How to run podman from inside a container?

Question

I want to run podman as a container to run CI/CD pipelines. However, I keep getting this error from the podman container:

Answer 1

The suggestion from mihai succeeds for info but as soon as I try, for example, run --rm docker.io/library/hello-world I get an error:

error creating network namespace for container …: mount --make-rshared /var/run/netns failed: "operation not permitted"
failed to mount shm tmpfs "/var/lib/containers/storage/vfs-containers/…/userdata/shm": operation not permitted

I only managed to solve this by setting a non-root user for the image and then running the container in privileged mode, which defeats the purpose of the exercise since DinD could already do this:

FROM ubuntu:18.04

RUN apt-get update -qq \
    && apt-get install -qq -y software-properties-common uidmap \
    && add-apt-repository -y ppa:projectatomic/ppa \
    && apt-get update -qq \
    && apt-get -qq -y install podman \
    && apt-get install -y iptables

RUN adduser --disabled-login --gecos test test

USER test

ENTRYPOINT ["podman", "--storage-driver=vfs"]
CMD ["info"]

used as

docker build -t podman:test .
docker run --rm --privileged podman:test run --rm docker.io/library/hello-world