[jira] [Resolved] (AMBARI-8898) Implement all pre-upgrade checks

["Yurii Shylov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-8898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yurii Shylov resolved AMBARI-8898.
----------------------------------
    Resolution: Fixed

> Implement all pre-upgrade checks 
> ---------------------------------
>
>                 Key: AMBARI-8898
>                 URL: https://issues.apache.org/jira/browse/AMBARI-8898
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Yurii Shylov
>            Assignee: Yurii Shylov
>             Fix For: 2.0.0
>
>
> The following checks should be implemented:
> *All* cluster hosts must satisfy the following:
> 1) It is either in Host Maintenance Mode or heartbeating with the server
> 2) If in Host Maintenance Mode, there are no masters on the host
> 3) If not in Host Maintenance Mode, it must have new version installed
> *All* of the following must be satisfied:
> 1) NameNode HA is enabled
> 2) Make sure work-preserving RM/NM restart is enabled in YARN configuration files
> 3) MR Jobs need to reference the Hadoop libraries from the distributed cache instead of the cluster
> 4) Tez jobs need to reference the Hadoop libraries from the distributed cache instead of the cluster
> 5) Oozie jobs need to reference the Hadoop libraries from the distributed cache instead of the cluster
> 6) All services must be up, not in Service Maintenance Mode, and operational (all components are up and service check should pass*).
> 7) All DataNode decommissioning must be completed (no DataNode in “decommissioning” state)



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