I am in the process of planning an upgrade from an Elastic Stack installed before my time. I've got all of the relevant upgrade docs (starting with the upgrade guide), but have a question about upgrading using the MSI when the previous install looks like it has used the unpacking a zip method.
When I run the 5.6 MSI installer it doesn't detect the previous install (5.3.2 - installation files in c:\elasticsearch and path.data/path.logs/path.repo in e:\elasticsearch), presumably because there are no reg keys set by an installer?
What I wanted to know was the optimal way to upgrade using MSI in this situation? Should I essentially treat it as a new install and migrate the indices data in and update config files or is there a way to get the MSI to detect the previous version?
Thanks in advance