I am testing a rolling upgrade from 7.2.7 to 8.6. I say testing because I am using a copy of my VM to conduct these tests.
The VM copy is not attached to the network in any fashion to avoid undesirable issues. To begin I executed install.sh but it
blathered errors about LDAP. Oh joy. Stumbling through the forums I ran across an ill advised method or two which I tried.
The first was to change things to LDAPS because this presumably had worked for one person having the same issue. Well
that didn't work out but did succeed in breaking LDAP. Then I ran across running 'install.sh --skip-upgrade-check'.
Which seemed to work but ultimately also ended in broken LDAP. Thankfully all of this has occurred during testing and not in
a live upgrade scenario. Praise be to virtual machines. So my question is, what is necessary for this upgrade to succeed?
I have not yet come across the 'secret sauce'.
FWIW, the certificates are fine and do not expire until 2020. The hostname and networking
are unchanged from the production (running) host as the network is simply not connected. Host resolution is being done by a hostfile
188.8.131.52 server.test.com server
(sample information reflecting actual entry)