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docs: document how to turn off btrfs quota support in importd

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Fixes: #18421 #15903
This commit is contained in:
Lennart Poettering 2021-02-03 21:50:27 +01:00
parent 7ade22c79b
commit 23851640b8
1 changed files with 19 additions and 0 deletions
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docs/ENVIRONMENT.md
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@ -316,3 +316,22 @@ fuzzers:
Note that is may be also useful to set `$SYSTEMD_LOG_LEVEL`, since all logging
is suppressed by default.
systemd-importd:
* `SYSTEMD_IMPORT_BTRFS_SUBVOL` – takes a boolean, which controls whether to
prefer creating btrfs subvolumes over plain directories for machine
images. Has no effect on non-btrfs file systems where subvolumes are not
available anyway. If not set, defaults to true.
* `SYSTEMD_IMPORT_BTRFS_QUOTA` – takes a boolean, which controls whether to set
up quota automatically for created btrfs subvolumes for machine images. If
not set, defaults to true. Has no effect if machines are placed in regular
directories, because btrfs subvolumes are not supported or disabled. If
enabled, the quota group of the subvolume is automatically added to a
combined quota group for all such machine subvolumes.
* `SYSTEMD_IMPORT_SYNC` – takes a boolean, which controls whether to
synchronize images to disk after installing them, before completing the
operation. If not set, defaults to true. If disabled installation of images
will be quicker, but not as safe.