[jira] [Updated] (AMBARI-16107) Refactor technical debt to cleanup usage of params.version and other variables during RU/EU

["Wei-Chiu Chuang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-16107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei-Chiu Chuang updated AMBARI-16107:
-------------------------------------
    Fix Version/s: 3.1.0
                       (was: 3.0.0)

> Refactor technical debt to cleanup usage of params.version and other variables during RU/EU
> -------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-16107
>                 URL: https://issues.apache.org/jira/browse/AMBARI-16107
>             Project: Ambari
>          Issue Type: Story
>          Components: ambari-server
>    Affects Versions: 2.4.0
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>            Priority: Major
>             Fix For: 3.1.0
>
>
> The service scripts each use their own method of how to get the version that the stack is on and in many cases the confusion leads to bugs and regressions.
> This is because we use
> * /hostLevelParams/stack_version to represent the version that is "desired", such as 2.2 or 2.3
> * /commandParams/request_version (not sure what this is)
> * /commandParams/version for the version upgrading or downgrading to, which includes the build number
> * /commandParams/downgrade_from_version when in RU/DU and doing a downgrade, this includes the build number as well
> And the methods in hdp_select.py and conf_select.py tend to do hacky things.
> We need a consistent way of getting the different types of version (e.g., only the major and minor, full with build number, the version during an RU/EU), and perhaps even put it in Script.py so that there's less confusion between scripts.
> Further, params.version was needed only during RU/EU restart commands, but now scripts are using it for checks even on fresh install and need to make comparisons like >= 2.3.4.0



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