Notes on Nextcloud
On Nextcloud “apps” and UBOS Accessories
First, let’s be clear about our terminology:
Nextcloud doesn’t call itself an “app”. Instead, it calls code that adds functionality to Nextcloud (like the Nextcloud calendar or address book) an “app”. However, in UBOS terminology, that is called an Accessory.
How to install Nextcloud “apps”
Armed with this understanding, how does one install what Nextcloud calls an “app”, which is what UBOS calls a Nextcloud Accessory? Usually, you would log into your Nextcloud installation as administrator, navigating to the “apps” pages, and pick install new ones from there.
This is not how it works on UBOS.
Example: let’s say you want to use the Nextcloud “Calendar” “app” for your Site.
When you create the Site with
ubos-admin createsite, you specify
as your App, and
nextcloud-calendar as an Accessory. You can specify
multiple Accessories as you like.
Notes on Nextcloud “social”
UBOS makes the Nextcloud “Social” “app” available because users have requested it. However, it is still marked as “alpha” by its developers, and in our experience, this assessment is correct. In other words, if you decide to deploy it, do not rely on it working.
How to install OnlyOffice and the corresponding document server
This requires two accessories:
You may receive the message “ONLYOFFICE cannot be reached. Please contact admin”. This is because you accessed your Nextcloud through a hostname or IP address different from what the Nextcloud installation expected.
To set the address at which the document server is available, go to the OnlyOffice Settings in the Nextcloud user interface (as administrator, go to Settings, section Administration, select ONLYOFFICE), and edit the Document Editing Service address. The URL there must start with the same protocol, hostname and path as the URL you are using to access Nextcloud.
You may also need to set this the first time you access Nextcloud after initial deployment.
This is a limitation of the current Nextcloud/OnlyOffice integration.
How to install full-text search
This requires three accessories:
UBOS will automatically run all required daemons and associated commands.
How to skip a Nextcloud version during upgrade
If you don’t update your UBOS Device regularly, it may happen that you missed an entire major Nextcloud release by the time you do finally upgrade. For example, if you deployed your Site originally with Nextcloud 21, and waited a while to upgrade, the current version may now be Nextcloud 23. This is a problem because Nextcloud does not support skipped upgrades.
You may first experience this issue when you finally performed a Device update, and you got an error message saying that UBOS cannot upgrade your Nextcloud for this reason. In this case, when accessing Nextcloud with your web browser, Nextcloud will say that it is in maintenance mode.
This issue is a known Nextcloud issue, and really needs to be solve by the Nextcloud developers. We can only provide workarounds. The best one, of course, is to regularly update your UBOS Device, so you do not end up in this situation. But if you do anyway, here is a possible workaround:
First create a backup of your Nextcloud installation with
ubos-admin backupwith suitable arguments. Which arguments to use depends on your situation, such as how many Sites you have on your Device. If you have only one Site on your Device, you might want to run:
% sudo ubos-admin backup --all --backuptofile mybackup.ubos-backup
Undeploy the Site running Nextcloud with
ubos-admin undeploy. Depending how you have set up your Site or Sites, it might be easiest to undeploy the entire Site, or all Sites on your Device, with a command such as:
% sudo ubos-admin undeploy --all
Make triply sure first that you have a backup for everything you will undeploy!
Upgrade your Device with
sudo ubos-admin update.
Now restore your backup, while telling UBOS to replace package
nextcloudwith the package that contains the Nextcloud version that you skipped. UBOS provides older Nextcloud packages that are still supported by Nextcloud, with version numbers appended, such as
nextcloud22for Nextcloud version 22.
The additional arguments to the
ubos-admin restorecommand are
--migratefrom nextcloud --migrateto nextcloud22if you skipped Nextcloud 22. So the full invocation may be:
% sudo ubos-admin restore --migratefrom nextcloud --migrateto nextcloud22 --in mybackup.ubos-backup
Once you have done that, you need to migrate from the skipped Nextcloud version to the current version. So we go through backup and restore one more time:
ubos-admin backupas above, undeploy the restored Site now running the skipped Nextcloud version, and finally migrate to the current one by using flags
--migratefrom nextcloud22 --migrateto nextcloudwith the
Now you should be back and running. You can clean up by removing the skipped Nextcloud version’s package with
pacman -R nextcloud22.
If you skipped more than one version, you may have to go through this process more than once, starting with the oldest skipped version and migrating to the next one one at a time, e.g.
--migratefrom nextcloud --migrateto nextcloud21 ...
--migratefrom nextcloud21 --migrateto nextcloud22 ...
--migratefrom nextcloud22 --migrateto nextcloud ...
Sorry for the complications, but this is the best we can do. Best is to regularly update your UBOS Device.
You can ignore any error message about
AbstractSystemdItem::_switchOff ... smtp-server22@...
that might be printed under some circumstances.
If you use the Nextcloud Social app, you may see the message:
.well-known/webfinger isn't properly set up!
This is an incorrect error message, and you can ignore it. It requires a fix upstream in Nextcloud Social (see this issue).