István Fajth created HDDS-8612:
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Summary: Notify OM about updated rootCA rotation time
Key: HDDS-8612
URL: https://issues.apache.org/jira/browse/HDDS-8612
Project: Apache Ozone
Issue Type: Sub-task
Reporter: István Fajth
As OM has to update the rootCA certificate similarly to the DN, and as there is
no current communication for this, we need to figure out how we can update the
OM about the time of the rootCA rotation.
We have a few possibilities:
- OM can poll for the new rootCA certificate periodically regardless of the
fact whether we expect a new rootCA cert or not, or it can poll for the timing
update. Considering 3 OMs, and the simplicity of this call, it does not add
visible load onto the SCM if we check every minute. (This seems to be our best
and simplest option)
- We may extend the payload of responses to requests sent from OM to SCM, and
if there is a timing update, we process it. (This would be an additional thing
to look at in OM's SCM client, and we most likely do not want to add these
extra cycles there for every such response processing.)
- we introduce an API on OM that is called from the admin CLI client (This has
the problem of keeping consistency between the nodes)
- we introduce an API on the OM and update the OM from SCM. (This is not really
feasible, as SCM is not currently the client of OM)
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