[jira] [Created] (DRILL-5835) Deprecate special, hard-coded directories in Drill launch scripts

["Paul Rogers (JIRA)" <ji...@apache.org>]

Paul Rogers created DRILL-5835:
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             Summary: Deprecate special, hard-coded directories in Drill launch scripts
                 Key: DRILL-5835
                 URL: https://issues.apache.org/jira/browse/DRILL-5835
             Project: Apache Drill
          Issue Type: Improvement
    Affects Versions: 1.10.0
            Reporter: Paul Rogers
            Priority: Minor


Drill, since version 1.0, has attached special meaning to two global directories:

* {{/var/drill/log}} -- Default location for logs
* {{/etc/drill/conf}} -- Default location for config files

These locations are used by Drill QA to preserve files across Drill installs. All good.

However, as we automate testing, as we run multiple Drillbits per node, and as we host under YARN, these directories are becoming more of a problem than a help.

Proposed is:

* Deprecate these two directories
* Instruct QA (and other users) to use the {{--site}} option when launching Drill to point to the Drill "site" directory that can contain these files.

The site directory can be {{/etc/drill/conf}} or any other location. The {{drill-env.sh}} in that directory can point {{DRILL_LOG_DIR}} to {{/var/log/drill}}. But, by default, two different Drill installations won't try to overwrite each other's files as is done today.

QA still gets what they want (files that stay constant across Drill installs), but we end up with many fewer test cases for the launch scripts because we don't have to (awkwardly) test the shared, global directories.



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