Package: podman Version: 3.0.1+dfsg1-3+b2 Severity: wishlist Dear Maintainer,
I had some problems running the dockerized version of the Unifi controller jacobalberty/unifi-docker with podman on Debian. On a Fedora system, starting the container only takes a few seconds. On a Debian system, it can take about 5 minutes. The reason is that on the Fedora system the mount-option metacopy=on (see [1] for this mount option) is set for the container overlayfs via a default /etc/containers/storage.conf. That makes quite the difference for this specific image because it does a `chown unifi:unifi /usr/lib/unifi` during startup. chown-ing these 6k files is fast with metacopy=on (on Fedora). Without the option (on Debian), I think the files will be copied instead of only their metadata, making it rather slow. So the solution for me was to copy /etc/containers/storage.conf from a Fedora system. If anyone has a similar problem, the file can be extracted from the src rpm of the containers-common package which can be downloaded at [2]. IMO it would be useful if Debian would also include a default /etc/containers/storage.conf. Thanks for considering this! However I'm not sure if metacopy=on is a good idea from a security perspective. Best Philip -- System Information: Debian Release: 11.2 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-10-amd64 (SMP w/2 CPU threads) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages podman depends on: ii conmon 2.0.25+ds1-1.1 ii containernetworking-plugins 0.9.0-1+b6 ii crun 0.17+dfsg-1 ii golang-github-containers-common 0.33.4+ds1-1 ii init-system-helpers 1.60 ii iptables 1.8.7-1 ii libc6 2.31-13+deb11u2 ii libdevmapper1.02.1 2:1.02.175-2.1 ii libgpgme11 1.14.0-1+b2 ii libseccomp2 2.5.1-1+deb11u1 Versions of packages podman recommends: ii buildah 1.19.6+dfsg1-1+b6 ii catatonit 0.1.5-2 ii fuse-overlayfs 1.4.0-1 ii golang-github-containernetworking-plugin-dnsname 1.1.1+ds1-4+b7 ii slirp4netns 1.0.1-2 ii uidmap 1:4.8.1-1 Versions of packages podman suggests: pn containers-storage <none> pn docker-compose <none> -- no debconf information [1]: https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html#metadata-only-copy-up [2]: https://kojipkgs.fedoraproject.org//packages/containers-common/1/32.fc35/src/containers-common-1-32.fc35.src.rpm