We are hoping to do a fresh install of the latest version (14.0) and copy over data from our currently running 12.1.6. We are running a high availability setup on AWS. We are hoping to:
- Build up a fresh HA cluster on the latest versions of everything
- Ensure it is working
- Define a copy procedure that allows us to copy data over from our running version and migrate it to the new version
- Run the copy procedure
- Test to make sure all is functioning
- Schedule a switchover to the new stack
- Suspend old stack
- Run copy procedure again
- After some time of successful operation on new stack, retire old stack entirely
Is this feasible?