balena-supervisor
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balena-os
The supervisor should automount removable storage and provide it to specified containers
The supervisor should mount both removable storage which is present at boot, and any hot-plugged storage and mount it into /media on the OS.
Any services which specify the io.balena.features.external-storage label should have the /media directory mounted into the container (/media being the container path too).
Automounting should be controlled via a host configuration variable (which defaults to true) BALENA_HOST_CONFIG_AUTOMOUNT. This should also be exposed via the dashboard.
cc @kenna-smith @shaunmulligan @20k-ultra @szony
related https://github.com/balena-io/balena-io/issues/1888 and https://trello.com/c/447Z4Pq7/39-auto-mount-external-usb-storage-drives-in-os-if-they-have-a-specific-label
The Supervisor is started with --privileged flag so all that's needed to get udev events is to add ENV UDEV=on to the dockerfile.
No configurable toggle will be used just labels as decided in 01-14-2021 arch call.
Regarding mounted /dev directory on containers by the OS https://github.com/balena-os/balena-engine/issues/125
[anujdeshpande] This issue has attached support thread https://jel.ly.fish/d5b1d2f5-e166-4023-9378-94d718e5d524
I believe this should be cross-linked here: https://github.com/balena-io/balena-io/issues/1288
If the Supervisor mounts the device in /media and then mounts that folder into the containers, we should see if the containers are able to perform operations such as formatting because this would be a useful feature. The concern is that the device will be marked as "in use" so applications won't be able to format the drives.
[hades32] This issue has attached support thread https://jel.ly.fish/f79bab57-cc1f-4096-a855-d4da1d456cd9
[the-real-kenna] This issue has attached support thread https://jel.ly.fish/caee95cf-b9a0-4c34-97e1-02ec63107520