On Thu, 2024-05-30 at 17:02 +0800, Changqing Li via lists.openembedded.org
wrote:
> From: Changqing Li <[email protected]>
>
> Currently, set VOLATILE_TMP_DIR to "no", only make /tmp as persistent.
> This patch extends VOLATILE_TMP_DIR to also specify the persistence of
> /var/tmp by following changes:
>
> * change FILESYSTEM_PERMS_TABLES to remove symlink /var/tmp ->
> /var/volatile/tmp
> for the packaging process
> * update base-files to create /var/tmp as a dir not symlink to
> /var/volatile/tmp
>
> Here is an use case:
> Steps:
> 1. docker import core-image-minimal-qemux86-64.tar.bz2 poky:latest
> 2. docker run -it --rm poky:latest /bin/sh
> 3. /var/log /var/tmp are deadlinks, and cause "No such file or directory"
> errors
>
> Root cause:
> By default, /var/tmp links to /var/volatile/tmp, and /var/volatile/tmp
> usually created by initscript(sysV) or systemd-tmpfile.d(systemd) during
> boot up, but for container, initscript/systemd-tmpfile.d will not be
> executed, so /var/volatile/tmp is not created.
>
> This patch provides an option for user want to use container, set
> VOLATILE_TMP_DIR to "no" can resolve above case.
>
> Signed-off-by: Changqing Li <[email protected]>
Sorry it has taken me so long to get to this. I agree we should try and
fix the issues you raise here but I don't think the patch is quite the
best way to do it. What I'd propose is that we keen the new fs-perms
files you're creating but change the tables variable to simply be:
FILESYSTEM_PERMS_TABLES ?= " files/fs-perms.txt \
files/fs-perms-volatile-log.txt \
files/fs-perms-volatile-tmp.txt \
"
The other references can then simply work along the lines of:
${@bb.utils.contains("FILESYSTEM_PERMS_TABLES",
"files/fs-perms-volatile-log.txt", "log", "", d)}
and we drop the VOLATILE_*_DIR variables.
I'd suggest two patches, one separating out fs-perms-volatile-log.txt
and the other adding fs-perms-volatile-tmp.txt.
Cheers,
Richard
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