We have currently one cluster node that the OS has become unsupported, and the storage locations (i.e. the partitioning) is not as per Dynatrace best practices. We need to fix these points and at the same time fulfill high availability by adding the new cluster nodes (with supported OS and partitions as per best practices) and following the replication method.
My questions are:
1- Is it ok to add cluster nodes with an OS different than the one on the existing/original node?
2- Is it ok to add cluster nodes with disk partitions different than the ones on the existing/original node?
The above scenario (if supported) will be temporary until we finish the upgrade/migration
It is generally recommended that all nodes of a DT cluster be installed on the same infrastructure (hardware and software). Then you are sure that everything will work properly and in case of problems you have support from support.
Of course, you can add another node on a different OS or running on different hardware. This will probably work, but there may be all sorts of problems with the operation of individual components. Remember, too, that the master is the most important component of the DT cluster.