rootless: pods: unlinkat, EBUSY #7139
Description
Are pods supposed to work with podman-remote? There's a race condition somewhere in rootless pods. (There's one in rootful, too, but I'm having a really hard time getting a reproducer).
In window 1:
$ ./bin/podman system service --timeout=0In window 2:
$ cat >foo.sh <<EOF
#!/bin/bash
./bin/podman-remote pod create --infra=true --name=foo
cid=$(./bin/podman-remote run -d --pod foo alpine sleep 1)
./bin/podman-remote run --rm --pod foo alpine true
sleep 1
/bin/time ./bin/podman-remote rm $cid
/bin/time ./bin/podman-remote pod rm foo
EOF
$ bash -x foo.sh
+ ./bin/podman-remote pod create --infra=true --name=foo
4e182754caf7e065917a258a9a5ebc4c29498df1f2381b165c10616c458ebedf
++ ./bin/podman-remote run -d --pod foo alpine sleep 1
+ cid=82822d1b6544692162118f553b857a10490a6a18ebd2ae6ecb1c088eec661c37
+ ./bin/podman-remote run --rm --pod foo alpine true
+ sleep 1
+ /bin/time ./bin/podman-remote rm 82822d1b6544692162118f553b857a10490a6a18ebd2ae6ecb1c088eec661c37
Error: error removing container 82822d1b6544692162118f553b857a10490a6a18ebd2ae6ecb1c088eec661c37 root filesystem: 1 error occurred:
* unlinkat /home/esm/.local/share/containers/storage/overlay/3ba0c1f06abbda6296b7fd183b776c212bb5cf352100ea1ff6e93bd543204037/merged: device or resource busy
Command exited with non-zero status 125
0.03user 0.03system 0:10.12elapsed 0%CPU (0avgtext+0avgdata 29276maxresident)k <--- note: 10s
0inputs+0outputs (0major+2127minor)pagefaults 0swaps
+ /bin/time ./bin/podman-remote pod rm foo
Error: error removing container 59f9f424ad65a88f4b55af3873a00259f74eeb8e4ab56e6bf1e01f041e822d84 root filesystem: 1 error occurred:
* unlinkat /home/esm/.local/share/containers/storage/overlay/02b1322ceed80312346340312c1068d832727ac30a3683c6c6b2cb22073c40fa/merged: device or resource busy
Command exited with non-zero status 125
0.04user 0.03system 0:10.29elapsed 0%CPU (0avgtext+0avgdata 29292maxresident)k <---- note: 10s
0inputs+0outputs (0major+2240minor)pagefaults 0swapsThis leaves droppings behind, the two directories listed above. I can remove them manually:
$ /bin/rm -rf ~/.local/share/containers/storage/overlay/3ba*
$ /bin/rm -rf ~/.local/share/containers/storage/overlay/02b*
(no errors)FWIW I can't reproduce by running the commands manually in my shell; only by running the script above.
master @ 7f38774, rootless only. f32 with crun