhost

During the creation of cluster in the "Install options" window I enter the name of the host I want to create (localhost in my case) and have already tried both of the options, which are

  • providing rsa secret key direktly - in this case the next window simply stucks in the "Installing" stage and does not go any further, showing no errors
  • performing manual registration of hosts.

For the second option I have downloaded and installed ambari-agent

yum install ambari-agent
ambari-agent start

In case of manual host registration I am getting the following error

"Host checks were skipped on 1 hosts that failed to register.".

When I click on "Failed", which in some cases described over the internet is supposed to deliver more precise description of a problem I see the following "Registering with the server... Registration with the server failed."

As a result I don't even now where to start searching for the possible reasons of this error.

Solution

  • Ambari cluster nodes need to be configured with a Fully Qualified Domain Name (FQDN). localhost is not an FQDN. You will need to configure the node with an FQDN and then retry the installation. You could use something like: localhost.local which is an FQDN. This requirement and how to configure the node to meet it are documented in the pre-requirements. From the HDP documentation:

    All hosts in your system must be configured for both forward and and reverse DNS.

    If you are unable to configure DNS in this way, you should edit the /etc/hosts file on every host in your cluster to contain the IP address and Fully Qualified Domain Name of each of your hosts.