@Michael Bronson
:: we want to upgrade to the latest HDP 3.1 and latest ambari 2.7.2
>>> Ambari 2.7.3 is better option and more recommended then Ambari 2.7.2. So if you are planning to upgrade Ambari then please go for Ambari 2.7.3 (instead of 2.7.2)
The Steps will be as following:
1. Upgrade Ambari-2.6.x to Ambari-2.7.3.
2. Then, use Ambari-2.7.3 to upgrade HDP-2.6.x to HDP-3.1.0.
Query: is it safe to jump from old HDP and ambari version to the latest ?
Yes, As per upgrade path you can upgrade from Ambari 2.6.1 to Ambari 2.7.3
Query: dose hortonwoks tested this scenario ? ( upgrade HDP 2.6.4 to HDP 3.1 )
Ambari 2.7.3 only supports fully managing a HDP 3.1.x cluster. Not all cluster management operations are supported when using Ambari 2.7.3 with HDP 2.6. Which means once the Ambari Upgrade to 2.7.3 is is best to start upgrading HDP to 3.1. So you should plan accordingly.
While you are planning to upgrade to Ambari 2.7.3 (from Ambari 2.6) then please also make a note to take a Ambari DB dump before the ambari upgrade and also go through the Supported DB versions from the following link. As you might also have to upgrade the Database.
DB related.
For example Ambari 2.6.1 supports Postgres 9.4 / 9.3 / 9.1.13+. MySQL 5.6 Maria DB 10.1. ...etc
But Ambari 2.7.3 is tested and certified with Postgres 10.5/ 10.2 / 9.6 and MySQL 5.7 and MariaDB 10.2 ....etc
https://supportmatrix.hortonworks.com/
Also during the Ambari upgrade following will be removed: Please refer to : https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/bk_ambari-upgrade-major/content/bhvr_change...
The Ambari 2.6.x to Ambari 2.7.3 (HDP 3.1) upgrade will remove the following views:
Hive View 1.5, Hive View 2
Hue To Ambari View Migration
Slider
Storm
Tez
Pig
Rest of the step by step instructions can be found in the following Doc:
https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/bk_ambari-upgrade-major/content/ambari_upgr...
It will be also good to go through the Ambari Release Notes specially the "Behaviour Change" & "New Features" of Ambari 2.7.0 / 2.7.1 / 2.7.3 before the upgrade so that you will be aware of some of the changes.
For example in case of Kerberos Environment you should have the kadmin/ principal existing in your KDC server already (or you will have to create one) as described in: https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/bk_ambari-upgrade-major-ppc/content/upgradi...
https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.0.0/bk_ambari-release-notes/content/ch_relnotes...
https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.1.0/bk_ambari-release-notes/content/ch_relnotes...
https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/ambari-release-notes/content/ambari_relnote...
