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podman exec fails on --user #2566

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maflcko opened this issue Mar 7, 2019 · 2 comments
Closed

podman exec fails on --user #2566

maflcko opened this issue Mar 7, 2019 · 2 comments
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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. rootless

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@maflcko
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maflcko commented Mar 7, 2019

/kind bug

Description

Podman always fails with

$ podman exec -u testu -i naughty_hugle echo
Error: unable to find user testu: no matching entries in passwd file

Steps to reproduce the issue:

$ podman run -i -t --rm ubuntu:bionic bash
# useradd -ms /bin/bash -U testu

// new terminal
$ podman container ls --all # find it
$ podman exec -u testu -i naughty_hugle true
Error: unable to find user testu: no matching entries in passwd file

For comparison in docker:

$ sudo docker run -i -t --rm ubuntu:bionic bash
# useradd -ms /bin/bash -U testu

// new terminal
$ sudo docker exec -u testu  -i laughing_feistel echo works
works

Additional information you deem important (e.g. issue happens only occasionally):

Output of podman version:

podman version 1.1.2

Output of podman info --debug:

(paste your output here)

Additional environment details (AWS, VirtualBox, physical, etc.):
@openshift-ci-robot openshift-ci-robot added the kind/bug Categorizes issue or PR as related to a bug. label Mar 7, 2019
@mheon
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mheon commented Mar 7, 2019

Works fine as root
@giuseppe Mind taking a look?

@mheon mheon added the rootless label Mar 7, 2019
@giuseppe giuseppe mentioned this issue Mar 7, 2019
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@giuseppe
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giuseppe commented Mar 7, 2019

PR here: #2569

giuseppe added a commit to giuseppe/libpod that referenced this issue Mar 7, 2019
@giuseppe
rootless: exec join the user+mount namespace
4a02713 
it is not enough to join the user namespace where the container is
running.  We also need to join the mount namespace so that we can
correctly look-up inside of the container rootfs.  This is necessary
to lookup the mounted /etc/passwd file when --user is specified.

Closes: containers#2566

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
@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 24, 2023
@github-actions github-actions bot locked as resolved and limited conversation to collaborators Sep 24, 2023
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@giuseppe @maflcko @mheon @openshift-ci-robot