I recently upgraded my home-brew NAS from OpenMediaVault 2.2.14 (Stone burner) to openmediavault 3.0.86 (Erasmus). It’s recommended that you do a fresh install but I thought I’d give the upgrade a shot as it was only a 10TB recovery if it went pear-shaped (!). They also recommend you disable all your plugins before you upgrade.

Apt-get all of the things

It’s an OS upgrade as well as an application upgrade. In an ssh session I ran

apt-get update && apt-get dist-upgrade && omv-update

This gets you up to date, then upgrades your distro (Debian), and then gets the necessary packages for omv. I then ran the omv upgrade.

omv-release-upgrade

This seemed to go well. I rebooted the box and could still access the shared data. Happy days. When I tried to access the web UI, however, I could enter my credentials but I couldn’t get in. I then ran

omv-firstaid

And tried to reconfigure the web interface. It kept complaining about a file not being found. So I ran

dpkg -l | grep openmediavault

This told me that there was still a legacy plugin (openmediavault-dnsmasq) running. I’d read on the forums that this might cause some problems. So I used apt-get to remove it.

apt-get remove openmediavault-dnsmasq

The next time I ran apt-get it told me there were some legacy packages present that I could remove. So I did.

apt-get autoremove dnsmasq dnsmasq-base libnetfilter-conntrack3

After that, I was able to login in to the web UI with no problems and everything now seems to be in order. When my new NAS arrives I’ll evacuate this one and rebuild it from scratch. There are a fair few changes in version 3 and it’s worth checking out. You can download the ISO image from here.

DNS Matters

The reason I had the dnsmasq plugin installed in the first place was that I’d been using the NAS as a DHCP / DNS server. This had been going reasonably well, but I’d heard about Pi-hole and wanted to give that a shot. That’s a story for another time, but I did notice that my OMV box hadn’t updated its /etc/resolv.conf feel correctly, despite the fact that I’d reconfigured DNS via the web GUI. If you run into this issue, just run

dpkg-reconfigure resolvconf

And you’ll find that resolv.conf is correctly updated. Incidentally, if you’re a bit old-fashioned and don’t like to run everything through DHCP reservations, you can add a second set of static host entries to dnsmasq on your pi-hole machine by following these instructions.