When setting up /etc/hosts, you can use whatever domain name you would like (just pick one arbitrarily). For example, host01.hadoop, host02.hadoop, etc., where "hadoop" is the chosen domain name.
Yusaku From: MBA <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Thursday, February 12, 2015 10:30 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: installation with Ambari This is turning into less about Ambari and more general computing. I'm trying to set up Hadoop on a home network. Not work, not on EC2; just a simple three node cluster in my personal computer lab. My machines don't belong to a domain. Everything I read says that in this situation, the computer name is the FQDN. Do I need to make a domain so my cluster will work properly? B. From: Yusaku Sako<mailto:[email protected]> Sent: Thursday, February 12, 2015 11:38 PM To: [email protected]<mailto:[email protected]> Subject: Re: installation with Ambari Hi Adaryl, Ambari expects FQDNs to be set on the hosts. On your hosts, you want to make sure that "hostname -f" returns the FQDN (with the domain name, like c6401.ambari.apache.org). Your /etc/hosts should look something like below (note that for each host, there's the FQDN followed by the short name): 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.64.101 c6401.ambari.apache.org c6401 192.168.64.102 c6402.ambari.apache.org c6402 192.168.64.103 c6403.ambari.apache.org c6403 For your future reference, you may want to ask Ambari-specific questions via [email protected]<mailto:[email protected]>. I hope this helps! Yusaku From: MBA <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Thursday, February 12, 2015 9:24 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: installation with Ambari I'm trying to set up a Hadoop cluster but Ambari is giving me issues. At the screen where it ask me to confirm host, I get: 1. Warning that I'm not inputting a fully qualified domain name. 2. The host that the Ambari instance is actually sitting on is not even registering. When run hostname -fqdn I get just the name of my machine. I put that into the screen asking for FQDNs and I just get a warning that it's not a FQDN. What exactly is Ambari expecting? B.
