Podman dans Podman, similaire à Docker dans Docker?

Oct 24 2020

Existe-t-il un moyen d'exécuter Podman dans Podman, de la même manière que vous pouvez exécuter Docker dans Docker?

Voici un extrait de mon Dockerfile qui est fortement basé sur une autre question :

FROM debian:10.6

RUN apt update && apt upgrade -qqy && \
    apt install -qqy iptables bridge-utils \
                     qemu-kvm libvirt-daemon libvirt-clients virtinst libvirt-daemon-system \
                     cpu-checker kmod && \
    apt -qqy install curl sudo gnupg2 && \
    echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list && \
    curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/Release.key | sudo apt-key add - && \
    apt update && \
    apt -qqy install podman

Maintenant, essayez quelques tests:

$ podman run -it my/test bash -c "podman --storage-driver=vfs info" ... (long output; this works fine) $ podman run -it my/test bash -c "podman --storage-driver=vfs images"
ERRO[0000] unable to write system event: "write unixgram @000ec->/run/systemd/journal/socket: sendmsg: no such file or directory" 
REPOSITORY  TAG     IMAGE ID  CREATED  SIZE

$ podman run -it my/test bash -c "podman --storage-driver=vfs run docker.io/library/hello-world"
ERRO[0000] unable to write system event: "write unixgram @000ef->/run/systemd/journal/socket: sendmsg: no such file or directory" 
Trying to pull docker.io/library/hello-world...
Getting image source signatures
Copying blob 0e03bdcc26d7 done  
Copying config bf756fb1ae done  
Writing manifest to image destination
Storing signatures
ERRO[0003] unable to write pod event: "write unixgram @000ef->/run/systemd/journal/socket: sendmsg: no such file or directory" 
ERRO[0003] Error preparing container 66692b7ff496775499d405d538769a078f2794549955cf2409fcbcbf87f42e94: error creating network namespace for container 66692b7ff496775499d405d538769a078f2794549955cf2409fcbcbf87f42e94: mount --make-rshared /var/run/netns failed: "operation not permitted" 
Error: failed to mount shm tmpfs "/var/lib/containers/storage/vfs-containers/66692b7ff496775499d405d538769a078f2794549955cf2409fcbcbf87f42e94/userdata/shm": operation not permitted

J'ai également essayé une suggestion de l' autre question , en passant --cgroup-manager=cgroupfs, mais sans succès:

$ podman run -it my/test bash -c "podman --storage-driver=vfs --cgroup-manager=cgroupfs run docker.io/library/hello-world"
Trying to pull docker.io/library/hello-world...
Getting image source signatures
Copying blob 0e03bdcc26d7 done  
Copying config bf756fb1ae done  
Writing manifest to image destination
Storing signatures
ERRO[0003] unable to write pod event: "write unixgram @000f3->/run/systemd/journal/socket: sendmsg: no such file or directory" 
ERRO[0003] Error preparing container c3fff4d8161903aaebd6f89f3b3c06b55038e11e07b6b561dc6576ca675747a3: error creating network namespace for container c3fff4d8161903aaebd6f89f3b3c06b55038e11e07b6b561dc6576ca675747a3: mount --make-rshared /var/run/netns failed: "operation not permitted" 
Error: failed to mount shm tmpfs "/var/lib/containers/storage/vfs-containers/c3fff4d8161903aaebd6f89f3b3c06b55038e11e07b6b561dc6576ca675747a3/userdata/shm": operation not permitted

Il semble qu'une configuration réseau soit nécessaire. J'ai trouvé le projet ci-dessous qui suggère que quelques ajustements sur les configurations réseau pourraient être nécessaires, mais je ne sais pas quel en serait le contexte et si cela s'appliquerait ici ou non.https://github.com/joshkunz/qemu-docker

EDIT : je viens de découvrir /var/run/podman.sock, mais aussi sans succès:

$ sudo podman run -it -v /run/podman/podman.sock:/run/podman/podman.sock my/test bash -c "podman --storage-driver=vfs --cgroup-manager=cgroupfs run docker.io/library/hello-world"
Trying to pull my/test...
  denied: requested access to the resource is denied
Trying to pull my:test...
  unauthorized: access to the requested resource is not authorized
Error: unable to pull my/text: 2 errors occurred:
        * Error initializing source docker://my/test: Error reading manifest latest in docker.io/my/test: errors:
denied: requested access to the resource is denied
unauthorized: authentication required

        * Error initializing source docker://quay.io/my/test:latest: Error reading manifest latest in quay.io/my/test: unauthorized: access to the requested resource is not authorized

On dirait que rootje ne peux pas voir les images que j'ai créées sous mon utilisateur.

Des idées? Merci.

Réponses

1 ErikSjölund Oct 26 2020 at 19:29

Supposons que nous souhaitons fonctionner ls /dans un conteneur docker.io/library/alpine .

Podman standard

podman run --rm docker.io/library/alpine ls /

Podman à Podman

La course de Let ls /dans un docker.io/library/alpine conteneur, mais cette fois , nous courons podmandans un quay.io/podman/stable conteneur.