We are running Apache Druid 0.22.1 deployed on Kubernetes with Druid Operator.
Can’t find any detailed instructions on Druid’s version upgrade process. The only thing I found is to set the
[rollingDeploy](https://github.com/druid-io/druid-operator/blob/master/docs/features.md#Rolling-Deploy) parameter to
true, so it will upgrade pods one by one, as described in the Rolling updates.
But what is the process?
As I assume, I need to update the Docker tag from the
apache/druid:0.22.1 to the
apache/druid:0.25.0 in Druid’s CustomResource and deploy the changes.
Is it correct?
Also, is it safe to upgrade right away from 22 to 25, or better to run one by one,e.g. first to 0.23, then 24.0, and finally to the 25.0?