Podman and Docker fail to mount

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For me now too, the problem was that I had set some security settings which interfered with Docker.

Specifically, it was one of these settings:

security.lockKernelModules = true;
security.protectKernelImage = true;

security.forcePageTableIsolation = true;

# This is required by podman to run containers in rootless mode.
security.unprivilegedUsernsClone = config.virtualisation.containers.enable;

security.apparmor.enable = true;

boot.blacklistedKernelModules = [
        # Obscure network protocols
        "ax25"
        "netrom"
        "rose"

        # Old or rare or insufficiently audited filesystems
        "adfs"
        "affs"
        "bfs"
        "befs"
        "cramfs"
        "efs"
        "erofs"
        "exofs"
        "freevxfs"
        "f2fs"
        "hfs"
        "hpfs"
        "jfs"
        "minix"
        "nilfs2"
        "qnx4"
        "qnx6"
        "sysv"
        "ufs"
]