Commits on Jun 14, 2022

1. Support dynamic node role (#3436) …

   * Support unknown node role
   
   Currently OpenSearch only supports several built-in nodes like data node
   role. If specify unknown node role, OpenSearch node will fail to start.
   This limit how to extend OpenSearch to support some extension function.
   For example, user may prefer to run ML tasks on some dedicated node
   which doesn't serve as any built-in node roles. So the ML tasks won't
   impact OpenSearch core function. This PR removed the limitation and user
   can specify any node role and OpenSearch will start node correctly with
   that unknown role. This opens the door for plugin developer to run
   specific tasks on dedicated nodes.
   
   Issue: #2877
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * fix cat nodes rest API spec
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * fix mixed cluster IT failure
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * add DynamicRole
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * change generator method name
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * fix failed docker test
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * transform role name to lower case to avoid confusion
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * transform the node role abbreviation to lower case
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * fix checkstyle
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   
   * add test for case-insensitive role name change
   
   Signed-off-by: Yaliang Wu <ylwu@amazon.com>
   (cherry picked from commit e9c5ce3)

   

   ylwu-amzn authored and github-actions[bot] committed Jun 14, 2022
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