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Podman v3.0 fails to run a container on a readonly rootfs #9230

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Luap99 opened this issue Feb 4, 2021 · 0 comments · Fixed by #9231
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Podman v3.0 fails to run a container on a readonly rootfs #9230

Luap99 opened this issue Feb 4, 2021 · 0 comments · Fixed by #9231
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@vrothberg
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In Progress This issue is actively being worked by the assignee, please do not work on this at this time. kind/bug Categorizes issue or PR as related to a bug. locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments.

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@Luap99
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Luap99 commented Feb 4, 2021 •
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Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

Podman run fails with Error: error chowning container 01041b61625c64e34a849b974c5aa9dcc34377fd5025b9ee7fd629b2a0c5ad79 workdir to container root: chown /run/user/1000/test: read-only file system when I try to run a container with a read only rootfs.

This worked with v2.2.1.

Steps to reproduce the issue:

$ ROOTFS=/run/user/1000/test
$ mkdir $ROOTFS
$ podman unshare mount --rbind -r / $ROOTFS
$ podman unshare mount -t tmpfs none $ROOTFS/run
$ podman run -i -t --rootfs $ROOTFS sleep 5

Describe the results you received:

Error: error chowning container 01041b61625c64e34a849b974c5aa9dcc34377fd5025b9ee7fd629b2a0c5ad79 workdir to container root: chown /run/user/1000/test: read-only file system

Version

$ podman version 
Version:      3.0.0-rc2
API Version:  3.0.0
Go Version:   go1.15.6
Git Commit:   510a983a752a136a5df0bdbff9d14db0490956b2
Built:        Thu Feb  4 13:51:00 2021
OS/Arch:      linux/amd64
@openshift-ci-robot openshift-ci-robot added the kind/bug Categorizes issue or PR as related to a bug. label Feb 4, 2021
@Luap99 Luap99 changed the title Podman v3.0 fail to run container on a readonly rootfs Podman v3.0 fails to run container on a readonly rootfs Feb 4, 2021
@Luap99 Luap99 changed the title Podman v3.0 fails to run container on a readonly rootfs Podman v3.0 fails to run a container on a readonly rootfs Feb 4, 2021
@vrothberg vrothberg self-assigned this Feb 4, 2021
@vrothberg vrothberg added the In Progress This issue is actively being worked by the assignee, please do not work on this at this time. label Feb 4, 2021
@vrothberg vrothberg mentioned this issue Feb 4, 2021
Merged
vrothberg added a commit to vrothberg/libpod that referenced this issue Feb 5, 2021
@vrothberg
fix logic when not creating a workdir
821ef64 
When resolving the workdir of a container, we may need to create unless
the user set it explicitly on the command line.  Otherwise, we just do a
presence check.  Unfortunately, there was a missing return that lead us
to fall through into attempting to create and chown the workdir.  That
caused a regression when running on a read-only root fs.

Fixes: containers#9230
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
mheon pushed a commit to mheon/libpod that referenced this issue Feb 5, 2021
@vrothberg @mheon
fix logic when not creating a workdir
353c3b0 
When resolving the workdir of a container, we may need to create unless
the user set it explicitly on the command line.  Otherwise, we just do a
presence check.  Unfortunately, there was a missing return that lead us
to fall through into attempting to create and chown the workdir.  That
caused a regression when running on a read-only root fs.

Fixes: containers#9230
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
@edsantiago edsantiago mentioned this issue Jun 6, 2022
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@github-actions github-actions bot added the locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments. label Sep 22, 2023
@github-actions github-actions bot locked as resolved and limited conversation to collaborators Sep 22, 2023
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@vrothberg vrothberg

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fix logic when not creating a workdir vrothberg/libpod
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@vrothberg @openshift-ci-robot @Luap99