Chang Liu

> @cliu123 did you try running opensearch-min without security plugin? OpenSearch 3.0.0 is passing bwc tests with 2.0.1. Ref: https://github.com/opensearch-project/OpenSearch/blob/main/.ci/bwcVersions That's a good point! I haven't tried that as I...

@saratvemulapalli Are there any passing BWC test runs from 2.0.1 to 3.0.0? I don't see any BWC runs in GitHub actions in this repo. Would you please share a pointer...

@saratvemulapalli Thanks! But I don't see any tests upgrading to 3.0.0 in the reports/logs. The error included in the issue description shows that while the upgrade node tries to join...

@saratvemulapalli Would you please check or provide the logs upgrade from 2.0.1 to 3.0.0 without security plugin? I don't see the related logs in https://ci.opensearch.org/logs/ci/workflow/OpenSearch_CI/PR_Checks/Gradle_Check/gradle_check_6087.log. Did I miss anything?

The BWC test failure still persists: https://github.com/cliu123/security/runs/7434973804?check_suite_focus=true. Looks like node failed to join back to the cluster after upgrading. @CEHENKLE Could anyone take a look?

@amitgalitz also got BWC test failures when upgrading to 3.0.0 with job-scheduler plugin installed but without security plugin installed: https://github.com/opensearch-project/job-scheduler/runs/7415033030?check_suite_focus=true.

@kartg Thanks for looking into this and sharing your observations! I included the log that I had in the issue description. It was upgrading from 2.0.1 to 3.0.0, but failed.

There are multiple APIs in OpenSearch core still have master terminology, so security plugin cannot remove all of them: `node.master`, `ClusterChangedEvent.localNodeMaster()`, `org.opensearch.action.support.master`,`MasterNodeOperationRequestBuilder`.

>Through initial setup page, user configure the connected backend for dashboards to store meta information. What does user configure at this step? Does user select a DB to store meta...

>3.3.1 Feature based access control One of the options is to combine this with role-based access control. Having static roles for features, mapping the static roles to users would grant...