Hi, I was wondering how conffiles should be handled with snapcraft / snaps in general. I understand that for a more "app" style application the configuration is mostly via some kind of UI/ webserver and it can store that "locally" in it's data dir.
But for the common pattern of a server application with /etc/something.conf - how is that supposed to be working for snaps? That scheme is quite common in the server application world, so I expect there already was some thought or discussion, but my searches didn't find something good. Neither did my IRC request this afternoon so I thought it might be worth to write to the list. So in the .deb world one would have: 1. a package owning the conffile, usually the one with the binary(ies) reading the conffile 2. maintainer scripts to handle upgrade path with e.g. changed formats 3. a million guides out there in the web that refer to e.g. /etc/syslog.conf with their explanation I wonder how that should be handled when snapping such an app: 1. ok, it can belong to a snap that has the binaries consuming it. It gets a bit weird if there are multiple snaps bundling the same binaries thou (relatively rare I hope as libs don't have that much conf) 2. is there an active element in http://snapcraft.io/docs/core/updates that I missed 3. a new /etc interface being read-only for the snap? - maybe with interface-parms defining which files should be accessible? Yet how would the snap make the snap the available in /etc oon install? The only snap-centric artifact about it I found was [1]. But that feels broken/outdated as there is no "snappy" command anymore (and snap has no "config" subcommand). I'd be really happy to get some useful pointers or - if not already defined and documented - to kick off some discussion about it. [1]: https://developer.ubuntu.com/en/snappy/guides/config/ -- Christian Ehrhardt Software Engineer, Ubuntu Server Canonical Ltd
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