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Clarify UID as GID can vary

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thespad 2024-06-26 21:33:29 +01:00
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docs/misc/read-only.md
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@ -30,7 +30,7 @@ Will mount its filesystem as read-only, and that cannot then be changed without
Our images use s6 as a supervisor and that needs to be able to write its service files to `/run`; many applications expect to be able to write to their working directory, changing UIDs and GIDs requires writing to `/etc/passwd` & `/etc/group`, installing new packages requires writing to numerous locations, and as discussed above, mods need to be extracted to the container filesystem. In short, there are some heavy limitations around read-only operation of our images: Our images use s6 as a supervisor and that needs to be able to write its service files to `/run`; many applications expect to be able to write to their working directory, changing UIDs and GIDs requires writing to `/etc/passwd` & `/etc/group`, installing new packages requires writing to numerous locations, and as discussed above, mods need to be extracted to the container filesystem. In short, there are some heavy limitations around read-only operation of our images:
* The PUID & PGID variables will not have any effect, the container will run applications as 911:911, and will apply those permissions to `/config`. * The PUID & PGID variables will not have any effect, the container will run applications with a UID of 911, and will apply those permissions to `/config`.
* The UMASK variable will not have any effect * The UMASK variable will not have any effect
* Docker Mods will not be run * Docker Mods will not be run
* Custom Services will not be run * Custom Services will not be run