Re: [Bacula-users] Bacula and vchanger Cannot Label Volume

On 5/12/2016 7:24 AM, Pann Tolk wrote:

I believe I have found the cause of the problem posted earlier.

Apparently, systemd isolates processes launched by udev by putting them into a different mount namespace, which prevents new mounts from propagating back to the main namespace. So, by default mounts done within udev .rules do not propagate back to the host.

To fix this problem, I need to edit the "MountFlags=" in "/usr/lib/systemd/system/systemd-udevd.service". Changing it from "MountFlags=slave" to "MountFlags=shared" solved the problem.

However, I'm not sure if this permanently fixes the problem...ie not sure if the next update will cause the change to revert back to original setting.

Nice work finding that! I never expected that systemd would get so involved with the OS. The more I deal with systemd, the less I like it and the more it reminds me of Windows WININIT.

This almost certainly has to do with docker, which perhaps needs slave mode to prevent an unexpected umount. But why can't this setting be in /etc/systemd/system.conf? My bet is that everything in /usr/lib/systemd can and will be overwritten by an update.

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