[Podman] Re: named pipes doing a disappearing act

On 7/22/21 10:03, Manvendra Bhangui wrote: > I have created images for my software using the podman build command. My > application uses named pipes to communicate. So during installation I > create the fifo using the mkfifo command. But when I start the container > I find all named pipes missing. Every time I start the container, > I have to re-create the pipes using mkfifo. I have tried images from > fedora, debian, ubuntu, opensuse and the problem is being faced on > all. Apart from named pipes, other types of files are getting saved. > As a workaround, I run a script using docker-entrypoint to recreate > the named pipes. > > This is not happening if I use docker command to run the image. > Even images built by the docker build command, when I use > podman to run the image, the named pipes go missing. > > This is all I did to simulate the issue > > 1 podman pull someimage > 2 podman run --name test -ti imageid bash >    cd /root >    mkfifo test > 3 podman save test test > 4 podman stop test > 5 podman run --name test -ti newimageid bash >    cd /root >    ls -l # this shows that the file is missing and didn't get saved > > I have pasted the result of the test using podman and docker here > > https://termbin.com/7s5u > > Is there anything special I need to do to have these files seen and > accessible? > > -- > Regards Manvendra - http://www.indimail.org > GPG Pub Key > http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC7CBC760014D250C > _______________________________________________ > Podman mailing list -- podman(a)lists.podman.io > To unsubscribe send an email to podman-leave(a)lists.podman.io Built a little script. This works in rootfull and fails in rootless. cat /tmp/test.sh podman rm test1 podman rmi image1 podman run --name test1 fedora mkfifo /root/test podman diff test1 podman commit test1 image1 podman run image1 ls -l /root/test