Stephen O'Donnell created HDDS-9729:
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Summary: Provide API to check a container via Replication Manager
Key: HDDS-9729
URL: https://issues.apache.org/jira/browse/HDDS-9729
Project: Apache Ozone
Issue Type: Sub-task
Components: SCM
Reporter: Stephen O'Donnell
Assignee: Stephen O'Donnell
Replication Manager has increasingly complex logic used to check if a container
is under or over replicated, unhealthy etc.
Other parts of the system, such as Decommission and Recon also need to know if
a set of containers are healthy or not, but they currently have their own logic
to do this, which can result in a mis-match in health states between RM and
Recon or decommission.
This PR exposes the container check chain used by RM to check containers, and
allows it to be called in a read-only way, avoiding any commands being sent.
The results of the call populate a ReplicationManagerReport instance passed
into the command, which allows the call to check the state of containers
checked.
In a later PR, we plan to integrate the Decommission Monitor with this API so
it does not have any of its own logic to determine if a container is
under-replicated or not.
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