After some more checking on the contents of the
/Recovered Items folder left over after my failed upgrade of OS X from Lion to Mountain Lion I decided to proceed with re-installation of the components to see if I could get things back as they were again.
The first step was to install the Server component again (which has gone missing after the upgrade). This only took a simple purchase of the
Server.app component in the App Store. After that I had a Mac Server again and could start my reinstallation.
The first component to reconfigure was the Open Directory component. It was extremely important for me not to lose that one as it contained all my users, their passwords and group membership as well as all the e-mail addresses each user had (I am hosting a few different domains, re-creating that would mean a lot of work).
When I enabled the Open directory server component, I had to specify how I wanted to configure that. This screen included an option to import a backup. As I still had the whole data structure from my previous installation, I tried that first but that did’t work. Then I noticed that the directory
/Recovered Items/private/var/backups/ contained a file called
ServerBackup_OpenDirectoryMaster.sparseimage that was less than a day old. I selected that file as backup, which was accepted to restore from and it looks like that did the trick. My users were restored and I could also login with my regular userID again.
Based on this initial success I decided to rebuild the rest of my server as I knew the other components (PostgreSQL, Postfix, Dovecot, etc) pretty well from when I hosted everything still on Linux… I will continue to document the steps I took as well as my custom setup as it may be useful for others.
Today I decided to (finally) upgrade my Mac Mini Server running OS X Lion Server to Mountain Lion Server. The upgrade was way overdue and Mountain Lion appeared to be pretty stable by now, so I decided to make the switch this weekend. Based on other’s good experiences, I had made a last Time Machine backup, disabled incoming mail on my firewall, purchased the update to Mountain Lion in the App Store and started the process.
Unfortunately after about 1 hour of processing i got a message like "Upgrade Failed, system will now restart". After this restart it turned out I was left with a vanilla install of Mac OS X on my Mac Mini Server. It even started to ask all the 1st time questions again including whether I wanted to register my server wit Apple again. Once I logged in it turned out that indeed I had a vanilla installation of the bare OS X Mountain Lion system on my Mac Mini Server, still without the Server components (which was expected). Fortunately all user data was still were it should be (in
/Users) but apart from that all system settings and other data (opendirectory, databases, mail, calendars, contacts, etc.) turned out to have moved to a folder called
/Recovered Items. Apple… WTF?
A quick scan indicated that no data appears to be lost (pfew…) but I need to do some investigation on how to recover from this and decide whether I want to restore my backups (which eventually won’t resove anything as the next upgrade would probably fail again). The good thing is that although my Mac Mini Server itself is vital for my infrastructure (it runs a few Linux VMs), but it’s own functions are limited to Nameserver, Mail/Calendar/Contact Server and Fileserver for my other Mac. This may be a good moment to start from scratch and document my customizations while recovering…